As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - CREW REPORTED TAIL COMPARTMENT HIGH TEMPERATURE LIGHT ILLUMINATED. EMERGENCY DECLARED FLIGHT RETURNED BOS LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. SECURED AND TORQUED RIGHT INTERMEDIATE STAGE SENSE LINE THAT HAD BACKED OFF. SYSTEM GROUND CHECK NORMAL OPERATION.