Powerplant Flashcards
What powers the FADEC?
- below 50% N2 the aircraft’s electrical power
- above 50% N2 the accessory gearbox alternator
What is on the engine accessory gearbox?
- engine lubrication pumps
- fadec alternator
- hydraulic pumps (EDP1 & EDP2)
- engine fuel pump and fuel metering unit (FMU)
- integral drive generator (IDG)
- air turbine starter (ATM)
- integral oil reservoir
What conditions are required to enter flex power?
- thrust levers in idle or shutoff detents
- WOW for at least 1 minute
- assumed temp greater than actual temp
- air speed less than 65 knots
What is used to synchronize the N1 and N2 systems?
The fadec
How is fuel heated?
A fuel to oil heat exchanger
How long will the FADEC maintain landing idle?
5 seconds after weight on wheels if thrust reversers are not activated
When is APR activated?
Mismatch of 15% N1 or greater
What automatically calculates the target thrust rating?
FADEC, whenever electrical power is applied to the aircraft
On takeoff roll when does the FADEC lock in the takeoff thrust value?
At 65 knots
When is the FADEC thrust calculation unlocked?
When altitude exceeds 400 feet AGL or thrust levers are moved from the TOGA positions
How can assumed temperature be cleared?
Entering an assumed temperature of -100°C
When can the N1 and N2 be synced?
- Thrust levers in cruise
- right N1 within 1.5% of the left
- right N2 within 7.5% of the left
Which engine is designated the master for syncing?
Left engine
How much thrust does the bypass air generate?
80%
How much thrust does the core air generate?
20%
