What was found
AFTER TAKEOFF CREW HEARD LOUD "BANG" FOLLOWED BY BUFFETING OF AIRCRAFT, AIRCRAFT CONTROL AFFECTED. ON LANDING, CREW OBSERVED ENGINE COWLING ON RT ENGINE HAD COME OFF FROM TOP/INBOARD FASTENING POSITION AND HAD BEAT ITSELF AGAINST FUSELAGE. DETERMINED THAT MX PERSONNEL FROM PREVIOUS EVENT HAD FAILED TO PROPERLY FASTEN 16 CAMLOCS AT AFFECTED POSITION. QC INADEQUATE. LOCAL FSDO HAS TAKEN APPROPRIATE ACTION AGAINST FACILITY INVOLVED.