Engine Flashcards
Engine
BMW/Rolls Royce BR715-A1-30 High-Bypass turbo fan Engines
23,000 Pounds Thrust
18,500 Pounds Thrust at “gate”
FADEC components
Throttles, Throttle Module, EEC
Auto Start system aborts for:
1) Fuel on conditions not being satisfied
2) Hung Start)
3) No Starter cutoff w/in 3 minutes
4) Hot Start
5) Loss of valid N2 input
Ignition Switch
Auto:
On:
Auto: selects an auto start sequence
On: Selects a manual ground start sequence, provides continuous power to igniters.
In Flight Auto or ON positions - both igniters during start
Auto Start will not start if:
also manual start parameter
not motored for at least 30 seconds
if TGT is >150C
Max Motoring:
N1 indication usually occurs around 26% N2 if no N1 observed, use Max motoring N2.
Max motoring achieved when N2 stabilizes above 19% and positive rotation (counter clockwise) observed by Line Servicemen.
Take Off Power limitation
5 minutes
10 minutes for single engine
TGT limit for start
700C
Engine start switch de-energizes
39% N2