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NTSB Report
August 22, 2011 · Air Tractor AT-502B · N113AA
Matthews, MO
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
August 22, 2011
Injury Outcomes
No injuries (1 uninjured)
Location
Matthews, MO
Aircraft
Air Tractor AT-502B
Tail Number
N113AA
Operator
Ag Air
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN11CA589
The pilot of the aerial application flight reported that the airplane was loaded with 300 gallons of chemical and 100 gallons of fuel. He stated that he powered the airplane up for takeoff, all instrument readings were good, and the airplane took off. He stated that after liftoff, while in ground effect, a wind shear caused the right wing of the airplane to drop, causing the airplane to strike a ditch. The recorded wind speed at an airport located 27 miles from the accident site was 7 knots. A postaccident examination of the airplane revealed that the fuselage was buckled and the right wing was bent aft. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.
NTSB Probable Cause
Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Lateral/bank control-Not attained/maintained - C
Full Narrative
The pilot of the aerial application flight reported that the airplane was loaded with 300 gallons of chemical and 100 gallons of fuel. He stated that all of the instrument readings were good when he powered the airplane up for takeoff. He stated that after liftoff, while in ground effect, a wind shear caused the right wing of the airplane to drop, and the airplane struck a ditch. The recorded wind speed at an airport located 27 miles from the accident site was 7 knots. Postaccident examination of the airplane revealed the fuselage was buckled, and the right wing was bent aft. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Flight
Event TypeAccident
Event Time17:30 CDT
Nearest AirportPrivate Airstrip (0nm)
Runway18
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAir Tractor AT-502B
Tail NumberN113AA
Aircraft CategoryAir
DamageSubstantial
OperatorAg Air
Operating RulePart 137
Engines1
Engine TypeTurboprop
Engine DetailsPratt & Whitney · PT6A-34AG · Turboprop · 750
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 25 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 7 kt
Visibility10 sm
CeilingNone
Altimeter29.96 inHg
Observation Time22:53
Weather SourceWFAC