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NTSB Report
June 3, 2012 · Grumman G-164A · N5291
Riverton, WY
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
June 3, 2012
Injury Outcomes
No injuries (1 uninjured)
Location
Riverton, WY
Aircraft
Grumman G-164A
Tail Number
N5291
Operator
Sky Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR12CA242
The pilot, who was flying a tailwheel-equipped agricultural aerial application airplane, was landing on a dirt airstrip in order to take on a load of application chemical. After he landed on the main gear and lowered the tailwheel to the surface, the airplane started to veer toward the side of the runway. The pilot was unable to keep the airplane from departing the side of the runway, and, because it was heading toward a big gully, he applied as much braking force as possible. As he applied the braking force, the airplane nosed over onto its back, which resulted in substantial damage to the upper wing and the vertical stabilizer. According to the pilot, there was no malfunction or anomaly associated with the airplane's directional control system or its braking system.
NTSB Probable Cause
The pilot's loss of directional control during the landing roll and his deliberate application of excessive braking pressure, which resulted in a noseover.
Full Narrative
The pilot, who was flying a tail wheel equipped agricultural aerial application airplane, was landing on a dirt strip in order to take on a load of application chemical. After landing on the main gear and lowering the tail wheel to the surface, the airplane started to veer toward the side of the runway. The pilot was unable to keep the airplane from departing the side of the runway, and because it was heading toward a big gully, he applied as much braking force as he was able. As he applied the braking force, the airplane nosed over onto its back, resulting in substantial damage to the upper wing and the vertical stabilizer. According to the pilot, there was no malfunction or anomaly associated with the airplane's directional control systems or its braking system.
Flight
Event TypeAccident
Event Time06:00 MDT
Nearest AirportHidden Valley Airport (0nm)
Runway34
Runway Length4000 ft
Runway Width55 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman G-164A
Tail NumberN5291
Aircraft CategoryAir
DamageSubstantial
OperatorSky Aviation
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-985 SERIES · Reciprocating · 450
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 28 · Second Class · None
Conditions
ConditionsVMC
LightDawn
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point61 F / 0 C
Altimeter0
Weather SourcePILO