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GL7500 > Engine > Flashcards

Engine Flashcards

1
Q

Which Engines are installed on the airplane?

A

General Electric – GE Passport 20-19BB1A (High Bypass 5.6:1).

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2
Q

How much Thrust the Engines supply at Sea Level?

A

18,920 lb of thrust at Sea Level up to 30°C (ISA + 15°C).

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3
Q

What is the ITT for Ground & Air Start?

A
  • 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).
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4
Q

What are the Engines Takeoff Thrust Limitations?

A
  • Takeoff Thrust OEI: 10 minutes.
  • Takeoff Thrust AEO: 5 minutes;
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5
Q

How does the pilot know when the engine limitations have been exceeded?

A

The Numbers turn Red on EICAS.

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6
Q

What are the Engines Duty Cycles?

A
  • 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.
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7
Q

At what RPM should Start NOT be attempted?

A

56% N2.

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8
Q

What is the Minimum Engine Oil Temperature for Engine Start?

A

Minus 40°C.

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9
Q

What is the Minimum Engine Oil Temperature before selecting TO Power?

A

+43°C

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10
Q

What is the Maximum Engine Oil Temperature permissible for Continuous operation?

A

Continuous Operation: +160°C (+165°C / 15 minutes).

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11
Q

How is Thrust Management controlled throughout all phases of flight?

A
  • FADEC (Full Authority Digital Engine Control) which is a dual-channel system.
  • Each FADEC channel is supported by an EEC (Electronic Engine Controller).
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12
Q

Describe the 3 Main Components of the N1 assembly:

A
  • Blisk (Fan Assembly);
  • 3-Stage LPC (Low Pressure Compressor);
  • 4-Stage LPT (Low Pressure Turbine).
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13
Q

Describe the 2 Main Components of the N2 Assembly:

A
  • 10-Stage HPC (High Pressure Compressor);
  • 2-Stage HPT (High Pressure Turbine).
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14
Q

How is the FADEC powered once one engine is running?

A

PMA (Permanent Magnet Alternator) serves as the Dedicated Electrical Power Source.

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15
Q

What is the Maximum Engine Oil Consumption for Each Engine?

A

0.31 US Quarts/Hour (0.29 Liters/Hour).

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16
Q

What is the usable capacity of Each Engine Oil Tank?

A
  • 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”.
17
Q

How is Engine Oil Cooled?

A

By 2 Fuel/Oil and 2 Air/Oil Heat Exchangers.

18
Q

How is the Oil Quantity checked?

A
  • Oil Quantity is displayed on the OIL REPLENISH Tab in the SERVICE Synoptic;
  • An Oil Level Sight Gauge on the side of the Reservoir.
19
Q

Where is the Replenishment Oil Tank located?

A

Aft Equipment Bay.

20
Q

What is the Capacity of the Oil Replenishment Reservoir?

A

6 US Quarts (5.7 Liters).

21
Q

When can the Engine Oil Levels be accurately checked?

A
  • Between 15 and 60 minutes after the Engine Shutdown.
  • REPLENISH Softkey is available ONLY within 15 to 60 minutes after shutdown.
22
Q

When and How is Engine Oil Replenishment allowed?

A
    1. On the Ground with Engines Off;
    1. Between 15 & 60 minutes after Engine Shutdown;
    1. Prohibited when OAT is -12°C or colder;
    1. Via the OIL REPLENISH Tab on the SERVICE Synoptic;
    1. ORS (Oil Replenish Synoptic) Reservoir “OIL QTY” should be Green before servicing.
23
Q

Which Fuel ShutOff Valve closes after selecting the ENGINE RUN Switch to OFF?

A
  • HPSOV within the Fuel Metering Unit.
  • Note: The FIRE PBA closes the Firewall Fuel SOV.
24
Q

When is the Approach Idle commanded by the FADEC?

A
    1. In Flight;
    1. Gear Down and Locked or
    1. Slat/Flap 2 (Flaps are above 5 degrees).
    1. No Steep Approach Mode is selected.
  • Note: Steep Approach 4.5 to 5.5 Degrees (Steeper Approach 3.5 to 4.5 Degrees).
25
Q

What are the 2 AutoStart Air Envelopes and associated Airspeeds?

A
  • ATS ENVELOPE (CAS message): < 250Kt.
  • WINDMILL ENVELOPE (CAS message): >250Kt, N2>7.5%. (255kt recommended)
26
Q

What is the Engine “Quick Relight” Function?

A
  • 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.
27
Q

When does the ENG FLAMEOUT message appear?

A

When the N2 reduces abnormally and an Automatic Relight has failed.

28
Q

What is the Maximum Altitude for an Airborne Engine Start?

A

30,000 ft.

29
Q

What is the Maximum Altitude in flight for an APU-Assisted Engine Start?

A

23,000 ft.

30
Q

What are the Limitations on the Thrust Reversers?

A
    1. Must Not be selected inflight;
    1. Must Not be used for backup the airplane;
    1. Not Permitted for Touch-&-Go.
31
Q

How are the Thrust Reversers controlled and actuated?

A
  • 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.
32
Q

What will occur if a Thrust Reverser becomes inadvertently Unlocked?

A
    1. Red Master Warning Lights flashing;
    1. Aural Warning “L (R) Reverser Unlocked”;
    1. Red L (R) REVERSER UNLOCKED CAS message;
    1. Red REV icon appears in N1 gauge;
    1. FADEC limits thrust to idle (regardless of thrust lever position).

GL7500 (16 decks)

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