As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - FLT 48 - DURING FLIGHT, RIGHT ENGINE FIRE DETECTION LOOP 2 CYCLED ON AND OFF. ON STEADY FOR APPROXIMATELY 10 MINUTES THEN STARTED TO CYCLE ON AND OFF. DIVERTED AND LANDED JFK WITHOUT INCIDENT. REPLACED FIRE DETECTION LOOP 2 HARNESS. SYSTEM GROUND CHECK NORMAL OPERATION. REPLACED ALL THREE DETECTORS AS PRECAUTION. (M)