Aircraft Oxygen System Inspection Checklist [FREE PDF]

Aircraft oxygen systems are life-critical components subject to rigorous inspection requirements under FAA 14 CFR Part 43 and Part 145, requiring certified mechanics to verify serviceability before each flight operation. Regulatory standards mandate that all oxygen equipment, including masks, regulators, cylinders, and distribution lines, be inspected at specified intervals to prevent hypoxia-related incidents. This checklist provides a structured, audit-ready framework aligned with FAA Advisory

  • Industry: Aircraft Maintenance
  • Frequency: Per Event
  • Estimated Time: 30-45 minutes
  • Role: Aircraft Mechanic
  • Total Items: 36
  • Compliance: FAA 14 CFR Part 43 - Maintenance, Preventive Maintenance, Rebuilding and Alteration, FAA 14 CFR Part 145 - Repair Stations, FAA Advisory Circular AC 43.13-1B Chapter 12 - Oxygen Systems, FAA 14 CFR Part 91.211 - Supplemental Oxygen Requirements, FAA 14 CFR Part 25.1441 - Oxygen Equipment and Supply

Oxygen Cylinder Inspection

Verify the physical condition, certification status, and serviceability of all oxygen cylinders aboard the aircraft.

  • Are all oxygen cylinders within their required hydrostatic test date?
  • Are oxygen cylinders free from dents, corrosion, cracks, or visible damage?
  • Is cylinder pressure within the approved operating range for this aircraft type?
  • Are cylinder pressure gauge readings recorded?
  • Are cylinder mounting brackets, straps, and fittings secure and free of wear?
  • Is a cylinder condition photo captured for maintenance records?

Regulators and Shutoff Valves

Inspect all oxygen regulators, pressure reducing valves, and shutoff valves for proper function and condition.

  • Are all oxygen regulators free from physical damage and contamination?
  • Do pressure regulators deliver correct output pressure as specified in the AMM?
  • Are all shutoff valves operating smoothly without binding or leaks?
  • Are regulator overboard discharge indicators (blow-out discs) intact and correct color?
  • Are valve packing and seals free from deterioration or leakage?

Distribution Lines and Fittings

Inspect all oxygen tubing, hoses, connectors, and fittings for integrity and proper routing.

  • Are all oxygen distribution lines free from kinks, chafing, or abrasion damage?
  • Are all oxygen line fittings torqued to specification and free of leaks?
  • Are oxygen lines properly segregated from hydraulic, fuel, and electrical systems?
  • Are all line support clamps and brackets installed and secure?
  • Have all accessible fittings been leak-tested with approved detection fluid?

Flight Crew Oxygen Masks and Equipment

Verify flight crew oxygen masks, quick-donning capability, and associated equipment are serviceable.

  • Are quick-donning crew oxygen masks functional and donnable in 5 seconds with one hand?
  • Are crew mask microphone and interphone systems operational?
  • Are crew masks free from deterioration, cracking, or seal damage?
  • Are crew mask stowage boxes accessible and undamaged?
  • Is the 100% emergency oxygen selector on crew masks functional?

Passenger Oxygen System

Inspect passenger cabin oxygen delivery system including chemical generators or plumbed masks.

  • Are all passenger oxygen mask modules secure in their stowage positions?
  • Are chemical oxygen generators within their service life expiration date?
  • Are passenger mask lanyards and deployment mechanisms unobstructed and functional?
  • Is the number of available passenger oxygen masks meeting or exceeding the minimum required?
  • Is the automatic deployment system armed and operational per AMM test procedure?

Portable Oxygen Equipment

Inspect portable oxygen bottles used for first aid and walk-around use by cabin crew.

  • Are all portable oxygen bottles charged to required pressure?
  • Are portable oxygen bottles within hydrostatic test certification dates?
  • Are therapeutic oxygen masks and tubing in good condition and properly connected?
  • Are portable oxygen units properly secured in their approved stowage locations?
  • Are portable oxygen flow selectors and regulators functional at all flow settings?

Maintenance Documentation and Sign-Off

Ensure all inspection findings are documented per FAA recordkeeping requirements.

  • Have all discrepancies found during this inspection been entered in the aircraft maintenance log?
  • Have all replaced components been documented with part numbers, serial numbers, and TSN/TSO?
  • Is the oxygen system inspection annotated in the aircraft's continuous airworthiness maintenance program?
  • Are any open deferred items captured in the aircraft MEL with appropriate limitations noted?
  • Additional inspection notes or corrective actions taken?

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Why Use This Aircraft Oxygen System Inspection Checklist [FREE PDF]?

This aircraft oxygen system inspection checklist [free pdf] helps aircraft maintenance teams maintain compliance and operational excellence. Designed for aircraft mechanic professionals, this checklist covers 36 critical inspection points across 7 sections. Recommended frequency: per event.

Ensures compliance with FAA 14 CFR Part 43 - Maintenance, Preventive Maintenance, Rebuilding and Alteration, FAA 14 CFR Part 145 - Repair Stations, FAA Advisory Circular AC 43.13-1B Chapter 12 - Oxygen Systems, FAA 14 CFR Part 91.211 - Supplemental Oxygen Requirements, FAA 14 CFR Part 25.1441 - Oxygen Equipment and Supply. Regulatory-aligned for audit readiness and inspection documentation.

Frequently Asked Questions

What does the Aircraft Oxygen System Inspection Checklist [FREE PDF] cover?

This checklist covers 36 inspection items across 7 sections: Oxygen Cylinder Inspection, Regulators and Shutoff Valves, Distribution Lines and Fittings, Flight Crew Oxygen Masks and Equipment, Passenger Oxygen System, Portable Oxygen Equipment, Maintenance Documentation and Sign-Off. It is designed for aircraft maintenance operations and compliance.

How often should this checklist be completed?

This checklist should be completed per event. Each completion takes approximately 30-45 minutes.

Who should use this Aircraft Oxygen System Inspection Checklist [FREE PDF]?

This checklist is designed for Aircraft Mechanic professionals in the aircraft maintenance industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.

Can I download this checklist as a PDF?

Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.

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