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NTSB Report
June 26, 1985 · Cessna 150M · N704ZS
Rushville, MO
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 26, 1985
Injury Outcomes
2 injuries (2 minor injuries)
Location
Rushville, MO
Aircraft
Cessna 150M
Tail Number
N704ZS
Operator
Riverbend Aviation
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
MKC85LA141
SHORTLY AFTER THE PLT DEPARTED ON A FLT, THE ENG LOST POWER WHILE THE ACFT WAS CRUISING AT 1800 FT MSL OVER HILLY TERRAIN. THE PLT REPORTED THAT THE ENG SPEED DROPPED TO 800 RPM & HE WAS UNABLE TO CORRECT THE SITUATION. DURING A FORCED LANDING ON SOFT TERRAIN, THE ACFT ENCOUNTERED A DITCH & NOSED OVER. AN EXAM OF THE ACFT REVEALED THAT A SELF LOCKING, NAS679A3, SAFETY NUT HAD SEPARATED & THE RESPECTIVE BOLT HAD BACKED OUT, DISCONNECTING THE THROTTLE LINKAGE. THE NUT HAD 2569 OPERATIONAL HRS IN SERVICE & THE ACFT HAD FLOWN 44 HRS SINCE THE LAST ANNUAL INSPECTION. CESSNA SERVICE LETTER, SE 76-6, DATED 4/16/79, RECOMMENDED THAT THE NAS679A3 NUT BE REPLACED BY AN AN310 CASTELLATED NUT & COTTER PIN. AS OF THE DATE OF THE ACCIDENT, NO AIRWORTHINESS DIRECTIVE HAD BEEN ISSUED TO REQUIRE THE CHANGE.
Full Narrative
SHORTLY AFTER THE PLT DEPARTED ON A FLT, THE ENG LOST POWER WHILE THE ACFT WAS CRUISING AT 1800 FT MSL OVER HILLY TERRAIN. THE PLT REPORTED THAT THE ENG SPEED DROPPED TO 800 RPM & HE WAS UNABLE TO CORRECT THE SITUATION. DURING A FORCED LANDING ON SOFT TERRAIN, THE ACFT ENCOUNTERED A DITCH & NOSED OVER. AN EXAM OF THE ACFT REVEALED THAT A SELF LOCKING, NAS679A3, SAFETY NUT HAD SEPARATED & THE RESPECTIVE BOLT HAD BACKED OUT, DISCONNECTING THE THROTTLE LINKAGE. THE NUT HAD 2569 OPERATIONAL HRS IN SERVICE & THE ACFT HAD FLOWN 44 HRS SINCE THE LAST ANNUAL INSPECTION. CESSNA SERVICE LETTER, SE 76-6, DATED 4/16/79, RECOMMENDED THAT THE NAS679A3 NUT BE REPLACED BY AN AN310 CASTELLATED NUT & COTTER PIN. AS OF THE DATE OF THE ACCIDENT, NO AIRWORTHINESS DIRECTIVE HAD BEEN ISSUED TO REQUIRE THE CHANGE.
Flight
Event TypeAccident
Event Time19:10 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150M
Tail NumberN704ZS
Aircraft CategoryAir
DamageSubstantial
OperatorRiverbend Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200-A · Reciprocating · 100
Seats2
People & Injuries
Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 70 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 7 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT