PA.X.A.K3FAA-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

Identification should be primarily through the control inputs required to maintain straight flight, not the engine gauges. The “verify” step directs the pilot to retard the throttle of the engine thought to have failed. No change in performance when the suspected throttle is retarded is verification that the correct engine has been identified as failed.

Key numbers

Key numbers for How to identify, verify, feather, and secure an inoperative engine.
NumberWhat it means
Approximately 2 to 3 degrees toward the operative engine, in the absence of specific AFM/POH recommendationsClimb bank
On reaching 400 feet AGL, refer to the printed checklistChecklist

FAA references

  1. AFH ch. 13 (pp. 13-31–13-32) — FAA-H-8083-3C
  2. FAAP874066 Landing Gear Selected Up, OEI Climb Performance Adequate — FAA-P-8740-66
  3. PHAK ch. 2 (p. 2-20) — FAA-H-8083-25C (2023)
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