# Turbine section

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft power plant](https://openairdocs.org/ntsb-findings/0105) › [Engine (turbine/turboprop)](https://openairdocs.org/ntsb-findings/010572) › Turbine section
- NTSB code: 01057250
- Cases: 74
- In the probable cause: 67
- Fatal cases: 10
- All cases: https://openairdocs.org/ntsb-findings/01057250/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01057250/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01057250

## Cases per year (in the probable cause / all)

- 2008: 9 / 9
- 2009: 4 / 5
- 2010: 4 / 5
- 2011: 3 / 4
- 2012: 7 / 7
- 2013: 7 / 7
- 2014: 5 / 5
- 2015: 6 / 6
- 2016: 2 / 2
- 2017: 2 / 2
- 2018: 4 / 5
- 2019: 3 / 3
- 2020: 0 / 1
- 2021: 3 / 3
- 2022: 3 / 3
- 2023: 1 / 2
- 2024: 3 / 3
- 2025: 1 / 2

## Defining events in these cases

- [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 33 cases
- [Uncontained engine failure](https://openairdocs.org/ntsb-events/343): 12 cases
- [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 12 cases
- [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 11 cases
- [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 1 cases
- [Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470): 1 cases
- [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 1 cases
- [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 1 cases
- [Fire/smoke (non-impact)](https://openairdocs.org/ntsb-events/150): 1 cases
- [Controlled flight into terr/obj (CFIT)](https://openairdocs.org/ntsb-events/120): 1 cases

## Aircraft models (registry)

- [Cessna 208B](https://openairdocs.org/model/cessna-208b): 4 cases
- [Mcdonnell Douglas Helicopter 369E](https://openairdocs.org/model/mcdonnell-douglas-helicopter-369e): 3 cases
- [Bell 407](https://openairdocs.org/model/bell-407): 3 cases
- [Bell Helicopter Textron 206L-1](https://openairdocs.org/model/bell-helicopter-textron-206l-1): 3 cases
- [Eurocopter AS 350 B2](https://openairdocs.org/model/eurocopter-as-350-b2): 2 cases
- [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d): 2 cases
- [Boeing 757-232](https://openairdocs.org/model/boeing-757-232): 2 cases
- [Boeing 747-451](https://openairdocs.org/model/boeing-747-451): 2 cases
- [Bell 206-L4](https://openairdocs.org/model/bell-206-l4): 2 cases
- [Bell 206B](https://openairdocs.org/model/bell-206b): 2 cases

## Other findings in the same cases

- [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 4 cases
- [Oil system](https://openairdocs.org/ntsb-findings/01057261) (Aircraft): 4 cases
- [Engine (turbine/turboprop), general](https://openairdocs.org/ntsb-findings/01057200) (Aircraft): 4 cases
- [Equipment manufacture](https://openairdocs.org/ntsb-findings/04013010) (Organizational issues): 3 cases
- [Tree(s)](https://openairdocs.org/ntsb-findings/03022020) (Environmental issues): 3 cases
- [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 3 cases
- [Scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520) (Personnel issues): 3 cases
- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 3 cases
- [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 3 cases
- [Oversight of reg compliance](https://openairdocs.org/ntsb-findings/04032040) (Organizational issues): 2 cases

## Newest cases

- [NTSB ENG25WA049](https://openairdocs.org/ntsb/ENG25WA049), Jun 29, 2025: Embraer EMB145 (5N-BZY), Sokoto, Nigeria, incident, no damage
- [NTSB ENG25WA034](https://openairdocs.org/ntsb/ENG25WA034), Mar 13, 2025: Airbus A321 (XA-VXP), Ciudad de México, Mexico, occurrence, no damage
- [NTSB ENG24LA028](https://openairdocs.org/ntsb/ENG24LA028), Jul 26, 2024: Bell 407 (N793SF), Oktaha, OK, incident, minor damage. Probable cause: 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…
- [NTSB WPR24FA132](https://openairdocs.org/ntsb/WPR24FA132), Apr 26, 2024: Bell 206-L4 (N988B), Anaconda, MT, destroyed, 1 fatal. Probable cause: 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…
- [NTSB ERA24LA148](https://openairdocs.org/ntsb/ERA24LA148), Mar 18, 2024: Hughes 369D (N102SU), Belleville, WV, substantial damage. Probable cause: 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), Dec 28, 2023: Bell Helicopter Textron 206L-1 (N571CJ), Walland, TN, substantial damage. Probable cause: 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), Aug 4, 2023: Air Tractor AT502 (N5048S), Leipsic, OH, substantial damage. Probable cause: 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), Sep 1, 2022: Sikorsky S-61N (N617CK), Shady Cove, OR, substantial damage. Probable cause: 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), Jul 11, 2022: Air Tractor AT-502B (N5850R), Decatur, IL, substantial damage. Probable cause: Fracture of the compressor turbine (CT) blades due to creep.
- [NTSB ERA22FA279](https://openairdocs.org/ntsb/ERA22FA279), Jun 22, 2022: Bell UH-1B (N98F), Amherstdale, WV, destroyed, 6 fatal. Probable cause: 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…

NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted.

Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1).

NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names.

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