As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BWI - FLT 4923 - CREW AND PASSENGERS HEARD LOUD SOUND. CAPTAIN THEN NOTICED THE LEFT ENGINE EGT WAS 800 DEGREES WITH THE TORQUE DECREASING. LEFT POWER LEVER WAS PULLED BACK AND THE EGT STAYED AT 800 DEGREES, LEFT ENGINE WAS SHUT DOWN. AIRCRAFT WAS ON FINAL APPROACH INTO BWI. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED THE LEFT ENGINE. (X)