As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GRR - FL 862 - UPON DESCENT INTO GRR, CREW RECEIVED APU FIRE WARNING. APU WAS AUTOMATICALLY SHUT DOWN AND THE FIRE BOTTLE DISCHARGED. FLIGHT CONTINUED TO GRR AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE FOUND NO EVIDENCE OF A FIRE. A BLEED AIR LEAK WAS FOUND AT THE LOAD CONTROL VALVE FLEX JOINT DUCT ASSEMBLY. (M)