What was found
BOTH UTILITY BUSSES TRIPPED OFF UPON TRANSFER TO APU POWER. REPLACED BPCU PER AMM & OPS CHECKED ELECTRICAL SYS WITH BOTH ENGINES RUNNING. BOTH UTILITY BUSSES TRANSFER OK FROM ENGINE TO APU POWER.
- Difficulty date
- June 14, 2012
- Submitted
- June 23, 2012
- Operation
- Air carrier
- Aircraft
- N676UA
- Make and model
- Boeing 767322
- Aircraft serial
- 30028
- Aircraft time
- 41,535 hours, 10,336 cycles
- Engine
- Pwa PW4052
- System (JASC)
- 2497 · Electrical Power System Wiring
- Part
- Bpcu
- Part number
- 734285D
- Part serial
- 139
- Condition
- Failed
- Location
- Electrical Buss
- 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.