As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
( 2005-5-1) PILOT NOTICED VIBRATION AND RUMBLE COMING FROM THE MAIN TRANSMISSION AREA ON TAKEOFF. MECHANIC DID TROUBLE TROUBLESHOOTING PROCEDURES AND NOTICED ONE OF THE FLEX PLATES ON THE MAIN DRIVE SHAFT HAD SNAPPED CAUSING THE DRIVE SHAFT TO BE IN FAIL SAFE MODE. DRIVE SHAFT WAS REPLACED AND PILOT CONTINUED. (K)