As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APU START, APU STARTED AND THEN SHUT DOWN. NO FAULT LIGHT RPM DROPPED IMMEDIATELY TO ZERO. GRN CREW REPORTED FLAME OUT THE EXHAUST. COMPARTMENT NO EXTERNAL DAMAGE FOUND. FWD APU TO MCO AND PLACARD PER MEL 49-00-01A M PROC C/W. R&R APU ASSY OPS + LK CK GOOD PER AIM 49-10-00. M PROCEDURES REVERSED PLACARDS REMOVED.