As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KSUU - APU FIRE WARNING AND MASTER LIGHT WITH BELL WENT OFF, PULLED HANDLE AND DISCHARGED BOTTLE. TROUBLESHOT SYSTEM FOUND A12 AND APU 'LOOP B FIRE' BAD FIRE WARNING NO LONGER USEABLE. TRANSFERRED TO DMI 342 FOR FURTHER TROUBLESHOOTING, PULLED AND COLLARD APU CIRCUIT BREAKERS IAW MEL 49-1 PLACARDS INSTALLED. (M)