Engine Bleed Air Flashcards

1
Q

What would cause a system fault light to illuminate?

A
  • bleed air overheat
  • bleed air overpressure
  • HP bleed or PRV valves open when commanded closed
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2
Q

What valves are closed when you place the engine bleed air switch to OFF?

A
  • engine bleed air valve
  • PRV
  • HP bleed air valve
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3
Q

Do you still have NAI and trust reversing with the engine bleed air switch OFF?

A

yes, unless the PRV is commanded closed by start valve open, bleed air overheat, or HP valve failed open

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4
Q

Bleed Duct Leak L: How many switches will be involved?

A

5 or 6:

  • left isolation valve
  • engine bleed switch 1 & 2
  • # 1 pack control selector
  • # 1 demand pump switch
  • WAI switch if in use
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5
Q

Bleed Duct Leak L: What should be considered when configuring the airplane?

A
  • Left LE will operate in secondary mode (“Flaps Primary” followed by “Flaps Drive” EICAS message until fully extended or retracted)
  • slight asymmetry until fully extended or retracted
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6
Q

Bleed Duct Leak L: What should be considered if aircraft has to be towed in?

A

Leave #1 engine running for hydraulics for steering

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