CHI91LA076
1991-01-24 · MIDDLETON, Wisconsin, United States · None · 1 aircraft · Status: Completed
Airport C29
Aircraft involved
Probable cause & findings
THE MAIN LANDING GEAR COLLAPSED DURING LANDING ROLLOUT DUE TO EXTREME COLD TEMPERATURES. A FACTOR RELATED TO THE ACCIDENT WAS A SNOWBANK ADJACENT TO THE RUNWAY.
Factual narrative
THE PILOT SAID THAT AFTER TAKEOFF HE FAILED TO GET A GEAR UP AND LOCKED INDICATION. AFTER UNSUCCESSFUL ATTEMPTS TO LOWER THE GEAR, HE ELECTED TO RETURN FOR LANDING. A FLY-BY WAS EXECUTED FOR VERIFICATION OF A GEAR DOWN EXTENSION. DURING THE LANDING ROLL, THE RIGHT MAIN GEAR COLLAPSED FOLLOWED BY THE LEFT. THE NOSE GEAR REMAINED EXTENDED. THE AIRCRAFT VEERED OFF THE RUNWAY INTO A SNOW BANK AND SUSTAINED SUBSTANTIAL DAMAGE. POST ACCIDENT INVESTIGATION FAILED TO REVEAL A MECHANICAL CAUSE OF THE GEAR MALFUNCTION. THE OUTSIDE AIR TEMPERATURE WAS ABOUT ZERO F. AND HAD BEEN AS LOW AS 10 DEGREES BELOW PRIOR TO THE ACCIDENT, WHICH COULD CONTRIBUTE TO GEAR RETRACTION MALFUNCTION. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1991_CHI91LA076.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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