For anyone interested, we first start engines 3 & 4 simultaneously, then 1 & 2. When the APU is inoperative we will start the engines singly 4, 1, 2, 3 using a ground air source for the first engine then use cross bleed on the other 3.
I'm sure it takes too much energy from the APU to start all 4 at once, plus it's also safer to do one at a time, so if something were to malfunction during startup of the engine, they know which engine it could be and abort the startup!
No speedbrakes on landing?
thejetdrvr 3 months ago
For anyone interested, we first start engines 3 & 4 simultaneously, then 1 & 2. When the APU is inoperative we will start the engines singly 4, 1, 2, 3 using a ground air source for the first engine then use cross bleed on the other 3.
744captain 3 months ago
Spectacular video!!!!!!!!!!!!
tbird209 9 months ago
I'm sure it takes too much energy from the APU to start all 4 at once, plus it's also safer to do one at a time, so if something were to malfunction during startup of the engine, they know which engine it could be and abort the startup!
dummerdrummer 1 year ago
@MrSchumacher why dont they just start all four at once?
FutureMarine246 1 year ago
@jetfreak4
Allot of 747-400 operators do that.
MrSchumacher 1 year ago
Does Delta always start two engines simultaneously on each wing?
jetfreak4 1 year ago
F****** Awesome!
jonahair747 1 year ago