What was found
AIR TURNBACK WHILE APU WAS OFF, RECEIVED APU FIRE INDICATION, BOTTLE WAS DISCHARGED AND LIGHT EXTINGUISHED. R&R LOWER APU FIRE LOOP DETECTOR - OPS CHECK GOOD PER MM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR TURNBACK WHILE APU WAS OFF, RECEIVED APU FIRE INDICATION, BOTTLE WAS DISCHARGED AND LIGHT EXTINGUISHED. R&R LOWER APU FIRE LOOP DETECTOR - OPS CHECK GOOD PER MM.