ASN Wikibase Occurrence # 356613
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| Date: | Friday 4 October 1996 |
| Time: | 17:30 LT |
| Type: | Young COZY MK IV |
| Owner/operator: | Private |
| Registration: | N96PJ |
| MSN: | 203 |
| Year of manufacture: | 1996 |
| Total airframe hrs: | 17 hours |
| Engine model: | Lycoming O-360-A1G6D |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Pueblo, CO -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Unknown |
| Departure airport: | , CO (KPUB) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, he was practicing slow flight and stalls at 5,000 feet above ground level (10,000 feet msl). The only thing he could recall was that the 'main wing stalled' and that the canard was supposed to stall first. The nose pitched up, and he was unable to break the stall. After examining the wreckage, the airplane designer and an FAA airworthiness inspector concluded (1) the canard wing had too low an angle-of-incidence, (2) three of six vortilons had been removed from the main wing, (3) the pilot erroneously calculated the empty weight center of gravity (CG), making all other CG calculations incorrect, and (4) as fuel flowed towards the aft portion of the fuel tank during the stall, the CG moved 1.1 inches beyond the aft CG limit. The designer concluded that the aircraft had not been built according to the plans, but rather was 'converted' to an 'Aerocanard...an unauthorized, unapproved, rip-off design.' The pilot had about 400 hours of flight time in various Cozy aircraft, but he had accrued only about 17 hours in the Cozy MK IV.
Probable Cause: the pilot/builder's improper design change which resulted in a loss of control following an intentional stall. A factor was an erroneous weight-and-balance calculation.
Accident investigation:
 |
|
Sources:
NTSB FTW97LA009
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Mar-2024 09:05 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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