As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED APU OVERTEMP AND APU SHUTDOWN IN FLIGHT AND SMOKE IN COCKPIT. CREW FOLLOWED QRH PROCEDURES, CLOSED ENGINE BLEEDS AND SMOKE BEGAN TO DISSIPATE. EMERGENCY WAS DECLARED AND CREW LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED, FOUND APU INLET DUCT COLLAPSED, R & R DUCT AND PERFORMED CHECK IAW AMM. ACFT RELEASED FOR SERVICE.