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NTSB Report
June 10, 1990 · Grumman G-164A · N6572
Bastrop, LA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 10, 1990
Injury Outcomes
1 injury (1 minor injury)
Location
Bastrop, LA
Aircraft
Grumman G-164A
Tail Number
N6572
Operator
Leroy Robinson
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
FTW90DRD12
THE AERIAL APPLICATION PILOT STATED THAT HE WAS IN A SLOW TURN TO THE LEFT LOOKING FOR THE FLAGMAN WHEN THE AIRPLANE 'BEGAN TO FALL.' HE ROLLED OUT OF THE TURN BUT WAS UNABLE TO MAINTAIN FLIGHT. FULL POWER WAS ADDED AND THE PILOT UNSUCCESSFULLY ATTEMPTED TO DUMP THE LOAD OF CHEMICAL. THE FORCED LANDING IN SOFT MUDDY TERRAIN RESULTED IN A NOSEOVER. THE OWNER OF THE AIRPLANE REPORTED THAT THE PILOT WAS ON THE GROUND APPROXIMATELY 20 MINUTES WITH THE ENGINE IDLING, AND THAT DURING TAKEOFF THE ENGINE DID NOT DEVELOP FULL POWER. HE FURTHER STATED THAT HE HAD CAUTIONED THE PILOT ABOUT CLEARING THE ENGINE BEFORE TAKEOFF. THE CHEMICAL DUMP LEVER WAS BLOCKED BY THE IMPROPERLY POSITIONED PRESSURE VALVE LEVER.
NTSB Probable Cause
THE PILOT'S IMPROPER ENGINE PROCEDURES DURING GROUND OPERATIONS AND PRIOR TO TAKEOFF WHICH RESULTED IN FOULED SPARK PLUGS.
Full Narrative
THE AERIAL APPLICATION PILOT STATED THAT HE WAS IN A SLOW TURN TO THE LEFT LOOKING FOR THE FLAGMAN WHEN THE AIRPLANE 'BEGAN TO FALL.' HE ROLLED OUT OF THE TURN BUT WAS UNABLE TO MAINTAIN FLIGHT. FULL POWER WAS ADDED AND THE PILOT UNSUCCESSFULLY ATTEMPTED TO DUMP THE LOAD OF CHEMICAL. THE FORCED LANDING IN SOFT MUDDY TERRAIN RESULTED IN A NOSEOVER. THE OWNER OF THE AIRPLANE REPORTED THAT THE PILOT WAS ON THE GROUND APPROXIMATELY 20 MINUTES WITH THE ENGINE IDLING, AND THAT DURING TAKEOFF THE ENGINE DID NOT DEVELOP FULL POWER. HE FURTHER STATED THAT HE HAD CAUTIONED THE PILOT ABOUT CLEARING THE ENGINE BEFORE TAKEOFF. THE CHEMICAL DUMP LEVER WAS BLOCKED BY THE IMPROPERLY POSITIONED PRESSURE VALVE LEVER.
Flight
Event TypeAccident
Event Time06:10 CDT
Nearest Airport0nm N
Runway27
Runway Length3000 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman G-164A
Tail NumberN6572
Aircraft CategoryAir
DamageDestroyed
OperatorLeroy Robinson
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R985-AN-1 · Reciprocating · 450
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 32 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility40 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter30.00 inHg
Weather SourcePILO