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