Engines/APU Flashcards
What do the N1 instrument red lines indicate?
N1 RPM operating limit
What do the N1 instrument amber lines indicate?
MAX N1
How is the reference N1 displayed?
By the green ‘crows foot’ symbol and green digits
How and where is the thrust reference mode displayed?
Green indication at the top of EICAS
Which three oil parameters are displayed for each engine?
Quantity, temperature and pressure
Where are the oil parameter indications displayed?
MFD secondary engine display
Where is engine fuel flow displayed?
MFD secondary engine display
What indications are given if an N1, N2 or EGT operating limit is exceeded?
Display changes to RED
When are RED indications removed?
When the parameters return to normal range/Red box by the cancel/recall switch
Which engine parameters are displayed on EICAS?
N1, EGT
Which parameters are displayed on the secondary engine display?
N2, FF, Oil press, temp, qty and vibration
What causes the automatic display of secondary engine parameters?
Any of the following:
- Initial power up
- FUEL CONTROL switch to CUTOFF inflight
- Engine Fire Switch is pulled inflight
- Secondary parameters are exceeded
- Engine N2 RPM < IDLE inflight
What will cause the Compact Engine Instruments to display?
Primary and Secondary engine indications are displayed on EICAS in compact format whenever, secondary engine display is either automatically or manually selected to the Lower Centre MFD and the MFD is failed, unpowered or is occupied
What parameters does the compact display engine instrument show?
N1 and EGT, (normal), N2, FF, OIL PRESS, OIL TEMP, OIL QTY, VIB (Digital)
With the EEC switch at NORM which parameter is used to control thrust?
N1 RPM
When the EEC is selected to ALTN will the engine power increase?
The alternate schedule provides equal or greater thrust
When the EEC is selected to ALTN will the engine exceed the maximum rated thrust if the thrust lever is selected fully forward?
Yes
If the EEC reverts to the SOFT ALTERNATE mode does the Autothrottle disengage?
No
Which other parameters does the EEC power?
N1 and N2 overspeed
Which conditions select the approach (high) idle speed?
Any of the following:
- Engine anti-ice on
- Flaps at 25 or greater
- Flaps away from UP and an air driven hyd demand pump inoperative
- Opposite engine bleed are valve closed
Which fuel valve will open when the fuel control switch is put to run with Autostart ON?
Spar valve
Which fuel valve will open when the fuel control switch is put to run with Autostart OFF?
Spar and engine valve
What normally supplies air for engine start?
APU bleed air
During a ground start sequence when does the ignition start for autostart?
At the appropriate N2
During a ground start sequence when does the ignition start for manual start?
Fuel Control Switch to RUN
What action opens the air starter valve?
START/IGNITION selector to START
How many igniters does each engine have?
Two
What selects which igniter is used?
The EEC
With the Engine Start Selector at CON when is ignition operated?
In flight, both igniters operate continuously. On the ground, both igniters operate continuously if the flaps are set for takeoff and N1 is above c.55%
When is the auto-relight function active?
When a rapid decrease in N2 occurs, or N2 is less than idle
How are the thrust reversers actuated?
Hydraulically
Can reverse thrust be selected in flight?
No
Can reverse thrust be selected if the thrust lever is away from idle?
No
Where is the reverser positon indication displayed?
Above the N1 indication on EICAS
What does amber REV indicate?
Reverser in transit
What does green REV indicate?
Reverser fully deployed
Where is the vibration indication displayed?
MFD secondary engine display
What does the vibration display indicate?
The highest vibration level: N1, N2 or BB (Broadband)
Will the vibration indications display automatically if vibration rises into a high range?
Yes
Where is the inflight start envelope shown if an engine is shut down in flight?
EICAS display
What alert is displayed on the PFD if actual thrust is less than commanded?
ENG FAIL Time Critical Warning
What other indications are there of less than thrust commended?
Voice annunciation “Engine Fail”, and the Master WARNING lights illuminate
What is the airspeed range where the less than commanded thrust alert is active?
Between 65 knots and 6 knots prior to V1
What conditions would trigger the EICAS caution alert ENG THRUST (L/R)?
- The engine is producing less/more than the commanded thrust
- Actual thrust is not satisfactorily increasing to commanded thrust
- Airspeed is V1 - 6 knots or greater
To what height can the APU bleed air be used?
22,000ft
Which of the APU outputs has priority?
Electrical power has priority over bleed air
With no AC power available what will give fuel pressure for the APU?
DC pump
What indication is given when the APU is running?
APU RUNNING (memo message)
What indications are given if the APU automatically shuts down?
EICAS: ‘APU SHUTDOWN’ (advisory)
What puts the APU into ‘ATTENDED’ mode?
Either engine is running or starting, OR when in flight
In ‘ATTENDED’ mode, if a fault occurred but the APU continues to run, what indication is given?
EICAS ‘APU LIMIT’ (caution), Master Caution lights, Beeper
