Engines/APU Flashcards
The maximum altitude the APU can be used for Pack operation is _____.
22,000 feet
If AC power is not available, the DC pump in the ______ tank provides APU fuel.
left main
If the APU starts automatically in flight, it _____.
can be shut down by positioning the selector to ON, then OFF.
With AC power available, and the APU selector to ON, the _______ and cannot be turned off on the ground.
left forward fuel pump operates automatically
What occurs when the APU selector is turned to OFF?
Initiates normal shutdown.
Oil pressure, temperature, and quantity are ______.
displayed on the secondary engine display
The START/IGNITION selectors control the ______ and provide continuous ignition capability.
starter air valves
During takeoff, the EGT indication is _____.
often in the amber band
What does the autostart system NOT monitor during engine start?
Oil pressure and oil temperature
How does the EEC shift from NORM to the soft alternate mode of operation?
If the required signals are not available to operate in the normal mode
The ALTN mode of EEC operation provides _______.
overspeed protection
In the alternate mode, the EEC uses _____ as the controlling parameter.
N1
During a ground Autostart with the FUEL CONTROL switch in RUN, at the appropriate ______ the engine valve opens and the ignitor(s) energize.
N2 RPM
How many starters does the APU have?
Two, one electric and one air turbine
In flight, the APU will automatically shut down with no cool-down period for ______.
an overspeed
How can pilots be certain that the APU is operating normally?
The message APU RUNNING is displayed on EICAS.
(Regarding the Thrust Reverser System)
The EECs also provide thrust limits protection in which mode?
Reverser operation
Secondary engine indications are automatically displayed when _______.
the fuel control switch is moved to CUTOFF in flight
If the EGT limit is exceeded during an inflight engine restart, ______.
the start is temporarily discontinued.
The normal power source for engine ignition is main AC power. The backup source for ignition is ______.
standby AC power
During an inflight engine autostart, if the EGT limit is exceeded, the _______.
start is temporarily discontinued to allow engine cooling; however, the autostart is not aborted
Forward throttle movement is mechanically restricted until _______.
the reverse thrust lever is fully down.
On the ground with the engines not running, the APU shuts down with no cool-down period if which of the following occurs: _____.
APU controller failure
Engine failure WARNINGs occur when the engine produces less than commanded thrust ______.
during takeoff below 400 feet radio altitude and between 65 knots and 6 knots less than V1.
An auto-relight is initiated anytime a flameout is detected. A flameout is detected by the EEC when ______.
N2 is less than idle RPM
During an inflight engine start, how does the EEC interact with the ignitors?
it selects both ignitors
During a ground engine start, what action does AUTOSTART perform?
It may abort, and then re-initiate the start.
With Autostart switch selected OFF, the spar and engine fuel valves open, allowing fuel flow to the engine, when the _______.
engine fire handle is in, and the FUEL CONTROL switch is in RUN
How would you know that the EEC had switched to the soft alternate mode (200A/B)?
EPR indication is blank
The NORM mode of EECs (200A/B) operation provides _______.
thrust limit and overspeed protection
On the ground, the autostart system will attempt a maximum of _______ start(s) (200A/B)
2
APU fuel can be provided by _____.
any AC fuel pump supplying fuel to the left fuel manifold
In flight, the APU automatically starts regardless of APU selector position under which of these conditions?
Loss of power to both AC transfer busses.
When the START/IGNITION switch is in the NORM position, continuous ignition is automatically provided _______.
with the flap lever out of the UP position
The EEC automatically selects approach idle when _______
flaps are commanded to 25 or greater
The autostart system will attempt a second start for all the following conditions EXCEPT for ___
insufficient air pressure
The autostart system will not attempt a second start on the ground if _______
there is no N1 rotation
The main airplane battery powers the APU _______.
inlet door, fuel valve, and fire detection system
The APU continues to operate in the attended mode and the EICAS message APU LIMIT displays for a ______ fault.
high EGT
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