As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENG FIRE WARNING BELL RANG AND WARNING LIGHT CAME ON INTERMITTENTLY. CREW WAS ABLE TO DETERMINE NO FIRE EXISTED. FLT DIVERTED TO LIM AND LANDED WITHOUT FURTHER INCIDENT. MAINT FOUND UPPER (PYLON) FIRE LOOP CHAFING. CORRECTED. CHAFING AND SYS OPS CHK. NORMAL IAW DACO M/M 26-10-0.