# Hypoxia/anoxia - 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) › Hypoxia/anoxia - NTSB code: 02012035 - Cases: 16 - In the probable cause: 11 - Fatal cases: 16 - All cases: https://openairdocs.org/ntsb-findings/02012035/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/02012035/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/02012035 ## Cases per year (in the probable cause / all) - 2008: 1 / 1 - 2009: 1 / 2 - 2011: 1 / 1 - 2012: 2 / 3 - 2014: 1 / 1 - 2015: 1 / 1 - 2016: 1 / 2 - 2018: 1 / 2 - 2019: 1 / 1 - 2022: 0 / 1 - 2023: 1 / 1 ## Defining events in these cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 9 cases - [Controlled flight into terr/obj (CFIT)](https://openairdocs.org/ntsb-events/120): 2 cases - [Unknown or undetermined](https://openairdocs.org/ntsb-events/000): 2 cases - [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 1 cases - [VFR encounter with IMC](https://openairdocs.org/ntsb-events/401): 1 cases - [Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331): 1 cases ## Aircraft models (registry) - [Socata TBM 700](https://openairdocs.org/model/socata-tbm-700): 1 cases - [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii): 1 cases - [Piper PA-34-200T](https://openairdocs.org/model/piper-pa-34-200t): 1 cases - [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 1 cases - [Piper PA-24-250](https://openairdocs.org/model/piper-pa-24-250): 1 cases - [Mooney M20TN](https://openairdocs.org/model/mooney-m20tn): 1 cases - [Mooney M20F](https://openairdocs.org/model/mooney-m20f): 1 cases - [Fairchild Heli-Porter PILATUS PC6/C-H2](https://openairdocs.org/model/fairchild-heli-porter-pilatus-pc6-c-h2): 1 cases - [Cirrus Design SR22T](https://openairdocs.org/model/cirrus-design-sr22t): 1 cases - [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 1 cases ## Other findings in the same cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 8 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 7 cases - [Performance/control parameters, general](https://openairdocs.org/ntsb-findings/01062000) (Aircraft): 6 cases - [Spatial disorientation](https://openairdocs.org/ntsb-findings/02022025) (Personnel issues): 3 cases - [Oxygen system, general](https://openairdocs.org/ntsb-findings/01023500) (Aircraft): 3 cases - [Below VFR minima](https://openairdocs.org/ntsb-findings/03035075) (Environmental issues): 2 cases - [Low visibility](https://openairdocs.org/ntsb-findings/03035015) (Environmental issues): 2 cases - [Prescription medication](https://openairdocs.org/ntsb-findings/02012025) (Personnel issues): 2 cases - [Illicit drug](https://openairdocs.org/ntsb-findings/02012020) (Personnel issues): 2 cases - [Fuel](https://openairdocs.org/ntsb-findings/01071010) (Aircraft): 2 cases ## Newest cases - [NTSB ERA23FA256](https://openairdocs.org/ntsb/ERA23FA256), Jun 4, 2023: Cessna 560 (N611VG), Montebello, VA, destroyed, 4 fatal. Probable cause: Pilot incapacitation due to loss of cabin pressure for undetermined reasons. Contributing to the accident was the pilot’s and owner/operator’s decision to operate the airplane without supplemental… - [NTSB CEN22FA145](https://openairdocs.org/ntsb/CEN22FA145), Mar 17, 2022: Piper PA-30 (N8357Y), Pond Creek, OK, destroyed, 3 fatal. Probable cause: The pilot’s loss of control of the airplane, resulting in an in-flight breakup. - [NTSB WPR19FA148](https://openairdocs.org/ntsb/WPR19FA148), May 17, 2019: Robinson R44 (N744TW), Alpine, UT, substantial damage, 2 fatal. Probable cause: The noninstrument-rated pilot’s continued visual flight rules flight into instrument meteorological conditions, which resulted in spatial disorientation and subsequent loss of control. Contributing… - [NTSB ERA19LA012](https://openairdocs.org/ntsb/ERA19LA012), Oct 13, 2018: Piper PA34 (N593MS), Westhampton Beach, NY, destroyed, 3 fatal. Probable cause: The instructor's decision to conduct and continue a visual flight rules flight into instrument meteorological conditions with a known flight instrument anomaly, which resulted in spatial… - [NTSB CEN18FA400](https://openairdocs.org/ntsb/CEN18FA400), Jan 3, 2018: Cirrus Design SR22T (N325JK), Gulf of Mexico (Gulf of Mexico), destroyed, 1 fatal. Probable cause: The pilot's incapacitation resulted in impact with the Gulf of Mexico. The reason the hypoxia recognition system did not descend the airplane as designed could not be determined as the airplane was… - [NTSB ANC17FA004](https://openairdocs.org/ntsb/ANC17FA004), Oct 29, 2016: Fairchild Heli-Porter Pilatus PC-6 (N5308F), Port Alsworth, AK, substantial damage, 1 fatal. Probable cause: The airplane's collision with mountainous terrain while operating in an area of reduced visibility and icing conditions. Contributing to the accident was the pilot's inadequate preflight planning,… - [NTSB CEN16FA086](https://openairdocs.org/ntsb/CEN16FA086), Jan 14, 2016: Beech C35 (N2025D), Meeker, CO, destroyed, 1 fatal. Probable cause: The non-instrument-rated pilot's decision to fly the airplane in instrument meteorological conditions at high altitude for greater than 30 minutes without the use of supplemental oxygen which… - [NTSB ERA15LA349](https://openairdocs.org/ntsb/ERA15LA349), Sep 10, 2015: Mooney M20TN (N370MM), Atlantic City (Atlantic Ocean), substantial damage, 1 fatal. Probable cause: A loose oxygen line, which was not detected by maintenance personnel during a recent annual inspection, that allowed oxygen to escape and drain the oxygen canister more quickly than the pilot… - [NTSB ERA14LA424](https://openairdocs.org/ntsb/ERA14LA424), Sep 5, 2014: Socata TBM 700 (N900KN), Caribbean Sea, A1, destroyed, 2 fatal. Probable cause: The design of the cabin pressurization system, which made it prone to unnecessary shutdown, combined with a checklist design that prioritized troubleshooting over ensuring that the pilot was… - [NTSB WPR13FA312](https://openairdocs.org/ntsb/WPR13FA312), Dec 17, 2012: Mooney M20F (N9524M), Yosemite Valley, CA, substantial damage, 1 fatal. Probable cause: The pilot’s decision to continue flight into instrument meteorological conditions, which resulted in his failure to maintain situational awareness and sufficient altitude to clear mountainous terrain. 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.