Monnett John T Jr SONEX SA accident near Oshkosh, WI
On June 2, 2015, a Monnett John T Jr SONEX SA (airplane) was involved in an accident near Oshkosh, WI. 2 people died. Damage to the aircraft: substantial.
- Date
- June 2, 2015
- Place
- Oshkosh, WI
- Aircraft
- Monnett John T Jr SONEX SA · Airplane
- Injuries
- 2 fatal, 0 serious, 0 minor
- Damage
- Substantial
- Position
- 43.992°N, 88.546°W
- NTSB ID
- 20150602X70621
Official records · CEN15FA249
- Public docket: reports, statements and exhibits from the investigation
NTSB summary
HISTORY OF FLIGHTOn June 2, 2015, about 1520 central daylight time, a Sonex SA amateur-built airplane, N123SX, impacted unoccupied, parked military vehicles at a manufacturing facility shortly after departing the Wittman Regional Airport (OSH), Oshkosh, Wisconsin. The private pilot and pilot rated passenger were fatally injured, and the airplane was substantially damaged. The airplane was registered to and operated by Sonex Aircraft LLC, under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed for the flight which operated without a flight plan. The local flight was originating at the time of the accident. According to OSH air traffic control tower personnel, the airplane departed runway 9 from the intersection of runway 9 and runway 13. After clearing the airplane for takeoff, the tower controller focused his/her attention on inbound traffic and did not witness the accident. A surveillance video from Oshkosh Defense manufacturing facility captured a portion of the accident flight. The video captured the airplane during its initial climb from the runway. In several of the frames, a wisp of white appears to briefly emanate from the airplane. PERSONNEL INFORMATIONThe pilot, age 40, held a private pilot certificate with ratings for airplane single engine land, airplane single engine sea, and gliders. He was issued a third class medical certificate on February 22, 2013, without any limitations. As of March 15, 2015, the pilot had accrued 715 hours of total time. He was estimated to have at least 540 hours in
Probable cause
The pilot's failure to maintain sufficient airspeed following a loss of engine power during initial takeoff climb, which resulted in the airplane's wing exceeding its critical angle-of-attack and a subsequent aerodynamic stall. The reason for the loss of engine power could not be determined because examination of the wreckage revealed no mechanical deficiencies. Contributing to the accident was th
More accidents in WI
- Douglas DC-9-14, Sep 6, 1985
- Beech 200, Nov 16, 1987
- Piper PA-28-140, Feb 3, 1991
- Piper PA-32R-300, Aug 19, 1990
- Cessna 421C, Jul 1, 2017
Browse: Wisconsin
Source: NTSB aviation accident database (US government, public domain). Findings may be preliminary or later revised by the NTSB. Not a complete global record.
