Powerplant Flashcards
During a normal engine start, ignition icons will be seen when the pilot completes what action?
Move the fuel control switch to RUN
What should be accomplished if engine vibration levels exceed 0.60HP or 0.60LP?
Engine thrust should be reduced, and possibly shut down the engine if other parameters are abnormal.
When will the FADEC automatically accelerate the engine to high idle speed?
When flaps are selected to 39
IDLE CONTROL - HIGH IDLE:
- Flaps > 22
- Landing Gear Down
- WoW in the air
- Remains in high idle for 5 sec after landing
What will happen in the unlikely event that a thrust reverser deploys in flight?
The FADEC will command idle fuel flow, and the power lever will remain in its last position until moved by the pilot.
What is the procedure for starting an engine with a tailwind in excess of 10 knots?
Crank the engine to maximum cranking HP RPM and verify LP RPM rotation before selecting the fuel control switch to RUN.
If TGT exceeds the maximum permissible value during an engine start, what action will be taken by the FADEC?
On the ground the start will terminate automatically (provided the start master switch is used), and in flight the start will continue.
Where are the standby engine instruments displayed?
On the standby engine instruments page of MCDU1, selected from the MCDU “MENU” page
Which system(s) hydraulically power the left engine thrust reverser?
Left hydraulic system only
What is the maximum TGT indication prior to an engine start?
Check that the residual TGT is < 200C
How can the residual TGT be reduced prior to engine start?
Perform an engine cranking cycle, or allow the engine to crank longer during a normal engine start cycle
What is the minimum bleed air pressure required prior to an engine start?
28 psi minimum
Will an engine start if the power lever is not at idle?
Yes, and amber “L or R THROTTLE CONFIGURATION” CAS message will illuminate, and the engine will accelerate to the thrust setting selected by the power lever
If peak EVM values exceed the alert level during engine start, what action must be performed?
Normally no action is required, this condition is usually normal
What are the indications if the FADEC detects an anomaly during start?
The start will be aborted and an amber “AUTOSTART ABORT” CAS will be displayed.
How is the FADEC reset and the “AUTOSTART ABORT” CAS message cancelled?
By selecting the START MASTER to OFF, or selecting the L/R FUEL CONTROL to OFF
When should the SVO and IGN indications extinguish after start?
Approximately 44% HP RPM
When should the engine oil be checked?
5-30 minutes after engine shutdown.
What are the engine starter duty limits?
3 minutes ON, 15 sec OFF for 3 start attempts, then wait 15 minutes before the next start attempt
What will cause a blue “START SWITCH CONFIGURATION” CAS message?
Depressing both MASTER CRANK and START switches at the same time
What will produce an amber “THROTTLE CONFIGURATION” CAS message?
Throttles not in the idle position prior to engine start
What does it mean if a blue “L or R ALT CTRL” CAS message is illuminated prior to engine start?
The engine(s) have switched to ALTERNATE (LP) control mode
How is the FADEC system switched back to the normal mode if it has been switched to alternate control?
Select the Sensor page on the display controller, then select ENG DATA and deselect L or R ENG ALT CTRL
Can the aircraft be dispatched with engine(s) in alternate control?
No, a valid EPR signal is required for both engines
In a tailwind condition, why is it important to verify positive LP RPM prior to selecting the fuel control switch to RUN?
The FADEC can only sense LP RPM and cannot tell the difference between positive or negative LP RPM
If after starting both engines, the right pack is OFF and the isolation valve is OPEN, what is the most likely cause?
The START MASTER switch is still selected ON
What are the correct indications for an engine vibration monitor test (ENG VIB MON)?
An amber “ENGINE EXCEEDANCE” CAS and EVM indications between 1.80 and 2.20
What is the normal power source for the FADEC and when does it automatically turn on?
It has its own dedicated power source (permanent magnetic alternator - PMA) that operates > 35% HP RPM
What is the LP RPM that is to be avoided on the ground (keep-out zone)?
60-72% LP RPM
What are some items that can cause the IGN icons to come on automatically (without continuous ignition switches on)?
Normal engine start, excessive rain in-flight, or if the FADEC senses an engine malfunction or failure.
When is an engine start FADEC-protected?
When using the START MASTER switch, on the ground only
On landing, the thrust reversers should be in the idle position by what speed?
60 kts
What is the maximum crosswind component for engine start?
25 kts
What is the maximum tailwind component for engine start?
25 kts
What are the methods of engine air-starts?
Windmilling air starts only.
What is a limitation concerning static ground run?
While the airplane is static on the ground, stabilized engine operation in the band between 60-72% LP RPM (fan speed) is prohibited. Any acceleration through this band must not exceed 10 seconds.
How long should the engines be run at idle or taxi power prior to takeoff?
5 minutes
