As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION OF GEARBOX FOR METAL IN OIL, IT WAS NOTED THAT 5 OF THE 6 STUDS THAT SECURE THE 2.5 BEARING CAGE TO THE GEARBOX COVER ASSY HAD BACKED OUT ALLOWING MOVEMENT OF THE CAGE INSIDE THE GEARBOX. WHILE LOOSENING HARD WEAR THAT RETAINS THE BEARING CAGE IN THE COVER ASSY, THE STUDS BACKED OUT OF THE COVER INSTEAD OF THE NUTS BACKING OFF OF THE STUDS.