Probable cause
The pilot's failure to maintain aircraft control during takeoff on an uneven runway surface, which resulted in it becoming airborne prematurely, an aerodynamic stall, and impact with terrain.
NTSB analysis
The pilot reported that during the takeoff roll from a private, dirt airstrip the airplane encountered a bump and became airborne prematurely. The pilot further reported that he attempted to reduce the angle of attack, but the left wing aerodynamically stalled and the airplane impacted terrain.
The airplane sustained substantial damage to the fuselage, left wing, right wing and aileron, and right vertical stabilizer.
The pilot reported that there were no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.
Text from the NTSB. Open the NTSB docket for GAA16CA394 for the full record.
Event
- Date
- Jul 27, 2016
- Type
- Accident
- Place
- Alamosa, Colorado
- Nearest airport
- Las Arenas Earth And Sky Obser (2CO2)
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Alon A2
- N-number
- N5690F
- Category
- Airplane
- Year built
- 1966
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Personal
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.