Type training · Boeing 767 B1.1 · ATA 76

Boeing 767 B1.1: CF6-80C2 FADEC and Engine Controls (ATA 76)Type training questions & answers

EEC, HMU, control alternator, thrust levers and resolvers, reversionary modes, limits and idle control.

Start practising →46 questions · free preview available

Sample CF6-80C2 FADEC and Engine Controls questions with answers

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

  1. 1.Is there a mechanical link between the 767 thrust levers and the CF6-80C2 fuel control?

    • A.No, the EEC must work to run
    • B.Yes, a cable to the HMU
    • C.Yes, as a backup in hard mode
    Show answer and explanation

    Correct answer: A. No, the EEC must work to run

    There is no mechanical engine control connection; the EEC must be operational for the engine to run.

  2. 2.How does the EEC command the HMU?

    • A.Analog electric signals
    • B.ARINC 429 digital words
    • C.Pneumatic pilot signals
    Show answer and explanation

    Correct answer: A. Analog electric signals

    The EEC controls the HMU with analog electrical signals; the HMU meters fuel to the nozzles.

  3. 3.What guarantees the engine can be shut down whatever the EEC does?

    • A.The HPSOV in the HMU
    • B.The spar valve only
    • C.The EEC power switch
    Show answer and explanation

    Correct answer: A. The HPSOV in the HMU

    The fuel control switches act directly on the high pressure fuel shutoff valve in the HMU.

Practise all 46 CF6-80C2 FADEC and Engine Controls questions →

Part of the Boeing 767 B1.1 engine and APU course

One chapter of the Boeing 767 B1.1 engine and APU course question bank, for the 767-300 with GE CF6-80C2 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.

All Boeing 767 B1.1 chapters →

More Boeing 767 B1.1 chapters

Start practising →All Boeing 767 B1.1 chapters