As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ASH 7132 IAD. AFTER LANDING PILOT REPORTED THE APU AUTO SHUTDOWN AND HAD A MOMENTARY FIRE WARNING. CONTRACT MX INSPECTED THE APU COMPARTMENT AND DID NOT FIND ANY EVIDENCE OF FIRE. MX RELAMPED APU SWITCH AND CLEANED LOOPS AND CONNECTORS.