# NTSB investigations: Air Tractor AT-301: Airframe/component/system failure/malfunction 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 CHI07LA173](https://openairdocs.org/ntsb/CHI07LA173.md): Air Tractor AT-301 · Fergus Falls, MN · Accident · Minor injuries · Limited investigation · Final report · Jun 20, 2007 · N23667 · Substantial damage > The propeller blade failure during climb due to a fatigue crack. The oil leak that obstructed the pilot's vision was a factor in the accident. - [NTSB LAX02LA257](https://openairdocs.org/ntsb/LAX02LA257.md): Air Tractor AT-301 · Dos Palos, CA · Accident · No injuries · Limited investigation · Final report · Aug 22, 2002 · N8793S · Substantial damage > the failure of the propeller blade due to fatigue. Factors in the accident were the inadequate maintenance-repair of the blade, and, inadequate pilot preflight inspections. - [NTSB CHI01LA252](https://openairdocs.org/ntsb/CHI01LA252.md): Air Tractor AT-301 · Edmore, ND · Accident · Minor injuries · Limited investigation · Final report · Jul 28, 2001 · N4361S · Substantial damage > The incorrect installation of the wheel assembly bolts by maintenance personnel resulting in the stripped bolt threads and ultimate failure of the wheel, and directional control not possible by the pilot. A factor was the ditch - [NTSB FTW00LA012](https://openairdocs.org/ntsb/FTW00LA012.md): Air Tractor AT-301 · Olton, TX · Accident · Minor injuries · Limited investigation · Final report · Oct 14, 1999 · N23930 · Substantial damage > The inflight separation of the propeller blade due to damage from a wire strike. A factor was the lack of suitable terrain for the forced landing. - [NTSB FTW99LA204](https://openairdocs.org/ntsb/FTW99LA204.md): Air Tractor AT-301 · Victoria, TX · Accident · No injuries · Limited investigation · Final report · Jul 26, 1999 · N4393S · Substantial damage > The separation of the engine cowling due to a fractured support bracket, which resulted in the cowling striking and bending four engine push rods causing a loss of engine power. A factor was the lack of suitable terrain for the forced landing. - [NTSB FTW99LA107](https://openairdocs.org/ntsb/FTW99LA107.md): Air Tractor AT-301 · Garwood, TX · Accident · No injuries · Limited investigation · Final report · Mar 31, 1999 · N8789S · Substantial damage > The pilot's inability to maintain directional control of the airplane as result of the failure of the right brake system due to the stripped threads on the eye bolt connecting the brake pedal to the brake master cylinder. - [NTSB CHI96LA217](https://openairdocs.org/ntsb/CHI96LA217.md): Air Tractor AT-301 · Ness City, KS · Accident · No injuries · Limited investigation · Final report · Jun 26, 1996 · N8883S · Substantial damage > the failure of a counterweight bolt in the propeller for reasons undetermined. Factors were the wet landing area and the encounter with unsuitable terrain during the forced landing. - [NTSB DEN93LA084](https://openairdocs.org/ntsb/DEN93LA084.md): Air Tractor AT-301 · Garner, AR · Accident · No injuries · Limited investigation · Final report · Jul 22, 1993 · N3650U · Substantial damage > Total failure of one propeller blade. Factors were the continued operation of the engine during the forced landing, despite the pilot's efforts to shut it down, and the lack of suitable terrain for the forced landing. - [NTSB MIA92LA179](https://openairdocs.org/ntsb/MIA92LA179.md): Air Tractor AT-301 · Satartia, MS · Accident · No injuries · Limited investigation · Final report · Sep 10, 1992 · N4333S · Substantial damage > Failure of the brake system due to installation of a bogus part by an unknown person. Directional control by the pilot in command was not possible. - [NTSB MIA91LA144](https://openairdocs.org/ntsb/MIA91LA144.md): Air Tractor AT-301 · Tutwiler, MS · Accident · Minor injuries · Limited investigation · Final report · May 13, 1991 · N8563S · Substantial damage > Fatigue failure of one of the propeller blades resulting in the forced landing. Contributing to the accident was lack of suitable terrain. - [NTSB MIA90LA083](https://openairdocs.org/ntsb/MIA90LA083.md): Air Tractor AT-301 · Rolling Fork, MS · Accident · No injuries · Limited investigation · Final report · Mar 6, 1990 · N23509 · Substantial damage > The in-flight separation of the left aileron due to improper maintenance procedures and an inadequate aircraft preflight. - [NTSB MKC87DPG03](https://openairdocs.org/ntsb/MKC87DPG03.md): Air Tractor AT-301 · Tillar, AR · Accident · Serious injuries · Final report · Aug 27, 1987 · N3159X · Substantial damage > The pilot stated that the prop RPM became erratic. On approach, the prop ran completely out of control, causing the aircraft to nose down into a plowed field just short of the landing area. The a/c hit on the main landing gear, broke them off, then it nosed… - [NTSB MIA87LA209](https://openairdocs.org/ntsb/MIA87LA209.md): Air Tractor AT-301 · Swiftown, MS · Accident · Minor injuries · Limited investigation · Final report · Jul 18, 1987 · N7310N · Substantial damage > While spraying cotton, severe vibration was felt throughout the acft & the plt elected a forced ldg. During the flare, the throttle was advanced to raise the nose, & the plt discovered the eng had totally failed. The acft flipped inverted on touch down. An… - [NTSB MKC87LA137](https://openairdocs.org/ntsb/MKC87LA137.md): Air Tractor AT301A · Baderville, MO · Accident · No injuries · Limited investigation · Final report · Jul 12, 1987 · N3169N · Destroyed > During an aerial application operation, the pilot experienced a violent engine vibration. He reduced power and attempted an emergency ldg. Acft nosed over on landing. The pilot exited aircraft through side window. Acft caught fire and was destroyed.… - [NTSB FTW86FRG20](https://openairdocs.org/ntsb/FTW86FRG20.md): Air Tractor AT301 · Taylor, TX · Accident · No injuries · Final report · May 21, 1986 · N3168H · Substantial damage > Commercial pilot of an Air Tractor AT301 enroute to base of operations at Taylor, TX executed a forced landing after experiencing severe vibration in the aircraft. Landing was made to a soft field. The aircraft nosed over during landing roll and was… - [NTSB SEA86LA081](https://openairdocs.org/ntsb/SEA86LA081.md): Air Tractor 301 · Prescott, WA · Accident · No injuries · Limited investigation · Final report · Mar 21, 1986 · N5097S · Substantial damage > The brake locking system engaged in flight causing the right brake to lock. The aircraft nosed over on landing where a small fire erupted from fuel spillage onto the hot engine. - [NTSB FTW85LA039](https://openairdocs.org/ntsb/FTW85LA039.md): Air Tractor AT-301 · Mission, TX · Accident · No injuries · Limited investigation · Final report · Nov 8, 1984 · N8523S · Substantial damage > After a loss of oil pressure the acft was landed downwind. During the precautionary landing across plowed furrows, the rt wing caught in the sugar cane crop and the acft turned to the rt, collapsing the left landing gear and damaging the left wing. The plts… - [NTSB ATL83FKQ03](https://openairdocs.org/ntsb/ATL83FKQ03.md): Air Tractor AT-301 · Redwood, MS · Accident · No injuries · Final report · Aug 25, 1983 · N8511S · Substantial damage > The acft made a forced landing in a soybean field after severe vibration developed during a spraying operation. The pilot stated that the powerplant and flt controls were functioning normally at the time of the accident. An on-scene investigation revealed… ## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('0390103', '0390105') AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 130)) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?model=0390103&occurrence=130 --- 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.