Power Plant Flashcards
How is nose cone de-iced?
By a number of bleed air holes around the
tip of cone
What accessories are mounted on the
engine?
H-hydraulic pump
O-oil pump and tank
P-permanent magnet alternator
F-fuel control unit
I-integrated drive generator
B-breather
What’s the meaning of engine oil
shutdown quantity?
It’s a ten (10) minute after shutdown
snapshot quantity
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. Note:
ground - air - ground transition also req’d.
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?
N1 and N2 shafts warp or bow due to
asymmetrical cooling after shutdown
During what mode would the EEC
energize both igniters continuously at
high spark rate and schedule fuel flow
until rpm stabilizes?
Flameout detection
What mode provides auto relight if
FUEL CONTROL switch is selected
to OFF and then back to ON within 20
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?
P-prolonged engine life
I- improved handling
B- better fuel efficiency
E- engine protection
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 N1 changes during
takeoff roll, rotation, and climbout to 400’
AGL
Under what conditions will drag
devices be required for descent?
WAI on and TAT < 0°C
When do engines go to approach idle?
Gear extended or flaps 39°
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
When does TO/GA power change to
MCT thrust?
As altitude and forward speed increases;
TO/GA is available within takeoff
envelope
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 N1 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
