Oxygen — Courier Area Oxygen Distribution System Flexible Hoses — Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2019-0215
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform detailed inspections and functional tests of the affected flexible hoses within 1,600 flight hours after 18 September 2019 and repeat at intervals not exceeding 1,600 flight hours. Any damaged or leaking hoses found must be replaced before the next flight with either a serviceable or improved hose. All affected hoses must be replaced with improved parts within 42 months after 4 August 2021, and installation of affected parts is prohibited after modification.
Summary
EASA Airworthiness Directive 2021-0173 is an airworthiness directive addressing the inspection and replacement of flexible hoses in the courier area oxygen distribution system on certain Airbus A330-243, A330-322, and A330-343 aircraft modified with EASA Supplemental Type Certificates 10063795 and 10063798. The directive targets specific flexible hose part numbers prone to cracking, which could lead to oxygen leakage and potential injury to occupants. It mandates inspections, functional testing, and replacement with improved hoses to ensure continued airworthiness.
What changed
EASA Airworthiness Directive 2021-0173 supersedes the previous AD 2019-0215 and introduces a requirement to replace affected flexible hoses with improved serviceable parts within 42 months of the effective date. It retains the repetitive detailed inspections and functional testing from the previous AD but adds a terminating action through hose replacement using updated service bulletins. This AD also prohibits installation of affected parts after modification.
Why it matters
This directive is critical for operators and maintenance organizations to prevent oxygen leakage in the courier area oxygen system, which poses a safety risk during flight. Compliance ensures the integrity of oxygen distribution, reducing the risk of injury to crew or occupants in the courier area. It also provides clear instructions and deadlines for inspections and part replacements, aiding compliance teams in managing continuing airworthiness.
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