As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1268, PHL-SJU: ON CLIMBOUT, CREW RECEIVED MASTER WARNING, FIRE WARNING, AND FIRE BELL INTERMITTENTLY. FLIGHT RETURNED TO PHL. MAINTENANCE REPLACED THE NR 1 AND NR 2 TURBINE OVERHEAT DETECTORS ON THE RIGHT ENGINE AND FIRE/OVERHEAT CARD M10426.