What was found
FLAPS WOULD NOT DEPLOY IN FLIGHT, NORMAL OR EMERGENCY, UPON APPROACH TO TEB. RETURNED TO PTK AND LANDED. REPLACED LEFT WING INBOARD FLAP ACTUATOR P/N 1159SCC211-7, S/N 36-1174, WITH OVERHAULED UNIT P/N 1159SCC211-15, S/N 76-117. CHECKED FLAP SYSTEM RIGGING AND OPERATION. (M)