(This is the transfer of a reply to this thread that was posted in 'Tech Log'. CFI: Damn good point about insurance. The practice would have to be in Ops Manual).
What a marvellous topic. I recall this starting a rather heated debate back in my
instructing days. In viewpoint is
(re: pistons)....
TWIN
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For engine failures, simulate by closing the throttle. Set zero thrust when student completes drill. Never simulate by 'slotting' the mixture. Exception? Yes. I am a firm
believer in experiencing a fully feathered approach. Thus, full engine shutdown is ok if
1,000'+ and ATC is notified (to keep traffic away).
SINGLE
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Provided a decision height is chosen (the point at which any attempt to restart the
engine is abandoned and the pilot commits himself to a forced landing, I see no problem
in doing so. I had MY instructor take the keys out of the IGN once. I never did that.
You are just asking for trouble. Delib. shutting down of an engine is of benefit to teach the student (1. the aircraft really DOES still fly, 2. how to do an airstart and 3. How much fun a silent barrel roll is). Shut down of an engine during a PFL would kill your ability to have a decision/committal height (thus VERY unwise).
This is just my opinion. Let the debate continue.
