Accident Cessna 404 N6761H, Friday 19 February 1982
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Date:Friday 19 February 1982
Time:14:00 LT
Type:Silhouette image of generic C404 model; specific model in this crash may look slightly different    
Cessna 404
Owner/operator:Priester Aviation Service
Registration: N6761H
MSN:
Total airframe hrs:3047 hours
Engine model:Continental O-300-C
Fatalities:Fatalities: 0 / Occupants: 0
Other fatalities:0
Aircraft damage: Unknown
Category:Accident
Location:Oshkosh, WI -   United States of America
Phase:
Nature:Unknown
Departure airport:
Destination airport:
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
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.

Probable Cause:

Accident investigation:
cover
  
Investigating agency: NTSB
Report number: CHI82FA059
Status: Investigation completed
Duration: 1 year
Download report: Final report

Sources:

NTSB CHI82FA059

Revision history:

Date/timeContributorUpdates
03-Apr-2024 17:36 ASN Update Bot Added

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