Oxygen System — Crew Oxygen Line Contamination
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must clean and flush the crew oxygen system following the procedures in MHIRJ Service Bulletin 670BA-35-016 Revision B or approved later revisions. Compliance must be achieved within 8800 flight hours from the effective date of 14 March 2022 unless already completed. Maintenance records should document the accomplishment of these actions to demonstrate compliance with the directive.
Summary
Canadian Airworthiness Directive CF-2022-06 addresses contamination in the crew oxygen lines of MHI RJ Aviation ULC aircraft, including models CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25. The directive mandates cleaning and flushing procedures to remove lubricant contamination from oxygen tubes that may pose fire and health risks. This directive applies to specific serial numbers and tube part numbers installed after certain dates as detailed in MHIRJ Service Bulletin 670BA-35-016 Revision B.
What changed
CF-2022-06 introduces a mandatory requirement to clean and flush the crew oxygen system to eliminate lubricant contamination caused by a non-conforming degreasing process during manufacturing. It specifies compliance with the procedures outlined in MHIRJ Service Bulletin 670BA-35-016 Revision B or earlier approved revisions. This is a new regulation aimed at mitigating fire hazards and health risks associated with contaminated oxygen lines.
Why it matters
This directive is critical for aviation professionals because contaminated oxygen lines can lead to fires or inhalation of harmful lubricant fumes, posing serious safety risks to crew members. Operators and maintenance organizations must ensure compliance to maintain airworthiness and avoid operational disruptions. Compliance teams need to track affected aircraft and implement corrective actions within the specified timeframe to meet regulatory requirements.
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