# NTSB investigations: Pratt & Whitney PT6A series, CO 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 CEN26LA127](https://openairdocs.org/ntsb/CEN26LA127.md): Raytheon B36TC · Durango, CO · Accident · No injuries · Class 4 · Limited · Final report · Feb 26, 2026 · N2251Q · Substantial damage > The pilot’s improper landing flare and subsequent loss of directional control while attempting to land during high crosswind conditions. - [NTSB CEN20LA083](https://openairdocs.org/ntsb/CEN20LA083.md): Piaggio P180 · Broomfield, CO · Accident · No injuries · Class 3 · Limited · Final report · Feb 13, 2020 · N677P · Substantial damage > The pilot’s loss of directional control on the snow-covered runway, which resulted in a runway excursion. - [NTSB CEN17LA123](https://openairdocs.org/ntsb/CEN17LA123.md): Beech C 99 · Durango, CO · Accident · No injuries · Limited investigation · Final report · Jan 24, 2017 · N216CS · Substantial damage > The pilot's inability to maintain directional control during takeoff in crosswind conditions on a contaminated runway, which resulted in a runway excursion. - [NTSB GAA15CA194](https://openairdocs.org/ntsb/GAA15CA194.md): Air Tractor AT 402B · Monte Vista, CO · Accident · No injuries · Data collection · Final report · Jul 22, 2015 · N402KN · Substantial damage > The pilot's failure to maintain directional control during the landing, which resulted in a runway excursion and collision with objects. - [NTSB ENG14IA018](https://openairdocs.org/ntsb/ENG14IA018.md): Piper PA46 500TP · Denver, CO · Incident · No injuries · Incident investigation · Final report · Jul 7, 2014 · N406CD · Minor damage > The pilots' incorrect activation of the Manual Override Lever, during ground operation, in an attempt to correct a sub-idle speed condition of the engine, resulting in an over-temperature of the CT blades, their subsequent distress and failure of the engine.… - [NTSB CEN14FA167](https://openairdocs.org/ntsb/CEN14FA167.md): Socata TBM 700 · Ridgway, CO · Accident · 5 fatal · Field investigation · Final report · Mar 22, 2014 · N702H · Substantial damage > The pilot's loss of airplane control during an instrument approach procedure, which resulted in the airplane exceeding its critical angle of attack and entering an inadvertent aerodynamic stall and spin. - [NTSB DCA13FA148](https://openairdocs.org/ntsb/DCA13FA148.md): Beech 1900D · Telluride, CO · Accident · No injuries · Field investigation · Final report · Sep 1, 2013 · N169GL · Substantial damage > Failure of the left main landing gear actuator internal lock to engage in the locked position for undetermined reasons. - [NTSB ENG12IA013](https://openairdocs.org/ntsb/ENG12IA013.md): Beech 1900D · Denver International Airport, CO · Incident · No injuries · Incident investigation · Final report · Dec 3, 2011 · N247GL · Minor damage > A failure of the nose landing gear end cap due to fatigue. Contributing to the failure were the ineffective inspection and the unknown effect of grain direction on fatigue life. - [NTSB CEN11LA323](https://openairdocs.org/ntsb/CEN11LA323.md): Air Tractor AT-402A · Arriba, CO · Accident · Serious injuries · Limited investigation · Final report · May 5, 2011 · N5192F · Substantial damage > The pilot’s controlled flight into terrain for undetermined reasons. - [NTSB CEN10LA315](https://openairdocs.org/ntsb/CEN10LA315.md): Beech 1900D · Denver, CO · Accident · No injuries · Limited investigation · Final report · Jun 12, 2010 · N195GL · Substantial damage > The pre-existent damage of the right-hand landing gear actuator attachment lug which led to fatigue cracking and eventual overload failure resulting in a collapsed gear upon landing. - [NTSB CEN09FA126](https://openairdocs.org/ntsb/CEN09FA126.md): Pilatus PC-12/45 · Hayden, CO · Accident · 2 fatal · Field investigation · Final report · Jan 11, 2009 · N604WP · Destroyed > The pilot's loss of control due to snow/ice contamination on the airplane's lifting surfaces as a result of his decision not to deice the airplane before departure. - [NTSB DEN08FA003](https://openairdocs.org/ntsb/DEN08FA003.md): Raytheon C90A · Pagosa Springs, CO · Accident · 3 fatal · Field investigation · Final report · Oct 5, 2007 · N590GM · Destroyed > The pilot's failure to maintain clearance from mountainous terrain. Contributing to the accident was the pilot's inadequate preflight planning, improper in-flight planning and decision making, the dark night, and the controller's failure to issue a safety… - [NTSB DEN07LA030](https://openairdocs.org/ntsb/DEN07LA030.md): Piper PA-46-500TP · Steamboat Springs, CO · Accident · No injuries · Limited investigation · Final report · Nov 30, 2006 · N804JH · Substantial damage > The inadequate design of the engine mount, which caused an uncommanded left turn, loss of directional control, and impact with snow-covered terrain. Contributing to the accident was the low nose gear tire pressure. - [NTSB DEN06IA019](https://openairdocs.org/ntsb/DEN06IA019.md): Beech 1900D · Telluride, CO · Incident · No injuries · Incident investigation · Final report · Nov 23, 2005 · N253GL · Minor damage > The tug driver's failure to maintain adequate clearance from the airplane resulting in the baggage cart striking the airplane's stabilon. A factor contributing to the incident was the tug driver's failure to consider the extra height of the cart in relation… - [NTSB DEN05LA109](https://openairdocs.org/ntsb/DEN05LA109.md): Piper PA46-500TP · Canon City, CO · Accident · No injuries · Limited investigation · Final report · Jul 1, 2005 · N804JH · Substantial damage > the pilot's failure to maintain directional control during the landing roll. Contributing factors include the crosswind and windshear conditions. - [NTSB DEN05IA092](https://openairdocs.org/ntsb/DEN05IA092.md): Beech 1900D · Grand Junction, CO · Incident · No injuries · Incident investigation · Final report · Jun 26, 2005 · N240GL · Minor damage > the flight crew's diverted attention while the number 2 engine was operating and failure to maintain aircraft control which resulted in an inadvertent taxi of the airplane into an airport security fence. - [NTSB DEN05IA046](https://openairdocs.org/ntsb/DEN05IA046.md): Beech 1900D · Denver, CO · Incident · Minor injuries · Incident investigation · Final report · Jan 4, 2005 · N202UX · Minor damage > the tug driver's failure to maintain operational control of the tug, resulting in impact with an airplane. Contributing factors include the tug driver's improper procedure, the tug driver's inadequate initial ground equipment training, and the… - [NTSB DEN04IA024](https://openairdocs.org/ntsb/DEN04IA024.md): Beech 1900D · Denver, CO · Incident · No injuries · Incident investigation · Final report · Nov 10, 2003 · N254GL · Minor damage > the ground personnel’s failure to maintain aircraft clearance, resulting in the collision. Contributing factors include ground communications not coordinated by the ground personnel, the flight crew's inadequate visual outlook and the parked airplane. - [NTSB DEN03MA035](https://openairdocs.org/ntsb/DEN03MA035.md): Piper PA-31T · Denver, CO · Accident · 5 fatal · Major investigation · Final report · Jan 25, 2003 · N360LL · 2 aircraft · Destroyed > Both pilots' inadequate visual lookout. A contributing factor was the Cheyenne pilot operating the airplane with a known transponder deficiency. - [NTSB DEN02TA092](https://openairdocs.org/ntsb/DEN02TA092.md): Air Tractor AT-802A · Broomfield, CO · Accident · Minor injuries · Final report · Aug 14, 2002 · N91092 · Substantial damage > the airplane's left main landing gear tire separated from its wheel during takeoff roll for an undetermined reason. Contributing factors were the pilot's inability to maintain aircraft control during takeoff roll and the subsequent impact with the Visual… - [NTSB DEN01FA094](https://openairdocs.org/ntsb/DEN01FA094.md): Cessna 208B · Steamboat Spngs, CO · Accident · 1 fatal · Field investigation · Final report · May 5, 2001 · N948FE · Destroyed > an inadvertent stall during an instrument approach, which resulted in a loss of control. Contributing factors were the pilot's attention being diverted by an abnormal indication, conditions conducive to airframe icing, and the pilot's lack of total experience… - [NTSB DEN01FA075](https://openairdocs.org/ntsb/DEN01FA075.md): Socata TBM 700 · Englewood, CO · Accident · 1 fatal · Field investigation · Final report · Mar 26, 2001 · N300WC · Destroyed > the pilot's spatial disorientation, which led to his failure to maintain aircraft control. A contributing factor was the pilot's decision to intentionally fly into known adverse weather that consisted of low ceilings, obscuration, and ice fog. - [NTSB DEN99LA149](https://openairdocs.org/ntsb/DEN99LA149.md): Air Tractor AT-402A · Mead, CO · Accident · No injuries · Limited investigation · Final report · Aug 11, 1999 · N402RE · Substantial damage > The pilot's failure to follow proper approach to landing procedures as outlined in the Airplane Flight Manual. A factor was the 6-foot tall corn stalks. - [NTSB DCA98MA002](https://openairdocs.org/ntsb/DCA98MA002.md): Cessna 208B · Montrose, CO · Accident · 9 fatal · Major investigation · Final report · Oct 8, 1997 · N12022 · Destroyed > the pilot's failure to maintain sufficient airspeed for undetermined reasons while maneuvering the airplane near the maximum gross weight and aft cg in or near instrument meteorological conditions, resulting in the loss of control and entry into a stall/spin.… - [NTSB FTW97LA088](https://openairdocs.org/ntsb/FTW97LA088.md): Beech B90 · Longmont, CO · Accident · Minor injuries · Limited investigation · Final report · Jan 24, 1997 · N76GM · Destroyed > Failure of the pilot to refuel the airplane, resulting in fuel exhaustion. Factors were the pilot's reference to similar but different aircraft performance charts, and the operator's failure to provide the pilot with the proper performance charts. - [NTSB DEN93FA009](https://openairdocs.org/ntsb/DEN93FA009.md): Piper PA-42 · Grand Junction, CO · Accident · 3 fatal · Field investigation · Final report · Oct 31, 1992 · N250TJ · Destroyed > Improper IFR procedure and resultant disorientation which resulted in a collision with terrain. - [NTSB DEN88IA207](https://openairdocs.org/ntsb/DEN88IA207.md): Beech 1900 · Denver, CO · Incident · No injuries · Incident investigation · Final report · Sep 17, 1988 · N32017 · Minor damage - [NTSB DEN85LA244](https://openairdocs.org/ntsb/DEN85LA244.md): Cessna 425 · Boulder, CO · Accident · No injuries · Limited investigation · Final report · Sep 19, 1985 · N1222B · Substantial damage > The plt said he made a normal ldg. During ldg roll the left brake would not respond to pedal application. The plt errored by incorrectly feathering both props. The a/c went off the eng of r/w and struck a fence. Examination of the brake system revealed a… ## 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" = 'CO' 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 ('52032', '52034')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=52032&state=CO --- 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.