As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL INSPECTION, SEVERE CORROSION FOUND ON RT OUTBOARD ENGINE MOUNT BEAM ASSY, AFT CANTED BULKHEAD AND RT AND LT DOUBLERS. PROBE WAS USED TO TEST CORROSION AND PUSHED COMPLETELY THROUGH MOUNT BEAM. PARTS ARE EXTREMELY SCARCE FOR THIS REPAIR. CORROSION WAS CAUSED BY HEAT EXHAUST TAILPIPE AND ELBOW. SUGGEST HEAT SHIELD.