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NTSB Report
September 7, 1983 · Grumman G-164A · N4698
Estill, SC
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 7, 1983
Injury Outcomes
No injuries (1 uninjured)
Location
Estill, SC
Aircraft
Grumman G-164A
Tail Number
N4698
Injuries
None
Aircraft Damage
Destroyed
NTSB Number
ATL83LA358
DURING A SWATH RUN, THE ACFT BEGAN TO LOSE POWER, SO THE PLT ABORTED THE MISSION & STARTED BACK TO THE ARPT TO LAND. HOWEVER, BEFORE REACHING THE ARPT, THE ENG QUIT RUNNING & THE PLT LANDED IN A FIELD. DURING THE LANDING, THE ACFT WAS EXTENSIVELY DAMAGED. AN INVESTIGATION REVEALED THAT THE OIL RING ON THE # 3 PISTON WAS BROKEN, BUT THE RING WAS STILL IN THE PISTON GROOVE & THERE WAS NO DAMAGE NOTED TO THE PISTON LAND OR CYLINDER WALL. A PARTIAL DISASSEMBLY OF THE CARBURETOR REVEALED THERE WAS APRX 2 OUNCES OF FLUID IN THE BOWL. APPRX 1/4 OF THE FLUID WAS WATER. EXCEPT FOR SOME SOOT ON THE SPARK PLUGS, NO OTHER DISCREPANCIES OF THE ENG WERE FOUND.
Full Narrative
DURING A SWATH RUN, THE ACFT BEGAN TO LOSE POWER, SO THE PLT ABORTED THE MISSION & STARTED BACK TO THE ARPT TO LAND. HOWEVER, BEFORE REACHING THE ARPT, THE ENG QUIT RUNNING & THE PLT LANDED IN A FIELD. DURING THE LANDING, THE ACFT WAS EXTENSIVELY DAMAGED. AN INVESTIGATION REVEALED THAT THE OIL RING ON THE # 3 PISTON WAS BROKEN, BUT THE RING WAS STILL IN THE PISTON GROOVE & THERE WAS NO DAMAGE NOTED TO THE PISTON LAND OR CYLINDER WALL. A PARTIAL DISASSEMBLY OF THE CARBURETOR REVEALED THERE WAS APRX 2 OUNCES OF FLUID IN THE BOWL. APPRX 1/4 OF THE FLUID WAS WATER. EXCEPT FOR SOME SOOT ON THE SPARK PLUGS, NO OTHER DISCREPANCIES OF THE ENG WERE FOUND.
Flight
Event TypeAccident
Event Time18:22 EDT
Nearest Airport3nm NW
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman G-164A
Tail NumberN4698
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-1340-AN1 · Reciprocating · 600
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 43 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind270° @ 3 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO