Engines and APU Flashcards
When would you use “rich” when starting a RR engine?
When ITT reads 0°
On an RR Engine is N2 protected?
NO, it just spins as a result of N1 and N3, it is indirectly protected though them
RR Engine EEC Controls
- EPR-
- N1-
EPR- “Supervisory”
N1- “Limiting”
How are the RR engine EECs powered?
Dual dedicated generators which are really one generator with dual channels
RR Engines- If you lose both channels that power the EECs how do you control the engines?
You revert to hydro-mechanical N3 fuel control
How are the EECs powered on the P&W Engines?
Dedicated PMAs
Is there a mechanical backup to FADEC on the P&W Engine?
No
If both FADEC Channels fail what will the engine do?
Go to min flow FOR THAT ALTITUDE
**If you descend, the engine my shut down b/c of fuel flow
Which is the primary FADEC channel on the 763?
A or B
Neither, it swaps on each start
What powers the EECs on the GE Engines?
Permanent Magnet Generator
IF both FADEC Channels fail on the GE Engine what happens?
A controlled engine shut down
How do we know when engine indicators are coming from the Thrust Management Computer?
It will be displayed in Green
EECs vs ELCs
Which is a bigger deal and what do they do
EEC is a bigger deal- controls and monitors more things
ELC is a protection and a limit
RR Engine
EEC what does it control and is it protection or limit?
EPR and is a PROTECTION -is supervisory
RR Engine
ELC what does it control and is it protection or limit?
N1 and is over speed LIMIT- plays a limiter role
RR Engine
N3 what does it control/ protection or limit?
Is fuel control. if you lose both EECs and ELCs you still have mechanical linkage to N3 fuel protection
Do P&W Engines have ELCs?
No ELCs at all
What Batteries do we need to start the APU?
Both- APU battery starts the APU, main battery powers fire protection
When starting the APU, why do you get Fault, Run, Run?
Fault- Fuel valve opening
Run, Run- Self test and starter engaging
When are EPR Gauge carrots Magenta?
When in VNAV mode
When is “Go Around” automatically bugged on the EPR gauge?
Glideslope capture or flaps set to landing position
What are the engine warm up times?
- Three minutes if shut down for less than 1.5 hours
- Five minutes if shut down for more than 1.5 hours
- GE engine-no warm up
If initial level off is 3000’ or below what could be used for initial climb?
FLCH (speed)
FM 3.90.60-low altitude level off
What winds does Recommended Cruise Alt (ON FMS Cruise page) use?
Real time winds so if winds are more than 30° or 30 knots from planned use this instead of flight plan winds and altitudes
