SDR CNMA201111230050

Service difficulty report · Gcu · Boeing 767319

Difficulty date: November 23, 2011
Submitted: December 6, 2011
Operation: Air carrier
Aircraft: N387AX
Make and model: Boeing 767319
Aircraft serial: 24875
Aircraft time: 85,199 hours, 17,676 cycles
System (JASC): 2421 · AC Generator-Alternator
Part: Gcu
Part number: 734284E
Part serial: 3208
Condition: Failed
Part time: 252 cycles
Stage of operation: CL
How discovered: O
Nature of condition: H, J
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

RT GEN DISCONNECTED. RT BUSS TIE ISOLATED, RT AC BUSS NOT POWERED AT 45 MINUTES INTO FLIGHT, FOLLOWED CHECKLIST EVERYTHING RESET. 5 MINUTES LATER, SAME PROBLEM. RETURNED TO DEPARTURE, TROUBLSHOT AND FOUND FAULT ON RT GCU. FAULT SHOWS LEFT LOOP GROUND. R & R RT GCU IAW CMM 24-00. OPS CHECKED GOOD, NO FAULTS, ALL ELEC SYS OPERATE NORMAL.