As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT ENG FIRE FAULT LIGHT ILLUMINATED INTERMITTENTLY TO STEADY, BECAME MORE STEADY AS FLT CONTINUED ON AIR RETURN TO EWR. REMOIVED AND REPLACED "UPPER FIRE DETECTOR ELEMENT "A". PER AMM 26-11-01 OPS CHECK GOOD. NO FAULTS NOTED AT THIS TIME. ALL INDICATIONS NORMAL. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1526285 SN OFF 07754 IPC REFERENCE.