NTSB Identification: CEN10IA438
Nonscheduled 14 CFR Part 135: Air Taxi & Commuter
Incident occurred Monday, July 26, 2010 in Gulf of Mexico, LA
Probable Cause Approval Date: 10/04/2012
Aircraft: BELL 206, registration: N317RL
Injuries: 3 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

During takeoff from an offshore oil platform, the pilot reported a loss of main rotor rpm. The pilot activated the emergency float system and initiated an autorotation to the water. Upon touchdown, the engine was still operating. The pilot shut down the engine and prepared the passengers to evacuate. All three occupants safely evacuated the helicopter (which was upright on its skid-mounted float system) and boarded the emergency life raft that the pilot had inflated. The helicopter remained upright floating on the water and was later recovered and transported to the operator’s on-shore maintenance facility. The operator did immediate fuel quality tests at the facility where the helicopter had most recently been refueled and found no problems.

An examination of the helicopter drive systems and a test run of the engine did not reveal any preincident anomalies that would have precluded normal operation of the main rotor system. The cause of the loss of main rotor rpm could not be determined.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

The loss of main rotor rpm during takeoff for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies.

Full narrative available

Index for Jul2010 | Index of months