ASN Wikibase Occurrence # 215008
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| Date: | Saturday 11 August 2012 |
| Time: | 18:00 LT |
| Type: |  Robinson R22 Beta |
| Owner/operator: | Sierra Flite LLC |
| Registration: | N7135J |
| MSN: | 2899 |
| Year of manufacture: | 1999 |
| Total airframe hrs: | 1739 hours |
| Engine model: | Lycoming O-360 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Location: | Verdure, South Fork of Montezuma Creek, 6 miles S of Monticello, Utah -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Survey |
| Departure airport: | Salt Lake City International Airport, Salt Lake City, Utah (SLC/KSLC) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while flying in a canyon about 300 feet above ground level (agl), he spotted a black bear, which prompted him to maneuver the helicopter for a closer look. The pilot stated that he then descended to about 50 feet agl before flying upslope but allowed his airspeed to drop below 20 knots, which was outside the helicopter’s ability to hover. The pilot reported that he then received a low rotor rpm warning and took corrective action to maintain sufficient rotor rpm, but the helicopter began to settle. The pilot added that without sufficient room to gain airspeed and lift he was going to have to land the helicopter. During the landing, the helicopter impacted several trees and the ground before coming to rest on its right side. The tail section, tail rotor blades, main rotor blades, main cabin, and skids sustained extensive damage. The pilot reported no preimpact mechanical malfunctions or failures with the helicopter that would have precluded normal operation.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows: The pilot's failure to maintain adequate main rotor rpm while maneuvering at a low altitude, which resulted in the helicopter settling and subsequently colliding with the ground. Contributing to the accident was that the pilot had insufficient altitude to accomplish a successful recovery.
Accident investigation:
 |
|
Sources:
NTSB
2. FAA Registration: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N7135J
3. http://helihub.com/2012/08/11/11-aug-12-n7135j-robinson-r22-monticello-us-utah/
4. http://helicoptersafety.blogspot.com/2012/08/11-aug-12-n7135j-robinson-r22.html
5. http://www.airport-data.com/aircraft/photo/000433725.html
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Sep-2018 23:25 | Dr.John Smith | Added |
Corrections or additions? ... Edit this accident description
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