# NTSB investigations: Turbine section 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. Page 1 of 2 · 74 cases ## Latest cases - [NTSB ENG25WA049](https://openairdocs.org/ntsb/ENG25WA049.md): Embraer EMB145 · Sokoto, Nigeria · Incident · Class 3 · Foreign · Jun 29, 2025 · 5N-BZY · No damage - [NTSB ENG25WA034](https://openairdocs.org/ntsb/ENG25WA034.md): Airbus A321 · Ciudad de México, Mexico · Occurrence · Class 5 · Foreign · Mar 13, 2025 · XA-VXP · No damage - [NTSB ENG24LA028](https://openairdocs.org/ntsb/ENG24LA028.md): Bell 407 · Oktaha, OK · Incident · No injuries · Class 3 · Limited · Final report · Jul 26, 2024 · N793SF · Minor damage > The loss of engine power due to high cycle fatigue failure of a power turbine stage 3 turbine wheel blade. The resulting engine imbalance caused a decoupling of the gas producer stage 1 and stage 2 turbine wheels leading to a stage 1 turbine overspeed and… - [NTSB WPR24FA132](https://openairdocs.org/ntsb/WPR24FA132.md): Bell 206-L4 · Anaconda, MT · Accident · 1 fatal · Class 3 · Field · Final report · Apr 26, 2024 · N988B · Destroyed > A total loss of engine power due to a loss of cooling oil to the turbine-to-compressor coupling shaft and subsequent fracture of the shaft at an altitude too low for the pilot to complete a successful autorotation. Contributing to the accident was carbon… - [NTSB ERA24LA148](https://openairdocs.org/ntsb/ERA24LA148.md): Hughes 369D · Belleville, WV · Accident · Serious injuries · Class 3 · Limited · Final report · Mar 18, 2024 · N102SU · Substantial damage > The ingestion of foreign object debris into the engine, which resulted in a sudden loss of engine power and a subsequent collision with trees and terrain during the forced landing. - [NTSB ERA24LA076](https://openairdocs.org/ntsb/ERA24LA076.md): Bell Helicopter Textron 206L-1 · Walland, TN · Accident · No injuries · Class 3 · Limited · Final report · Dec 28, 2023 · N571CJ · Substantial damage > The improper installation of the No. 8 bearing spanner nut, which resulted in the No. 8 bearing’s failure, and the subsequent total loss of engine power. - [NTSB ERA23LA327](https://openairdocs.org/ntsb/ERA23LA327.md): Air Tractor AT502 · Leipsic, OH · Accident · No injuries · Class 3 · Limited · Final report · Aug 4, 2023 · N5048S · Substantial damage > The incorrect assembly of the turbine engine’s reduction gear box second-stage ring gear, which resulted in an internal failure of multiple engine components and a total loss of power. - [NTSB WPR22LA330](https://openairdocs.org/ntsb/WPR22LA330.md): Sikorsky S-61N · Shady Cove, OR · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 1, 2022 · N617CK · Substantial damage > A total loss of engine power due to the failure of the No. 2 engine’s stage 1 turbine blades as a result of an unreported hot start two days earlier. - [NTSB CEN22LA312](https://openairdocs.org/ntsb/CEN22LA312.md): Air Tractor AT-502B · Decatur, IL · Accident · No injuries · Class 3 · Limited · Final report · Jul 11, 2022 · N5850R · Substantial damage > Fracture of the compressor turbine (CT) blades due to creep. - [NTSB ERA22FA279](https://openairdocs.org/ntsb/ERA22FA279.md): Bell UH-1B · Amherstdale, WV · Accident · 6 fatal · Class 1 · Field · Final report · Jun 22, 2022 · N98F · Destroyed > the operator’s failure to adequately inspect the former military turbine powered helicopter, which allowed an engine issue to progress and result in a loss of engine power and a subsequent loss of control after the helicopter struck powerlines during a forced… - [NTSB ERA22FA086](https://openairdocs.org/ntsb/ERA22FA086.md): Swearingen SA226 · Bedford, NH · Accident · 1 fatal · Class 3 · Field · Final report · Dec 11, 2021 · N54GP · Destroyed > The pilot’s failure to secure and feather the left engine and increase power on the right engine after a perceived loss of engine power in the left engine, which resulted in a loss of control and impact with terrain just short of the runway. Contributing to… - [NTSB DCA21FA174](https://openairdocs.org/ntsb/DCA21FA174.md): Boeing 737-275C · Honolulu, HI · Accident · Serious injuries · Class 2 · Field · Final report · Jul 2, 2021 · N810TA · Destroyed > The flight crewmembers’ misidentification of the damaged engine (after leveling off the airplane and reducing thrust) and their use of only the damaged engine for thrust during the remainder of the flight, resulting in an unintentional descent and forced… - [NTSB ENG21LA013](https://openairdocs.org/ntsb/ENG21LA013.md): Boeing 767-338 · Ontario, CA · Incident · Class 3 · Limited · Final report · Jan 29, 2021 · N363CM · Minor damage > The fatigue fracture and liberation of two airfoils from a low pressure turbine stage 5 nozzle segment that impacted and damaged the downstream low pressure stage 5 blades creating an initial imbalance load in the engine’s low pressure turbine rotor… - [NTSB ENG20LA046](https://openairdocs.org/ntsb/ENG20LA046.md): Thrush S2R-H80 · Donalsonville, GA · Incident · No injuries · Class 3 · Limited · Final report · Sep 28, 2020 · N6216K · Minor damage > A total loss of engine power due to a loose torque meter attachment nut in the reduction gearbox that jammed the planetary gearset causing the power turbine shaft to separate from the power turbine disk, resulting in the power turbine overspeeding and… - [NTSB WPR20LA007](https://openairdocs.org/ntsb/WPR20LA007.md): Hiller UH 12E · Susanville, CA · Accident · Minor injuries · Class 3 · Limited · Final report · Oct 14, 2019 · N131HA · Substantial damage > A partial loss of engine power due to multiple overtemperature events and a hot start event, which resulted in thermally damaged internal components of the engine. Contributing to the accident was the lack of suitable terrain on which to perform the forced… - [NTSB WPR19LA122](https://openairdocs.org/ntsb/WPR19LA122.md): Bell 206 · Oakridge, OR · Accident · No injuries · Class 3 · Limited · Final report · Apr 26, 2019 · N206JH · Substantial damage > A total loss of engine power following the failure of a 3rd stage turbine blade due to low- and high-cycle fatigue. - [NTSB WPR19FA091](https://openairdocs.org/ntsb/WPR19FA091.md): Bell UH1B · Forks, WA · Accident · 1 fatal · Class 2 · Field · Final report · Mar 8, 2019 · N64RA · Destroyed > A total loss of engine power due to the failure of the gas generator sealing disk as a result of the operator’s exceedance of the sealing disk life limits at too low an altitude for the pilot to accomplish a successful autorotation which resulted in the… - [NTSB ENG19IA008](https://openairdocs.org/ntsb/ENG19IA008.md): Airbus A220 · Busan, South Korea · Incident · Class 3 · Incident · Final report · Dec 26, 2018 · HL8314 · No damage > The manufacturer’s inadequate cleaning of the crucible before melting the nickel alloy used in casting the low pressure turbine stage 3 blades that resulted in a casting anomaly from where an intergranular crack occurred became the origin of a fatigue crack… - [NTSB ENG18IA036](https://openairdocs.org/ntsb/ENG18IA036.md): Boeing 757 · Atlanta, GA · Incident · Class 3 · Incident · Final report · Sep 6, 2018 · N668DN · Minor damage > A right engine turbine uncontainment resulting from failure of the high pressure turbine (HPT) lenticular seal due to a fatigue crack originating from an overheated region at a knife edge tip. Contributing to the failure was Pratt & Whitney’s decision to… - [NTSB WPR18LA234](https://openairdocs.org/ntsb/WPR18LA234.md): Air Tractor AT 400 · Grand Forks, ND · Accident · Serious injuries · Class 3 · Limited · Final report · Aug 21, 2018 · N7300M · Substantial damage > The loss of engine power while maneuvering due to the failure of the power turbine blade assembly for reasons that could not be determined based on available evidence. - [NTSB WPR18LA222](https://openairdocs.org/ntsb/WPR18LA222.md): Air Tractor AT802 · Northport, WA · Accident · Serious injuries · Class 3 · Limited · Final report · Aug 14, 2018 · N397AS · Substantial damage > A total loss of engine power during a climb due to an accumulation of molten environmental particles, the source of which could not be determined based on the available evidence, which resulted in a forced landing. - [NTSB WPR18LA140](https://openairdocs.org/ntsb/WPR18LA140.md): Bell OH 58C · Yuma, AZ · Accident · No injuries · Class 3 · Limited · Final report · May 12, 2018 · N82857 · Substantial damage > A partial loss of engine power during an aerial application flight due to thermal damage to the 1st stage gas producer turbine nozzle and an irregular fuel spray pattern due to carbon buildup of the fuel nozzle. Contributing to the accident was maintenance… - [NTSB ERA17MA316](https://openairdocs.org/ntsb/ERA17MA316.md): Eurocopter Deutschland MBB BK 117 · Hertford, NC · Accident · 4 fatal · Class 2 · Major · Final report · Sep 8, 2017 · N146DU · Destroyed > A failure of the rear bearing in the No. 2 engine, which (1) created multiple and likely unexpected and confusing cockpit indications, resulting in the pilot's improper diagnosis and subsequent erroneous shutdown of the No. 1 engine, and (2) the resulting… - [NTSB CEN17LA254](https://openairdocs.org/ntsb/CEN17LA254.md): Cessna 208B · Alpine, TX · Accident · Minor injuries · Limited investigation · Final report · Jul 3, 2017 · N9714B · Substantial damage > Fracture of a compressor turbine (CT) blade due to operational overtemperatures and the failure of a maintenance technician to detect an existing crack in the CT blade during the last engine inspection. - [NTSB ENG17IA006](https://openairdocs.org/ntsb/ENG17IA006.md): Bombardier CL 600 2C10 · Kansas, IL · Incident · No injuries · Incident investigation · Final report · Nov 29, 2016 · N367CA · No damage > The probable cause of the uncontained No. 1 (left) engine failure was a separated high pressure turbine 2nd stage blade that failed due to a fatigue crack that originated below the blade platform from an area of corrosion. - [NTSB DCA17FA021](https://openairdocs.org/ntsb/DCA17FA021.md): Boeing 767 · Chicago, IL · Accident · Serious injuries · Class 1 · Field · Final report · Oct 28, 2016 · N345AN · Substantial damage > The failure of the high-pressure turbine (HPT) stage 2 disk, which severed the main engine fuel feed line and breached the right main wing fuel tank, releasing fuel that resulted in a fire on the right side of the airplane during the takeoff roll. The HPT… - [NTSB ENG16IA001](https://openairdocs.org/ntsb/ENG16IA001.md): Boeing 747 · Russian airspace, Japan · Incident · No injuries · Incident investigation · Final report · Oct 2, 2015 · N662US · Minor damage > The PW4056 engine experienced an in-flight loss of power because of damage to the low-pressure turbine (LPT) because of the inadequate overhaul inspection and repair instructions that existed at the time of the LPT module's last overhaul. A vane hook in the… - [NTSB CEN15LA370](https://openairdocs.org/ntsb/CEN15LA370.md): Bell 206B · Cresco, IA · Accident · No injuries · Limited investigation · Final report · Aug 18, 2015 · N5743W · Substantial damage > The loss of engine power due to the high-cycle fatigue failure of the third-stage turbine wheel. - [NTSB WPR15LA177](https://openairdocs.org/ntsb/WPR15LA177.md): Bell 206 L4 · Dewey, AZ · Accident · No injuries · Limited investigation · Final report · Jun 2, 2015 · N73AW · Substantial damage > A total loss of engine power due to the failure of the No. 2 bearing, which resulted from a fractured separator. - [NTSB CEN15LA202](https://openairdocs.org/ntsb/CEN15LA202.md): Fairchild SA227 AC · Rifle, CO · Accident · No injuries · Limited investigation · Final report · Apr 17, 2015 · N2691W · Substantial damage > The uncontained engine failure due to the fatigue failure of the second-stage turbine rotor disk. - [NTSB ENG15IA017](https://openairdocs.org/ntsb/ENG15IA017.md): Boeing 707 338C · Victorville, CA · Incident · No injuries · Incident investigation · Final report · Apr 10, 2015 · N624RH · Minor damage > the fracture of one 1st stage turbine blade from a high cycle fatigue crack that originated from a break in the coating on the leading edge of the blade. The cause for the break in the coating could not be determined. Contributing to the uncontained release… - [NTSB ERA15LA138](https://openairdocs.org/ntsb/ERA15LA138.md): Bell 206 · Sevierville, TN · Accident · No injuries · Limited investigation · Final report · Feb 15, 2015 · N3176L · Substantial damage > An uncontained engine failure, which resulted from insufficient lubrication of the No. 4 bearing due to carbon buildup on the filter screen of the bearing's oil supply nozzle. - [NTSB ENG14IA028](https://openairdocs.org/ntsb/ENG14IA028.md): Airbus A320 232 · Long Beach, CA · Incident · No injuries · Incident investigation · Final report · Sep 18, 2014 · N656JB · Minor damage > The probable cause of the engine failure and subsequent undercowl engine fire was due to the fatigue fracture of a high pressure turbine stage 2 disk blade retaining lug that released two blades which impacted the low pressure turbine case causing a fuel line… - [NTSB WPR14IA297](https://openairdocs.org/ntsb/WPR14IA297.md): Beech B100 · Bakersfield, CA · Incident · No injuries · Incident investigation · Final report · Jul 17, 2014 · N6756P · Minor damage > The failure of the 2nd-stage turbine wheel due to an improper repair of the 2nd-stage stator assembly, which the manufacturer does not consider a repairable item. Contributing to the incident was the designated engineering representative's approval of the… - [NTSB CEN14LA358](https://openairdocs.org/ntsb/CEN14LA358.md): Grumman Acft ENG Cor-Schweizer G-164B · Garrison, ND · Accident · No injuries · Limited investigation · Final report · Jul 9, 2014 · N6648Q · Substantial damage > Excessive wear between the power turbine shaft and quill shaft spline, which led to the disconnection of the power turbine wheel, an overspeed of the power turbine, and the subsequent loss of engine power. Contributing to the accident was maintenance… - [NTSB WPR14TA236](https://openairdocs.org/ntsb/WPR14TA236.md): Mcdonnell Douglas Helicopter 369E · Mesa, AZ · Accident · No injuries · Final report · Jun 8, 2014 · N504MP · Substantial damage > The loss of engine power during cruise flight due to the decoupling of the engine’s turbine and compressor sections. Contributing to the decoupling was the excessive wear of the turbine-to-compressor coupling components due maintenance personnel’s placement… - [NTSB CEN14FA232](https://openairdocs.org/ntsb/CEN14FA232.md): Bell 407 · Telluride, CO · Accident · No injuries · Field investigation · Final report · May 3, 2014 · N407MH · Substantial damage > The failure of the power turbine thrust (No. 5) bearing due to overheating as a result of oil starvation, which led to the engine failure. Also causal to the accident was an undocumented repair to the gearbox cover oil delivery tube port during which an… - [NTSB WPR14FA068](https://openairdocs.org/ntsb/WPR14FA068.md): Cessna 208B · Kalaupapa, HI · Accident · 1 fatal · Field investigation · Final report · Dec 12, 2013 · N687MA · Destroyed > The loss of engine power due to the fracture of multiple blades on the compressor turbine wheel, which resulted in a ditching. The reason for the blade failures could not be determined due to secondary thermal damage to the blades. - [NTSB WPR14FA024](https://openairdocs.org/ntsb/WPR14FA024.md): Cessna 208 · Wailea, HI · Accident · No injuries · Field investigation · Final report · Oct 22, 2013 · N861MA · Substantial damage > Improper maintenance that resulted in contamination of the engine's compressor turbine disc and blade assembly by glass bead remnants, which resulted in a blade failure. - [NTSB ENG14IA001](https://openairdocs.org/ntsb/ENG14IA001.md): Airbus A319 132 · Greenville, TX · Incident · No injuries · Incident investigation · Final report · Oct 15, 2013 · N516NK · Minor damage > A high pressure turbine 2nd stage blade separation due to stress corrosion cracking in the J channel cooling cavity. The failed blade entered the gas path and caused substantial damage to the low pressure turbine. The engine was subsequently left at a high… - [NTSB CEN14FA004](https://openairdocs.org/ntsb/CEN14FA004.md): Bell 206L 3 · Venice, LA · Accident · 1 fatal · Field investigation · Final report · Oct 9, 2013 · N54LP · Substantial damage > A total loss of engine power due to the liberation of a second stage turbine blade near the blade root due to a high-cycle fatigue crack and subsequent overload. Although extensive testing and materials analysis was performed, the reason for crack initiation… - [NTSB ENG13IA036](https://openairdocs.org/ntsb/ENG13IA036.md): Boeing Company, Long Beach Div Boeing MD-11 · Aguadilla, PR · Incident · No injuries · Incident investigation · Final report · Aug 31, 2013 · PH-MCW · Minor damage > an insufficiently robust flange attachment hardware design, which failed to contain engine components that were liberated during an LPT mechanical failure, resulting in engine/nacelle uncontainment. A factor in the incident was the lack of a module-level LPT… - [NTSB WPR13LA390](https://openairdocs.org/ntsb/WPR13LA390.md): Bell Helicopter Textron 206L-1 · Payson, AZ · Accident · Serious injuries · Limited investigation · Final report · Aug 28, 2013 · N2018R · Substantial damage > A partial loss of engine power due to an overtemperature event that thermally damaged the turbine blades and vanes, which resulted in a hard landing. - [NTSB WPR13GA374](https://openairdocs.org/ntsb/WPR13GA374.md): Mcdonnell Douglas Helicopter 369E · Burns, OR · Accident · No injuries · Final report · Aug 12, 2013 · N62PJ · Substantial damage > The total loss of engine power during cruise flight due to the separation of one of the 4th-stage turbine wheel blades due to low-cycle fatigue cracking that had progressed to high-cycle fatigue cracking, which ultimately led to the overload failure of the… - [NTSB CEN13FA080](https://openairdocs.org/ntsb/CEN13FA080.md): Cessna 208B · Bryans Corner, OK · Accident · Minor injuries · Field investigation · Final report · Nov 30, 2012 · N1324G · Substantial damage > The total loss of engine power as a result of a fractured compressor turbine blade due to fatigue cracking. - [NTSB ENG13IA005](https://openairdocs.org/ntsb/ENG13IA005.md): Boeing MD-88 · Atlanta, GA · Incident · No injuries · Incident investigation · Final report · Nov 7, 2012 · N908DE · No damage > The 4th stage turbine blade separation that resulted in an uncontained release of low pressure turbine blade material was Delta Air Lines' repair process for the turbine blades' tip shrouds. It was not possible to identify the part of the repair process that… - [NTSB CEN13FA049](https://openairdocs.org/ntsb/CEN13FA049.md): Cessna 208B · Wichita, KS · Accident · 1 fatal · Field investigation · Final report · Nov 6, 2012 · N793FE · Substantial damage > The total loss of engine power as a result of a fractured compressor turbine blade due to high-cycle fatigue. - [NTSB CEN12TA550](https://openairdocs.org/ntsb/CEN12TA550.md): MD Helicopter 369 · Columbus, OH · Accident · No injuries · Final report · Aug 16, 2012 · N551CP · Substantial damage > The failure of a 4th-stage turbine blade due to high-cycle fatigue, which resulted in the loss of engine power. - [NTSB CEN12LA242](https://openairdocs.org/ntsb/CEN12LA242.md): Bell 407 · Aberdeen, SD · Accident · Minor injuries · Limited investigation · Final report · Apr 14, 2012 · N509MT · Substantial damage > The fatigue failure of two turbine engine blades due to vibration. - [NTSB CEN12LA235](https://openairdocs.org/ntsb/CEN12LA235.md): Eurocopter SA315B · Alva, OK · Accident · No injuries · Limited investigation · Final report · Mar 30, 2012 · N929JV · Substantial damage > Failure of the current and previous operators to comply with the manufacturer's maintenance procedures for operation in sandy environments, which resulted in turbine case erosion and the subsequent uncontained engine failure. Next page: https://openairdocs.org/ntsb-findings/01057250/cases.md?page=2 ## 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 f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '01057250')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-findings/01057250/cases --- 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.