ASN Wikibase Occurrence # 289319
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: | Friday 13 May 2011 |
| Time: | 08:17 LT |
| Type: |  Hughes 369D |
| Owner/operator: | Airlift Helicopters Of Alaska, Inc. |
| Registration: | N124AL |
| MSN: | 290455D |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 11086 hours |
| Engine model: | Rolls-Royce Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Columbia, California -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Fresno Yosemite International Airport, CA (FAT/KFAT) |
| Reno/Tahoe International Airport, NV (RNO/KRNO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that the helicopter was in cruise flight at 12,500 feet mean sea level over mountainous terrain when power stopped being transmitted to the main rotor system. He performed an autorotation to an open area. During the landing, the tail rotor sustained damage to both blades as they went through about 1 foot of snow. After landing, the engine was still running but was not spinning the main rotor blades. Postaccident examination of the airframe revealed no anomalies that would have precluded normal operation. The drive train was fully functional. The engine was run in a test cell, which confirmed that it met specifications for all parameters including performance. The reason for the loss of engine power could not be determined.
Probable Cause: The loss of power transmission to the main rotor for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation of the helicopter.
Accident investigation:
 |
|
Sources:
NTSB WPR11LA220
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Oct-2022 12:20 | 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