Lockheed C-5 Galaxy Operations Limits Practice Test

Do not extend inboard TRs in flight while ______ are deployed.

Flaps Slats Gear Doors

Correct Answer:

Flaps

Explanation:

Wing high-lift devices are interlocked so that certain surfaces don’t move together in flight. The inboard trailing-edge devices (TRs) are part of the same high-lift system as the flaps, and extending them while the flaps are deployed would change trailing-edge geometry in a way that can cause surface interference and exceed safe wing loads. To keep operating within safe limits, the rule is to keep the inboard TRs retracted whenever the flaps are deployed in flight. Slats, gear, and doors operate under different limits and aren’t part of this particular interlock, so they don’t drive this restriction.

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