Engines, APU Flashcards

1
Q

Identify the conditions that would lead to an aborted engine start and accomplishment of the Aborted Engine Start checklist

A
  • Oil pressure rise does not occur.
  • Fuel flow is abnormally high or fluctuating.
  • EGT does not increase by 20 seconds after the FUEL CONTROL
    switch is positioned to RUN.
  • N1 fails to increase after EGT rise
  • EGT quickly nears or exceeds the start limit.
  • Oil pressure indication is not normal by the time the engine is stabilized at idle
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2
Q

Recall the required engine warm up period prior to the application of T/O thrust.

A
  • Required warm up time is 3 minutes.
  • Target warm up time is 5 minutes.

Note: Do not delay takeoff after 3 minute warm-up period

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3
Q

Recall the engine cool down recommendations prior to engine shutdown

A
  • Run the engine for at least 3 minutes.
  • Shutdown may be accomplished earlier for gate arrival
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4
Q

Describe when the FUEL CONTROL switch should be placed to RUN during an engine start

A
  • Verify oil pressure increase and N2 rotation
  • When N2 is at 25%, or if 25% N2 is not possible at maximum
    motoring speed, attempt the start at a minimum of 18% N2 (757)or 15% N2 (767).

NOTE: A magenta bug (fuel on command bug) appears at:
18% N2 on the 757
15% N2 on th e767

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5
Q

Recall the APU starter duty cycle.

A

The starter duty cycle is a maximum of 3 consecutive starts or attempts within a 60 minute period

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6
Q

Recall the maximum altitude to use APU Electrics.

A
  • Electrical power is available throughout the entire airplane
    operating envelope
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7
Q

Recall the maximum altitude to use APU Pneumatics.

A
  • In flight, APU bleed air is available up to approximately 17,000 feet
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8
Q

Recall the EEC’s provide overboost, N1 and N2
overspeed protection, but no EGT over temperature protection.

A
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9
Q

Recall the primary indication for setting thrust on PW engines.

A

EPR

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10
Q

Recall the primary indication for setting thrust on GE engines.

A

N1

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11
Q

Explain how to cancel the APU shutdown sequence if OFF is
selected and the RUN light is still illuminated.

A
  • Momentarily move the APU selector to the START position.
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12
Q

Recall the meaning of an illuminated APU RUN light

A

The APU is at operating Speed

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13
Q

Recall the meaning of an illuminated APU FAULT light.

A
  • Illuminated (amber):
  • The APU has automatically shut down.
  • The APU fuel valve disagrees with the commanded position.
  • A fault is sensed.

Note: The FAULT light momentarily illuminates during an APU start because the APU fuel valve initially disagrees with the commanded
position.

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14
Q

Recall the engine starter duty cycle.

A
  • Continuous for 5 minutes
  • Cool for 30 seconds per minute of operation
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15
Q

Recall the meaning of an illuminated L or R ENG OIL PRESS light

A
  • The respective oil pressure is at or below the minimum value.
  • The oil pressure switch has malfunctioned.
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16
Q

Recall the oil quantity requirements

A
  • 17 quarts recommended for start.
  • If oil quantity is less than 17 quarts, verify 8 quarts following
    engine warm-up with engine at idle.
  • If oil quantity is less than 8 quarts following engine warm-up, Dispatcher Approval is required
17
Q

Understand the controls and indicators on the Thrust Mode Select Panel (TMSP).

A
  • Pushing a switch on the TMSP manually selects a desired thrust reference mode.
  • Verification of the selected mode being active is displayed above the primary thrust reference (N1 or EPR as appropriate).
  • Rotating the TEMP SEL knob is a means of selecting an
    assumed temperature in lieu of using the FMS to enter an
    assumed temperature.
  • If an assumed temperature has been entered and normal thrust (takeoff power) is desired, selecting TO/GA on the TMSP will eliminate the assumed temperature and select normal thrust
    (takeoff power)
18
Q

Recall the meaning of a TAI indication on the upper EICAS
display.

A
  • Displayed (green) - engine anti–ice is on
  • Displayed (amber) - engine anti–ice is on, but N1 is too low
19
Q

Know where the EICAS TAT is displayed.

A

Note: On the ground, TAT approximates Outside Air Temperature

  • Upper EICAS
20
Q

Understand how engine exceedances are displayed on the EICAS.

A
  • The current exceedance is displayed in red
  • The max exceedance attained is displayed by a white number
    below the boxed number
21
Q

Recall the function of the ENG START selectors.

A
  • GND (push-in and rotate) –
  • Opens the start valve to supply starter air.
  • Arms the selected igniter(s).
  • The selector is magnetically held in the GND position until
    50% N2 RPM.
  • AUTO –
  • The selector releases to AUTO at 50% N2 RPM.
  • Closes the start valve and terminates ignition.
  • The selected igniter(s) operate continuously with the L.E. slats
    extended or engine anti-ice on.
  • OFF –
  • No ignition.
  • CONT –
  • The selected igniter(s) operate continuously.
  • There is no operating time limit.
  • FLT –
  • Both igniters operate continuously regardless of the ignition selector position
  • There is no operating time limit.
22
Q

Recall the function of the L/R FUEL CONTROL switches.

A

FUEL CONTROL switches

  • RUN –
  • The normal position for engine operation
  • Opens the engine and spar fuel valves
  • Activates the selected igniter(s).
  • CUT OFF –
  • Closes the engine and spar fuel valves
  • Terminates ignition.
23
Q

Recall the indications for the Thrust Reverser System

A
  • REV (amber)
  • When the reverser is unlocked or in transit.
  • REV (green)
  • The reverser is fully deployed