ASN logo
ASN Wikibase Occurrence # 122378
Last updated: 26 August 2021
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Type:Silhouette image of generic B06 model; specific model in this crash may look slightly different
Bell 206L-4 LongRanger IV
Owner/operator:PHI Inc
Registration: N266P
MSN: 52271
Fatalities:Fatalities: 0 / Occupants: 3
Aircraft damage: Substantial
Location:3 nautical miles south of Gulf Shores, AL -   United States of America
Phase: En route
Departure airport:Mobile Block 114CC, GM
Destination airport:Mobile Block 114CC, GM
Investigating agency: NTSB
Shortly after liftoff from the production platform helideck, the pilot observed that the helicopter began an uncommanded slow yaw to the right. The pilot applied full left pedal, which had no effect. He lowered the collective, rolled the throttle to idle, and deployed the emergency floats. The helicopter impacted the water and rolled over. A postaccident examination of the wreckage did not reveal evidence of a mechanical malfunction or failure. Tail rotor system continuity was confirmed. The pilot reported that, just prior to the loss of directional control, there was a left, quartering headwind. This condition could have put the helicopter in an area of main rotor disc interference with the tail rotor, which could have resulted in a loss of tail rotor effectiveness.
Probable Cause: The pilotís operation of the helicopter with a left, quartering headwind, resulting in conditions conducive to a loss of tail rotor effectiveness.



Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 8 months
Download report: Final report

Revision history:

15-May-2011 07:20 gerard57 Added
15-May-2011 07:22 gerard57 Updated [Location]
17-May-2011 09:32 RobertMB Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Damage]
21-Dec-2016 19:25 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
27-Nov-2017 16:54 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

Corrections or additions? ... Edit this accident description