Sun, Jul 17, 2022
AD 2022-14-07 Prompted By Reports That Some Oxygen Box Assemblies Had Their Piston Ejected During The Mask Deployment Test
The FAA is adopting a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes.
This AD was prompted by reports that some oxygen box assemblies had their piston ejected during the mask deployment test. This AD requires a one-time inspection of each passenger oxygen box dual manifold assembly to find and replace affected parts. This AD also prohibits installing affected parts. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective August 19, 2022.
Supplementary Information: Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued TCCA AD CF-2021-30, dated September 7, 2021 (TCCA AD CF-2021-30) (also referred to after this as the Mandatory Continuing Airworthiness Information, or the MCAI), to correct an unsafe condition for all Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes.
You may examine the MCAI in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA-2022-0470. The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. The NPRM published in the Federal Register on April 26, 2022 (87 FR 24476). The NPRM was prompted by reports that some oxygen box assemblies had their piston ejected during the mask deployment test. The NPRM proposed to require a one-time inspection of each passenger oxygen box dual manifold assembly to find and replace affected parts. The NPRM also proposed to prohibit installing affected parts. The FAA is issuing this AD to address a possible in-service piston ejection when used for emergency descent, smoke, or fire that may result in a high rate of oxygen leakage, which could prematurely deplete the oxygen for all passengers. See the MCAI for additional background information.
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