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NTSB Report
June 1, 2006 · Grumman G-164B · N14RY
Dighton, KS
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
June 1, 2006
Injury Outcomes
1 injury (1 minor injury)
Location
Dighton, KS
Aircraft
Grumman G-164B
Tail Number
N14RY
Operator
Root Spraying Service
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN06CA081
The airplane was taking off on an aerial application flight. Shortly after lifting off, the airplane's engine lost power. The commercial pilot set the airplane down on the runway toward the departure end. The airplane went off the end of the runway and into a wheat field. The airplane's main gear tires sank into the soft wet soil and the airplane subsequently nosed over causing the engine to fracture and separate from the fuselage and crushing the vertical stabilizer and rudder downward. The pilot sustained minor injuries. Visual meteorological conditions prevailed at the time of the accident. An examination of the airplane's engine revealed that the rocker arm boss on the number 1 cylinder had fractured leaving the exhaust valve on the cylinder closed and resulting in the subsequent engine failure.
NTSB Probable Cause
The broken rocker arm boss causing the number 1 cylinder exhaust valve to stay closed and subsequently the engine failed. A factor contributing to the accident was the soft field the airplane set down in.
Full Narrative
The airplane was taking off on an aerial application flight. Shortly after lifting off, the airplane's engine lost power. The commercial pilot set the airplane down on the runway toward the departure end. The airplane went off the end of the runway and into a wheat field. The airplane's main gear tires sank into the soft wet soil and the airplane subsequently nosed over causing the engine to fracture and separate from the fuselage and crushing the vertical stabilizer and rudder downward. The pilot sustained minor injuries. Visual meteorological conditions prevailed at the time of the accident. An examination of the airplane's engine revealed that the rocker arm boss on the number 1 cylinder had fractured leaving the exhaust valve on the cylinder closed.
Flight
Event TypeAccident
Event Time16:00 MDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft
AircraftGrumman G-164B
Tail NumberN14RY
Aircraft CategoryAir
DamageSubstantial
OperatorRoot Spraying Service
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsContinental · R-975 · Reciprocating
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 29 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0