Wittman Airport
Aircraft Accident/Incident Report

Oshkosh, Wisconsin
Friday, February 19, 1982 13:00 CST

NTSB Narrative Summary Released at Completion of Accident

THE RIGHT MAIN GEAR COLLAPSED ON LANDING. INVESTIGATION REVEALED THAT THE REAR TRUNNION PIVOT PIN, P/N5741112-1, HAD MOVED AFT & OUT OF THE TRUNNION. THE PIN HAD ABOUT 1 INCH OF WHITE PAINT ON THE END OF THE PIN THAT EXTENDED INTO THE FLAP TRACK AREA. THE EXTENSION OF THE REAR PIVOT PIN ON THE LEFT GEAR WAS MEASURED AT 1/2 INCH OF PAINTED PIN EXTENDING INTO THE FLAP TRACK AREA. THE PIVOT PIN IS HELD IN THE TRUNNION WITH A ROLL PIN. THE AFT PIN STILL HAD A SECTION OF THE ROLL PIN IN IT & THE FAILURE MODE WAS A SHEAR. THE OTHER TWO SMALL PIECES OF THE ROLL PIN WERE STILL IN THE TRUNNION. THE FORWARD PIVOT PIN SHOWED A WEAR PATTERN THAT THE SHIMS HAD BEEN RIDING ABOUT 2/10 INCH FURTHER FROM THE PIVOT PIN HOLE THAN ON THE REAR PIN. ADDITIONALLY, THE REAR PIN HAD GROOVED WEAR MARKS ALL THE WAY TO THE END OF THE PIVOT PIN FROM THE POINT OF ORIGINAL WEAR PATTERN.

NTSB Probable Cause Narrative

Not Yet Reported

Event Information

Type of Event Accident
Event Date 2/19/1982
Event Day of the Week Friday
Time of Event 1300
Event Time Zone Central Standard Time
Event City OSHKOSH
Event State WISCONSIN
Event Country --
Zipcode of the event site
Event Date Year 1982
Event Date Month 2
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude --
Event Location Longitude --
Event Location Airport WITTMAN
Event Location Nearest Airport ID OSH
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles 0
Degrees magnetic from airport 0
Airport Elevation 0
Weather Briefing Completeness Full
Investigator's weather source Unknown
Time of the weather observation 1306
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID OSH
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Day
Lowest Ceiling Height 800
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Unknown
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 4
Air Temperature at event time (in degrees celsius) --
Dew Point at event time (in degress fahrenheit) 0
Wind Direction (degrees magnetic) 270
Variable Wind Indicator Unknown
Wind Speed (knots) 10
Wind Velocity Indicator Unknown
Wind Gust Indicator Unknown
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 29
Density Altitude (feet) 0
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 7
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 2662
NTSB Notification Source --
NTSB Notification Date --
NTSB Notification Time 0
Fiche Number and/or location -used to find docket information
Date of most recent change to record Oct 31 2002 4:04PM
User who most recently changed record NTSB\ZUZL
Basic weather conditions Instrument Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N6761H
NTSB Number CHI82FA059
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 135: Air Taxi & Commuter
Type of Flight Plan filed IFR
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name CESSNA
Aircraft Model 404
Aircraft Series Identifier 404
Aircraft Serial Number 404-0670
Certified Max Gross Weight 8400
Aircraft Category Airplane
Aircraft Registration Class Unknown
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 10
Number of Engines 2
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Unknown
Date of Last Inspection --
Airframe hours since last inspection 82
Airframe Hours 282
ELT Installed Yes
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name PRIESTER AVIATION SERVICE
Aircraft Owner Street Address
Aircraft Owner City WHEELING
Aircraft Owner State IL
Aircraft Owner Country
Aircraft Owner Zipcode
Operator is an individual? --
Operator Name PRIESTER AVIATION SERVICE
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address
Operator City WHEELING
Operator State IL
Operator Country
Operator Zip code
Operator Code
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not Non-scheduled
Indicates Domestic or International Flight Domestic
Operator carrying Pax/Cargo/Mail Passenger Only
Type of Flying (Per_Bus / Primary) Unknown
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code ATW
Departure City APPLETON
Departure State WI
Departure Country
Departure Time 1242
Departure Time Zone
Destination Same as Local Flt crash at destination city
Destination Airport Code 3GV
Destination City GRAIN VALLEY
Destination State MO
Destination Country
Specific Phase of Flight Landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Sep 18 2002 4:49PM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 36
Runway Length 6700
Runway Width 150
Sight Seeing flight No
Air Medical Flight No
Medical Flight --