# Fuel controlling system - 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) › Fuel controlling system - NTSB code: 01057320 - Cases: 59 - In the probable cause: 55 - Fatal cases: 3 - All cases: https://openairdocs.org/ntsb-findings/01057320/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01057320/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/01057320 ## Cases per year (in the probable cause / all) - 2008: 3 / 4 - 2009: 4 / 5 - 2010: 3 / 3 - 2011: 4 / 4 - 2012: 3 / 3 - 2013: 3 / 3 - 2014: 2 / 2 - 2015: 3 / 3 - 2016: 2 / 2 - 2017: 4 / 4 - 2018: 3 / 4 - 2019: 2 / 2 - 2020: 3 / 4 - 2021: 4 / 4 - 2022: 4 / 4 - 2023: 1 / 1 - 2024: 6 / 6 - 2025: 1 / 1 ## Defining events in these cases - [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 23 cases - [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 16 cases - [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 9 cases - [Fire/smoke (non-impact)](https://openairdocs.org/ntsb-events/150): 4 cases - [Fuel related](https://openairdocs.org/ntsb-events/190): 3 cases - [Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333): 1 cases - [Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241): 1 cases - [Fuel starvation](https://openairdocs.org/ntsb-events/191): 1 cases - [Nose over/nose down](https://openairdocs.org/ntsb-events/096): 1 cases ## Aircraft models (registry) - [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 3 cases - [Bell 206B](https://openairdocs.org/model/bell-206b): 2 cases - [Ayres S2R-G6](https://openairdocs.org/model/ayres-s2r-g6): 2 cases - [Eurocopter AS 350 B3](https://openairdocs.org/model/eurocopter-as-350-b3): 1 cases - [Eurocopter AS 350 B2](https://openairdocs.org/model/eurocopter-as-350-b2): 1 cases - [Aerospatiale AS350BA](https://openairdocs.org/model/aerospatiale-as350ba): 1 cases - [S N I A S AS-350B ECUREUIL](https://openairdocs.org/model/s-n-i-a-s-as-350b-ecureuil): 1 cases - [Sikorsky S-76B](https://openairdocs.org/model/sikorsky-s-76b): 1 cases - [Piper PA-34-220T](https://openairdocs.org/model/piper-pa-34-220t): 1 cases - [Piper PA-28RT-201](https://openairdocs.org/model/piper-pa-28rt-201): 1 cases ## Other findings in the same cases - [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 6 cases - [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 5 cases - [Maintenance, general](https://openairdocs.org/ntsb-findings/02062000) (Personnel issues): 5 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 4 cases - [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 3 cases - [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 3 cases - [Replacement](https://openairdocs.org/ntsb-findings/02062020) (Personnel issues): 3 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 3 cases - [Incorrect action selection](https://openairdocs.org/ntsb-findings/02041010) (Personnel issues): 3 cases - [Engine (reciprocating), general](https://openairdocs.org/ntsb-findings/01058500) (Aircraft): 3 cases ## Newest cases - [NTSB ERA25LA242](https://openairdocs.org/ntsb/ERA25LA242), Jun 26, 2025: Cessna 182 (N4953N), Nahunta, GA, substantial damage. Probable cause: The pilot’s decision to fly an unairworthy airplane, which resulted in fire due to an unsecured carburetor bowl drain plug. - [NTSB ERA25LA011](https://openairdocs.org/ntsb/ERA25LA011), Oct 11, 2024: Saint Glasair II SFT (N952W), Forest, VA, substantial damage. Probable cause: The installation of a non-failsafe coupler that resulted in the separation of the throttle cable from the throttle arm and a subsequent partial loss of engine power. - [NTSB ERA24LA375](https://openairdocs.org/ntsb/ERA24LA375), Sep 10, 2024: Air Tractor AT-802 (N802JF), Hickory Valley, TN, substantial damage. Probable cause: A partial loss of engine power due to a leak in the fuel control unit bellows, which resulted in the fuel valve moving to minimum fuel flow. - [NTSB CEN24LA236](https://openairdocs.org/ntsb/CEN24LA236), Jun 23, 2024: Cirrus Design SR22T (N87AQ), Boerne, TX, substantial damage. Probable cause: Maintenance personnel’s inadequate adjustment of fuel flow, which resulted in an excessively rich mixture, a rough-running engine, and a subsequent partial loss of engine power. - [NTSB CEN24LA193](https://openairdocs.org/ntsb/CEN24LA193), May 19, 2024: Air Tractor AT-502 (N15189), Covert, KS, substantial damage. Probable cause: The improper maintenance of the fuel control unit, which resulted in air leakage and a loss of control of fuel flow to the engine. - [NTSB WPR24LA074](https://openairdocs.org/ntsb/WPR24LA074), Jan 16, 2024: Beck Michael J Sonex (N920MB), Auburn, WA, substantial damage. Probable cause: Water contamination within the fuel regulator air-reference system, which resulted in improper fuel metering and a loss of engine power during initial climb. - [NTSB CEN24LA088](https://openairdocs.org/ntsb/CEN24LA088), Jan 12, 2024: Eurocopter AS 350 B2 (N204TX), Spofford, TX, substantial damage. Probable cause: The fatigue failure of the fuel control unit control lever arm, which resulted in fuel starvation, and a loss of engine power. - [NTSB CEN23LA231](https://openairdocs.org/ntsb/CEN23LA231), Jun 6, 2023: Cessna 207 (N91157), Harlingen, TX, substantial damage. Probable cause: The improper installation of the throttle control arm to the throttle control cable attachment end, which resulted in a failure of the control arm and a loss of engine power in flight. - [NTSB CEN22FA405](https://openairdocs.org/ntsb/CEN22FA405), Sep 1, 2022: Cirrus SR22 (N420SS), Tomball, TX, substantial damage, 1 fatal. Probable cause: The flight instructor’s inadequate supervision of the flight, which allowed for an unintentional movement of the mixture control to the cutoff position that remained unnoticed until the airplane lost… - [NTSB CEN22LA391](https://openairdocs.org/ntsb/CEN22LA391), Aug 18, 2022: Beech F33A (N17747), Baton Rouge, LA, substantial damage. Probable cause: The sudden and total loss of fuel flow to the engine for undetermined reasons. 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. --- 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.