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PA.X.A.K5FAA-S-ACS-6C · Nov 2023Knowledge

Feathering, securing, unfeathering, and restarting.

ACS element text (the applicant demonstrates understanding of)

Feathering, securing, unfeathering, and restarting.

Bottom line

To feather the propeller, the propeller control is brought fully aft; all oil pressure is dumped from the governor and the counterweights drive the propeller blades toward feather. Plan unfeathering and restart to be completed no lower than 3,000 feet AGL.

Key numbers

Key numbers for Feathering, securing, unfeathering, and restarting.
NumberWhat it means
up to 10 secondsFeather time
no lower than 3,000 feet AGLRestart floor
400 feet AGLChecklist

FAA references

  1. AFH ch. 13 (pp. 13-5–13-6) — FAA-H-8083-3C
  2. AFH ch. 13 (p. 13-36) — FAA-H-8083-3C
  3. FAAP874066 Landing Gear Selected Up, OEI Climb Performance Adequate — FAA-P-8740-66
  4. AFH Glossary (p. G-16) — FAA-H-8083-3C
  5. RMH ch. 3 (p. 3-2) — FAA-H-8083-2A
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