Airworthiness Directive · Amendment 39-16946 · 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 (S/N) 9002 through 9126 inclusive, 9128 through 9312 inclusive, 9314 through 9322 inclusive, 9324 through 9335 inclusive, 9337, 9338, 9340, 9341, 9343, 9344, 9346, 9347, 9350, 9353, 9355, 9356, 9358, 9361, 9365, 9372, 9374, 9384, 9402, 9403, and subsequent.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model BD-700-1A10 and BD-700-1A11 airplanes. This AD was prompted by a report of deformation at the neck of the pressure regulator body on certain oxygen cylinder and regulator assemblies (CRA). This AD requires an inspection to determine if a certain oxygen CRA is installed and the replacement of oxygen CRAs containing pressure regulators having a certain part number. We are issuing this AD to prevent elongation of the pressure regulator neck, which could result in rupture of the oxygen cylinder, and in the case of cabin depressurization, oxygen not being available when required.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
For airplanes having S/N 9002 through 9126 inclusive, 9128 through 9312 inclusive, 9314 through 9322 inclusive, 9324 through 9335 inclusive, 9337, 9338, 9340, 9341, 9343, 9344, 9346, 9347, 9350, 9353, 9355, 9356, 9358, 9361, 9365, 9372, 9374, 9384, 9402, and 9403: Within 7 months after the effective date of this AD, do an inspection of oxygen pressure regulators having P/N 806370-06 to determine if the serial number is listed in Table 2 of the Accomplishment Instructions of Bombardier Service Bulletin 700-35-011 (for Model BD-700-1A10 airplanes) or 700-1A11-35-010 (for Model BD-700-1A11 airplanes), both Revision 01, both dated February 1, 2011.
(1) If the serial number of the pressure regulator having P/N 806370-06 is listed in Table 2 of the Accomplishment Instructions of Bombardier Service Bulletin 700-35-011 (for Model BD-700-1A10 airplanes) or 700-1A11-35-010 (for Model BD-700-1A11 airplanes), both Revision 01, both dated February 1, 2011: Within 7 months after the effective date of this AD, replace the affected oxygen CRA, in accordance with paragraph 2.C. of the Accomplishment Instructions of Bombardier Service Bulletin 700-35-011 (for Model BD-700-1A10 airplanes) or 700-1A11-35-010 (for Model BD-700-1A11 airplanes), both Revision 01, both dated February 1, 2011.
(2) If the serial number of the oxygen pressure regulator having P/N 806370-06 is not listed in Table 2 of the Accomplishment Instructions of Bombardier Service Bulletin 700-35-011 (for Model BD-700-1A10 airplanes) or 700-1A11-35-010 (for Model BD-700-1A11 airplanes), both Revision 01, both dated February 1, 2011: No further action is required by this paragraph.
For all airplanes: As of the effective date of this AD, no person may install an oxygen pressure regulator (P/N 806370-06) having any serial number listed in Table 2 of the Accomplishment Instructions of Bombardier Service Bulletin 700-35-011 (for Model BD-700-1A10 airplanes) or 700-1A11-35-010 (for Model BD-700-1A11 airplanes), both Revision 01, both dated February 1, 2011, on any airplane, unless a suffix “-A” is beside the serial number.
