Airworthiness Directive · Amendment 39-22072 · Oxygen
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes, certificated in any category, serial numbers 9002 through 9879 inclusive and 9998.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This AD was prompted by reports of oxygen leaks caused by cracked, brittle, or broken oxygen hoses that were found during scheduled maintenance tests of the airplane oxygen system. This AD requires an inspection of the oxygen hose assembly to determine if an affected part number is installed, and replacement of affected oxygen hoses. For certain airplanes, this AD allows repetitive testing of the oxygen system until affected hoses are replaced. This AD also prohibits installation of an affected oxygen hose. The FAA is issuing this AD to address the unsafe condition on these products.
Within 6 months after the effective date of this AD: Do an inspection of the oxygen hose assembly to determine if any hose having a part number (P/N) in the O2C20T1 series is installed, in accordance with the Accomplishment Instructions of the applicable service information specified in figure 1 to paragraph (g) of this AD. If P/N O2C20T1 series is installed, or if any test fails as specified in paragraph (h) of this AD, before further flight, replace all the oxygen hoses, in accordance with the Accomplishment Instructions of the applicable service information specified in figure 1 to paragraph (g) of this AD.
For airplanes identified in figure 2 of paragraph (h) of this AD: The oxygen hose replacement, if required by paragraph (g) of this AD, may be delayed if all conditions specified in paragraphs (h)(1) through (3) of this AD are met.
(1) The oxygen system is tested at the applicable times specified in paragraph (h)(1)(i) or (ii) of this AD, in accordance with the Accomplishment Instructions of the applicable service information specified in figure 2 to paragraph (h) of this AD.
(i) If the Aircraft Completion Center Supplemental Type Certificate (STC) for the passenger cabin interior was issued within 5 years before the effective date of this AD: The oxygen system is tested within 6 months after the effective date of this AD, and thereafter at intervals not to exceed 30 months.
(ii) If the Aircraft Completion Center STC for the passenger cabin interior was issued 5 years or more before the effective date of this AD: The oxygen system is tested within 6 months after the effective date of this AD, and thereafter at intervals not to exceed 15 months.
(2) All P/N O2C20T1 series hoses are replaced before further flight as specified in paragraph (g) of this AD after any hose fails any test.
(3) Except as specified by paragraph (h)(2) of this AD, all P/N O2C20T1 series hoses are replaced within 10 years after issuance of the Aircraft Completion Center STC for the passenger cabin interior as specified in paragraph (g) of this AD provided that all P/N O2C20T1 series hoses in the flight compartment and the third crew (left-hand side enclosure) are replaced within 6 months after the effective date of this AD.
