Powerplant Flashcards
- How is nose cone de-iced?
Nose cone has a rubber tip that distorts for ice shedding.
- What accessories are mounted on the engine?
Breather, fuel pump, Fuel Metering Unit (FMU), hydraulic pump, Integrated Drive Generator (IDG), oil tank and pump, Permanent Magnet Alternator (PMA), and starter.
- How is oil filling accomplished?
By conventional gravity filling or through remote replenishing system.
- When does EEC channel transition from A to B, or B to A?
When FUEL CONTROL switch is positioned from RUN to OFF.
- What’s the only time you’re completely FADEC protected during start?
On the ground.
- What can you consider if starter air valve fails to open?
It has a manual override.
- What is rotor bow or thermal bowing?
LP and HP shafts warp or bow due to asymmetrical cooling after shutdown.
- During what mode would the EEC energize both igniters and schedule fuel flow until rpm stabilizes?
Auto relight
- What mode provides auto relight if FUEL CONTROL switch is selected to OFF and then back to ON within 15 seconds?
Quick relight
- Which component, driven by accessory gearbox, is dedicated source of power to EEC when the engine is running?
Permanent Magnetic Alternator (PMA)
- What are some benefits of FADEC?
Engine protection, improved handling, better fuel efficiency, and prolonged engine life.
- How can autothrottles be disconnected?
Push either quick disconnect switch, toggle either engage/disengage button, or manually adjust throttles.
- What’s the purpose of hold mode on takeoff?
Any changes in bleed air are ignored by EECs which prevents EPR changes during takeoff roll, rotation, and climbout to 400’ AGL.
- When do engines go to approach idle?
Flaps > 22
- Which AT auto-engage conditions can be inhibited?
Vertical mode change: other reasons are safety related (i.e., during EDM, speed protection, and for FLCH mode descending through 2000’) and cannot be inhibited.
- When is MCT authorized for use and for what time limit?
It’s intended for infrequent use at pilot discretion and available without time limit.
- Describe smart TO/GA feature.
When smart TO/GA button selected, Reduced Go Around (RGA) flight mode annunciation displays unless single engine or high altitude operations, flight director commands 5° FPA / 160 knots, and FMS sequences to missed approach procedure.
- What’s the caution associated with selection of ENGINE CONTROL switches to ALT?
Move affected engine power lever to midrange to avoid a thrust bump.
- Describe thrust reverser operation.
Electrically controlled and hydraulically operated.
- REV appears inside LP gauges during thrust reverser operation. Describe color indications.
White for in transit, green for full deployment, amber for umcommanded deployment on ground, and red for uncommanded deployment inflight.
- What happens to the engine during uncommanded thrust reverser deployment?
FADEC commands engine to idle.
