As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A QUICK TURN AT THE OPERATORS HOMEBASE, CREW SMELLED SMOKE IN THE CABIN FOLLOWED BY A RED, APU FIRE, CAS MESSAGE ON EICAS. APU AUTO SHUTDOWN AND CREW SET OFF THE APU FIRE BOTTLE. TRIP WAS CANCELLED. TALK WITH MFG, BELIEVE THE APU COMPRESSOR LET LOOSE. LOANER APU WAS ORDER UNDER PO 56-2012-6MO. CREW DISCHARGED THE LT FIRE BOTTLE BY MISTAKE PRIOR TO DISCHARGING THE APU FIRE BOTTLE.