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NTSB Report
June 12, 1985 · Cessna T337G · N30S
Knoxville, TN
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 12, 1985
Injury Outcomes
No injuries (4 uninjured)
Location
Knoxville, TN
Aircraft
Cessna T337G
Tail Number
N30S
Operator
Tarr Chevrolet
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL85LA184
THE ACFT MADE AN EMERGENCY GEAR UP LANDING WHEN BOTH THE NORMAL AND EMERGENCY EXTENSION SYSTEMS FAILED TO FUNCTION PROPERLY. A MECHANIC WAS LATER ABLE TO EXTEND THE GEAR WITH THE ACFT ON JACKS BY REPEATEDLY CYCLING THE SELECTOR SWITCH.IT WAS DETERMINED THAT THE SOLENOID ON THE LANDING GEAR HYDRAULIC MANIFOLD ASSEMBLY HAD MALFUNCTIONED, LEAVING THE SELECTOR VALVE ASSEMBLY STUCK IN THE UP POSITION. CESSNA SERVICE LETTER SE76-24 RECOMMENDS REPLACEMENT OF THE SOLENOID WITH AN IMPROVED VERSION. ACCORDING TO THE MECHANIC, THIS HAD NOT BEEN ACCOMPLISHED PRIOR TO THE ACCIDENT.
Full Narrative
THE ACFT MADE AN EMERGENCY GEAR UP LANDING WHEN BOTH THE NORMAL AND EMERGENCY EXTENSION SYSTEMS FAILED TO FUNCTION PROPERLY. A MECHANIC WAS LATER ABLE TO EXTEND THE GEAR WITH THE ACFT ON JACKS BY REPEATEDLY CYCLING THE SELECTOR SWITCH.IT WAS DETERMINED THAT THE SOLENOID ON THE LANDING GEAR HYDRAULIC MANIFOLD ASSEMBLY HAD MALFUNCTIONED, LEAVING THE SELECTOR VALVE ASSEMBLY STUCK IN THE UP POSITION. CESSNA SERVICE LETTER SE76-24 RECOMMENDS REPLACEMENT OF THE SOLENOID WITH AN IMPROVED VERSION. ACCORDING TO THE MECHANIC, THIS HAD NOT BEEN ACCOMPLISHED PRIOR TO THE ACCIDENT.
Flight
Event TypeAccident
Event Time15:50 CDT
Nearest AirportMcghee Tyson (0nm N)
Runway23L
Runway Length5999 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna T337G
Tail NumberN30S
Aircraft CategoryAir
DamageSubstantial
OperatorTarr Chevrolet
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsContinental · IO-360-C · Reciprocating · 225
Seats4
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 65 · Unknown
Conditions
ConditionsVMC
LightDaylight
Wind250° @ 11 kt
Visibility15 sm
CeilingBroken clouds 3500 ft
Temperature / Dew Point68 F / 52
Altimeter29.00 inHg
Observation Time20:50
Weather SourceWFAC