What was found
(CAN) ON PUSH-BACK GROUND HANDLING REPORTED INDICATION OF FLAME/FIRE FROM APU. NO INDICATION IN FLIGHT DECK, BUT CREW SHUTDOWN APU AND ACTIVATED EXTINGUISHER. APU ASSY, PN: 3800488-3, SN: P-944.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) ON PUSH-BACK GROUND HANDLING REPORTED INDICATION OF FLAME/FIRE FROM APU. NO INDICATION IN FLIGHT DECK, BUT CREW SHUTDOWN APU AND ACTIVATED EXTINGUISHER. APU ASSY, PN: 3800488-3, SN: P-944.