As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FIRE INDICATION APPROXIMATELY 10 MINUTES AFTER TAKEOFF. APU WAS NOT RUNNING. COMPLIED WITH QRH AND DISCHARGED BOTTLE 2. ALERT EXTENGUISHED AND CAME BACK A FEW MINUTES LATER. BOTTLE 1 DISCHARGED, ALERT AND APU FIRE HANDLE LIGHT EXTINGUISHED WHEN ENGINE 2 SECURED ON LANDING.