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NTSB Report
August 2, 1989 · Grumman G-164A · N952X
Sullivan, IN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 2, 1989
Injury Outcomes
No injuries (1 uninjured)
Location
Sullivan, IN
Aircraft
Grumman G-164A
Tail Number
N952X
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI89DEX06
THE PILOT REPORTED THAT THE AIRPLANE FELT 'MUSHY' DURING THE TAKEOFF INITIAL CLIMB. THE NOSE WAS LOWERED AND FULL THROTTLE APPLIED. THE PILOT THEN ELECTED TO ABORT THE TAKEOFF DURING WHICH CONTROL WAS LOST AND THE AIRPLANE NOSED OVER. INSPECTION OF THE AIRPLANE REVEALED A LEAKING OIL SEAL ON THE TURBOCHARGER WHICH RESULTED IN THE INTAKE MANIFOLD AND SPARK PLUGS BECOMING OIL SOAKED.
NTSB Probable Cause
A FAILURE OF THE SUPERCHARGER OIL SEAL WHICH RESULTED IN A PARTIAL LOSS OF ENGINE POWER DURING TAKEOFF AND THE UNCONTROLLED TOUCHDOWN DURING THE FORCED LANDING. FACTORS RELATED TO THE ACCIDENT WERE: PARTIAL FAILURE OF THE SUPERCHARGER AND SPARK PLUB FOWLING.
Full Narrative
THE PILOT REPORTED THAT THE AIRPLANE FELT 'MUSHY' DURING THE TAKEOFF INITIAL CLIMB. THE NOSE WAS LOWERED AND FULL THROTTLE APPLIED. THE PILOT THEN ELECTED TO ABORT THE TAKEOFF DURING WHICH CONTROL WAS LOST AND THE AIRPLANE NOSED OVER. INSPECTION OF THE AIRPLANE REVEALED A LEAKING OIL SEAL ON THE TURBOCHARGER WHICH RESULTED IN THE INTAKE MANIFOLD AND SPARK PLUGS BECOMING OIL SOAKED.
Flight
Event TypeAccident
Event Time09:45 CDT
Nearest AirportSULLIVAN (0nm N)
Runway36
Runway Length3650 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman G-164A
Tail NumberN952X
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-985-14B · Reciprocating · 450
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 21 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO