Certification and practice mismatches
Just something I've noticed once or twice, and I wondered if anybody had any other examples.
Stalling: certification is done at 1kn/s deceleration, but in many cases flying instructors teach using a much higher deceleration rate so that they can get a better stall pitch break during stalling demos. [Also the hopefully now dead issue of "powering out of the stall" which EASA and FAA clamped down on a few years ago.]
Airliner evacuations: aeroplanes are always certified using "step and slide", whilst many airlines practice the slower "sit and slide".
Grumman AA5 (happens to be a favourite aeroplane of mine): POH uses flapless take-offs, whilst most experienced pilots on type will use 1/3rd flap for short field take-offs.
Can anybody think of any other differences out there between how an aircraft is certified, and how it's subsequently operated?
G