No where in the airplane is there
a placard that states "prohibited" about anything. Doesn't say anything
about "unauthorized" either. I don't have the POH here in front of me
at the time, but as I recall it does say something about slips and flaps
during landing, but at 4,000' AGL, we wern't anywhere near landing.
I have our '61 C-172 POH in front of me and it lists 'authorized' operations.
I guess if it's not on the list "my" interpretation would be "unauthorized". It
also goes on to state 'No acrobatic manuvers are approved except those listed
below'. Loops wasn't one of them. I guess it was "my" interpretation that if it
wasn't 'approved' it was "prohibited". As for the prohibited 40 slip placard,
it was an AD, I believe, and my A&P put it (the label, placard, whatever you
want to call it) on the flap handle. I argued about it and he showed me the AD
number (please don't make me dig that one up) and instructions.
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