E190 - Engine Flashcards
Which engines are installed ?
Two GE CF34-10E engines.
Each FADEC incorporates how many channels ?Is the FADEC part of any of the MAU’s ?
2 channels.No.
What happens if you turn the engine START/STOP selector to STOP ?
Commands the FADEC to shut down the engine, provided that the thrust lever is in IDLE.
What happens if you turn the IGNITION switch to OFF on the ground ? In flight ?
On ground: Deactivates ignition. FF is also inhibited.In flight: The switch is disregarded in OFF.
Is ignition provided through the igniters if the IGNITION switch if OVRD and the engine is NOT running ?
No.
What is the meaning of an amber REV indication ?
Reverser in transition.
What is the meaning of a red REV indication ?
discrepancy between selected and actual reverser position.
Is the OFF flag shown on the N1 dial if the engine is shut down on the ground ?What is shown for an engine failure in flight ?
No, only in-flight, by pilot action. The FAIL flag.
When is the ITT red line shown ?
Until the end of the takeoff phase, OR in-flight if the ITT goes above the CON thrust limit.
What is the meaning of the WML icon ?
The FADEC has detected a flame-out and the auto re-light system is restarting the engine.
Is it possible to have a red VIB indication ?
No. Only green or amber (4.0 - 5.0 units)
How is fuel routed from the tank to the engine ?
Ejector fuel pump - LP pump - THEN
- HP pump - fuel tank, OR
- Heat exchanger - HP pump - FF - FMU
The engine oil pump contains how many pumping elements ? Which ?
5 pumping elements:1 supply pump and 4 scavenge pump elements.
The engine oil filter incorporates:
A filter bypass and a cold start relief valve (for high viscosity oil during cold engine starts).
The pneumatic engine starting system consists of:
- Air turbine starter (ATS)- Starter control valve (SCV)
How are the igniters powered ?
Igniters A - SPDA 1 OR EICCIgniters B - SPDA 2
How many igniters are energized for an engine start on the ground ? In flight ?
1 igniter on the ground, both igniters in-flight.
What is the sequence of an engine ground start?
- 7% N2 - ignition- 20-25% N2 - fuel- 50% N2 - starter cut-out
What is the FADEC sequence for a wet engine start ?
If there is no light-up within 15 sec, fuel and ignition are turned off. The engine is motored for 30sec, then another restart is attempted with both igniters. If no engine light-up occurs, the start should be manually aborted.
What is the sequence of an engine x-bleed start?
- 7% N2 - ignition- 20-25% N2 - fuel (OR after 15sec if N2 < 15%)- 50% N2 - starter cut-out
What is the sequence of an engine windmill start?
- 7% N2 - ignition- 7,2% or 15sec (whichever earlier)- 50% N2 - starter cut-out
Does the FADEC give start-protection in-flight ?
After how many seconds should the engine start be aborted in-flight if there is no light-up ?
No.After 30 sec.
On the ground, auto-relight is terminated and fuel is shutoff is N2 falls below :
52% N2.
The locking system of the reversers (per engine) consists of:
2 actuator locks + 1 cowl lock
Is it possible to select reverse thrust the first 30sec after an engine failure is detected ?
Yes. (RTO !)
Is it possible to immediately have MAX REV upon landing ?
No. IDLE REV is commanded first, until the thrust reverser cowls are fully deployed. Then MAX REV is commanded.
If a reverser is failed, what happens if you:- select both reverser at MAX REV ?- select only the operative reverser at MAX REV ?
- IDLE REV- MAX REV for the operative reverser.
What happens with the engine thrust in case of uncommanded thrust reverser deployment ?
Idle thrust is automatically commanded.
How is the FADEC powered ?
Above 50% N2 by the PMA (permanent magnet alternator). Below 50% N2 power is provided by the eletrical system.
When is the ATTCS armed during G/A ?
Whenever thrust mode is GA.
When does the ATTCS command RSV automatically ?
ATCCS engaged, T/L at TOGA AND:
- Engine failure during T/O or G/A, or
- Windshear, or
- N1 difference > 15%
When does the ATTCS command RSV manually ?
ATCCS engaged and T/L at MAX
When is idle thrust increased in icing conditions ?
When FLIGHT IDLE or APPROACH IDLE is active, but NOT for FINAL APPROACH IDLE.
When is approach idle active ?
- < 15,000 ft- Gear down- Any flaps selected(- In-flight)
When is final approach idle active ?
- < 1,200 ft- Gear down- Landing flaps
At V1 - 15 kts the ITT redline changes from:
Max ITT for the selected T/O thrust mode to max ITT for TO-1 RSV.
What happens if N2 > 102 % ?
An engine shutdown is commanded.
What happens in case of three consecutive engine overspeed detections within 30sec ?
The FADEC will not relight the engine (if the engine fails).
The FADEC provides ground engine start protection against:
- hot start- wet start (no light-up)- hung start
Does the FADEC control the ITT limits ?
Yes.
Above which ITT will the FADEC not allow fuel flow during ground start ?
Above 120 deg celsius.The SCV will be commanded open, but fuel will only be supplied when the ITT drops below this temperature.
