Flashcards in Engines Deck (18):
What does the START/STOP selector knob in the STOP position do?
Commands the FADEC to shut down the engine
What does the WML icon indicate
What does the OFF position on the IGNITION SELECTOR KNOB accomplish
Deactivates the ignition. Fuel flow is inhibited on the ground. FADEC disregards the OFF position in flight.
What does AUTO position on the IGNITION SELECTOR KNOB accomplish?
FADEC continuously activates both igniters while the engine is running
On the IGNITION SELECTOR KNOB, if placed in the OFF position in the air, what happens to the igniters?
They continue to work as FADEC disregards this switch position in the air
On the IGNITION SELECTOR KNOB, if placed in the OFF position on the ground, what system logic is there?
On the ground, fuel flow is inhibited
When is the N1 wing anti-ice cyan line displayed?
Only in icing conditions below 1200 AGL with the landing gear down or flaps extended.
What type of start malfunctions are there?
No Light Off
START VLV OPEN
No Oil Pressure
Describe the flow of fuel
Fuel leaves the fuel tanks and flows through the low pressure fuel pump and then divides into two paths. One flows through the high pressure fuel pump and returns to the tank as motive flow. The second flows through the fuel / oil heat exchanger to the fuel filter, the FMU, then through the high pressure fuel pump before returning to the FMU.
How is the SCV - Starter Control Valve opened?
By the FADEC. The FADEC opens and closes the SCV
How many igniters are energized during engine starts?
One for engine starts on the ground
Both for inflight engine starts
What does the OVRD position of the IGNITION knob accomplish?
Both igniters on each engine are energized
When should the start be manually aborted?
When there is no light off within 30 seconds
No Oil Pressure
Is there start protection logic for inflight engine starts?
There is no protection during inflight engine starts for
Failure to light off
The ATTCS automatically commands Reserve Thrust when?
When it is engaged
Thrust Levers are in TOGA and one of the following:
N1 split of 15%
Engine failure on takeoff
engine failure during go around
Wind shear detection
When does the FADEC automatically command an engine shut down?
When N2 reaches 102%
Will the FADEC attempt to relight an engine automatically in the event of an overspeed?
In the event of 3 consecutive overspeed detection events within 30 seconds, the FADEC will not relight the engine