As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) TACHOMETER GEAR HAD UNAPPROVED REPAIR CARRIED OUT IN THREADED AREA. LACK OF INTERFERENCE FIT BETWEEN GEAR AND BEARING PN 358272. PN 3103580-3 NR 2 IDLER GEAR HOUSING SUSPECT UNAPPROVED PART. PERSONNEL/MAINTENANCE ERROR. UNAPPROVED PART. UNAPPROVED REPAIR.