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| Date: | Saturday 18 September 1999 |
| Time: | 09:20 LT |
| Type: | Pitts S-1-11 Super Stinker |
| Owner/operator: | Private |
| Registration: | N11PU |
| MSN: | ADE 0001 |
| Total airframe hrs: | 683 hours |
| Engine model: | Lycoming IO-540-X |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Iona, ID -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Idaho Falls, ID (KIDA) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A videotape of the accident showed the aircraft successfully completing a series of two counter-clockwise aileron rolls, immediately followed by two clockwise snap rolls. During the second run of maneuvers, initiated from an approximate altitude of 100-200 feet AGL, the aircraft recovered from the final snap roll in a 90 degree right-wing down, nose low attitude rather than the wings level attitude of the previous maneuver. One to two seconds later, the aircraft returned to a wings-level attitude having lost approximately half of its available altitude. The nose pitched back to a flat attitude and the aircraft impacted the ground. The aircraft's engine was heard to rev on the tape about a second after the impact.
Probable Cause: The pilot-in-command's delayed recovery from a snap roll. A contributing factor was the low altitude at which the maneuver was initiated.
Accident investigation:
 |
|
Sources:
NTSB SEA99LA166
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency, ] |
| 14-Dec-2017 09:03 | ASN Update Bot | Updated [Operator, Source, Narrative, ] |
| 07-Apr-2024 17:53 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Source, Narrative, Category, Accident report, ] |
Corrections or additions? ... Edit this accident description
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