As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT DISASSEMBLY FOR OVERHAUL, FOUND UNAPPROVED REPAIRS TO THE MAIN HOUSING IDLER GEAR PUMP SOCKET. THE IDLER GEAR STUD FELL OUT WHEN TURNED UPSIDE DOWN. THIS IS TO BE A PRESSURE FIT. THE STUD WAS STAKED IN 4 PLACES BY USE OF PRICK PUNCH. ALSO FOUND SEVERE SCORING OF THE PUMP WALLS.