# Passenger 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) › Passenger oxygen system
- NTSB code: 01023520
- Cases: 1
- In the probable cause: 1
- Fatal cases: 0
- All cases: https://openairdocs.org/ntsb-findings/01023520/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01023520/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01023520

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

- 2008: 1 / 1

## Defining events in these cases

- [Electrical system malf/failure](https://openairdocs.org/ntsb-events/332): 1 cases

## Aircraft models (registry)

- [Boeing 767-200](https://openairdocs.org/model/boeing-767-200): 1 cases

## Other findings in the same cases

- [Policy/procedure, general](https://openairdocs.org/ntsb-findings/04021000) (Organizational issues): 1 cases
- [Equip certification/testing](https://openairdocs.org/ntsb-findings/04012015) (Organizational issues): 1 cases
- [Smoke, detection](https://openairdocs.org/ntsb-findings/01022611) (Aircraft): 1 cases

## Newest cases

- [NTSB DCA08MA076](https://openairdocs.org/ntsb/DCA08MA076), Jun 28, 2008: Boeing 767 (N799AX), San Francisco, CA, destroyed. Probable cause: The design of the supplemental oxygen system hoses and the lack of positive separation between electrical wiring and electrically conductive oxygen system components. The lack of positive separation…

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.