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P-3C Basics > Start Malfunctions > Flashcards

Start Malfunctions Flashcards

1
Q

Engine Fire During Start

A
  1. Fuel and Ignition switch (engine being started) - OFF
  2. Emergency Shutdown handle (Engine on fire) - PULL
  3. HRD (Engine on fire) - DISCHARGE
  4. Complete Engine fire on the Ground checklist
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2
Q

Starter Disengagement Failure

A
  1. Emergency Shutdown Handle (Respective engine) - PULL
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3
Q

Bleed Air Manifold does not pressurize when engine is selected

A
  1. Engine Start Selector - OFF
  2. Ground Air Conditioning - ON
  3. Ensure the start control CB and the Essential DC feeder #3 are set
  4. Ensure the APU load and shutoff valve CB on GOB are set
  5. Ensure the INST BUS 1 power CB on the MEAC bus is set
  6. Ensure that the bleed air start valve CB on the GOB and the bleed are pressure indicator on INST BUS 1 is set
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4
Q

Start Button will not engage

A

The starter is held by the START CONT cb on SEDC

  1. Engine Start Selector - Off
  2. Ground air conditioning - ON
  3. Ensure the start control CB and the Ess DC Feeder #3 are set
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5
Q

No Propeller rotation when the start button is pushed in

A

There may not be enough air in the manifold, the start valve may only be partially open or not at all.

  1. Engine start button - PULL
  2. Engine start selector - OFF
  3. Ground air conditioning - ON
  4. Close the respective bleed air valves, if the light does not extinguish, check the respective CB
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6
Q

No Bleed air drop when the start button is pushed in (rotation has occurred)

A

The gauge may be bad or power to the instrument is interrupted.

  1. Engine start button - PULL
  2. Engine start selector - OFF
  3. Ground air conditioning - ON
  4. Ensure the bleed air manifold pressure indicator CB and the INST BUS 1 CB on the MEAC is set
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7
Q

Start Button pops prior to lightoff

A

Electrical power to the start button solenoid may be lost.

  1. Bleed air manifold pressure - Verify previously noted value
  2. Fuel and Ignition Switch - OFF
  3. Engine Start selector - OFF
  4. Ground air conditioning - ON
  5. Ensure the start control CB and Ess DC Feeder #3 are set
  6. If the ground air conditioning can be selected attempt another start. If the starter button engages for a short time and no rotation is observed, immediately terminate the start to prevent disintegration of the starter due to a shear starter shaft.
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8
Q

Bleed air manifold pressure less than 25 psi at 16% rpm

A

Possible causes: poor air supply or a leaking bleed air manifold

  1. Fuel and Ignition switch - OFF
  2. Engine start button - PULL
  3. Engine start selector - OFF
  4. Ground air conditioning - ON
  5. Attempt an isolated start on that engine or try another engine
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9
Q

No Fuel Flow indication at 16%

A

Possible causes:

  1. Speed sense control shaft sheared
  2. Bad 16% switch
  3. Open fuel shutoff valve

If no lightoff by 33% or maximum motoring RPM, proceed as follows:

  1. Fuel and Ignition switch - OFF
  2. Engine start button - PULL
  3. Engine start selector - OFF
  4. Ground air conditioning - ON
  5. Ensure the fuel shutoff valve CB for the respective engine is set
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10
Q

Fuel flow but no lightoff

A

Fuel flow indicates the speed sense control functions normally (unless sheared after initiated) and the fuel shutoff valve is set (Unless CB popped afterwards)

  1. Fuel and Ignition switch - OFF
  2. Engine start button - PULL

If fuel flow does not return to zero, pull emergency shutdown handle to close fuel shutoff valve mechanically

  1. Engine start selector - OFF
  2. Ground air conditioning - ON

Engine should be motored prior to another start attempt to remove residual fuel

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11
Q

No oil pressure by 35% rpm

A

Only one CB for each engines gearbox and power oil sections

  1. Fuel and Ignition switch - OFF
  2. Engine start button - PULL
  3. Ensure the CBs for the oil pressure gauges are set
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12
Q

Primary Fuel Pump (Paralleling) light off during start

A

If the light fails to come on before 65%, the paralleling valve solenoid or the secondary pump may have failed.

  1. Continue the start and allow the engine to assume the selected RPM
  2. Shutdown the engine

If the engine fails to shutdown with the fuel and ignition switch, Fuel Shutoff valve CB may have popped.

  1. A second attempt to start is recommended prior to calling maintenance
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13
Q

Fuel Spewing from the engine Nacelle

A

Manifold drain is closed electrically at 16%, receiving power from Fuel Shutoff valve CB through Ignition relay. If leak is associated with no lightoff, it may be a bad relay. If lightoff occurs, the drain may be bad or a leak may be present.

  1. Fuel and Ignition switch - OFF
  2. Engine start button - PULL
  3. Engine start selector - OFF
  4. Ground air conditioning - ON

(MAYBE prime to force closed with pressure)

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14
Q

Start button pops early

A
  1. Continue the start
    - rpm may stagnate -
  2. Engine start selector - OFF
  3. Ground air conditioning - ON
  4. If ensure start control CB and Ess DC #3 are set
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15
Q

Hot Start

A

Between 830-850
1. Continue and record

Exceed 850

  1. Fuel and Ignition switch - OFF
    - If starter has not popped, continue motoring to cool engine (Keep 1 min duty cycle in mind) -
  2. Engine start button - PULL
  3. Engine start selector - OFF
  4. Ground air conditioning - ON
  5. Another start may be attempted

Exceed 965 - Overtemp inspection required

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16
Q

Cold Start

A

If 720-750, continue and record. Below 720, discontinue and attempt another start with nulled TD. If subsequent start below 720, discontinue, maintenance action required.

17
Q

Stagnated or Stalled start

A

Stagnated = No Rapid rise of TIT

  1. Fuel and Ignition switch - OFF
  2. Engine start button - PULL
  3. Engine start selector - OFF
  4. Ground air conditioning - ON
18
Q

Torching or Excessive Smoke during start

A
  1. Fuel and Ignition switch - OFF
  2. Engine start button - PULL
  3. Engine start selector - OFF
  4. Ground air conditioning - ON

Call for maintenance

19
Q

Abnormal Vibration During Start

A

Can be caused by ice frozen to the propeller, loose engine components, a faulty fuel control or a misrigged propeller blade

  1. Fuel and Ignition switch - OFF
  2. Engine start button - PULL
  3. Engine start selector - OFF
  4. Ground air conditioning - ON
  5. After an inspection of the engine/propeller assemblies another start may be attempted
20
Q

Primary Fuel Pump Light on Above 65% RPM

A

This can be caused by a failed primary pump or the 65% switch may have failed to deenergize and power from the fuel shutoff CB is still energizing the paralleling solenoid.

  1. Fuel Shutoff Valve CB - PULL
  2. If the light goes out, and it is a must situation that you go on the flight leave the CB out.
  • You deenergize the ignition relay
  • Autofeather should NOT be used
  • Do not loiter that engine
  • To secure the engine with the fuel and ignition switch, the fuel shutoff valve CB must be reset
  • If the light remains on after you pull CB, the primary pump may have failed.
21
Q

Prop Pump Light on in Low RPM

A

It is an unacceptable condition for the first start of the day. Secure the engine and call maintenance.

22
Q

Fuel Pressure Low Light in Low RPM

A

Check the FF + FQ gauges

If a fuel leak is visible:
 - Fuel and Ignition (affected engine) - OFF
If there is no visible leak:
 - Respective boost pump - CYCLE
 - If light goes out, continue operation
If the light remains on:
 - Engine RPM - Shift to normal
 - If light goes out, shift engine back to low RPM and continue
If light still remains on:
 - Secure engine and call maintenance
23
Q

Oil Pressure low light in Low RPM

A

Illumination is Low RPM is not necessarily a malfunction and is common.

Check if in limits and continue operations or secure engine as necessary.

24
Q

EDC Press Low Light remains on after Start

A

Normally out by 65% during start

Possible Causes:

  1. Sheared EDC Drive Shaft
  2. EDC inadvertently disconnected
  3. EDC oil pressure is low. Low level in sump

Actions:

  1. Allow engine to assume selected RPM
  2. Shutdown engine with the Fuel and Ignition switch.

If mission is essential, ensure normal RPM is selected and ground air conditioning is on prior to disconnecting.

P-3C Basics (33 decks)

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