As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE ENGINE CHANGE ON NR 4 ENGINE FOUND 4 LOOSE FASTENERS ON THE PYLON FWD ENGINE MOUNT FITTING INBOARD SIDE COMMON TO THE BULKHEAD. INSTALLED NEW FASTENERS. ADJACENT FASTENERS WERE INSPECTED WITH NO DEFECTS NOTED. BOEING S/B 747-54A2069 WAS PREVIOUSLY ACCOMPLISHED.