ASN Wikibase Occurrence # 286492
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| Date: | Thursday 8 October 2009 |
| Time: | 08:00 LT |
| Type: |  Schweizer 269C-1 |
| Owner/operator: | |
| Registration: | N1835E |
| MSN: | 0255 |
| Year of manufacture: | 2006 |
| Total airframe hrs: | 1750 hours |
| Engine model: | Lycoming HIO-360-G1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lewiston, Maine -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Auburn Airport, ME (LEW/KLEW) |
| Auburn Airport, ME (LEW/KLEW) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot of a helicopter was conducting a non-revenue sightseeing flight for one passenger. After lifting off, the pilot stated that he was hovering eastbound with the winds out of the west. A METAR taken on the airport approximately 5 minutes before the accident indicated the wind was from 340 degrees at 11 knots with gusts to 16 knots. The pilot further stated that the helicopter's nose made a sudden yaw to the right, which could not be corrected with reduction of throttle and full left pedal application. The helicopter touched down after a 270 degree turn, came to rest upright, with substantial damage to the main rotor blades, skids and tailboom. According to a Federal Aviation Administration Advisory Circular (AC) 90-95 titled "Unanticipated Right Yaw in Helicopters", operation of a helicopter with a tailwind as reported by the pilot or with a left quartering tailwind as determined by the METAR and the pilot's statement can result in unanticipated right yaw or loss of tail rotor effectiveness (LTE).
Probable Cause: The loss of tail rotor effectiveness (LTE) resulting from hovering the helicopter in a tailwind.
Accident investigation:
 |
|
Sources:
NTSB ERA10CA010
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-Oct-2022 11:34 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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