Type training · Boeing 737NG B1.1 · ATA 52

Boeing 737NG B1.1: Doors (ATA 52)Type training questions & answers

Entry and service doors, overwing exits and flight lock, cargo doors, door seals and wind limits.

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Sample Doors questions with answers

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

  1. 1.Up to what wind speed can 737NG entry, service and cargo doors be opened and closed?

    • A.25 knots
    • B.65 knots
    • C.40 knots
    Show answer and explanation

    Correct answer: C. 40 knots

    Doors can be operated in winds up to 40 kt and left latched open up to 65 kt without damage. Ref Boeing 737-600/700/800/900 training manual, ATA 52.

  2. 2.What should be fitted if a 737NG door stays open for a long time?

    • A.A pressure plug fitted in the frame
    • B.A gust lock fitted on the hinge arm
    • C.A protective door frame cover
    Show answer and explanation

    Correct answer: C. A protective door frame cover

    A protective cover should be put over the door frame if a door is open for a long time. Ref Boeing 737NG training manual, ATA 52.

  3. 3.What supports a 737NG entry door when the airplane is unpressurized?

    • A.The hinges
    • B.The door stops
    • C.The latch rollers only
    Show answer and explanation

    Correct answer: A. The hinges

    Unpressurized, the hinges support the door; pressurized, cabin pressure pushes it out against the stops. Ref Boeing 737NG training manual, ATA 52.

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Part of the Boeing 737NG B1.1 airframe and systems course

One chapter of the Boeing 737NG B1.1 airframe and systems course question bank, for the 737-600/700/800/900, 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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