Aircraft Incident/Accident Report
East Troy Municipal Airport

East Troy, Wisconsin 53120
Sunday, July 21, 1996 10:11 CDT

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NTSB Narrative Summary Released at Completion of Accident
The pilot reported that he flew a 'normal' approach to land on runway 8. During the landing roll, the airplane began to 'drift' to the right. The pilot 'applied the brakes gently' and the airplane nosed over. Examination of the airplane revealed the left rudder horn was fractured. No other evidence of mechanical malfunction was reported. Metallurgical examintion of the rudder horn 'showed no evidence of progressive cracking, such as fatigue. The fracture was typical of an overstress separation. There was thinning of the wall and corrosion pits on the inside surface of the tube... .' Measurements of some of the corrosion pits revealed that the thickness of the .035 inch wall tubing was corroded to a thickness of .008 inches in some areas. 'There was no indication that any of the corrosion pits had penetrated through the tube to the outside surface.'
NTSB Probable Cause Narrative
corrosion and fracture of the rudder control horn.
Event Information
Type of EventAccident 
Event Date7/21/1996 
Event Day of the WeekSunday 
Time of Event1011 
Event Time ZoneCentral Daylight Time 
Event CityEAST TROY  
Event StateWISCONSIN 
Event Country-- 
Zipcode of the event site53120  
Event Date Year1996 
Event Date Month
MidAir Collision IndicatorNo 
On Ground Collision occurred ?No 
Event Location Latitude  
Event Location Longitude  
Event Location AirportEAST TROY MUNICIPAL  
Event Location Nearest Airport ID57C  
Indicates whether the acc/inc occurred off or on an airportOn Airport 
Distance from airport in statute miles-- 
Degrees magnetic from airport-- 
Airport Elevation860 
Weather Briefing CompletenessUnknown 
Investigator's weather sourceWeather Observation Facility 
Time of the weather observation1156 Central Daylight Time 
Direction of event from weather observation facility (degrees)60 
Weather Observation Facility IDMKE  
Elevation of weather observation facility723 
Distance of event from weather observation facility (units?)22 
Time Zone of the weather observationCDT 
Lighting ConditionsDay 
Lowest Ceiling Height
Lowest Non-Ceiling Height
Sky/Lowest/Cloud ConditionsClear 
Sky Condition for Lowest CeilingNone 
Visibility Runway Visual Range (Feet)
Visibility Runway Visual Value (Statute Miles)
Visibility (Statute Miles) 10 
Air Temperature at event time (in degrees celsius)-7 
Dew Point at event time (in degress fahrenheit)-10 
Wind Direction (degrees magnetic)140 
Variable Wind IndicatorUnknown 
Wind Speed (knots)
Wind Velocity Indicator Unknown 
Wind Gust IndicatorNot Gusting 
Wind Gust (knots)
Altimeter Setting at event time (in. Hg) 30 
Density Altitude (feet)-- 
Intensity of PrecipitationUnknown 
METAR weather report -- 
Event Highest InjuryNone 
On Ground, Fatal Injuries
On Ground, Minor Injuries
On Ground, Serious Injuries
Injury Total Fatal-- 
Injury Total Minor-- 
Injury Total None
Injury Total Serious-- 
Injury Total All-- 
Investigating AgencyNTSB 
NTSB Docket Number (internal use)1630 
NTSB Notification Source-- 
NTSB Notification DateJul 22 1996 12:00AM 
NTSB Notification Time935 
Fiche Number and/or location -used to find docket informationIMAGE 
Date of most recent change to recordDec 8 2000 10:11AM 
User who most recently changed recorddbo  
Basic weather conditionsVisual Meteorological Cond 
FAA District Office-- 
Aircraft Involved
Aircraft #1
Aircraft Registration NumberN58712 
NTSB NumberCHI96LA252  
Missing Aircraft Indicator
Federal Aviation Reg. PartPart 91: General Aviation 
Type of Flight Plan filedNone 
Flight plan Was Activated?-- 
DamageSubstantial 
Aircraft FireNone 
Aircraft ExplosionNone 
Aircraft Manufacturer's Full NameBoeing  
Aircraft ModelA75N1  
Aircraft Series IdentifierA75N1  
Aircraft Serial Number75-341  
Certified Max Gross Weight2950 
Aircraft CategoryAirplane 
Aircraft Registration ClassU.S. Registered/U.S. Soil 
Aircraft is a homebuilt?No 
Flight Crew Seats-- 
Cabin Crew Seats-- 
Passenger Seats-- 
Total number of seats on the aircraft
Number of Engines
Fixed gear or retractable gearFixed 
Aircraft, Type of Last InspectionAnnual 
Date of Last InspectionOct 1 1995 12:00AM 
Airframe hours since last inspection13 
Airframe Hours1900 
ELT InstalledYes 
ELT ActivatedNo 
ELT Aided Location of Event SiteUnknown 
ELT Type-- 
Aircraft Owner NameJOHN J. VORNDRAN  
Aircraft Owner Street Address694 HIGHWAY N  
Aircraft Owner CitySTOUGHTON  
Aircraft Owner StateWI 
Aircraft Owner Country  
Aircraft Owner Zipcode53589  
Operator is an individual?-- 
Operator Name  
Operator Same as Owner?Yes 
Operator Is Doing Business As-- 
Operator Address Same as Owner?Yes 
Operator Street Address  
Operator City  
Operator State  
Operator Country  
Operator Zip code  
Operator Code  
Owner has at least one certificateNone 
Other Operator of large aircraft?No 
Certified for Part 133 or 137 OperationUnknown 
Operator Certificate Number-- 
Indicates whether an air carrier operation was scheduled or not-- 
Indicates Domestic or International Flight-- 
Operator carrying Pax/Cargo/Mail-- 
Type of Flying (Per_Bus / Primary)Personal 
Second Pilot on BoardNo 
Departure Point Same as EventNo 
Departure Airport Code  
Departure CitySTAUGHTON  
Departure StateWI 
Departure Country  
Departure Time940 
Departure Time ZoneCDT 
Destination Same as Local Fltcrash at destination city 
Destination Airport Code57C  
Destination City  
Destination State  
Destination Country  
Specific Phase of FlightLanding 
Report sent to ICAO?-- 
Evacuation occurred-- 
Date of most recent change to recordJan 2 2001 10:34AM 
User who most recently changed recorddbo  
Since inspection or accident-- 
Event Location Runway Number and Location8  
Runway Length3900 
Runway Width75 
Sight Seeing flightNo 
Air Medical FlightNo 
Medical Flight--