PA.IX.F.K4FAA-S-ACS-6C · Nov 2023Knowledge

How to identify, verify, feather, and secure an inoperative engine.

ACS element text (the applicant demonstrates understanding of)

How to identify, verify, feather, and secure an inoperative engine.

Bottom line

The failed engine is the side that requires no rudder pressure. The Engine Failure After Takeoff Checklist includes the steps "Identify Which engine failed," "Verify Close inop engine throttle," and "Inop engine prop Feather."

Key numbers

Key numbers for How to identify, verify, feather, and secure an inoperative engine.
NumberWhat it means
400 feet AGL — refer to the printed checklistChecklist
no lower than 3,000 feet AGL — plan unfeathering and restartUnfeather
approximately 2 to 3 degrees toward the operative engine, absent specific AFM/POH recommendationsClimb bank

FAA references

  1. PHAK ch. 2 (p. 2-20) — FAA-H-8083-25C (2023)
  2. FAAP874066 Landing Gear Selected Up, OEI Climb Performance Adequate — FAA-P-8740-66
  3. AFH ch. 13 (pp. 13-35–13-36) — FAA-H-8083-3C
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