As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF THE APU SHUTDOWN ON IT'S OWN. NO INDICATIONS WITH IT, JUST TURNED OFF. WE HAD THE AIRCRAFT DE-ICED AT THE OUTSTATION AND SMELLED DE-ICE FLUID AFTER TAKEOFF BEFORE THE APU SHUT DOWN NEARING DTW. WE RESTARTED THE APU. (CONTINUED ON REMARKS CAT)