Engine Flashcards
Which Engines are installed on the airplane?
General Electric – GE Passport 20-19BB1A (High Bypass 5.6:1).
How much Thrust the Engines supply at Sea Level?
18,920 lb of thrust at Sea Level up to 30°C (ISA + 15°C).
What is the ITT for Ground & Air Start?
- Ground: 750° C / Air: 875°C.
- Quick Windmill Relight: 975°C.
- Note: Max Continuous/Idle: 995°C.
Max Takeoff: 1,035°C.
Max Go-Around: 1077°C (15 seconds).
What are the Engines Takeoff Thrust Limitations?
- Takeoff Thrust OEI: 10 minutes.
- Takeoff Thrust AEO: 5 minutes;
How does the pilot know when the engine limitations have been exceeded?
The Numbers turn Red on EICAS.
What are the Engines Duty Cycles?
- Start Attempts 1 & 2: 5 min ON / 5 min cooldown after each start;
- Start Attempts 3 to 10: 5 min ON / 15 min cooldown after each start.
At what RPM should Start NOT be attempted?
56% N2.
What is the Minimum Engine Oil Temperature for Engine Start?
Minus 40°C.
What is the Minimum Engine Oil Temperature before selecting TO Power?
+43°C
What is the Maximum Engine Oil Temperature permissible for Continuous operation?
Continuous Operation: +160°C (+165°C / 15 minutes).
How is Thrust Management controlled throughout all phases of flight?
- FADEC (Full Authority Digital Engine Control) which is a dual-channel system.
- Each FADEC channel is supported by an EEC (Electronic Engine Controller).
Describe the 3 Main Components of the N1 assembly:
- Blisk (Fan Assembly);
- 3-Stage LPC (Low Pressure Compressor);
- 4-Stage LPT (Low Pressure Turbine).
Describe the 2 Main Components of the N2 Assembly:
- 10-Stage HPC (High Pressure Compressor);
- 2-Stage HPT (High Pressure Turbine).
How is the FADEC powered once one engine is running?
PMA (Permanent Magnet Alternator) serves as the Dedicated Electrical Power Source.
What is the Maximum Engine Oil Consumption for Each Engine?
0.31 US Quarts/Hour (0.29 Liters/Hour).
What is the usable capacity of Each Engine Oil Tank?
- 11.6 US Quarts (10.9 Liters) / 16 hrs of flight = 5 Qts minimum.
- Note: Oil Qty below 4.3 Qts=> EICAS Advisory msg “L(R) ENG OIL LO QTY”.
How is Engine Oil Cooled?
By 2 Fuel/Oil and 2 Air/Oil Heat Exchangers.
How is the Oil Quantity checked?
- Oil Quantity is displayed on the OIL REPLENISH Tab in the SERVICE Synoptic;
- An Oil Level Sight Gauge on the side of the Reservoir.
Where is the Replenishment Oil Tank located?
Aft Equipment Bay.
What is the Capacity of the Oil Replenishment Reservoir?
6 US Quarts (5.7 Liters).
When can the Engine Oil Levels be accurately checked?
- Between 15 and 60 minutes after the Engine Shutdown.
- REPLENISH Softkey is available ONLY within 15 to 60 minutes after shutdown.
When and How is Engine Oil Replenishment allowed?
- On the Ground with Engines Off;
- Between 15 & 60 minutes after Engine Shutdown;
- Prohibited when OAT is -12°C or colder;
- Via the OIL REPLENISH Tab on the SERVICE Synoptic;
- ORS (Oil Replenish Synoptic) Reservoir “OIL QTY” should be Green before servicing.
Which Fuel ShutOff Valve closes after selecting the ENGINE RUN Switch to OFF?
- HPSOV within the Fuel Metering Unit.
- Note: The FIRE PBA closes the Firewall Fuel SOV.
When is the Approach Idle commanded by the FADEC?
- In Flight;
- Gear Down and Locked or
- Slat/Flap 2 (Flaps are above 5 degrees).
- No Steep Approach Mode is selected.
- Note: Steep Approach 4.5 to 5.5 Degrees (Steeper Approach 3.5 to 4.5 Degrees).
What are the 2 AutoStart Air Envelopes and associated Airspeeds?
- ATS ENVELOPE (CAS message): < 250Kt.
- WINDMILL ENVELOPE (CAS message): >250Kt, N2>7.5%. (255kt recommended)
What is the Engine “Quick Relight” Function?
- If the ENGINE RUN Switch is selected OFF then back ON, the FADEC will recover the existing pwr setting.
- Fuel Schedules and ITT Limits are adapted for each Quick Relight scenario.
When does the ENG FLAMEOUT message appear?
When the N2 reduces abnormally and an Automatic Relight has failed.
What is the Maximum Altitude for an Airborne Engine Start?
30,000 ft.
What is the Maximum Altitude in flight for an APU-Assisted Engine Start?
23,000 ft.
What are the Limitations on the Thrust Reversers?
- Must Not be selected inflight;
- Must Not be used for backup the airplane;
- Not Permitted for Touch-&-Go.
How are the Thrust Reversers controlled and actuated?
- Controlled by the FADEC;
- Actuated by the respective EDP (Engine Driven Hydraulic Pump)
- Note: The Reverser only operates when the associated engine is operating and the EDP is producing
pressure.
What will occur if a Thrust Reverser becomes inadvertently Unlocked?
- Red Master Warning Lights flashing;
- Aural Warning “L (R) Reverser Unlocked”;
- Red L (R) REVERSER UNLOCKED CAS message;
- Red REV icon appears in N1 gauge;
- FADEC limits thrust to idle (regardless of thrust lever position).
