As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING UNSCHEDULED MAINTENANCE INSPECTION, IT WAS NOTED THAT THE ENGINE MOUNT BULKHEADS WERE WORKING. THE ENGINE MOUNTS WERE REMOVED AND IT WAS OBSERVED THAT BOTH THE LH AND RH KEEL BULKHEAD SKINS WERE SHATTERED FROM YEARS OF WORK HARDENING. THERE IS CURRENTLY NO INSPECTION TO INSPECT THE STRUCTURE OR SUB STRUCTURE UNDER THE ENGINE MOUNTS/TUNNEL AREA AND IT IS IMPOSSIBLE TO SEE WITHOUT REMOVAL OF THE SURROUNDING COMPONENTS.