# NTSB investigations, IL: Main gear collapsed NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB CHI07CA028](https://openairdocs.org/ntsb/CHI07CA028.md): Cessna 421C · Moline, IL · Accident · No injuries · Data collection · Final report · Nov 26, 2006 · N471BW · Substantial damage > The incorrect installation of the torque link scissor assembly by maintenance personnel, which resulted in the collapse of the right main landing gear during landing. - [NTSB CHI05LA136](https://openairdocs.org/ntsb/CHI05LA136.md): Cessna 182TR · Wheeling, IL · Accident · No injuries · Limited investigation · Final report · Jun 7, 2005 · N4978T · Substantial damage > The pilot failed to verify that the landing gear were fully extended and failed to perform the emergency landing gear extention procedures. Factors to the accident included the low hydraulic fluid level, and the weak battery that resulted in a partial… - [NTSB CHI98LA282](https://openairdocs.org/ntsb/CHI98LA282.md): Cessna 310R · Cahokia, IL · Accident · No injuries · Limited investigation · Final report · Jun 27, 1998 · N4249C · Substantial damage > The collapse of the left main landing gear during landing roll for undetermined reasons. - [NTSB CHI89IA084](https://openairdocs.org/ntsb/CHI89IA084.md): Fokker F-27 MK500 · Moline, IL · Incident · No injuries · Incident investigation · Final report · May 4, 1989 · N511AW · Minor damage > Material failure of the landing gear retraction and extension assembly. Inadequate maintenance and troubleshooting procedures in company directives were factors in this incident. - [NTSB CHI89FA058](https://openairdocs.org/ntsb/CHI89FA058.md): Cessna 177RG · Rockford, IL · Accident · No injuries · Field investigation · Final report · Mar 18, 1989 · N52634 · Substantial damage > The inadequate servicing of the hydraulic fluid by maintenance personnel and the pilot's failure to extend the landing gear manually. - [NTSB CHI86LA201](https://openairdocs.org/ntsb/CHI86LA201.md): Piper PA-34-200T · Wheeling, IL · Accident · No injuries · Limited investigation · Final report · Aug 9, 1986 · N6120J · Substantial damage > Plt reported that upon landing, gear was down and locked and after landing right wheel buckled. Investigation revealed break resulted from hard side load. - [NTSB CHI86LA175](https://openairdocs.org/ntsb/CHI86LA175.md): Piper PA-28R-201 · Chicago, IL · Accident · No injuries · Limited investigation · Final report · Jul 14, 1986 · N31588 · Substantial damage > The pilot was unable to get a down and locked indication for the left main gear and upon touchdown the left gear collapsed. Inspection revealed an internal failure of the left main actuator. The fluid had leaked past the o-rings and prevented the gear from… - [NTSB CHI86FA119](https://openairdocs.org/ntsb/CHI86FA119.md): Boeing 737-222 · Chicago, IL · Accident · Minor injuries · Field investigation · Final report · Apr 8, 1986 · N9054U · Substantial damage > The left main landing gear collapsed moments after touchdown. Winds as reported by the twr were from 350 degs at 19 KTS gusting to 29 KTS. The captain and copilot reported the touchdown was normal. The 3 flight attendants said the aircraft landed hard and… - [NTSB CHI84LA130](https://openairdocs.org/ntsb/CHI84LA130.md): Cessna 401 · Chicago, IL · Accident · No injuries · Limited investigation · Final report · Mar 15, 1984 · N777CS · Substantial damage > 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… - [NTSB CHI83IA446](https://openairdocs.org/ntsb/CHI83IA446.md): Cessna 401A · Frankfort, IL · Incident · No injuries · Incident investigation · Final report · Sep 30, 1983 · N6208Q · Minor damage > The right main landing gear collapsed during landing roll-the right main landing gear bellcrank was found to have failed in instantaneous overload. The rigging of main gear was improper. - [NTSB CHI82DA285](https://openairdocs.org/ntsb/CHI82DA285.md): Cessna 310P · Marion, IL · Accident · No injuries · Final report · Jul 30, 1982 · N5746M · Substantial damage > The aircrafts right main landing gear collapsed during landing. The instructor and student were practicing touch and go landings when the accident occurred. Examination of the gear revealed the torque tube assembly (p/n 504-5010-8) was broken at the forward… ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."eventStateOrRegion" = 'IL' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 191) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?occurrence=191&state=IL --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.