7 - Engines Flashcards

1
Q

Engine Start Selector - Auto

A
  • start valve closes and ignition terminates when selector moves from GND to AUTO at 50% N2
  • selected igniter(s) operate continuously when slats are extended or EAI on
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2
Q

Engine Start VALVE light on -

A

valve is not in proper position

does not open with Start Selector in GND, does not close at 50% N2

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3
Q

Engine Start Selector - FLT

A

both igniters operate continuously

regardless of Ignition Selector position

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4
Q

How do you identify a hung start?

A

N2 does not increase for 5 sec

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5
Q

What do fuel control switches control?

A

fuel valves (engine/spar) and ignition

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6
Q

What do ENG VALVE and SPAR VALVE. lights indicate?

A

valve not in position required by Fuel Control or Engine Fire switches

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7
Q

When does Stby Eng Indicator activate in AUTO? (3)

A

AC power lost

both EICAS fail

CRT has failed on the ground and STATUS selected

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8
Q

Starter Limits

A
  • 5 min

- 1.5 min cooling/min of operation

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9
Q

Minimum duct press for pneumatic start

A

30 psi

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10
Q

Eng Start VALVE light (when does it illuminate?)

A
  • not in position required by Start Valve Selector

- open with N2 above 50%

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11
Q

Eng Start Selector: (what does it do?)

  • GND
  • AUTO
  • CONT
  • FLT
A
  • opens start valve/arms igniter(s) until 50% N2
  • closes start valve/igniter(s) off, selected igniter(s) CONT when flaps extended or TAI ON
  • selected igniter(s) on continuously
  • both igniters in both engines CONT
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12
Q

What powers the EECs?

A

dedicated permanent magnet alternators

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13
Q

What protection do EECs provide in

Normal -

Alternate -

A
  • overboost, overspeed
  • overspeed

NO overtemp

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