As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT, NR 4 GENERATOR TRIPPED OFF. REMOVED AND REPLACED GCU IN ACCORDANCE WITH M/M 24-20-5. REMOVED AND REPLACE BUSS PROTECTION PROTECTION PANEL IN ACCORDANCE WITH 24-20-7. REMOVED AND REPLACED FREQUENCY LOAD CONTROLLER IN ACCORDANCE WITH M/M 24-10-16. OPERATIONAL CHECK GOOD; ALL SYSTEMS NORMAL ON ENGINE RUN IN ACCORDANCE WITH M/M 71-00.