# NTSB investigations: Pratt & Whitney PT6A series, CA 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 WPR24LA186](https://openairdocs.org/ntsb/WPR24LA186.md): Grumman/Schweizer G-164D · Richvale, CA · Accident · No injuries · Class 4 · Limited · Final report · Jun 8, 2024 · N6736K · Substantial damage > The pilot’s decision to take off with a tailwind and their failure to maintain clearance from terrain. - [NTSB WPR24LA070](https://openairdocs.org/ntsb/WPR24LA070.md): Air Tractor AT-502A · Stratford, CA · Accident · No injuries · Class 3 · Limited · Final report · Jan 10, 2024 · N6126U · Substantial damage > A partial loss of engine power due to the malfunction of the engine compressor bleed-off valve. - [NTSB WPR23LA333](https://openairdocs.org/ntsb/WPR23LA333.md): Ayres S2R-T34 · Three Rocks, CA · Accident · No injuries · Class 4 · Limited · Final report · Sep 1, 2023 · N61373 · Substantial damage > The airplane’s exceedance of the critical angle of attack, resulting in an aerodynamic stall and impact with terrain. - [NTSB WPR23LA217](https://openairdocs.org/ntsb/WPR23LA217.md): Air Tractor AT-502B · Bakersfield, CA · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 5, 2023 · N6174W · Substantial damage > The pilot’s improper use of flaps during the takeoff sequence which resulted in a runway overrun and collision with trees. - [NTSB WPR22FA197](https://openairdocs.org/ntsb/WPR22FA197.md): Cessna 208B · Oceanside, CA · Accident · 1 fatal · Class 3 · Field · Final report · Jun 3, 2022 · N7581F · Substantial damage > The right-seated pilot’s failure to correct the left-seated pilot’s mismanagement of the engine thrust, which resulted in undesired speed and thrust oscillations during the final approach and a subsequent descent into terrain. - [NTSB WPR21LA368](https://openairdocs.org/ntsb/WPR21LA368.md): Air Tractor AT-602 · Sacramento, CA · Accident · No injuries · Class 4 · Limited · Final report · May 21, 2022 · N8521V · Substantial damage > The pilot's inadequate fuel management, which resulted in a total loss of engine power due to fuel starvation. - [NTSB WPR20CA312](https://openairdocs.org/ntsb/WPR20CA312.md): Beechcraft C90A · Fortuna, CA · Accident · No injuries · Class 4 · Data collection · Final report · Aug 31, 2020 · N982SB · Substantial damage > A collision with a deer while landing at night. - [NTSB WPR20CA046](https://openairdocs.org/ntsb/WPR20CA046.md): Beech 350 · Visalia, CA · Accident · No injuries · Data collection · Final report · Dec 17, 2019 · N160RW · 2 aircraft · Substantial damage > The single-engine pilot's failure to yield to traffic established on the taxiway, which resulted in a ground collision. - [NTSB WPR19IA030](https://openairdocs.org/ntsb/WPR19IA030.md): Cessna 208 · Bakersfield, CA · Incident · Minor injuries · Class 3 · Incident · Final report · Nov 24, 2018 · N781FE · No damage > The pilot's loss of consciousness while taxiing due to an accumulation of toxic levels of carbon dioxide gas inside the airplane as a result of dry ice sublimation. Also causal was the pilot's decision to fly the airplane in an unventilated configuration, the… - [NTSB GAA18CA528](https://openairdocs.org/ntsb/GAA18CA528.md): Beech 200 · Burbank, CA · Accident · No injuries · Data collection · Final report · Sep 3, 2018 · N97WC · Substantial damage > The flight instructor's and pilot receiving instruction's failure to maintain clearance from a tree while taxiing. - [NTSB GAA18CA309](https://openairdocs.org/ntsb/GAA18CA309.md): Air Tractor AT 402 · Nicolaus, CA · Accident · No injuries · Data collection · Final report · May 19, 2018 · N5128N · Substantial damage > The pilot’s failure to maintain adequate clearance from a power transmission wire. - [NTSB GAA18CA137](https://openairdocs.org/ntsb/GAA18CA137.md): Beech C90 · Montague, CA · Accident · No injuries · Data collection · Final report · Feb 12, 2018 · N118MF · Substantial damage > The failure of pilot to extend the landing gear during landing. - [NTSB GAA17CA303](https://openairdocs.org/ntsb/GAA17CA303.md): Dehavilland DHC 6 · Perris, CA · Accident · No injuries · Data collection · Final report · May 24, 2017 · N708PV · Substantial damage > The prospective pilot’s improper landing flare and the pilot’s delayed remedial action to initiate a go-around, which resulted in a runway excursion. - [NTSB WPR16FA153](https://openairdocs.org/ntsb/WPR16FA153.md): Piper PA-31T · McKinleyville, CA · Accident · 4 fatal · Field investigation · Final report · Jul 29, 2016 · N661TC · Destroyed > An inflight fire in the floor area near the main bus tie circuit breaker panel that resulted from chafing between an electrical wire and a hydraulic line and/or airplane structure. - [NTSB WPR16LA150](https://openairdocs.org/ntsb/WPR16LA150.md): Beech 65 A90 · Byron, CA · Accident · No injuries · Limited investigation · Final report · Jul 24, 2016 · N256TA · Substantial damage > The pilot’s failure to maintain an adequate airspeed and his exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall and subsequent spin. Also causal to the accident was the pilot’s failure to follow prescribed spin… - [NTSB WPR16FA148](https://openairdocs.org/ntsb/WPR16FA148.md): Air Tractor AT 502B · Zamora, CA · Accident · 1 fatal · Field investigation · Final report · Jul 23, 2016 · N502WC · 2 aircraft · Substantial damage > The failure of both pilots to maintain an adequate visual lookout, which resulted in a midair collision. Also causal was the other pilot's use of two sedating antihistamines and two impairing medication and the effect of sun glare on his visual lookout, which… - [NTSB GAA16CA303](https://openairdocs.org/ntsb/GAA16CA303.md): Air Tractor AT 502 · Nicolaus, CA · Accident · No injuries · Data collection · Final report · Jun 1, 2016 · N5091N · Substantial damage > The pilot's insufficient clearance from a power line during aerial application operations, which resulted in a power line strike, a forced landing on unsuitable terrain, loss of directional control, and collision with terrain. - [NTSB WPR16LA107](https://openairdocs.org/ntsb/WPR16LA107.md): Cessna 208B · Acampo, CA · Accident · Minor injuries · Limited investigation · Final report · May 12, 2016 · N1114A · Substantial damage > A total loss of engine power due to a fatigue fracture of the fuel pressure line that connected the fuel control unit and the fuel flow transducer due to vibration as the result of a fatigue fracture of an associated support clamp. Contributing to the… - [NTSB WPR15CA110](https://openairdocs.org/ntsb/WPR15CA110.md): Raytheon B300 · Mammoth Lakes, CA · Accident · No injuries · Data collection · Final report · Feb 10, 2015 · N49WC · Substantial damage > The airplane encountered extreme turbulence during descent. - [NTSB WPR14LA267](https://openairdocs.org/ntsb/WPR14LA267.md): Air Tractor AT 502B · Sacramento, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 23, 2014 · N61150 · Substantial damage > The total loss of engine power for reasons that could not be determined because the airplane was not available for postaccident examination. - [NTSB WPR14LA245](https://openairdocs.org/ntsb/WPR14LA245.md): Air Tractor AT 502B · Princeton, CA · Accident · No injuries · Limited investigation · Final report · Jun 13, 2014 · N502JS · Substantial damage > The partial loss of engine power during takeoff for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation. - [NTSB WPR13LA233](https://openairdocs.org/ntsb/WPR13LA233.md): Schweizer G-164D · Butte City, CA · Accident · Minor injuries · Limited investigation · Final report · May 16, 2013 · N83110 · Substantial damage > The pilot's failure to maintain airplane control after an encounter with wake turbulence while maneuvering at low altitude. Contributing to the accident was the pilot’s fatigue due to extended hours of wakefulness and high workload. - [NTSB WPR12LA433](https://openairdocs.org/ntsb/WPR12LA433.md): Air Tractor AT-502 · Firebaugh, CA · Accident · No injuries · Limited investigation · Final report · Sep 22, 2012 · N4556S · Substantial damage > The pilot’s decision to continue the takeoff after the engine stopped producing its full-rated torque while operating in high-density altitude conditions and his subsequent failure to maintain clearance from the power transmission wires. - [NTSB WPR12LA220](https://openairdocs.org/ntsb/WPR12LA220.md): Grumman G 164D · Nicolaus, CA · Accident · 1 fatal · Limited investigation · Final report · May 21, 2012 · N8267K · Substantial damage > The pilot’s failure to maintain airplane control during a low-altitude maneuver. - [NTSB WPR11CA222](https://openairdocs.org/ntsb/WPR11CA222.md): Thrush S2R-T34 · Pleasant Grove, CA · Accident · No injuries · Data collection · Final report · May 11, 2011 · N510CW · Substantial damage > The pilot's failure to maintain directional control during the landing. - [NTSB WPR11FA158](https://openairdocs.org/ntsb/WPR11FA158.md): Cessna 208B · Bakersfield, CA · Accident · No injuries · Field investigation · Final report · Mar 10, 2011 · N930FE · Substantial damage > The malfunction of a master brake cylinder, which resulted in a loss of braking action and subsequent loss of directional control and collision with three vehicles during taxi. Contributing to the accident was the inappropriate design and manufacture of the… - [NTSB WPR10LA260](https://openairdocs.org/ntsb/WPR10LA260.md): Socata TBM · Lost Hills, CA · Accident · No injuries · Limited investigation · Final report · May 23, 2010 · N750AB · Substantial damage > A loss of engine power for reasons that could not be determined because postaccident examination of the engine did not reveal any anomalies that would have precluded normal operation. Contributing to the accident was the pilot's failure to obtain the proper… - [NTSB WPR10LA141](https://openairdocs.org/ntsb/WPR10LA141.md): Cessna 208B · Sacramento, CA · Accident · No injuries · Limited investigation · Final report · Feb 19, 2010 · N892FE · Substantial damage > An in-flight collision with a bird while on final approach. - [NTSB WPR09LA451](https://openairdocs.org/ntsb/WPR09LA451.md): Raytheon B200 · Hayward, CA · Accident · No injuries · Limited investigation · Final report · Sep 16, 2009 · N726CB · Substantial damage > The pilot's failure to maintain directional control after takeoff. Contributing to the accident was the pilot's inadequate preflight and failure to follow the airplane manufacturer's checklist to ensure that the rudder trim control and right propeller control… - [NTSB WPR09CA064](https://openairdocs.org/ntsb/WPR09CA064.md): Air Tractor AT-502 · Dinuba, CA · Accident · No injuries · Data collection · Final report · Dec 16, 2008 · N1035F · Substantial damage > The failure of maintenance personnel to properly install the engine's Py line correctly, which resulted in the total loss of engine power and subsequent force landing. Contributing to the accident was the lack of suitable terrain. - [NTSB LAX07TA277](https://openairdocs.org/ntsb/LAX07TA277.md): Air Tractor AT-802A · Big Bear City, CA · Accident · No injuries · Final report · Sep 17, 2007 · N91357 · Substantial damage > Loss of engine power while maneuvering due to the failure of the number 1 bearing that was caused by electrical discharge damage to the bearing originating from the starter-generator. Contributing to the accident was the operator's failure to follow the… - [NTSB SEA07LA242](https://openairdocs.org/ntsb/SEA07LA242.md): Air Tractor AT-502B · Blythe, CA · Accident · No injuries · Limited investigation · Final report · Aug 29, 2007 · N6003G · Substantial damage > The pilot's failure to maintain adequate airspeed which resulted in a stall. A contributing factor was the high density altitude. - [NTSB SEA07LA204](https://openairdocs.org/ntsb/SEA07LA204.md): Air Tractor AT-502A · Chowchilla, CA · Accident · No injuries · Limited investigation · Final report · Jun 30, 2007 · N6176L · Substantial damage > The loss of engine power as the result of the fatigue fracture and separation of two compressor turbine blades, which induced a catastrophic failure of the compressor turbine section. - [NTSB LAX04LA275](https://openairdocs.org/ntsb/LAX04LA275.md): Air Tractor AT-502B · Mendota, CA · Accident · No injuries · Limited investigation · Final report · Jul 23, 2004 · N5010E · Substantial damage > The pilot's inadequate preflight/pretakeoff procedure by not lowering the wing flaps, which resulted in an inadvertent stall as the pilot attempted to climb out of ground effect to clear a corn crop at the end of the runway. A factor in the accident was the… - [NTSB LAX01LA019](https://openairdocs.org/ntsb/LAX01LA019.md): Beech 300 · Concord, CA · Accident · Serious injuries · Limited investigation · Final report · Oct 19, 2000 · N398DE · Substantial damage > the pilot's delayed decision to abort the takeoff and his failure to utilize the propeller's reverse pitch function. - [NTSB LAX00LA271](https://openairdocs.org/ntsb/LAX00LA271.md): Air Tractor AT-401 · Ripley, CA · Accident · No injuries · Limited investigation · Final report · Jul 13, 2000 · N4508Y · Substantial damage > A loss of engine power due to the separation of a connecting rod from the crankshaft. - [NTSB LAX00GA185](https://openairdocs.org/ntsb/LAX00GA185.md): Beech 65-90 · China Lake, CA · Accident · Serious injuries · Final report · May 5, 2000 · N32229 · Substantial damage > the inadvertent early deployment of the test parachute lines and dummy and it's entanglement with the horizontal stabilizer, which resulted from the operator's inadequate test plan substantiation process for shortening the parachute's static line.. - [NTSB LAX97LA125](https://openairdocs.org/ntsb/LAX97LA125.md): Cessna 425 · Fresno, CA · Accident · No injuries · Limited investigation · Final report · Mar 17, 1997 · N425TV · Substantial damage > failure of the right brake to function, due to the installation mechanic's failure to completely bleed all air from the lines. A factor in the accident was the pilot's decision to fly the unairworthy aircraft before the engine/propeller installation had been… - [NTSB LAX96LA328](https://openairdocs.org/ntsb/LAX96LA328.md): Cessna 425 · Auburn, CA · Accident · No injuries · Limited investigation · Final report · Sep 5, 1996 · N425WB · Substantial damage > failure of the right brake system (master cylinder O-ring seal). Factors relating to the accident were: the narrow runway, and the presence of a ditch adjacent to the runway. - [NTSB LAX96LA070](https://openairdocs.org/ntsb/LAX96LA070.md): Cessna 208B · Sacramento, CA · Accident · No injuries · Limited investigation · Final report · Dec 12, 1995 · N987FE · Substantial damage > the pilot was given an erroneous wind velocity due to a malfunctioning wind gauge in the control tower. Factors relating to the accident were: the high/gusty wind conditions, and the pilot's improper evaluation of the actual wind condition. - [NTSB LAX93LA337](https://openairdocs.org/ntsb/LAX93LA337.md): Cessna 208B · Los Angeles, CA · Accident · No injuries · Limited investigation · Final report · Aug 28, 1993 · N781FE · Substantial damage > The inattention of the driver of a service truck to yield to aircraft and subsequent collision with the airplane as it crossed the service roadway. - [NTSB LAX87DVA09](https://openairdocs.org/ntsb/LAX87DVA09.md): Ayres S2R-T34 · Mendota, CA · Accident · No injuries · Final report · May 21, 1987 · N4012Y · Substantial damage > During an agricultural application flight, the aircraft struck a pole that was located 30 feet within the field boundary. The pilot stated that due to the dawn light and the way the pole blended in with the field along with a light amount of chemical on the… ## 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" = 'CA' 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=CA --- 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.