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The expression "secondary flight control" applies to the:

1. stabiliser
2. rudder
3. speed brake
4. aileron

The combination that regroups all of the correct statements is…

  • A

    1, 3.

  • B

    1, 2, 3, 4.

  • C

    2, 4.

  • D

    2, 3.

Refer to figure.
Note: That with stabiliser is meant the trimmable horizontal stabilizer as seen on most commercial aircraft.

Primary flight controls are considered:
Elevators
Ailerons
Rudder
Roll spoilers

Secondary flight controls are considered:
Flaps
Slats
Stabiliser
Speedbrakes
Trim tabs

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