As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4036 - DURING GROUND OPERATIONS, CREW RECEIVED AN APU FIRE WARNING. APU WAS SHUTDOWN. MAINTENANCE INSPECTION REVEALED EVIDENCE OF FIRE WITH THE WIRING HARNESS AND COWLING BURNED. MAINTENANCE COMPLIED WITH AN APU FIRE INSPECTION IAW EMB MM FOLLOWED BY REMOVING AND REPLACING THE APU IAW EMB MM. OPS AND LEAK CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)