Engines And APU Flashcards
What does the autostart system NOT monitor during engine start?
Oil pressure and oil temperature
The maximum start EGT for 4077D and 4090-3 engines is
535C
The maximum start EGT for the 4077 engine is
535C
The NORM mode of EECs operation provides
Thrust limit and over speed protection
How does the EEC shift from NORM to the soft alternate mode of operation?
Automatically with a system malfunction
The EEC automatically selects approach idle when
Flaps are commanded to 25 or greater for a two engine approach
An autorelight is initiated anytime a flameout is detected. A flameout is detected by the EEC when
N2 is less than idle RPM
The autostart system will attempt a second start for all the following
conditions EXCEPT for
Insufficient air pressure
On the ground, the autostart system will attempt a maximum of _____
start(s).
2
During inflight engine start, how does the EEC react with the igniters?
It selects both igniters
The ALTN mode of EEC operation provide
Over speed protection
The autostart system will not attempt a second start on the ground if
the is no N1 rotation
The deployment of thrust reversers is
Prohibited in flight
In the alternate mode, the EEC uses _____ as the controlling parameter.
N1
If the EGT limit is exceeded during an inflight engine restart,
A manual start is required
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
Other than for engine start, oil quantity
Has no certified low limit
The normal power source for engine ignition is main AC power. The backup source for ignition is
Standby AC power
During a ground engine start, what action does AUTOSTART perform?
It may abort and then re-initialize the start
The EEC provides overtemperature protection
During auto start on the ground and in flight
During an inflight engine autostart, if the EGT limit is exceeded, the
Start is temporarily discontinued to allow engine cooling; however, the auto start is not aborted
Forward throttle movement is mechanically restricted until
The reverse lever is fully down
Which of the following is an indication that the thrust reversers are fully deployed?
REV above each digital EPR indicaron changes to green
Engine anti-ice ON (automatically or manually selected) supplies bleed air to the engine cowl and _____ for the associated engine.
Continuous ignition
In the normal EEC mode, the EEC sets thrust by controlling
EPR
Oil pressure, temperature, and quantity are
Displayed on the secondary engine display
What is the certified low oil quantity limit?
There is no certified low oil quantity limit
Regarding the Thrust Reverser System, the EECs provide overboost protection in which mode?
Reverse
The EECs are powered by
Dedicated engine mounted permanent magnetic alternators (PMAs)
The START/IGNITION selectors control the _____ and provide continuous ignition capability.
Starter air valves
When starting an engine in flight, the START/IGNITION switch in the NORM position operates
Both igniters continuously with the flap lever out of the UP position
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
During takeoff, the EGT indication is
Often in the amber band
How would you know that the EEC had switched to the soft alternate mode?
EPR indication is blank
Secondary engine indications are automatically displayed when
The fuel control switch is moved to the CUTOFF in flight
Engine failure WARNINGs occur when the engine produces less than commanded thrust
During take-off below 400 feet radio altimeter and between 65 knots and slightly less than V1
Secondary engine indications are automatically displayed when
A secondary engine parameter is exceeded
The maximum altitude the APU can be used for Pack operation is
22,000 feet
How many starters does the APU have?
Two, one electric and one air turbine
The main airplane battery powers the APU
Inlet door, fuel valve, and fire detection systems
In flight, the APU will automatically shut down with no cool-down period
An over speed
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
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 shutdown by positioning the selector 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
In flight, the APU automatically starts, regardless of APU selector position, under which of these conditions?
Loss of both AC transfer busses
APU fuel can be provided by
Any AC fuel pump supplying fuel to the left fuel manifold
The APU continues to operate in the attended mode and the EICAS message APU LIMIT displays for the _____ fault.
High EGT
How can pilots be certain that the APU is operating normally?
The message APU RUNNING is displayed on the EICAS
