As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED DURING TAKE-OFF TAIL COMPARTMENT TEMPERATURE HIGH LIGHT ILLUMINATED WITH ELECTRIC SMELL IN THE CABIN. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND RIGHT FLOW CONTROL CHECK VALVE SEAL BLOWN OUT. REPLACED CHECK VALVE ASSEMBLY. SYSTEM GROUND CHECK NORMAL OPERATION.