NTSB Identification: SEA99LA166.
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Accident occurred Saturday, September 18, 1999 in IONA, ID
Probable Cause Approval Date: 11/02/2000
Aircraft: Pitts 11, registration: N11PU
Injuries: 1 Fatal.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
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.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot-in-command's delayed recovery from a snap roll. A contributing factor was the low altitude at which the maneuver was initiated. Full narrative available
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