Barking Airbus A320 on Finals into AMS

Here is an actual recording of "the barking A320". I have read about this before and supposedly it is caused by the PTU on engine start-up or shut-down, as you will notice with this video however the aircraft in nowhere near that point.The "barking" starts at 02:06. I asked the cabin crew if there was a dog in the pit and they said no. They just said they always hear this sound on this aircraft. Any suggestions?

Category:

Autos & Vehicles

Tags:

• A321
• final
• approach
• a320
• laotg
• ams
• ils
• ptu
• barking
• Airplane
• airbus
• mariah
• carey
• touch
• my
• body
• sexy
• killers
• u2

[djrk84]

@laurenlollie Its a dog without question. Airbus have been using dogs for years on the A320 as back up to the hydraulic system during landing.

[djrk84]

@BobCassidy Woof

[travelplus1]

On one flight the pilot said I've got the Dogs covered they are nice and warm down there not to worry when you hear them bark while taxing to and from the gate lol.

[besmith51]

The only necessary explanation why these hydraulic pumps "bark" is: "It's French."

[TheAbc1234512345]

Hydraulics probably

[thegreatRDU]

Looks like an autoland

[HeroshiKurashiwa]

its the hydraulic valve and pumps that control the rudder i think.. and why it's exclusive on A320s, that's because their parts are different from other planes.

[ballebanan]

Why is this exclusive to the A320 family? Well, I never heard anyone mention it happening on A330/340/380, so I assume it is. Boeing planes don't seem to have this "feature" either .  :P

[Sterlingjob]

@joshieperson777 The PTU will work when there is either a 500 PSI difference between green and yellow systems, low reservoir pressure, low reservoir fluid contents and high fluid temperatures. You shouldnt really hear it during flight control movements, but obviously when the gear is operated as its a heavy system user.

[Sterlingjob]

@joshieperson777 Hydraulic fluid does not move from system to system, they are all separate.

[scotplane]

@LegendxHD I've heard it just after taking off while climbing. It was back when I only just started to get interested into aircraft, so I was a bit worried.

[ollo1982]

LAOTG: The PTU can start anytime during startup,taxi,takeoff;flight; descent,landing and engine shut down. Have heard alot of times on takeoff,with A320 and A321. The PTU is a power transfer unit,that build up the pressure when it drops blow a certain point. If left hyd.system drops below its needed point PTU transfer power from right system to the left system. So its quite common to hear the PTU at all stages during a flight :D PTU on airbus A320 family have this "barking dog" sound.