ASN Wikibase Occurrence # 291710
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.
| Date: | Monday 16 October 2006 |
| Time: | 11:10 LT |
| Type: |  Robinson R22 BETA |
| Owner/operator: | Private |
| Registration: | N224VR |
| MSN: | 3038 |
| Year of manufacture: | 2000 |
| Total airframe hrs: | 1472 hours |
| Engine model: | Lycoming O-360-J2A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Monticello, Utah -
 United States of America
|
| Phase: | Unknown |
| Nature: | Executive |
| Departure airport: | Dove Creek, CO (8V6) |
| Lisbon Valley, UT | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot said he was cruising at 8,500 feet msl (mean sea level) and at 65 KIAS (knots indicated airspeed) when he experienced a "slight yaw oscillation." He decided to make a precautionary landing and initiated a descent. The oscillations increased to about one yaw per second. Before reaching the selected landing site, the "low-rotor RPM horn/light activated. When the pilot lowered the collective control to recover, he got an engine and rotor overspeed indication of 110 per cent. The pilot made a 180-degree turn and autorotated from 800 feet agl. The helicopter landed on rocky terrain, surrounded by pinon and juniper trees. Main and tail rotor and tail rotor blades struck the trees, separating the tail rotor blades and gearbox from the tail boom. According to the helicopter manufacturer, nothing was found that would explain the oscillations described by the pilot, or why the low-rotor RPM horn/light activated.
Probable Cause: an airframe vibration for reasons undetermined, resulting in the pilot performing a precautionary landing, and obstacle clearance not possible.
Accident investigation:
 |
|
Sources:
NTSB DEN07CA013
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Oct-2022 18:02 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation