As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
2 ATTEMPTS TO BRING APU GENERATORS ON LINE, KICKED OFF GROUND POWER AND APU GENERATOR. GOOD VOLTS AND FREQ'S. ACFT GROUNDED. FOUND APU GENERATOR CONT CB ON P6-4 OUT. CHECKED BEHIND P6-4 PANEL FOR CONTAMINATION OR DEFECTS, NONE NOTED. RESET CB REF AMM 20-60-01, APU GENERATOR OPS NORMAL. CLEARS MEL 24-2B.