We are examining the Type Certiifcate for the K13. The original indicates
aerobatics including spins "not approved".

in 1967 Schleicher issued an AD approving semi aerobatics and spins, and
printed a modified page 22 to the flight manual. Does this automatically
modify the type certificate? Is there some authority I am not aware of? We
woud like to instruct spin entries in our machine, but are uncertain of the
legal status.

jim Rizzo