What was found
JUST PRIOR TO REACHING CRUISE, BOTH UTILITY BUSSES TRIPPED. SINGLE RESET OF BOTH UTILITY BUSES NO HELP. UTILITY BUSSES RESET 4 TIMES, NO HELP. REPLACED BPCU. SYS OPS NORMAL, ALL BUSSES RESET AND FUNCTION NORMALLY.
- Difficulty date
- January 9, 2009
- Submitted
- January 12, 2009
- Operation
- Air carrier
- Aircraft
- N598UA
- Make and model
- Boeing 757222
- Aircraft serial
- 28751
- Aircraft time
- 39,707 hours, 10,985 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 2450 · AC Power Distribution System
- Part
- Bpcu
- Part number
- 734285D
- Condition
- Failed
- Location
- Electrical Sys
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.