Service difficulty report · Control Unit · Boeing 757222

Difficulty date
November 11, 2012
Submitted
November 28, 2012
Operation
Air carrier
Aircraft
N544UA
Make and model
Boeing 757222
Aircraft serial
25322
Aircraft time
79,063 hours, 22,767 cycles
Engine
Pwa PW2037
Part
Control Unit
Part number
734285D
Part serial
139
Condition
Faulty
Location
Electrical Sys
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

AFTER BOTH ENGINE START, APPLYING BREAKAWAY POWER, ALL ELEC AND PNEUMATICS DROPPED OFF. ENGS WENT TO IDLE, APU OFF, ATTEMPT TO RESET GEN AND BUSES, NO HELP. ACFT RETURNED TO GATE. REPLACED BPCU ALL ELEC POWER RE-STORED TO AIRCRAFT.