PA.IX.G.K5FAA-S-ACS-6C · Nov 2023Knowledge
Applicant responsibilities during simulated feathering.
Applicant responsibilities during simulated feathering.
Bottom line
In multiengine training, zero thrust is set to simulate a feathered propeller. A windmilling propeller can give an improperly trained multiengine pilot the mistaken perception that the engine is still developing useful thrust. That mistaken perception can create a psychological reluctance to feather, because feathering stops propeller rotation.
Key numbers
| Number | What it means |
|---|---|
| no lower than 3,000 feet AGL (plan unfeathering and restart) | Unfeather floor |
| minimum 400 feet AGL (simulated engine inoperative emergency at low altitude in the airplane) | Low-alt sim floor |
| below 200 feet AGL reserved for simulators and training devices (simulated engine failures) | Sim floor |
FAA references
- AFH ch. 13 (p. 13-36) — FAA-H-8083-3C
- FAA-P-8740-66, Flying Light Twins Safely — FAA-P-8740-66
- AFH ch. 9 (p. 9-25) — FAA-H-8083-3C
- AFH ch. 9 (p. 9-29) — FAA-H-8083-3C
- PHAK ch. 2 (p. 2-19) — FAA-H-8083-25C (2023)
- PHAK ch. 2 (p. 2-20) — FAA-H-8083-25C (2023)
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