As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TPA - CREW REPORTED ON CLIMB OUT AT FL 250 LEFT ENGINE EMITTED LOUD BANG, RPM ROLLED BACK TO SUB-IDLE AND EGT BEGAN TO SLOW CLIMB. SHUTDOWN ENGINE AT THAT POINT (SINGLE ENGINE TIME 13 MINUTES). EMERGENCY DECLARED RETURNED TPA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT HAND ENGINE. SYSTEM GROUND CHECK NORMAL OPERATION.