As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON THE GROUND DURING A QUICK TURN GROUND CREW REPORTED SMOKE. LARGE AMOUNTS GREY AND WHITE IN COLOR. COCKPIT INDICATIONS APU DID NOT AUTO SHUTDOWN. EXTREME AMOUNT OF SMOKE EXITING APU EXHAUST. SMOKE NOTED IN CABIN AND COCKPIT POSSIBLY FROM WIND BLOWING SMOKE. NO DEFECTS NOTED. OK FOR SERVICE.