ASN Wikibase Occurrence # 298709
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| Date: | Tuesday 11 July 2000 |
| Time: | 09:05 LT |
| Type: |  Robinson R-22B |
| Owner/operator: | Private |
| Registration: | N2365S |
| MSN: | 0527 |
| Year of manufacture: | 1985 |
| Engine model: | Lycoming HO-320 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | HARPSWELL, Maine -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | SOUTH HARPSWELL, ME |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was traveling forward in a Robinson R22B at an airspeed of 10 to 20 knots, and an altitude of 230 feet above the ground, with a 15 to 21 knot left-quartering tailwind. The helicopter began to rotate to the right. After three rotations the pilot was unable to recover, and the helicopter impacted terrain. FAA Advisory Circular (AC) 90-95 stated that loss of tailrotor effectiveness (LTE) was a critical, low-speed aerodynamic flight characteristic which could result in an uncommanded rapid yaw rate, and loss of aircraft control. It also stated that all single main rotor helicopters were susceptible to loss of tail rotor effectiveness (LTE). The AC advised pilots that when maneuvering between hover and 30 knots to avoid: left crosswinds, tailwinds, and high power settings at low airspeeds.
Probable Cause: The pilot-in-command's improper in-flight decision to maneuver at a low airspeed with a left-quartering tailwind which resulted in a loss of tailrotor effectiveness.
Accident investigation:
 |
|
Sources:
NTSB NYC00LA191
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 21:43 | ASN Update Bot | Added |
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