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AI.II.E.K1bFAA-S-ACS-25 · Nov 2023Knowledge

b. Secondary flight controls

ACS element text (the applicant demonstrates understanding of)

Airplane systems, including: b. Secondary flight controls

Bottom line

Flaps are the most common high-lift devices used on aircraft. There are four common types of flaps: plain, split, slotted, and Fowler flaps. Spoilers are used on the upper surface of the wing to spoil or reduce lift.

Key numbers

Key numbers for b. Secondary flight controls
NumberWhat it means
four common types: plain, split, slotted, and FowlerFlap types

FAA references

  1. PHAK ch. 6 (p. 6-2) — FAA-H-8083-25C (2023)
  2. PHAK ch. 6 (p. 6-8) — FAA-H-8083-25C (2023)
  3. PHAK ch. 5 (p. 5-49) — FAA-H-8083-25C (2023)
  4. PHAK ch. 6 (p. 6-12) — FAA-H-8083-25C (2023)
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