# Crew oxygen system

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft systems](https://openairdocs.org/ntsb-findings/0102) › [Oxygen system](https://openairdocs.org/ntsb-findings/010235) › Crew oxygen system
- NTSB code: 01023510
- Cases: 2
- In the probable cause: 1
- Fatal cases: 0
- All cases: https://openairdocs.org/ntsb-findings/01023510/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01023510/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01023510

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

- 2010: 0 / 1
- 2016: 1 / 1

## Defining events in these cases

- [Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331): 1 cases
- [Fire/smoke (non-impact)](https://openairdocs.org/ntsb-events/150): 1 cases

## Aircraft models (registry)

- [Cessna 501](https://openairdocs.org/model/cessna-501): 1 cases
- [Boeing 757-222](https://openairdocs.org/model/boeing-757-222): 1 cases

## Other findings in the same cases

- [Adequacy of policy/proc](https://openairdocs.org/ntsb-findings/04021015) (Organizational issues): 1 cases
- [Incorrect action selection](https://openairdocs.org/ntsb-findings/02041010) (Personnel issues): 1 cases
- [Other loss of consciousness](https://openairdocs.org/ntsb-findings/02012055) (Personnel issues): 1 cases
- [Dynamic load](https://openairdocs.org/ntsb-findings/01062032) (Aircraft): 1 cases
- [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 1 cases
- [Flight compartment windows](https://openairdocs.org/ntsb-findings/01035610) (Aircraft): 1 cases
- [Air distribution system](https://openairdocs.org/ntsb-findings/01022120) (Aircraft): 1 cases

## Newest cases

- [NTSB CEN16LA197](https://openairdocs.org/ntsb/CEN16LA197), May 24, 2016: Cessna 501 (N804ST), Texarkana, AR, substantial damage. Probable cause: The pilot's failure to use supplemental oxygen as required during high-altitude flight, which resulted in his loss of consciousness following a loss of cabin pressurization. Contributing to the…
- [NTSB ENG10IA029](https://openairdocs.org/ntsb/ENG10IA029), May 17, 2010: Boeing 757 (N510UA), Chantilly, VA, incident, minor damage. Probable cause: The ignition of the J5 power terminal located on the captain’s No. 1 windshield due to a loose electrical connection between the terminal connector lug and its respective terminal block. The loose…

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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