As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
99-119 - NR 1 FIRE WARN ILLUM. BELL SOUND INTERMITTENT. THIS IS A REPEAT OCCURRENCE, FIRE WARNING SYS CK PER CKLIST OPER NORM. INSTALL NR 1 ENG FIREWALL DETECTOR LOOP PER MM 26-11-012-4. RAN HIGH PWR ENG RUN ON NR 1 ENG, NO DEFECTS NOTED. OK FOR SERVICE.