ASN Wikibase Occurrence # 122177
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| Date: | Sunday 8 May 2011 |
| Time: | 14:30 LT |
| Type: |  Robinson R44 Clipper II |
| Owner/operator: | Colorado Helicopter Inc |
| Registration: | N921JM |
| MSN: | 10565 |
| Year of manufacture: | 2004 |
| Total airframe hrs: | 1185 hours |
| Engine model: | Lycoming IO-540 SER |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Location: | Lookout Mountain, Golden, CO -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Survey |
| Departure airport: | Denver, CO (KBJC) |
| Denver, CO (KBJC) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter was following participants in a downhill skateboard race in mountainous terrain. The pilot had just performed a left-pedal turn and the helicopter was facing upslope to the mountain. The low rotor warning sounded and the pilot lowered the collective and increased throttle. The pilot stated that the engine did not respond so he continued to lower the collective and looked for a place to land. During the forced landing on the downsloping terrain the helicopter came to rest on its nose, resulting in substantial damage to the main rotor, skid tubes, and tail boom. Postaccident examination of the helicopter, engine, and systems, revealed no anomalies. The density altitude was calculated to be 10,600 feet. The pilot calculated the in-ground-effect hover to be 8,500 feet pressure altitude, the out-of-ground-effect hover to be 5,000 feet pressure altitude, and estimated the gross weight to be 2,320 pounds.
Probable Cause: The pilot’s decision to operate the helicopter at a high density altitude near terrain, which resulted in a settling with power condition.
Accident investigation:
 |
|
Sources:
NTSB
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https://www.flickr.com/photos/skyhawkpc/4411783121/in/photostream/
https://www.flickr.com/photos/skyhawkpc/4960976752
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-May-2011 07:51 | RobertMB | Added |
| 10-May-2011 02:46 | Anon. | Updated [Operator, Total occupants, Departure airport, Destination airport, Source, Embed code, Damage, Narrative] |
| 10-May-2011 06:54 | rotorspot | Updated [Aircraft type] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 16:54 | ASN Update Bot | Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
| 16-Jan-2018 10:22 | Iceman 29 | Updated [Time, Source, Embed code] |
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