What was found
NR 1 ENG LOWER ISOLATION PACK BOLT SHEARED OFF AND LAYING ON UNISON RING. TRIED TO REMOVE SHEARED BOLT FROM MOUNT UNABLE TO ACP. SHIM PACK AND SHEARED BOLT HEAD PACKAGED AND ON FLIGHT DECK. REPLACED NR 1 ENG LOWER FWD ENG MOUNT. ACP'D INSP OF FWD ENG MOUNT INSTALLATION. SAFETY AND SECURITY GOOD. NO DEFECTS FOUND. NOTE: NOSE COWL WAS NOT REMOVED, SAME ESN CAME DOWN AND UP AFTER FWD MOUNT WORK. ENG RUN - LK CHECK OKAY. ACCMP'D VERIFICATION FLIGHT DUE TO ENGINE POS 01 REMOVAL AND REINSTALLATION. ITEM CLEARED.