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NTSB Report
July 27, 2016 · Alon A2 Undesignat · N5690F
Alamosa, CO
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
July 27, 2016
Injury Outcomes
No injuries (1 uninjured)
Location
Alamosa, CO
Aircraft
Alon A2 Undesignat (1966)
Tail Number
N5690F
Injuries
None
Aircraft Damage
Substantial
NTSB Number
GAA16CA394
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.
NTSB 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.
Full Narrative
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.
Flight
Event TypeAccident
Event Time07:15 MDT
Nearest AirportLas Arenas Earth And Sky Obser (1nm W)
Runway20
Runway Length2700 ft
Runway Width40 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAlon A2 Undesignat
Tail NumberN5690F
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · C-90 · Reciprocating · 90
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 63 · Third Class · None
Conditions
ConditionsVMC
LightDaylight
Wind260° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point48 / 45 C
Altimeter30.39 inHg
Observation Time12:52
Weather SourceWFAC