As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS REPORTED A LEFT HAND FIRE LOOP ANNUNCIATOR REPEATEDLY TRIPPED IN FLIGHT. ALSO STARTED TRIPPING LEFT HAND T-HANDLE AND MASTER WARNING ANNUNCIATOR (FLASHES). MAINTENANCE RE-RACKED THE FIRE EXTINGUISHING MONITOR PRINTED CIRCUIT BOARD P173. OPERATIONAL CHECKS WERE GOOD PER BMM 26-10-01-101.