ASN Wikibase Occurrence # 226855
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| Date: | Friday 26 August 2016 |
| Time: | 07:45 |
| Type: |  Robinson R44 II |
| Owner/operator: | Private |
| Registration: | N74805 |
| MSN: | 10934 |
| Year of manufacture: | 2005 |
| Total airframe hrs: | 5747 hours |
| Engine model: | Lycoming IO-540 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Kailua-Kona, Hawaii, HI -
 United States of America
|
| Phase: | |
| Nature: | Private |
| Departure airport: | Kona-Keahole Airport, HI (KOA/PHKO) |
| Kona-Keahole Airport, HI (KOA/PHKO) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During an instructional flight in the helicopter, the pilot under instruction set up for an approach and landing to a flat and smooth gravel road. Once the skids were on the ground, the pilot under instruction lowered the collective toward the FULL DOWN position. The helicopter then began to rock in a fore and aft motion. The flight instructor took the controls as the intensity of the rocking increased; the helicopter then ascended in uncontrollable flight. The flight instructor subsequently landed the helicopter on the gravel road; it came to rest upright about 20 to 30 ft and at a little more than a 45° angle from the initial touchdown point. The helicopter sustained substantial damage to the fuselage. Postaccident examination of the helicopter revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. Thus, the reason for the reported on-ground upset could not be determined.
Probable Cause: An on-ground upset for reasons that could not be determined because postaccident examination of the helicopter revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
Accident investigation:
 |
|
Sources:
NTSB
History of this aircraft
Other occurrences involving this aircraft
| 26 July 2016 | N74805 | 0 | Kona International Airport, HI | |
sub | |
| Ground resonance | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Jul-2019 19:35 | ASN Update Bot | Added |
| 10-Jun-2023 08:54 | Ron Averes | Updated |
Corrections or additions? ... Edit this accident description
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