As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED, (APU FIRE INDICATION DURING FLIGHT. PERFORMED QRH WITHOUT EXTINGUISHING HALON FIRE BOTTLE.) AIRCRAFT LANDED UNEVENTFULLY. MAINTENANCE COULD NOT DUPLICATE THE PROBLEM AND PLACED THE APU ON MEL FOR FOLLOWUP. EWR MAINTENANCE PERFORMED FOLLOWUP AND TROUBLESHOT APU FIRE DETECTOR AND PERFORMED OPERATIONAL TEST ON APU FIRE DETECTOR SYSTEM IAW MM NR 26-12-00-810-802-A. NO PROBLEMS DETECTED AND OPS CHECKED GOOD. MEL PLACARD REMOVED AND CLEARED, AND AIRCRAFT RETURNED TO SERVICE -SDR CLOSED-