As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERMITTENT FIRE INDICATION ON NR 1 ENG FIRED BOTH BOTTLES AND SHUT DOWN ENG FIRE INDICATIONS STILL WERE INTERMITTENT. WHEN FIRE LIGHT IN HANDLE INTERMITTENT WENT OUT, FIRE TEST WOULD NOT TEST. REMOVED AND REPLACED NR 1 ENG FIRE SENSING ELEMENTS IAW DC-8 SEVENTY SERIES M/M 26-10-1. NR 1 ENG FIRE WARNING SYSTEM OPS CHECKS GOOD IAW DC-8 SEVENTY SERIES M/M 26-10-1. NO DEFECTS NOTED.