As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - INFLIGHT T96/14APR - LEFT ENGINE OVERHEAT INDICATION ILLUMINATED DURING CLIMB. RETURNED TO BOS AND LANDED WITHOUT INCIDENT. AIRCRAFT TAKEN OUT OF SERVICE. FOUND PRECOOLER CLAMPS LOOSE AND EVIDENCE OF AIR LEAKAGE AT PT6 VALVE. REPLACED PT6 VALVE DUCT AND TIGHTENED PRECOOLER CLAMPS. SYSTEM GROUND CHECKED NORMAL OPERATION.