As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AN APU FIRE WARNING IN FLIGHT. CREW ACTUATED THE APU FUEL SOV AND THE MESSAGE CLEARED. CONTRACT MX INSPECTED THE APU AND SURROUNDING AREAS AND DETERMINED NO ACTUAL FIRE OCCURRED. MX CLEANED LOOPS AND REPLACED THE CONTROLLER.