Type training · Boeing 757-300 differences · ATA 27

Boeing 757-300 Differences: Flight Controls (ATA 27)Type training questions & answers

Six-module CSEUs, elevator feel shift and feel limit, flap skew detection, the FSAM and spoiler tail strike protection.

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Sample Flight Controls questions with answers

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

  1. 1.How many modules does each 757-300 CSEU contain?

    • A.Four
    • B.Six
    • C.Eight
    Show answer and explanation

    Correct answer: B. Six

    Two PSMs, three SCMs and one YSM. The 757-200 CSEU has eight modules, with separate stabilizer trim/elevator asymmetry, rudder ratio changer and yaw damper modules.

  2. 2.Which modules make up a 757-300 CSEU?

    • A.1 PSM, 4 SCM, 1 FSAM
    • B.2 PSM, 3 SCM, 1 YSM
    • C.2 PSM, 3 SCM, SAM, YDM, RRCM
    Show answer and explanation

    Correct answer: B. 2 PSM, 3 SCM, 1 YSM

    The YSM takes over the jobs of the -200 yaw damper, stabilizer trim/elevator asymmetry and rudder ratio changer modules.

  3. 3.For which functions do the two 757-300 CSEUs back each other up?

    • A.Every function, including the yaw dampers
    • B.Asym limiter, feel limit, mach trim, ratio changer
    • C.Spoiler control and the auto speedbrake actuator
    Show answer and explanation

    Correct answer: B. Asym limiter, feel limit, mach trim, ratio changer

    Only the elevator asymmetry limiter, elevator feel limit, speed/mach trim and rudder ratio changer are shared. Otherwise the CSEUs work independently.

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Part of the Boeing 757-200 to -300 differences course

One chapter of the Boeing 757-200 to -300 differences course question bank, for the 757-300, for engineers rated on the 757-200, 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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