As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AUTO SHUTDOWN AFTER TAKEOFF. ATTEMPTED TO RESTART APU ON DESCENT AND AFTER START WE SMELLED A STRONG ODOR AND SMELLED LIKE FUEL. (EMERGENCY DECLARED) CLEANED OUT DE-ICING FLUID FROM APU FIRE BOX. PERFORMED OPS CHECK OF THE APU SYS. NO MORE DE-ICING FLUID OR FUEL ODOR. OPS CHECK GOOD OF THE APU SYS IAW AMM49-10-00.