What was found
BOTH UTILITY BUSSES SHED WITH APU RUNNING ALL HYD PUMPS OFF. REPLACED BPCU AND APU GCU. SYS OPS CKS NORMAL DURING PWR TRANSFER.
- Difficulty date
- December 6, 2009
- Submitted
- December 14, 2009
- Operation
- Air carrier
- Aircraft
- N676UA
- Make and model
- Boeing 767322
- Aircraft serial
- 30028
- Aircraft time
- 31,824 hours, 8,095 cycles
- Engine
- Pwa PW4052
- System (JASC)
- 2420 · AC Generation System
- Part
- Control Unit
- Part number
- 734285D
- Part serial
- 180
- Condition
- Faulty
- Location
- Nr 1
- Component
- Gcu
- Component part number
- M734284DF
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.