As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1212, DFW-PHL: DURING CLIMB, RECEIVED ENGINE 1 FIRE WARNING. SHUT DOWN NUMBER 1 ENGINE AND RETURNED TO FIELD. NO EVIDENCE OF FIRE NOTED. HEAT DAMAGE FROM BLEED LEAK TO ENGINE HARNESSES WAS NOTED. MAINTENANCE FERRIED TO PHL. REPLACED THE NUMBER ONE ENGINE.