As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NR 1 CONSTANT SPEED DRIVE CLUSTER GEAR FAILED. NR 1 GENERATOR WAS THEN DRIVEN DIRECTLY FROM THE ACCESSORY GEARBOX PRODUCING AN OVER-FREQUENCY CONDITION. THIS CONDITION WOULD NORMALLY BE SENSED BY THE GCU P/N 700-1-22400-420, BUT DUE TO A FAULT OVER-FREQUENCY CARD IN THE GCU, MAJOR COMPONENT FAILURES OCCURRED DUE TO THE OVER-FREQUENCY. PART TC: 15,842.