It's called "windmilling". The engine is spinning because of wind or something. Since all the blades in the engine are loose (so that when its at high rpm, all the blades find their natural center to prevent vibration) you get this sound as the blades shift both at the top and at the bottom of the fan.
i tought that it was the internal engine that is cooling down. shrinking metal. you can hear the same sound on a porshe its exhaust when its cooling down.
@angeloinchicago re: there seems to be a 50/50 argument between those average person saying this is NOT normal and mechanics who say IT IS NORMAL. you forgot to factor in the 50% of youtube viewers who love to see chaos, panic, and disorder
This is perfectly normal when parkign an aircraft with a tail wind, if you look at the turbine blades the wind is blowing them in the wrong direction, thsi festure stops the blades blowing up too fast
Sounds like a blade is scraping against the case. There is VERY tight clearance between the blades and the outer case to prevent leakage from stage to stage.
those aren't sparks. that's the rear of the outer fan cowl. As the fan rotates you can see parts of the ground and air behind it. That clinking noise is also normal. fan blades are not actually welded, screwed, or nailed into the engine. they have particular slots at the base of each blade that expand and pull as the blade spins faster. the base of the blade that holds it to the shaft of the engine is actually nicknamed "the Christmas Tree" because of how it is shaped and slotted. :-)
@AirForceBoy2005 very interesting, so when the engine is off and the fan is spinning slowly as in this video the blades are loose? so that means at take off thrust or higher thrust the blades are strong? correct?
@houshidar558 the blades are strong regardless but the centrifugal force (i think that's how you spell it) plays a very key part in that motor's integrity
I'm an A&P (airplane technician) for a major airline and I see and hear this daily in my workplace. The other people who commented here have hit the nail on the head and must also work within the industry. The blades in the fan section of jet engines fit loose in the hub and tighten when under power.Blades are removed and the ends lubed to keep them loose in the fan hub. As for the steam you saw in the aircraft's interior it's just condensation given off by the ACM's (a/c units) They blow COLD!
The smaller CF34-8 is also a high bypass fan, and sounds very similar. If I didn't hear this sound, I would have to remove the engine from service for inspection and repair.
The turbine blades are loose when the engine is at low rpms. They only seat in their mounts at at high rpms. This design prevents excessive vibration buildup leading to cracking and blade loss.
@n7275 Exactly, the US Military C-17 does the exact same thing (proof that this is OK and not a bad engine) but otherwise pretty much every jet engine I have encountered does this to some degree.
@Sterlingjob No, the compressor blades in this engine(CFM-56 looks like) are fixed to the compressor rotor, the turbine blades are loose. Check out: watch?v=phludDUfakg
@n7275 I guess that would explain the noises the youtube user is talking about. I gather you know about these matters better then average, would the apparent sparks be random reflections perhaps?
@TheMrbum The noises are indeed from the lose turbine mountings. The "sparks" are caused by the digital camera's low FPS, they're only the light from the end of the engine, since it's usually see through, but due to the spinning blades it appears like sparks when filmed with a digital camera.
@mtrujillo1973 Yes, you are right. I mixed it up with the first turbojet engines, where the turbine blades were still loose to compensate for the temperature change, whereas in modern turbofan engines the blades are hollow and constantly cooled. My post wasn't exactly ridiculous though, since it used to be the case. After all I'm not an engine engineer anyways, I just try to fly these things as safe as possible. :)
CEBU PACIFIC service not good at all, and every time you book online at cebu pacific a lot of hidden charges will be added to your fare....example. manila to kalibo Php 999.00 one way but the end of the booking you make it will cost the total amount of Php 1,738.48 in this amount insurance is included but in this price only hand carry baggage are allowed the 15 kilos baggage is NOT FREE OF CHARGE.this airline is not a budget airline anymore.
I personally have never heard this noise from any jet before.. but there's a good reason for that. Pretty much every jet at a busy airport has it's engines at idle, they rarely ever turn off the turbines completely. In this video you can clearly hear that there is no turbine noise therefore it's off and the blades are rotating freely which could cause this metal clanging noise. It's nothing to be worried about.
The fog or dry ice smoke is only the water in the air condensing/evaporating as the altitude or air pressure changes. As the crew adjusts the air pressure inside the cabin to compensate for the lack of Oxygen and air pressure at the higher altitudes. Hence the need for Oxygen Masks if the cabin were to lose pressure.
Thts normal..walking past a USAF douglas dc10 at an airshow the same noise was heard..the plane was on display and the wind was spinning the blades in same fashion...MrGermany18 is correct..the blades are loose at low rpm until they spool up and force locks them in place.
Ok first of all the engine is either windmilling, or just slowing down after shutdown, and YES THAT NOISE IS NORMAL. Fan blades are held on loosely to allow for expansion of the blades while spinning. Once the fan spins, centrifugal force holds the blades in place. Any other questions?
I work at FedEx Express Aircraft MX and if that noise was bad every turbine engine I ever worked on is bad, normal noise turbine blades make when coming to a stop.
Some says It's the sound of blades cooling off....or wind milling....or disk clanging on their fitting...or turbine blades not locked to wheels....or turbine blades sliding in the mounts.....or shroud contacts caused by low ground wind.....and many other diagnoses.
It also sounds like metal grinding. Most likely it's normal as people say.
But what if it's really metal grinding. It also sounds like this.
One thing is sure, The mechanics won't be on board. The passengers are. lolz...
Whe the turbine blades cool after flight they do not fill the entire holding bracket so they jiggle around a bit but when the engine starts and runs they heat up expand and lock into place
@Inkolning. If we were to take your logic in this case. then no 737 Classic or New gen or Airbus A318, 19, 20 or 21 would be flying as we would be constantly making physical inspections for "grinding metal" on every single CFM56 in the world. every single day of the year. Because that IS the sound the CFM makes when it is windmilling. In the meantime they will keep shingling and flying, as long as the trending, analysis, inspections, and indications are normal.
@MrAtlant It can still fly after safety check. The point is you don't put the lives of people on the ears of "Experts". There should be some more safety measures in any form more reliable than "hearing" or instinct of "Experts" These experts, have already killed many people due to simple neglect.
@InkoIning Did you hear about Alaska Airline Crash I think about 10 yrs ago from Puerta Villarta to I think LA. The culprit was Stabilizer Trim, some part was worn out and there were also signs of metal fatigue. Meaning, on prior flights, there should be some indication even a fraction of a point less than normal. But experts, (maybe pilot or mechanics) ruled it as normal. How could this PRIDE be the cause of so many deaths when a simple inspection could have saved lives.
@MrAtlanticpingpong Of course I acknowledge that Expert ears saves lives maybe 95% of the time. But is human lives worth risking for even 5%?
Again Alaska Airlines, Worn out Jack Screw Stabilizer Trim if I correctly name it. Prior Pilots or maintenance guys must have heard some indication that it was worn out. But the Expert Ears prevailed. A simple inspection could have saved those people.
No sparks, poor quality video.......common sound of that GE engine windmilling. Also, how could an engine NOT under power (off) produce sparks? Sparking implies friction, friction would suggest an engine that would be difficult to move. This video (although poor) clearly shows the fan rotating with the wind freely.....no friction
@monkeyboyfoo and it's funnier when "Pilots" these days got their degree in Youtube and flew stimulator Boengs 999 and brag about their supposed knowledge.....lolz.
@joypoPHDsoan Ok buddy, you win. I'll take my two degrees in aviation and my pilots certificate and go now. Good luck with those sims, they seem to be working out really well for you!
@monkeyboyfoo not a bad idea, I could get one of these Sims whatever they are called and I'll be a Youtube Pilot too. Watch out for my expert opinions in the next few weeks lolz...
Back at Pearl Harbor two private radar operators spotted air crafts in their radars sties. When they reported to the Captain they were told those were the US military planes coming to Hawaii on that day. The privates said it looks like hundreds rather than just a squadron. The Captain replied it happens many times before when he was supervising raddar units in the Pacific and did not look further. The rest is history.
Experts can tell us things and we believe them and our lives depends on them. But friends I've seen experts make horrible mistakes. On my younger days I've worked on a factory and at times the serior Engineers would say the sound or vibrations are normal while just by listening I could tell something isn't right. Some of times I'm correct and we broke down after an hour. By the book that sounds normal but think about hundreds of screws and bolts, something might not be right in there to sound li
@InkoIning lots of mechanics here declared the sound to be normal without even doing physical inspection. One thing to test the knowledge of an expert is to ask him to demonstrate his contention by recreating the formula or composition that produced the challenge sound or vibration. I just hoped that the mechanics at Cebu Pacific really looked into that sound anomaly and not just dimiss it as normal. Common sense tells you some metals are grinding in there.
Agreed it's a typical noise made by what appears to be the CFM56 as fitted on the Airbus you were on. The technical name is "shingling" and is caused by the relaxed blade roots of the Stage 1 Fan disk blades clancking around in their fittings. as the fan spins. Still can make you wonder if you're not sure what it is.
Turbine blades aren't locked into the turbine wheel, instead they are allowed to free--float until they build enough rotational inertia that they seat themselves. The noise is the turbine blades sliding around in their mounts.
Yes, that is perfectly normal. I used to design fan blades for Pratt and Whitney. Three quarters of the way out on the big first stage of blades are metal extensions from the blade that are called shrouds. At power, the shrouds fill the gap forming a ring. On the ground, if the wind is right, it will spin the engine low speed spool kind of like a pin wheel. The sound that you are hearing is as one shroud contacts another to close the gap as the blade pass through the 12:00 location (top).
Also, If there was something wrong with the engine you would've found out while it was running, trust me. Even tiny imperfections and imbalances show up when a jet engine is running because of how fast it spins. If the fan blades were hitting something or were damaged, you would've felt huge vibrations when the engine was on and the engine would've shook itself apart. Also, sensors in the engine would've let the pilots know of any major problem. -A&P Mechanic and Aerospace Engineer
This is definitely normal. It's just the sound of the fan blades moving around in the hub as the fan windmills.They blades DO NOT hit each other or the fan case as someone else said. I couldn't see any sparks, but I guarantee there weren't any. There is nothing at the front of the engine that could make a spark and the fan blades would not spark even if they struck something because they're made of titanium. It's just light coming through the blades from behind or reflecting off the raindrops.
@MySu47Berkut "I think someone threw a stone in there." I generally don't let grammar phase me, especially in YouTube comments, but that was quite egregious.
@MySu47Berkut It's really just a grammar and spelling thing.
"I Think Someones Thru a Stone In Their" should be "I think someone threw a stone in there." The wrong word was used for "someone," "threw," and "there." Also, you're capitalizing every word, which is more than what is found, even, in titles.
the steam/smoke is from the air plane depressureising, the hot,humid air from the Phillipines is coming in thru the air conditioner, causing the steamy effect when it mixes with the air from wherever you came from
their is nothing wrong with that Engine it,s just wind milling and the so called sparks is the light shinning thru the engine between the turbin blades..And the spound is just the Blades moving around as the fan turns in the wind..Totally normal
I heard similar clicking but a whole lot louder on a parked Boeing military aircraft with all 4 engines. very normal for the fan(front of engine) to rotate from wind and make clicking
Windmilling as others mentioned? Yes. As for the noise, Some of the compressor stages on the propulsor section have blades mounted kinda loosely. They have a beveled base that inserts or slides into place. A shim is inserted underneath the base with bendable tabs that holds it in place. There's a bit of play. Think of a minute hand on a clock with too much play in it. When it gets to 12, it flops over to one side. This is the clicking noise.
Like some people say here the clicking sound is the fan blades normaly lose when the engine shut down and turning by wind (Windmilling). Replacing these blades is just simply sliding them out. During startup centrifugal force push them outward like spining a bucket of water. Notting to see here move along lol,
also- the mist from the overhead is probably condensation from the air conditioning, which, in a humid environment, can really draw out a lot of moisture.
Another airline mechanic here... yup, normal. That noise is typical windmilling. After watching several times, that looks like light catching on raindrops rather than light from the fan blades.
@cynon767 Wow, that is a great suggestion, and it makes perfect sense. It was raining and light would easily reflect of water. Thanks for the post. Angelo
@angeloinchicago if I may throw in my two cents in here. I don't think it's rain at all. That is a CFM 56 high bypass turbofan. The bypass section essentially bypasses the jet core of the engine and you can see right through it. That is why when the blades are caught in a certain angle with the camera you can see the other side...not a reflection.
I am an aircraft mechanic with my IA. This is simply the fan windmilling. The "sparking" is nothing more then light shinning through the gaps made by the fan rotating past stator blades. There is nothing there that could spark, the blades are made of a nickel alloy which doesn't spark. The area where the fan could theoretically contact the case is built up composite material. There are no potential sources of electricity that could create a visible arc outside of a buttoned up engine.
Seems legit.
mollymindfreak 1 hour ago
The "sparks" is light seen trough the fan... The noise, is the blades loose, because of the lack of rotation speed.
Volans2000 3 hours ago
It's called "windmilling". The engine is spinning because of wind or something. Since all the blades in the engine are loose (so that when its at high rpm, all the blades find their natural center to prevent vibration) you get this sound as the blades shift both at the top and at the bottom of the fan.
theevilmeister 4 days ago
this video is invalid shut up!!!!
ghettoperson257 6 days ago
Wow people its not sparks, Thats rain.
TonyTheLiger94 1 week ago
Let me guess, you're one of these douchers that thinks it's cute for you and your kid to blow into my pitot tubes at an airshow... -___-
GreatWhite85 2 weeks ago 2
normal, when you dont hear that clanging noise that means the turbines are going fast, and you may want to move before you get sucked into them.
Secretariat224159 2 weeks ago 2
xDD at first i thought it was carnival music :DDD
sakykBzz 3 weeks ago
Just fan blades windmillimg.
addplusminus35 1 month ago
i tought that it was the internal engine that is cooling down. shrinking metal. you can hear the same sound on a porshe its exhaust when its cooling down.
cba999casey 1 month ago
The blades are loose mounted to prevent bad vibration and rattle when the engine is slowing
scoomagee 1 month ago
Yes it sounds scary. Perfectly normal. No biggie man :-)
ilikewendysthebest 1 month ago
The "sparks" are is just light from through the engine showing through the gaps in the fan blades
RossM236 2 months ago 3
It's normal. No worries :)
TheCessnaDriver 2 months ago
not sparks. Safety. Read about turbofans.
rostit420 2 months ago
Answer to your question: phludDUfakg
AlexPimienta 2 months ago
@angeloinchicago re: there seems to be a 50/50 argument between those average person saying this is NOT normal and mechanics who say IT IS NORMAL. you forgot to factor in the 50% of youtube viewers who love to see chaos, panic, and disorder
jonjoy1999 2 months ago
thats why planes dont eat head candy...
Wadef16 3 months ago
Normal sound. The turbine blades are loose in their mounts. So the clicking sound.
Florian112RE 3 months ago
@Florian112RE Compressor blades not turbine
Sterlingjob 3 months ago
@Sterlingjob
Yes, of course. You are right, sorry!
Florian112RE 3 months ago
bad sound
aumalapira 3 months ago
This is perfectly normal when parkign an aircraft with a tail wind, if you look at the turbine blades the wind is blowing them in the wrong direction, thsi festure stops the blades blowing up too fast
FlightProgramAborted 3 months ago
Cebu pacific does not involved in any other plane crash after the Cebupacific Flight 387,,
cutemepo1213 3 months ago
Sounds like a blade is scraping against the case. There is VERY tight clearance between the blades and the outer case to prevent leakage from stage to stage.
adamkajones 3 months ago
its NORMAL zzzzzzz
tuldok143143 3 months ago
dont worry folks, we're almost finished milling 1 sack of rice down here...
phukemonster 3 months ago
"I think we've thrown a rod."
hamtrak 3 months ago
sounds perfect to me.
chris1978nl 4 months ago
is that cebu philippines?
allanz123456789 4 months ago
Lil bit of 2 stroke, n she'll be fine.
chriskeenan1 4 months ago
gay face 0:01..keep pressing 1..lol
adzmin91 4 months ago
@adzmin91 looooooool
Plumasster 4 months ago
i am off to bed
pcfaulkner 4 months ago
its just the engine windmilling
BR75069 4 months ago
those aren't sparks. that's the rear of the outer fan cowl. As the fan rotates you can see parts of the ground and air behind it. That clinking noise is also normal. fan blades are not actually welded, screwed, or nailed into the engine. they have particular slots at the base of each blade that expand and pull as the blade spins faster. the base of the blade that holds it to the shaft of the engine is actually nicknamed "the Christmas Tree" because of how it is shaped and slotted. :-)
AirForceBoy2005 4 months ago 4
@AirForceBoy2005 well said! teach this dumb ass how a turbofan works...
uzipanti 4 months ago
@AirForceBoy2005 very interesting, so when the engine is off and the fan is spinning slowly as in this video the blades are loose? so that means at take off thrust or higher thrust the blades are strong? correct?
houshidar558 4 months ago
@houshidar558 the blades are strong regardless but the centrifugal force (i think that's how you spell it) plays a very key part in that motor's integrity
AirForceBoy2005 4 months ago
@houshidar558 you are correct
AirForceBoy2005 4 months ago
Sounds fine to me.
DavemechL1011 5 months ago
...th' squirrels' nails need trimmin'...
SittingMooseShaman 5 months ago
normal
txgrunt0700 5 months ago
I've been flying for years, its completely normal!!!
Killerbeez10 5 months ago
I'm an A&P (airplane technician) for a major airline and I see and hear this daily in my workplace. The other people who commented here have hit the nail on the head and must also work within the industry. The blades in the fan section of jet engines fit loose in the hub and tighten when under power.Blades are removed and the ends lubed to keep them loose in the fan hub. As for the steam you saw in the aircraft's interior it's just condensation given off by the ACM's (a/c units) They blow COLD!
Fireship1 5 months ago 2
completely normal!!
repi1973 5 months ago
The smaller CF34-8 is also a high bypass fan, and sounds very similar. If I didn't hear this sound, I would have to remove the engine from service for inspection and repair.
RJ9mech 5 months ago
This guy is a freakin DORK! Assuming that the plane is broken.
shmily947 5 months ago
The turbine blades are loose when the engine is at low rpms. They only seat in their mounts at at high rpms. This design prevents excessive vibration buildup leading to cracking and blade loss.
n7275 5 months ago 73
@n7275 Smarty pants!
amac320974 5 months ago
@n7275 Exactly, the US Military C-17 does the exact same thing (proof that this is OK and not a bad engine) but otherwise pretty much every jet engine I have encountered does this to some degree.
DaBodyGuard13 4 months ago
@n7275 Compressor blades you mean. Turbine blades extract the power from the hot exhaust
Sterlingjob 3 months ago
@Sterlingjob No, the compressor blades in this engine(CFM-56 looks like) are fixed to the compressor rotor, the turbine blades are loose. Check out: watch?v=phludDUfakg
n7275 3 months ago
@n7275 There is relavent movement in all blades unless they are fixed at the tips and the sound you hear is the fan blades,.
Sterlingjob 3 months ago
@n7275
Sterlingjob is right n7275
Florian112RE 3 months ago
@n7275 I guess that would explain the noises the youtube user is talking about. I gather you know about these matters better then average, would the apparent sparks be random reflections perhaps?
TheMrbum 2 months ago
@TheMrbum The noises are indeed from the lose turbine mountings. The "sparks" are caused by the digital camera's low FPS, they're only the light from the end of the engine, since it's usually see through, but due to the spinning blades it appears like sparks when filmed with a digital camera.
Trund 2 months ago
@Trund
I'm waving the "bullshit flag". the sound that you hear is the fan blades(which are not turbines) loosely moving up and down in their dovetail slots.
Please research before you boldly make such ridiculous claims
mtrujillo1973 1 month ago
@mtrujillo1973 Yes, you are right. I mixed it up with the first turbojet engines, where the turbine blades were still loose to compensate for the temperature change, whereas in modern turbofan engines the blades are hollow and constantly cooled. My post wasn't exactly ridiculous though, since it used to be the case. After all I'm not an engine engineer anyways, I just try to fly these things as safe as possible. :)
Trund 1 month ago
@n7275 You're right. The centrifuge force places the blades into their correct operating position.
saucierdavid8109 5 days ago
ALL large bypass engines like this particular one make this characteristic rattling
sound when the main fan is rotating slowly.
Their design allows the blades a fairly "loose" fit within their mountings, these
then tighten up as the fan rotation increases due to centifugal force.
They sound like a bag of spanners when they do it, and you can't help but think
"Hold on! That does'nt sound happy!" but it's quite normal.
Unless you see a blade MISSING, then think twice!!!
battleaxe10 5 months ago
CEBU PACIFIC service not good at all, and every time you book online at cebu pacific a lot of hidden charges will be added to your fare....example. manila to kalibo Php 999.00 one way but the end of the booking you make it will cost the total amount of Php 1,738.48 in this amount insurance is included but in this price only hand carry baggage are allowed the 15 kilos baggage is NOT FREE OF CHARGE.this airline is not a budget airline anymore.
otokomai777 5 months ago
I personally have never heard this noise from any jet before.. but there's a good reason for that. Pretty much every jet at a busy airport has it's engines at idle, they rarely ever turn off the turbines completely. In this video you can clearly hear that there is no turbine noise therefore it's off and the blades are rotating freely which could cause this metal clanging noise. It's nothing to be worried about.
Sigrafix 5 months ago
This has been flagged as spam show
shitty face as well as video
tzin1gr 5 months ago
wtf piece of shit engine
plasticspastic201 6 months ago
Thats normal for CFM 56 engines
757mech1 6 months ago
not sparks! probably bad quality video, rain or light shining through engine but not sparks!!!
airplanereplay 6 months ago
change out them there spark plug wires!
dembkomj 6 months ago
The fog or dry ice smoke is only the water in the air condensing/evaporating as the altitude or air pressure changes. As the crew adjusts the air pressure inside the cabin to compensate for the lack of Oxygen and air pressure at the higher altitudes. Hence the need for Oxygen Masks if the cabin were to lose pressure.
mc63100 6 months ago
this normal, because the blades of tne fan on the mounting have the contat gap
syyaroslav 6 months ago
Thts normal..walking past a USAF douglas dc10 at an airshow the same noise was heard..the plane was on display and the wind was spinning the blades in same fashion...MrGermany18 is correct..the blades are loose at low rpm until they spool up and force locks them in place.
janny1983 6 months ago
which airline?
globetrotter0580 6 months ago
those aren't sparks thats just rain!
samthelittleman1 6 months ago
So that's where my 5/16 socket is...!!
e081194eng 7 months ago 62
@e081194eng lmao
Jaysun325 6 months ago
@e081194eng hehehehe :) I thought the same ;)
waddel20 6 days ago
Working to become an A&P, and yup this is normal as the others have confirmed.
2w4e3 7 months ago
normal that is a normal sound when the engine is off in the airbus
mdmarkdaniel46 7 months ago
Ok first of all the engine is either windmilling, or just slowing down after shutdown, and YES THAT NOISE IS NORMAL. Fan blades are held on loosely to allow for expansion of the blades while spinning. Once the fan spins, centrifugal force holds the blades in place. Any other questions?
MrGermany18 7 months ago
I work at FedEx Express Aircraft MX and if that noise was bad every turbine engine I ever worked on is bad, normal noise turbine blades make when coming to a stop.
Austin512Pioneer 7 months ago
thats auto rotation caused by the wind blowing through the blades of the engine
MissThunderPuss 7 months ago
Some says It's the sound of blades cooling off....or wind milling....or disk clanging on their fitting...or turbine blades not locked to wheels....or turbine blades sliding in the mounts.....or shroud contacts caused by low ground wind.....and many other diagnoses.
It also sounds like metal grinding. Most likely it's normal as people say.
But what if it's really metal grinding. It also sounds like this.
One thing is sure, The mechanics won't be on board. The passengers are. lolz...
joypoPHDsoan 8 months ago
Whe the turbine blades cool after flight they do not fill the entire holding bracket so they jiggle around a bit but when the engine starts and runs they heat up expand and lock into place
flyboy152152 8 months ago
@Inkolning. If we were to take your logic in this case. then no 737 Classic or New gen or Airbus A318, 19, 20 or 21 would be flying as we would be constantly making physical inspections for "grinding metal" on every single CFM56 in the world. every single day of the year. Because that IS the sound the CFM makes when it is windmilling. In the meantime they will keep shingling and flying, as long as the trending, analysis, inspections, and indications are normal.
MrAtlanticpingpong 8 months ago
@MrAtlant It can still fly after safety check. The point is you don't put the lives of people on the ears of "Experts". There should be some more safety measures in any form more reliable than "hearing" or instinct of "Experts" These experts, have already killed many people due to simple neglect.
InkoIning 8 months ago
@InkoIning Did you hear about Alaska Airline Crash I think about 10 yrs ago from Puerta Villarta to I think LA. The culprit was Stabilizer Trim, some part was worn out and there were also signs of metal fatigue. Meaning, on prior flights, there should be some indication even a fraction of a point less than normal. But experts, (maybe pilot or mechanics) ruled it as normal. How could this PRIDE be the cause of so many deaths when a simple inspection could have saved lives.
InkoIning 8 months ago
@InkoIning Beleive me, its the instinct and ear of the experts, read aircraft engineers that have saved more live than can be counted.
MrAtlanticpingpong 8 months ago
@MrAtlanticpingpong Of course I acknowledge that Expert ears saves lives maybe 95% of the time. But is human lives worth risking for even 5%?
Again Alaska Airlines, Worn out Jack Screw Stabilizer Trim if I correctly name it. Prior Pilots or maintenance guys must have heard some indication that it was worn out. But the Expert Ears prevailed. A simple inspection could have saved those people.
InkoIning 8 months ago
No sparks, poor quality video.......common sound of that GE engine windmilling. Also, how could an engine NOT under power (off) produce sparks? Sparking implies friction, friction would suggest an engine that would be difficult to move. This video (although poor) clearly shows the fan rotating with the wind freely.....no friction
willztec3 8 months ago
It's so funny to see people get freaked out by things they don't understand.
monkeyboyfoo 8 months ago
@monkeyboyfoo And it's funnier to see people who know nothing pretending to know everything and put on a machismo face.
joypoPHDsoan 8 months ago
@joypoPHDsoan Even funnier when you say things like that to someone who is a pilot and who has worked around commercial aircraft for years.
monkeyboyfoo 8 months ago
@monkeyboyfoo and it's funnier when "Pilots" these days got their degree in Youtube and flew stimulator Boengs 999 and brag about their supposed knowledge.....lolz.
joypoPHDsoan 8 months ago
@joypoPHDsoan Ok buddy, you win. I'll take my two degrees in aviation and my pilots certificate and go now. Good luck with those sims, they seem to be working out really well for you!
monkeyboyfoo 8 months ago
@monkeyboyfoo not a bad idea, I could get one of these Sims whatever they are called and I'll be a Youtube Pilot too. Watch out for my expert opinions in the next few weeks lolz...
joypoPHDsoan 8 months ago
That sound is quite normal for that engine type.
brostraid 8 months ago
Back at Pearl Harbor two private radar operators spotted air crafts in their radars sties. When they reported to the Captain they were told those were the US military planes coming to Hawaii on that day. The privates said it looks like hundreds rather than just a squadron. The Captain replied it happens many times before when he was supervising raddar units in the Pacific and did not look further. The rest is history.
InkoIning 8 months ago
Experts can tell us things and we believe them and our lives depends on them. But friends I've seen experts make horrible mistakes. On my younger days I've worked on a factory and at times the serior Engineers would say the sound or vibrations are normal while just by listening I could tell something isn't right. Some of times I'm correct and we broke down after an hour. By the book that sounds normal but think about hundreds of screws and bolts, something might not be right in there to sound li
InkoIning 8 months ago
@InkoIning lots of mechanics here declared the sound to be normal without even doing physical inspection. One thing to test the knowledge of an expert is to ask him to demonstrate his contention by recreating the formula or composition that produced the challenge sound or vibration. I just hoped that the mechanics at Cebu Pacific really looked into that sound anomaly and not just dimiss it as normal. Common sense tells you some metals are grinding in there.
InkoIning 8 months ago
@InkoIning Common sense dictates here bud
willztec3 8 months ago
looks like someone threw a spoon
ducktopia301 8 months ago
Agreed it's a typical noise made by what appears to be the CFM56 as fitted on the Airbus you were on. The technical name is "shingling" and is caused by the relaxed blade roots of the Stage 1 Fan disk blades clancking around in their fittings. as the fan spins. Still can make you wonder if you're not sure what it is.
MrAtlanticpingpong 8 months ago
i threw a penny in there.
TheEgg185 8 months ago
this is A320
Rami358able 8 months ago
Turbine blades aren't locked into the turbine wheel, instead they are allowed to free--float until they build enough rotational inertia that they seat themselves. The noise is the turbine blades sliding around in their mounts.
n7275 8 months ago
Normal op. worked around jets for over 12 years seen this lots of times
turrtlejet 8 months ago
fail
SnowMonkVX 9 months ago
Yes, that is perfectly normal. I used to design fan blades for Pratt and Whitney. Three quarters of the way out on the big first stage of blades are metal extensions from the blade that are called shrouds. At power, the shrouds fill the gap forming a ring. On the ground, if the wind is right, it will spin the engine low speed spool kind of like a pin wheel. The sound that you are hearing is as one shroud contacts another to close the gap as the blade pass through the 12:00 location (top).
lcdrpost 9 months ago
What your hearing is the blades on the LPT and HPT clicking as it spools down, Due to the fertree method of holding blades...
jamestexas244 9 months ago
lol!
vhonita 9 months ago
thank u for riding cebu pacific
vhonita 9 months ago
its cebu pacific
eurostar131 9 months ago
NORMAL. It's the front fan blades free-wheeling.
anakin101t 10 months ago
Also, If there was something wrong with the engine you would've found out while it was running, trust me. Even tiny imperfections and imbalances show up when a jet engine is running because of how fast it spins. If the fan blades were hitting something or were damaged, you would've felt huge vibrations when the engine was on and the engine would've shook itself apart. Also, sensors in the engine would've let the pilots know of any major problem. -A&P Mechanic and Aerospace Engineer
jetengine7 10 months ago
This is definitely normal. It's just the sound of the fan blades moving around in the hub as the fan windmills.They blades DO NOT hit each other or the fan case as someone else said. I couldn't see any sparks, but I guarantee there weren't any. There is nothing at the front of the engine that could make a spark and the fan blades would not spark even if they struck something because they're made of titanium. It's just light coming through the blades from behind or reflecting off the raindrops.
jetengine7 10 months ago
Normal. engines shutdown. they're only windmilling. normal to all A320s
spyromatt 10 months ago
@spyromatt normal to all turbofan engines
OzoneNighthawx 9 months ago
I Think Someones Thru a Stone In Their
MySu47Berkut 10 months ago
@MySu47Berkut "I think someone threw a stone in there." I generally don't let grammar phase me, especially in YouTube comments, but that was quite egregious.
TheFerruccio 10 months ago
@TheFerruccio What Are You Talking About Boy ?
MySu47Berkut 10 months ago
@MySu47Berkut Don't worry. You wouldn't understand.
TheFerruccio 10 months ago
@TheFerruccio I Know, Because People Dont Get Offended Or Upset If I Forget To Put " And , In My Comment....
MySu47Berkut 10 months ago
@MySu47Berkut Yep, you don't understand. Want me to explain it to you, in more detail?
TheFerruccio 10 months ago
@TheFerruccio Yh Go On Then.... ! :O
MySu47Berkut 10 months ago
This has been flagged as spam show
@MySu47Berkut It's really just a grammar and spelling thing.
"I Think Someones Thru a Stone In Their" should be "I think someone threw a stone in there." The wrong word was used for "someone," "threw," and "there." Also, you're capitalizing every word, which is more than what is found, even, in titles.
TheFerruccio 10 months ago
No sparks that I can see. The clanking is normal. Fan blades fit loosely until it's running.
77bubba00 10 months ago
Another passenger who doesn't know F!!!
elpiloto69 10 months ago
yup, normal sound with wind turn
codekey74 10 months ago
Cebu Pacific is awesome :D dancing flight attednance :P
NightSpiritz 10 months ago
Imagine all the people behind him going "WTF dude.... move!"
SageSofa 10 months ago
It is Half normal and Half Failure
dithpaul1 10 months ago
Cebu Pacific.. lol was once on a flight from MNL to Cebu. Good hospitality.
zsean 10 months ago
the steam/smoke is from the air plane depressureising, the hot,humid air from the Phillipines is coming in thru the air conditioner, causing the steamy effect when it mixes with the air from wherever you came from
xXspartan125Xx 11 months ago
Situation - NORMAL
glenn2226 11 months ago
U heard a strange sound coming from the motor thumps up this comment!
TheFan630 11 months ago
that's a perfectly normal engine ......
TheBabie113 11 months ago
I love this noise, it can make so many people fearfully ^^
by the way, i'm a jet engine mechanic, and yes, it's the mid span shrouds.... ;)
SwissArmyBeach 11 months ago
Its the mid span shrouds on the fan blades making the noise... normal
spiritcrusher923 11 months ago
Nice hat you Tool.
jsaleen17 11 months ago
fuck u fag
11hemas 11 months ago
I dont think so, if that engine is sparking in there, i think its a problem or its the camra
crapmaker117 11 months ago
is it windy that day?
MrForestpotato 11 months ago
That's normal! It's just the blades!
robertjdm 11 months ago
Completely normal.
frankm05 11 months ago
Look at the engine the center swirl is not turning,.....so the engine is not turning the noise is coming from someplace else
maynaed1857 1 year ago
Perdectly normal, nothing to worry about
psrpippy 1 year ago
Normal
MrTahoeBob 1 year ago
Comment removed
Johnny64ism 1 year ago
their is nothing wrong with that Engine it,s just wind milling and the so called sparks is the light shinning thru the engine between the turbin blades..And the spound is just the Blades moving around as the fan turns in the wind..Totally normal
Johnny64ism 1 year ago
WHAT THE FUCK...u people should be destroyed....it was a bad attempt of NOTHING TO SEE HERE AND LETS MOVE ON....po white trash
UFOSPACE1999 1 year ago
This has been flagged as spam show
oh my God! is this Cebu Pacific Air? I use to ride in this airlines...this is scary!!!
nimrodhunter69 1 year ago
This has been flagged as spam show
oh my God! is this Cebu Pacific Air? I use to ride in this airlines...this is scary!!!
nimrodhunter69 1 year ago
oh my God! is that Cebu Pacific Air? I used to ride that airlines...this is scary!!!
nimrodhunter69 1 year ago
Here it all the time in some of our 37's.
av8or757 1 year ago
blades in jet engines are mounted with a little play in order to absorb air vibration
somebody1310 1 year ago
I heard similar clicking but a whole lot louder on a parked Boeing military aircraft with all 4 engines. very normal for the fan(front of engine) to rotate from wind and make clicking
TheCanesVenatici 1 year ago
Windmilling as others mentioned? Yes. As for the noise, Some of the compressor stages on the propulsor section have blades mounted kinda loosely. They have a beveled base that inserts or slides into place. A shim is inserted underneath the base with bendable tabs that holds it in place. There's a bit of play. Think of a minute hand on a clock with too much play in it. When it gets to 12, it flops over to one side. This is the clicking noise.
skyferret1 1 year ago
it is NORMAL...the blades are slightly separated from each other and they to hit so thats whats causing that noise.
58876 1 year ago 19
Like some people say here the clicking sound is the fan blades normaly lose when the engine shut down and turning by wind (Windmilling). Replacing these blades is just simply sliding them out. During startup centrifugal force push them outward like spining a bucket of water. Notting to see here move along lol,
basimpsn 1 year ago
didnt see sparks
andyhasel1998 1 year ago
@angeloinchicago
Thankss
rcsuncon 1 year ago
also- the mist from the overhead is probably condensation from the air conditioning, which, in a humid environment, can really draw out a lot of moisture.
cynon767 1 year ago
@cynon767 Cool thanks for the post. Angelo
angeloinchicago 1 year ago
Another airline mechanic here... yup, normal. That noise is typical windmilling. After watching several times, that looks like light catching on raindrops rather than light from the fan blades.
cynon767 1 year ago 11
@cynon767 Wow, that is a great suggestion, and it makes perfect sense. It was raining and light would easily reflect of water. Thanks for the post. Angelo
angeloinchicago 1 year ago
@angeloinchicago if I may throw in my two cents in here. I don't think it's rain at all. That is a CFM 56 high bypass turbofan. The bypass section essentially bypasses the jet core of the engine and you can see right through it. That is why when the blades are caught in a certain angle with the camera you can see the other side...not a reflection.
atanas747 9 months ago
Normal op. worked around jets for over 12 years seen this lots of times.
turrtlejet 8 months ago
FAIL!!!!!!!!!!!!!!! nyahahaha..
its just a SUNLIGHT!!!!!!!!!(even if it rain hehehe)
to all people out here.. thank you..
just a normal sound..........
well if you really want to know better.. be an aircraft mechanic!
rcsuncon 1 year ago
@rcsuncon LOL great post I appreciate it lol
angeloinchicago 1 year ago
NORMAL!!!!!!!!!!!!!
rcsuncon 1 year ago
@rcsuncon I think you are the first of several hundred comment to use CAPS lol. Thanks for your feedback! Angelo
angeloinchicago 1 year ago
I am an aircraft mechanic with my IA. This is simply the fan windmilling. The "sparking" is nothing more then light shinning through the gaps made by the fan rotating past stator blades. There is nothing there that could spark, the blades are made of a nickel alloy which doesn't spark. The area where the fan could theoretically contact the case is built up composite material. There are no potential sources of electricity that could create a visible arc outside of a buttoned up engine.
MaconMusicFan 1 year ago