As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)UPON REMOVING L/H MGB COWLING FOR ROUTINE MAINTENANCE, THE FORWARD MGB ATTACHMENT BOLT WAS NOTICED TO BE RAISED UP FROM FEET. UPON REMOVAL OF THE BOLT IT WAS FOUND CRACKED IN HALF. THE REMAINING HALF OF THE BOLT WAS REMOVED WITH A BOLT EXTRACTOR AND A THOROUGH INSPECTION WAS CARRIED OUT ON THE MGB AND AIRFRAME STRUCTURE.