As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - DURING CRUISE, NR 1 NACELLE FIRE DETECTOR FAULT LIGHT ILLUMINATED WITH TEMPERATURES IN THE FAULT RANGE. THE NR 1 ENGINE FIREWARNING SOUNDED. SHUT DOWN NR 1 ENGINE AND DISCHARGED BOTH EXTINGUISHER BOTTLES. FOUND BOTH DETECTORS SHORTED. REPLACED BOTH DETECTORS, MFG P/N 60B00023-163 AND P/N 60B00023-166. PERFORMED POWER RUNUP AND NACELLED DETECTOR FAULT AND FIREWARNING SYSTEMS CHECKED NORMAL.