ASN Wikibase Occurrence # 147966
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| Date: | Friday 24 August 2012 |
| Time: | 18:00 |
| Type: | Alliant Destiny XLT |
| Owner/operator: | Private |
| Registration: | N1674A |
| MSN: | 4C0633 |
| Engine model: | Rotax 582DCDI |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Test Hill, Silver Lake Park, Golden, MI -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was flying his powered parachute on a local flight when he encountered a strong and gusty tailwind. A video showed that the powered parachute cart then rocked fore and aft, while the parachute canopy moved fore and aft above the cart until the left side of the parachute canopy deformed and collapsed. The powered parachute then entered a descending left spiral. During the descent the left side of the parachute reinflated, and the powered parachute impacted terrain nose down with a partially inflated canopy. A postaccident examination of the wreckage and the video of the accident revealed no evidence of preimpact anomalies that would have precluded normal operation.
The powered parachute ram-air canopy retains its airfoil shape because of the relative wind airflow entering its front openings. Examination of the accident powered parachute revealed that modifications to lower the canopy's angle of attack had been made, to allow for quicker rotation and additional forward speed. However, these modifications decreased the canopy's angle of attack such that it would partially collapse when wind gusts were encountered.
Probable Cause: The partial deflation of the powered parachute canopy when the pilot flew the aircraft into an area with gusty wind conditions. Contributing to the accident were the modifications that changed the flying characteristics of the parachute.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=1674A
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Aug-2012 16:19 | Geno | Added |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 30-Jan-2017 17:55 | rvargast17 | Updated [Damage] |
| 28-Nov-2017 13:18 | ASN Update Bot | Updated [Operator, Other fatalities, Source, Damage, Narrative, Plane category] |
Corrections or additions? ... Edit this accident description
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