Airworthiness DirectiveEASA AD CF-2018-03

Oxygen System — Cabin Crew and Lavatory Oxygen Masks Deployed Tangled

Published: Jan 22, 2018
Effective: Feb 2, 2018
Deadline: Feb 2, 2022

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Operators of affected Bombardier aircraft must repack and modify the specified oxygen box assemblies within 8800 flight hours or 48 months from the effective date of February 2, 2018, whichever occurs first. They must also replace packaging placards and re-identify assemblies per the relevant Bombardier Service Bulletins. Furthermore, maintenance teams must discontinue use of superseded AMM tasks and adopt the updated tasks within 30 days after completing the repacking or from the effective date, whichever is later.

Summary

Canadian Airworthiness Directive CF-2018-03 addresses an issue with oxygen systems on Bombardier Inc. aeroplanes, specifically models CL-600-2B19, CL-600-2C10, CL-600-2D15/CL-600-2D24, and CL-600-2E25. The directive focuses on the tangled deployment of cabin crew and lavatory oxygen masks caused by incorrect packing of oxygen box assemblies. This AD mandates repacking and modification of affected oxygen box assemblies to ensure proper oxygen mask deployment during emergencies.

What changed

This new Airworthiness Directive introduces mandatory repacking and modification of forward flight attendant, aft flight attendant, and lavatory oxygen box assemblies on specified Bombardier aircraft models. It also requires replacement of packaging placards and re-identification of assemblies according to Bombardier Service Bulletins. Additionally, it prohibits the use of superseded Aircraft Maintenance Manual tasks for oxygen mask repacking and mandates the use of updated tasks.

Why it matters

Proper oxygen mask deployment is critical for occupant safety during high altitude emergencies. Incorrectly packed oxygen box assemblies can cause tangled masks, leading to delayed oxygen access and potential occupant distress. Compliance with this AD ensures that operators and maintenance organizations maintain oxygen systems that function reliably, thereby enhancing passenger and crew safety and regulatory compliance.

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