As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ILE - FLT 3997 - PILOT REPORTED THAT UPON TAXI, THE RIGHT ENGINE EMITTED A LOW GRADE RUMBLE/VIBRATION, AT APPROXIMATELY 60 PERCENT. THE AIRCRAFT RETURNED TO THE GATE, AND MAINTENANCE INSPECTED AND FOUND THE 2ND STAGE POWER TURBINE TO BE DAMAGED. MAINTENANCE REMOVED AND REPLACED THE RIGHT ENGINE AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)