Type training · Boeing 777 B1.1 · ATA 75–80

Boeing 777 B1.1: GE90 Air, Reverser, Oil and Starting (ATA 75–80)Type training questions & answers

Clearance control and bleeds, thrust levers, indicating, thrust reverser, oil and starting.

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Sample GE90 Air, Reverser, Oil and Starting questions with answers

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

  1. 1.Which GE90 turbine cooling valve does the EEC control?

    • A.The HPT ACC valve
    • B.The LPT ACC valve
    • C.The CCC valve
    Show answer and explanation

    Correct answer: B. The LPT ACC valve

    The EEC controls the LPT active clearance control valve. Ref AMM 75-00-00.

  2. 2.Which GE90 turbine cooling valve is operated by servo fuel?

    • A.The HPT ACC valve
    • B.The LPT ACC valve
    • C.The CCC valve
    Show answer and explanation

    Correct answer: A. The HPT ACC valve

    The HPT ACC valve uses servo fuel. Ref AMM 75-00-00.

  3. 3.How does the EEC operate the GE90 VSV and VBV actuators?

    • A.Solenoids in the actuators
    • B.Stage 7 bleed air
    • C.Torque motors in the HMU
    Show answer and explanation

    Correct answer: C. Torque motors in the HMU

    Torque motors in the HMU meter servo fuel to the actuators. Ref AMM 75-00-00.

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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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