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NTSB Report
October 20, 1991 · North American Navion D · N10JF
Lake Geneva, WI
Overview
Report Status
Probable Cause
Event Type
Accident
Date
October 20, 1991
Injury Outcomes
No injuries (4 uninjured)
Location
Lake Geneva, WI
Aircraft
North American Navion D
Tail Number
N10JF
Operator
Rempert Roger L
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI92LA015
THE PILOT CLIMBED TO CRUISE ALTITUDE AND HAD SET POWER BEFORE THE ENGINE VIBRATED BRIEFLY AND QUIT. THE PILOT EXECUTED A FORCED LANDING IN A ROUGH FIELD. ENGINE TEARDOWN REVEALED A BROKEN CRANKSHAFT. THE FRACTURE SURFACE SHOWED FATIGUE EMANATING FROM A SCRATCH IN A FILLET AT THE NUMBER 2 MAIN BEARING JOURNAL.
NTSB Probable Cause
FATIGUE FAILURE OF THE CRANKSHAFT. A FACTOR IN THE ACCIDENT WAS INADEQUATE QUALITY CONTROL BY OTHER MAINTENANCE PERSONNEL.
Full Narrative
THE PILOT CLIMBED TO CRUISE ALTITUDE AND HAD SET POWER BEFORE THE ENGINE VIBRATED BRIEFLY AND QUIT. THE PILOT EXECUTED A FORCED LANDING IN A ROUGH FIELD. ENGINE TEARDOWN REVEALED A BROKEN CRANKSHAFT. THE FRACTURE SURFACE SHOWED FATIGUE EMANATING FROM A SCRATCH IN A FILLET AT THE NUMBER 2 MAIN BEARING JOURNAL.
Flight
Event TypeAccident
Event Time16:00 CDT
Nearest AirportAmericana (1nm NE)
Runway23
Runway Length4100 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftNorth American Navion D
Tail NumberN10JF
Aircraft CategoryAir
DamageSubstantial
OperatorRempert Roger L
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · I0-520B · Reciprocating · 285
Seats4
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 49 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind230° @ 14 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter30.00 inHg
Observation Time20:45
Weather SourceWFAC