As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON VISUAL INSPECTION OF PARTS, FOUND 1 EACH INSERT PULLED OUT OF GEARBOX HOUSING AND 2 EACH INSERTS LOOSE AT EXCITER BOX MATING SURFACE. ONE EACH INSERT P/N NAS1394-3L WAS PULLED OUT AND 2 EACH INSERTS WERE FOUND LOOSE. POSSIBLE CAUSE IS EXCESSIVE CLEARANCE BETWEEN BOX AND HOUSING CAUSING BOX TO GET HUNG UP OR HIT ON ENGINE REMOVAL.