As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT WITH BOTH ENGINES RUNNING BOTH GENERATOR TRIPPED OFF LINE. REPLACED BPCU & CLEANED LEFT ENGINE IDG FEEDER CABLE DISCONNECT CONTACTS D1092P & D1092J, PINS A & B, GMM 20-61-01. ACP'D HIGH POWER RUNUP WITH ELECTRICAL LOAD & APU OFF. LEFT & RIGHT GENERATORS OPERATED OK - VOLTS 115VAC, FREQ 400 TO 404 HZ.