As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS WHILE ALL INDICATIONS NORMAL APU FIRE AMBER DISCH LIGHT OBSERVED TO BE ILLUMINATED IN FLIGHT. MAINTENANCE INSPECTED PRESSURE SWITCH CONNECTOR 11WF-A & WIRINGS FROM CONNECTOR TO THE BACK SIDE OF AFT PRESSURE BULKHEAD, NO FAULT FOUND. TROUBLESHOT IAW TSM 26-22-00-810-803-A, NO PROBLEM FOUND, TEST OK. REMOVED AND REPLACED ENG/APU FIRE PANEL (1WD) IAW AMM 26-12-12, SYSTEM OPS CHECK GOOD.