Type training · Boeing 777 B1.1 · ATA 70–74

Boeing 777 B1.1: GE90 Engine, Fuel, Control and Ignition (ATA 70–74)Type training questions & answers

Standard practices, cowls and mounts, engine design, fuel and EEC control, and ignition.

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Sample GE90 Engine, Fuel, Control and Ignition questions with answers

Three questions from the free preview. Think of your answer first, then open the explanation.

  1. 1.Can engine gaskets and preformed packings be reused?

    • A.Yes, if the B1 certifier agrees
    • B.Yes, if the foreman agrees
    • C.No, never
    Show answer and explanation

    Correct answer: C. No, never

    Gaskets and preformed packings are always replaced. Ref AMM 70-00-01.

  2. 2.In which direction may an already bent engine tube be bent again?

    • A.Any direction
    • B.The reverse direction
    • C.The same direction
    Show answer and explanation

    Correct answer: C. The same direction

    A tube may only be bent further in its original direction. Ref AMM 70-00-01.

  3. 3.What minimum bend radius to tube diameter ratio applies to engine tubes?

    • A.3 to 1
    • B.1 to 1
    • C.2 to 1
    Show answer and explanation

    Correct answer: C. 2 to 1

    The bend radius must be at least twice the tube diameter. Ref AMM 70-00-01.

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Part of the Boeing 777 B1.1 type course

One chapter of the Boeing 777 B1.1 type course question bank, for the 777-200/-200ER with GE90, PW4084 or Trent 800 engines, written in our own words for revision. Your type course and the aircraft maintenance manual stay the authority: limits and procedures can differ between airframes and operators.

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