As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5499 - JAX-MCO - JUST AFTER TAKEOFF, THE LEFT ENGINE MADE A LOUD BAND AND SEEMED TO LOSE POWER. SPARKS WERE SEEN COMING FROM THE EXHAUST STACKS. CREW DECLARED AN EMERGENCY AND SHUTDOWN THE ENGINE. AIRCRAFT RETURNED TO FIELD WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE GAS GENERATOR. (M)