What was found
FLT 5451 - PFN-MCO - ON SHORT FINAL APPROACH TO MCO, CREW RECEIVED A 'TOO LOW GEAR' AURAL WARNING. INITIATED A GO AROUND AND REQUESTED THE RESCUE TRUCKS STANDBY. ALL OTHER GEAR INDICATIONS WERE NORMAL AND THE GPWS DID NOT ACTIVATE ON THE SECOND APPROACH. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE DEFERRED THE GPWS PER MEL 34-18. IN SUBSEQUENT MAINTENANCE, THE GPWS COMPUTER WAS REMOVED AND REPLACED. (M)