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NTSB Report
June 27, 1983 · Cessna T188C · N9639J
Marshall, MO
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 27, 1983
Injury Outcomes
1 injury (1 minor injury)
Location
Marshall, MO
Aircraft
Cessna T188C
Tail Number
N9639J
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
MKC83LA137
THE ENG FAILED WHILE ENROUTE TO SPRAY. THE ACFT WAS OBSERVED TO JETTISON ITS LOAD PRIOR TO IMPACTING TREES IN A WOODED PASTURE. METALLURGICAL EXAMINATION REVEALED THAT THE CRANKSHAFT, P/N631716, HAD FRACTURED FROM FATIGUE PROGRESSION THROUGH THE FORWARD CHEEK OF THE #3 MAIN BEARING JOURNAL. INITIATION HAD OCCURRED 0.047 INCHES BELOW THE FORWARD RADIUS SURFACE. NO METALLURGICAL ABNORMALITIES WERE FOUND AT THE ORIGIN SITE.
Full Narrative
THE ENG FAILED WHILE ENROUTE TO SPRAY. THE ACFT WAS OBSERVED TO JETTISON ITS LOAD PRIOR TO IMPACTING TREES IN A WOODED PASTURE. METALLURGICAL EXAMINATION REVEALED THAT THE CRANKSHAFT, P/N631716, HAD FRACTURED FROM FATIGUE PROGRESSION THROUGH THE FORWARD CHEEK OF THE #3 MAIN BEARING JOURNAL. INITIATION HAD OCCURRED 0.047 INCHES BELOW THE FORWARD RADIUS SURFACE. NO METALLURGICAL ABNORMALITIES WERE FOUND AT THE ORIGIN SITE.
Flight
Event TypeAccident
Event Time18:45 CDT
Nearest Airport11nm S
Runway0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftCessna T188C
Tail NumberN9639J
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-T · Reciprocating · 310
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 45 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind200° @ 8 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point66 F
Altimeter29.00 inHg
Observation Time23:46
Weather SourceWFAC