As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING, APU GENERATOR WOULD NOT CONNECT TO THE BUSS WITH BLUE LIGHT ILLUMINATED. APU BLEED VALVE OPERATES NORMALLY. ACFT GROUNDED. REPLACED THE APU REMOTE FIRE CONTROL PANEL IAW AMM 26-22-03. OPS NORMAL IAW AMM 49-11-00, NUMEROUS TIMES. GROUND VERIFICATION CHECKED GOOD.