# Carbon monoxide - Type: NTSB finding subsection - Path: [Personnel issues](https://openairdocs.org/ntsb-findings/02) › [Physical](https://openairdocs.org/ntsb-findings/0201) › [Impairment/incapacitation](https://openairdocs.org/ntsb-findings/020120) › Carbon monoxide - NTSB code: 02012040 - Cases: 12 - In the probable cause: 12 - Fatal cases: 11 - All cases: https://openairdocs.org/ntsb-findings/02012040/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/02012040/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/02012040 ## Cases per year (in the probable cause / all) - 2013: 1 / 1 - 2015: 1 / 1 - 2016: 2 / 2 - 2017: 2 / 2 - 2018: 1 / 1 - 2019: 1 / 1 - 2020: 3 / 3 - 2022: 1 / 1 ## Defining events in these cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 5 cases - [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 3 cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 2 cases - [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 1 cases - [Low altitude operation/event](https://openairdocs.org/ntsb-events/220): 1 cases ## Aircraft models (registry) - [Varga 2150A](https://openairdocs.org/model/varga-2150a): 1 cases - [Piper PA-38-112](https://openairdocs.org/model/piper-pa-38-112): 1 cases - [Piper PA-28-236](https://openairdocs.org/model/piper-pa-28-236): 1 cases - [Mooney M20C](https://openairdocs.org/model/mooney-m20c): 1 cases - [Bellanca 14-19-3](https://openairdocs.org/model/bellanca-14-19-3): 1 cases - [Aeronca 7AC](https://openairdocs.org/model/aeronca-7ac): 1 cases - [Cessna 310R](https://openairdocs.org/model/cessna-310r): 1 cases - [Cessna 207](https://openairdocs.org/model/cessna-207): 1 cases - [Cessna 210](https://openairdocs.org/model/cessna-210): 1 cases - [Cessna 172H](https://openairdocs.org/model/cessna-172h): 1 cases ## Other findings in the same cases - [Engine exhaust, general](https://openairdocs.org/ntsb-findings/01057800) (Aircraft): 10 cases - [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 3 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 2 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 2 cases - [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 2 cases - [Performance/control parameters, general](https://openairdocs.org/ntsb-findings/01062000) (Aircraft): 2 cases - [Freezing rain/sleet](https://openairdocs.org/ntsb-findings/03035040) (Environmental issues): 1 cases - [Wind, general](https://openairdocs.org/ntsb-findings/03034000) (Environmental issues): 1 cases - [Scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520) (Personnel issues): 1 cases - [Engine out control](https://openairdocs.org/ntsb-findings/01062025) (Aircraft): 1 cases ## Newest cases - [NTSB ERA22FA114](https://openairdocs.org/ntsb/ERA22FA114), Feb 1, 2022: Cessna 310 (N622QT), Danville, VA, destroyed, 1 fatal. Probable cause: The pilot’s impairment due to exposure to carbon monoxide as a result of undetected engine exhaust penetration into the cockpit, resulting in the pilot's failure to maintain a minimum controllable… - [NTSB CEN21LA070](https://openairdocs.org/ntsb/CEN21LA070), Nov 30, 2020: Piper PA38 (N9879T), Franklin, AR, destroyed, 2 fatal. Probable cause: The impairment of both pilots from carbon monoxide exposure due to a degraded muffler. Contributing to the accident was the inadequate maintenance inspection, which failed to detect the degraded… - [NTSB CEN21LA030](https://openairdocs.org/ntsb/CEN21LA030), Oct 26, 2020: Cessna 210 (N9622T), Lubbock, TX, destroyed, 1 fatal. Probable cause: The pilot’s improper decision to fly into icing conditions with an airplane that was not equipped for icing, which led to structural icing and a subsequent loss of airplane control, and the pilot’s… - [NTSB ERA20FA068](https://openairdocs.org/ntsb/ERA20FA068), Jan 6, 2020: Cessna 172 (N1612F), Newborn, GA, destroyed, 1 fatal. Probable cause: The pilot’s impairment/incapacitation from carbon monoxide poisoning due to a degraded muffler. Contributing to the accident was the pilot’s failure to properly maintain the airplane. - [NTSB ERA20FA031](https://openairdocs.org/ntsb/ERA20FA031), Nov 4, 2019: Cessna 150 (N714LK), New Bedford, MA, destroyed, 1 fatal. Probable cause: Pilot impairment due to exposure to carbon monoxide as a result of undetected corrosion and holes in the engine’s left exhaust muffler. - [NTSB WPR19FA022](https://openairdocs.org/ntsb/WPR19FA022), Nov 9, 2018: Piper PA28 (N91770), Guthrie Center, IA, substantial damage, 4 fatal. Probable cause: Pilot incapacitation due to carbon monoxide poisoning as a result of an undetected crack in an engine exhaust muffler, which permitted entry of exhaust gasses into the cabin via the cabin heat system. - [NTSB CEN17FA207](https://openairdocs.org/ntsb/CEN17FA207), Jun 1, 2017: Varga 2150A (N4635V), Bowling Green, OH, substantial damage, 1 fatal. Probable cause: The pilot's loss of control due to impairment from carbon monoxide poisoning. Contributing to the accident was the corrosion of the heat exchanger and the failure of maintenance personnel to… - [NTSB CEN17LA101](https://openairdocs.org/ntsb/CEN17LA101), Feb 3, 2017: Mooney M20C (N9149V), Ellendale, MN, substantial damage. Probable cause: The pilot’s incapacitation from carbon monoxide poisoning in flight due to cracks in the exhaust muffler, which resulted in the airplane’s continued flight until it ran out of fuel and its subsequent… - [NTSB ANC16FA065](https://openairdocs.org/ntsb/ANC16FA065), Sep 11, 2016: Hefty Polar Cub (N62905), Anchorage, AK, destroyed, 1 fatal. Probable cause: The pilot's severe impairment from carbon monoxide poisoning in flight, which resulted in a loss of control and a subsequent collision with trees and terrain. - [NTSB CEN16FA130](https://openairdocs.org/ntsb/CEN16FA130), Mar 20, 2016: Aeronca 7AC (N84580), Ellsworth, NE, destroyed, 1 fatal. Probable cause: The pilot's impairment due to carbon monoxide poisoning from a known cracked engine exhaust muffler, which resulted in a loss of aircraft control. Contributing to the accident was the pilot's… 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.