What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The aircraft developed a severe vibration in-flight while flying over the gulf of Mexico. The pilot landed the helicopter on the nearest offshore platform without incident. Subsequent investigation revealed that the tail rotor driveshaft/oil cooler bearing failed. Prior to its failure, the bearing had accumulated 223 hours total time, 33 hours since last inspection, 11 hours since the last lubrication, and 2 hours since a vibration check. The operator of the aircraft sent the bearing to Bell helicopter, fort worth, Texas, for further evaluation.
As the FAA filed it
(-23) THE AIRCRAFT DEVELOPED A SEVERE VIBRATION IN-FLIGHT WHILE FLYING OVER THE GULF OF MEXICO. THE PILOT LANDED THE HELICOPTER ON THE NEAREST OFFSHORE PLATFORM WITHOUT INCIDENT. SUBSEQUENT INVESTIGATION REVEALED THAT THE TAIL ROTOR DRIVESHAFT/OIL COOLER BEARING FAILED. PRIOR TO ITS FAILURE, THE BEARING HAD ACCUMULATED 223 HOURS TOTAL TIME, 33 HOURS SINCE LAST INSPECTION, 11 HOURS SINCE THE LAST LUBRICATION, AND 2 HOURS SINCE A VIBRATION CHECK. THE OPERATOR OF THE AIRCRAFT SENT THE BEARING TO BELL HELICOPTER, FORT WORTH, TEXAS, FOR FURTHER EVALUATION.