What was found
LEFT OTBD FLAP UPPER SURFACE AT APPROXIMATELY STATION 367 - 377, HAS CORROSION, BULGING SKIN & ALSO HAS CORRODED SHIMS AT ACCESS 566MT OPENING EDGE. FLAP REPLACED ON NON-ROUTINE 0037. SDR INFO, CORRODED, PN 113T3100-63, PART NAME LT OTBD FLAP, SN 000355, FS & BS LOCATION: FROM OTEF 367 - 377. ACFT WAS GNDED.