As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROUTINE CHECK OF IMPULSE COUPLING REVEALED BOTH PAWLS EXCEED NORMAL GAP BETWEEN PAWLS AND PLATE BY AN EXTREME AMOUNT. ALSO, ONE PAWL PIN WAS OBVIOUSLY BENT SO THE HEAD TIPPED OUTBOARD FROM CENTER. THIS PART HAD BEEN INSPECTED 100 HOURS PRIOR AND FOUND TO BE NORMAL IN ALL RESPECTS. THESE COUPLERS SEEM TO BE TOTALLY UNPREDICTABLE FOR SERVICE LIFE. SUBMITTER STATED HAVE FOUND FAILURES AS LOW AS 50 HOURS IN SERVICE.