Oxygen — Passenger Oxygen System — Oxygen Dispensing Unit Lanyards Excessively Long
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bombardier CL-600-1A11, CL-600-2A12, and CL-600-2B16 aircraft must perform the special check of oxygen mask part numbers and conduct reach testing within five years of the AD's effective date, September 8, 2022. Failed seats must be marked inoperative until the oxygen mask assemblies are replaced and the oxygen supply system is tested as per the applicable Bombardier service bulletin instructions.
Summary
Canadian Airworthiness Directive CF-2022-50 addresses the issue of excessively long oxygen dispensing unit lanyards in passenger oxygen systems installed on Bombardier Inc. CL-600-1A11, CL-600-2A12, and CL-600-2B16 aircraft models. The directive mandates inspection and replacement of affected mask dispensing units to ensure proper oxygen flow during emergencies. This AD applies to specific serial numbers as identified in the relevant Bombardier service bulletins.
What changed
CF-2022-50 introduces a new requirement for operators to verify the part numbers of drop-down oxygen boxes and conduct reach testing on passenger oxygen masks. If the masks fail testing, affected seats must be marked inoperative until the oxygen mask assemblies are replaced with units meeting ergonomic specifications. The directive also requires testing the oxygen supply system after replacement.
Why it matters
This directive is critical for ensuring passenger safety by preventing oxygen flow failures during emergencies caused by overly long lanyards on oxygen masks. Compliance helps operators avoid in-flight safety hazards and regulatory penalties. Maintenance and compliance teams must update procedures to include the special checks, testing, and replacements mandated by this AD.
More for Bombardier CL-600 (Challenger)
All 47- EASA AD CF-2026-41Time Limits/Maintenance Checks – Airworthiness Limitations – AmendmentAug 24, 2026
- EASA AD CF-2025-51R1Flight Controls — Uncommanded and Unarrested Flap MovementDec 2, 2025
- EASA AD CF-2025-36Fuselage, Stabilizers, Wings, Exhaust SystemJul 9, 2025
- EASA AD CF-2025-06Auxiliary Power Unit (APU) — APU Muffler Drainage Blockage Causing Fuel Leakage AccumulationJan 27, 2025
- EASA AD CF-2025-05Landing Gear — Uncommanded Steering
Get the next one by email
New ADs and bulletins for Bombardier CL-600 (Challenger), CL-600-1A11, CL-600-2A12 and CL-600-2B16, summarized like this page, every Monday.