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AI.IX.B.K1FAA-S-ACS-25 · Nov 2023Knowledge

Purpose of and procedures for a proper steep spiral.

ACS element text (the applicant demonstrates understanding of)

Purpose of and procedures for a proper steep spiral.

Bottom line

A slow downward spiral begins which, if not counteracted by the pilot, gradually increases into a steep spiral dive. Since the airspeed in the spiral condition builds up rapidly, the application of back elevator force to reduce this speed and to pull the nose up only “tightens the turn,” increasing the load factor.

FAA references

  1. PHAK ch. 5 (p. 5-20) — FAA-H-8083-25C (2023)
  2. AFH ch. 4, Preventing Irreversible Deceleration and/or Sink Rate (p. 4-17) — FAA-H-8083-3C
  3. PHAK ch. 5 (p. 5-35) — FAA-H-8083-25C (2023)
  4. AFH ch. 9 (p. 9-28) — FAA-H-8083-3C
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