Accident Cessna 401 N777CS, Wednesday 14 March 1984

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Date:	Wednesday 14 March 1984
Time:	23:30 LT
Type:	Cessna 401
Owner/operator:	Midwest Aviation Corp.
Registration:	N777CS
MSN:	4010152
Total airframe hrs:	4855 hours
Engine model:	Continental TSIO-520-E
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Chicago, IL - United States of America
Phase:	Landing
Nature:	Unknown
Departure airport:	Madison, WI (KMSN)
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE ACFTS LEFT MAIN GEAR COLLAPSED DURING THE LANDING ROLL. INVESTIGATION REVEALED THAT THE BOLT ON THE TOP PORTION OF THE LH BELLCRANK ASSEMBLY WAS SHEARED OFF. ONE OF THE TANGS AT THE BOTTOM OF THE BELLCRANK WAS ALSO BROKEN. WHEN EXAMINED UNDER A 10 POWER MICROSCOPE THE FRACTURED REVEALED INSTANTANEOUS OVERLOAD CHARACTERISTICS.

Probable Cause:

Accident investigation: