ASN Wikibase Occurrence # 293776
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 20 May 2005 |
| Time: | 15:00 LT |
| Type: |  Brantly Helicopter B-2B |
| Owner/operator: | Doug Geesey |
| Registration: | N2274U |
| MSN: | 439 |
| Engine model: | Lycoming VIO-360 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lakeview, Michigan -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Lakeview, MI (13C) |
| Lakeview, MI (13C) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter rolled over during a practice autorotation. The purpose of the flight was for the dual student to practice autorotations in preparation for a rotorcraft rating. He stated the accident occurred during the third autorotation of the flight. The student reported that during the autorotation the airspeed decreased below 40 miles per hour and the rotor rpm decayed. He stated the CFI took control of the throttle, rolling it on and off about three times, but they were too slow and low. He stated the helicopter impacted the ground "hard." The student reported that he did not notice a mechanical failure/malfunction with the helicopter, reporting that they just got too slow and the rotor rpm decayed. He continued to report, "I learned later that when practicing autorotations, I should not roll the throttle to idle, because there is a governor that keeps it at about 2,000 rpm when the collective is lowered." He stated his CFI never said anything to him about not rolling the throttle to idle. The CFI stated the engine quit during the simulated engine failure. He stated they made a full touchdown autorotation into a soft field and the left skid dug into the terrain causing the helicopter roll over.
Probable Cause: The dual student failed to maintain adequate rotor rpm during the practice autorotation and the instructor's delay in attempting remedial action. A factor associated with the accident was the soft terrain that was encountered.
Accident investigation:
 |
|
Sources:
NTSB CHI05CA120
History of this aircraft
Other occurrences involving this aircraft
| 17 November 2008 | N2274U | Private | 0 | Camas, Washington | |
sub |
| Heavy landing | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 13:21 | 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