# NTSB investigations: Lycoming VO-435 series, IL 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 CEN16CA321](https://openairdocs.org/ntsb/CEN16CA321.md): Continental Copters Tomcat MK6B · Sparland, IL · Accident · Serious injuries · Data collection · Final report · Aug 7, 2016 · N17H · Substantial damage > The pilot's improper fuel management, which resulted in fuel exhaustion, a total loss of engine power, and a forced landing. - [NTSB CEN16LA284](https://openairdocs.org/ntsb/CEN16LA284.md): Texas Helicopter OH 13H/M74A · Minonk, IL · Accident · No injuries · Limited investigation · Final report · Jul 25, 2016 · N10009 · Substantial damage > Failure of the truck driver to ensure that he had adequate clearance to pass under the helicopter and the failure of the loader to park in a safer area for reloading operations. - [NTSB CEN13LA442](https://openairdocs.org/ntsb/CEN13LA442.md): Texas Helicopter OH-13H/M74A · Streator, IL · Accident · No injuries · Limited investigation · Final report · Jul 29, 2013 · N10009 · Substantial damage > The pilot's diverted attention during an agricultural application maneuver, which resulted in the helicopter impacting a corn field. - [NTSB CEN11CA524](https://openairdocs.org/ntsb/CEN11CA524.md): Texas Helicopter OH-13H/M74A · Creston, IL · Accident · Minor injuries · Data collection · Final report · Jul 28, 2011 · N10009 · Substantial damage > The pilot's failure to maintain adequate skid clearance from the helicopter cart during landing, resulting in a dynamic rollover. - [NTSB CEN10CA411](https://openairdocs.org/ntsb/CEN10CA411.md): Continental Copters Tomcat MK6B · Blackstone, IL · Accident · Minor injuries · Data collection · Final report · Jul 15, 2010 · N17H · Substantial damage > The helicopter encountered a dust devil at a low altitude during the aerial application flight. - [NTSB CHI95LA003](https://openairdocs.org/ntsb/CHI95LA003.md): Bell 47G2 · Decatur, IL · Accident · Minor injuries · Limited investigation · Final report · Oct 3, 1994 · N5193B · Substantial damage > the failure of the roller springs in the freewheeling unit of the transmission which caused the unit to disengage. - [NTSB CHI93LA320](https://openairdocs.org/ntsb/CHI93LA320.md): Bell 47-G5 · Schaumburg, IL · Accident · Minor injuries · Limited investigation · Final report · Aug 12, 1993 · N1347X · Substantial damage > the pilot's improper autorotation techniques. - [NTSB CHI91LA205](https://openairdocs.org/ntsb/CHI91LA205.md): Hiller UH-12D · Savoy, IL · Accident · No injuries · Limited investigation · Final report · Jul 2, 1991 · N94515 · Substantial damage > The pilot's failure to maintain tail rotor clearance from the ground. A related factor is the pilot's lack of total experience in helicopters. - [NTSB CHI87DEV02](https://openairdocs.org/ntsb/CHI87DEV02.md): Bell 47G2 · Peoria Heights, IL · Accident · No injuries · Final report · Jun 22, 1987 · N15395 · Substantial damage > Returning from a powerline patrol flight, the engine surged twice and quit. The pilot executed an autorotation to the only available landing site, a high school football field. On touchdown the blades flexed and severed the tailboom. Investigation revealed… - [NTSB CHI85FEV04](https://openairdocs.org/ntsb/CHI85FEV04.md): Hiller UH-12D · Breese, IL · Accident · No injuries · Final report · Sep 24, 1985 · N67182 · Substantial damage > The plt reported that the eng began losing power while he was en route at an alt of aprx 200 ft AGL. He turned & initiated an autorotation to a road construction site. The helicopter landed tail low. Subsequently, the tail boom was chopped off & the… - [NTSB CHI82DA171](https://openairdocs.org/ntsb/CHI82DA171.md): Bell 47G-5 · Sublette, IL · Accident · Minor injuries · Final report · May 17, 1982 · N7841S · Substantial damage > Prior to this flight, the helicopter had been flown about 1 hr from roselle to Sublette, IL, then it was flown another 1/2 hr to survey the area to be sprayed. About 10 minutes after departing to spray, the engine lost power. The pilot started an autorotative… - [NTSB CHI81FEV21](https://openairdocs.org/ntsb/CHI81FEV21.md): Texas Hel OH-13H · Danville, IL · Accident · 1 fatal · Closed · Jun 16, 1981 · N10002 · Destroyed - [NTSB CHI76FCA03](https://openairdocs.org/ntsb/CHI76FCA03.md): Bell 47G2 · Sauget, IL · Accident · No injuries · Closed · Oct 18, 1975 · N88755 · Substantial damage - [NTSB NYC75FEV23](https://openairdocs.org/ntsb/NYC75FEV23.md): Bell 47G-2 · Eddyville, IL · Accident · No injuries · Closed · Mar 17, 1975 · N972B · Substantial damage - [NTSB CHI75FEE14](https://openairdocs.org/ntsb/CHI75FEE14.md): Bell 47G5A · Hinsdale, IL · Accident · Minor injuries · Closed · Aug 20, 1974 · N211CB · Substantial damage - [NTSB CHI73DEV05](https://openairdocs.org/ntsb/CHI73DEV05.md): Bell 47G-2 · Murdock, IL · Accident · No injuries · Closed · Jul 23, 1972 · N12848 · Substantial damage ## 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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41525&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.