As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLT, NR 2 FIRE WARNING ILLUMINATED INTERMITTENTLY. B-LOOP DID NOT TEST. CHANGED TO LOOP "A". NORMAL OPS. TRANSFER NR 2 ENG B-SYS FIRE DET TO DMI 35399, PER MEL 26-2-3, CAT B. PLACARD INSTALLED. REPLACED BROKEN CONNECTOR AT LOWER RT HOT SECTION B-LOOP PER WDM 26-01-01. SYS CHECKS SERV PER DC-8 M/M/S 26-10-01. NO FURTHER DEFECTS FOUND. DMI 35399 CLEARED. PLACARD REMOVED. P/N 878239-02.