# Final NTSB investigations: Uncontained engine failure 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 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 ENG24LA014](https://openairdocs.org/ntsb/ENG24LA014.md): Boeing 787 · Singapore, Singapore · Incident · No injuries · Class 3 · Limited · Final report · May 14, 2024 · N27957 · Minor damage > The uncontained left engine failure was caused by the failure and liberation of the HPT stage 1 aft blade retainer as a result of a fatigue crack in the upper collet radius that originated from a surface connected cluster of Oxide/Carbonitride/Nitride/Carbide… - [NTSB ENG23LA034](https://openairdocs.org/ntsb/ENG23LA034.md): Hall Lester R Legacy · Rochester, MN · Incident · No injuries · Class 3 · Limited · Final report · Jul 20, 2023 · N707MM · Minor damage > Mechanically distressed reduction gears causing an engine overspeed and turbine blade tensile overload and subsequent uncontainment. Contributing to the uncontainment was the operator’s use of the engine after knowingly purchasing the engine in an… - [NTSB ENG21LA011](https://openairdocs.org/ntsb/ENG21LA011.md): Cessna 501 · Opa Locka, FL · Incident · No injuries · Class 3 · Limited · Final report · Dec 31, 2020 · N75TL · Minor damage > An uncontained left engine failure caused by a low cycle fatigue crack that originated from a manufacturing machining groove on the high pressure compressor impeller aft face. Contributing to the incident was service bulletin borescope inspection criteria… - [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 CEN18FA259](https://openairdocs.org/ntsb/CEN18FA259.md): Eurocopter Deutschland EC135 P1 · Chicago, IL · Accident · Serious injuries · Field investigation · Final report · Jul 8, 2018 · N312SA · Substantial damage > The pilot's inadvertent disabling of the No. 1 and No. 2 engines' electronic engine control systems, which resulted in engine and rotor overspeed conditions, a subsequent autorotation, and a hard landing. Contributing to the accident were the pilot's… - [NTSB CEN18LA127](https://openairdocs.org/ntsb/CEN18LA127.md): MX MXS · Fulton, TX · Accident · Minor injuries · Limited investigation · Final report · Mar 25, 2018 · N540JH · Substantial damage > A total loss of engine power due to the fatigue failure of the crankshaft, which resulted in the pilot’s forced landing to an abandoned airport and the airplane’s subsequent impact with debris on the runway. - [NTSB WPR18LA051](https://openairdocs.org/ntsb/WPR18LA051.md): Piper PA 32-300 · Hinesville, GA · Accident · Minor injuries · Class 3 · Limited · Final report · Dec 14, 2017 · N4326X · Substantial damage > A total loss of engine power due to the failure of a connecting rod. - [NTSB ENG17IA027](https://openairdocs.org/ntsb/ENG17IA027.md): Boeing 737 7H4 · Washington, DC · Incident · No injuries · Incident investigation · Final report · Jun 3, 2017 · N765SW · Minor damage > The failure the control alternator gearshaft, which disconnected the accessory gearbox from the rest of the engine and resulted in an uncommanded in-flight shutdown of the left engine and subsequent flight diversion. The control alternator gearshaft failed… - [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 DCA15FA185](https://openairdocs.org/ntsb/DCA15FA185.md): Boeing Boeing 777-236 · Las Vegas, NV · Accident · Serious injuries · Field investigation · Final report · Sep 8, 2015 · G-VIIO · Substantial damage > The failure of the left engine high-pressure compressor (HPC) stage 8-10 spool, which caused the main fuel supply line to become detached from the engine main fuel pump and release fuel, resulting in a fire on the left side of the airplane. The HPC stage 8-10… - [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 ENG14IA013](https://openairdocs.org/ntsb/ENG14IA013.md): Raytheon 400A · Sugar Land, TX · Incident · No injuries · Incident investigation · Final report · May 13, 2014 · N412GJ · Minor damage > The probable cause of the uncontained No. 2 engine failure on the Raytheon Beechjet 400A was a yellow-crowned night-heron birdstrike that resulted in fan blade contact with the inlet case and rub induced excitation of a previously unidentified natural… - [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 CEN13LA378](https://openairdocs.org/ntsb/CEN13LA378.md): Bell 206B · St Louis, MO · Accident · No injuries · Limited investigation · Final report · May 24, 2013 · N297CA · Substantial damage > The loss of engine power due to the separation of compressor blades, which resulted from 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 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. - [NTSB ENG12IA012](https://openairdocs.org/ntsb/ENG12IA012.md): Mcdonnell Douglas MD-10-30F · Portland, OR · Incident · No injuries · Incident investigation · Final report · Feb 13, 2012 · N304FE · Minor damage > The fracture of the fan mid shaft due to a stress corrosion cracking initiated by local regions of corrosion pitting, which resulted from oil migration within the shaft and its subsequent degradation. - [NTSB ENG12IA003](https://openairdocs.org/ntsb/ENG12IA003.md): Boeing 747-451 · Detroit, MI · Incident · No injuries · Incident investigation · Final report · Oct 23, 2011 · N661US · Minor damage > The penetration of turbine blade fragments through the rear turbine case, which punctured the No. 4 bearing oil pressure supply tube, allowing misted oil to contact the hot engine case and ignite the undercowl fire. Contributing to the incident was the… - [NTSB ENG12IA001](https://openairdocs.org/ntsb/ENG12IA001.md): Boeing 757-251 · Atlanta, GA · Incident · No injuries · Incident investigation · Final report · Oct 10, 2011 · N553NW · Minor damage > the return to service of overhauled airplane engine parts with undetected fatigue cracks, resulting in complete loss of engine power and uncontained engine failure. A contributing factor was the inadequate diffuser and HPT case inspection procedure. - [NTSB ENG11IA043](https://openairdocs.org/ntsb/ENG11IA043.md): Mcdonnell Douglas DC-9-51 · Atlanta, GA · Incident · No injuries · Incident investigation · Final report · Aug 6, 2011 · N676MC · Minor damage > The probable cause of the No. 2 engine failure and subsequent aborted takeoff was the high cycle fatigue failure of a fan blade near the blade root that resulted in extensive low pressure compressor damage and compressor case breach. - [NTSB ENG11IA032](https://openairdocs.org/ntsb/ENG11IA032.md): Dehavilland DHC-6-300 · Peach Springs, AZ · Incident · No injuries · Incident investigation · Final report · May 21, 2011 · N178GC · No damage > A quality control failure in the Sungear, Inc. manufacturing and quality control process allowed sungears with surface finishes of the root fillet radius of the spline that did not conform to the drawing specifications to be released. The surface finish… - [NTSB ENG10IA037](https://openairdocs.org/ntsb/ENG10IA037.md): Douglas DC9 · Minneapolis, MN · Incident · No injuries · Incident investigation · Final report · Jun 15, 2010 · N671MC · Minor damage > The failure of the facility that overhauled the 1st stage fan blade to properly restore the leading edge, which caused a flutter mode resulting in a fatigue crack and fracture of the fan blade. - [NTSB ENG09IA004](https://openairdocs.org/ntsb/ENG09IA004.md): Mcdonnell-Douglas DC-10-30 · Bogota, Colombia · Incident · No injuries · Incident investigation · Final report · Mar 26, 2009 · N526MD · Minor damage > Failure of the low pressure turbine stage 3 disk due to a design that is vulnerable to high pressure turbine unbalance-induced synchronous vibration that cannot be detected in flight, and the subsequent uncontained engine failure. - [NTSB ENG08IA030](https://openairdocs.org/ntsb/ENG08IA030.md): Boeing B747 · Jeddah, Saudi Arabia · Incident · Incident investigation · Final report · Jul 5, 2008 · HS-VAC · Minor damage > Failure of the low pressure turbine stage 3 disk due to a design that is vulnerable to high pressure turbine unbalance-induced synchronous vibration that cannot be detected in flight, and the subsequent uncontained engine failure. ## 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."completionStatus" = 'Completed' AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '343' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-events/343/sequence?status=final --- 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.