# Turbine governor

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft power plant](https://openairdocs.org/ntsb-findings/0105) › [Engine fuel and control](https://openairdocs.org/ntsb-findings/010573) › Turbine governor
- NTSB code: 01057323
- Cases: 5
- In the probable cause: 5
- Fatal cases: 1
- All cases: https://openairdocs.org/ntsb-findings/01057323/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01057323/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01057323

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

- 2009: 2 / 2
- 2010: 2 / 2
- 2016: 1 / 1

## Defining events in these cases

- [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 2 cases
- [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 2 cases
- [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 1 cases

## Aircraft models (registry)

- [Eurocopter AS 350 B2](https://openairdocs.org/model/eurocopter-as-350-b2): 1 cases
- [Aerospatiale AS350BA](https://openairdocs.org/model/aerospatiale-as350ba): 1 cases
- [Garlick Helicopters OH-58A+](https://openairdocs.org/model/garlick-helicopters-oh-58a-plus): 1 cases
- [Mcdonnell Douglas Helicopter 369E](https://openairdocs.org/model/mcdonnell-douglas-helicopter-369e): 1 cases
- [Bell OH-58A](https://openairdocs.org/model/bell-oh-58a): 1 cases

## Other findings in the same cases

- [Maintenance, general](https://openairdocs.org/ntsb-findings/02062000) (Personnel issues): 2 cases
- [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 1 cases
- [Manufacture/production, general](https://openairdocs.org/ntsb-findings/04013000) (Organizational issues): 1 cases
- [Sloped/uneven terrain](https://openairdocs.org/ntsb-findings/03021017) (Environmental issues): 1 cases
- [Rough terrain](https://openairdocs.org/ntsb-findings/03021015) (Environmental issues): 1 cases
- [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 1 cases
- [Descent rate](https://openairdocs.org/ntsb-findings/01062037) (Aircraft): 1 cases
- [Aircraft capability, general](https://openairdocs.org/ntsb-findings/01061000) (Aircraft): 1 cases
- [Fuel controlling system](https://openairdocs.org/ntsb-findings/01057320) (Aircraft): 1 cases
- [Turbine section](https://openairdocs.org/ntsb-findings/01057250) (Aircraft): 1 cases

## Newest cases

- [NTSB CEN16FA171](https://openairdocs.org/ntsb/CEN16FA171), May 4, 2016: Mcdonnell Douglas Helicopter 369E (N629JK), Reedsville, WI, substantial damage, 1 fatal. Probable cause: The failure of the power turbine governor's dual-spool bearing due to a lack of lubrication, which resulted in a complete loss of engine power and subsequent impact with terrain.
- [NTSB WPR11FA045](https://openairdocs.org/ntsb/WPR11FA045), Nov 12, 2010: Eurocopter AS350B2 (N1231A), Pacoima, CA, substantial damage. Probable cause: The contamination of a spool bearing in the power turbine governor during manufacture, which led to the bearing’s failure in flight, a subsequent loss of engine power during departure, and the…
- [NTSB ERA10LA362](https://openairdocs.org/ntsb/ERA10LA362), Jul 15, 2010: Garlick Helicopters OH-58A+ (N802JB), Rowley, MA, substantial damage. Probable cause: The failure of the power turbine governor internal driveshaft bearings, resulting in the failure of the governor.
- [NTSB WPR10FA085](https://openairdocs.org/ntsb/WPR10FA085), Dec 16, 2009: Eurocopter AS350BA (FX2) (N87EW), Hana, Maui, HI, substantial damage. Probable cause: An uncommanded engine shutdown due to an improperly calibrated fuel control unit (FCU) and power turbine governor (PTG). Also causal was the operator’s inadequate maintenance practices and procedures…
- [NTSB ERA10GA015](https://openairdocs.org/ntsb/ERA10GA015), Oct 11, 2009: Bell OH-58A (N911AF), Ocala, FL, substantial damage. Probable cause: The excessive wear and failure of engine governor components for undetermined reasons, which resulted in a loss of engine power.

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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