ASN Wikibase Occurrence # 122378
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| Date: | Friday 13 May 2011 |
| Time: | 11:20 |
| Type: |  Bell 206L-4 LongRanger IV |
| Owner/operator: | PHI Inc |
| Registration: | N266P |
| MSN: | 52271 |
| Year of manufacture: | 2002 |
| Total airframe hrs: | 8870 hours |
| Engine model: | Allison 250-C30 SER |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | 3 nautical miles south of Gulf Shores, AL -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Mobile Block 114CC, GM |
| Mobile Block 114CC, GM | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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 pilot’s operation of the helicopter with a left, quartering headwind, resulting in conditions conducive to a loss of tail rotor effectiveness.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 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] |
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