What was found
DURING ANNUAL INSPECTION AND C/W AD 75-23-08R5 EXHAUST SYSTEM, IT WAS NOTED BEHIND LT ENGINE EXHAUST OUTLET TUBE A RAISED SPOT OF CORROSION ON OUTBOARD MOUNT BEAM. TOUCHING WITH SCRIBE, HOLE PUNCHED THROUGH EASILY. WITH OUTLET TUBE REMOVED, CORROSION WAS NOTED ON AFT CANTED BULKHEAD WEB, PN 08516 01-27 ALSO. 4,089.9 HOURS TOTAL TIME. BOTH BEAM AND WEB WERE REPLACED.