Airworthiness directives › 2012-12-17
AD 2012-12-17 Airworthiness Directives; Bombardier, Inc. Airplanes
Applicability*9
This AD applies to Bombardier, Inc. Model BD-100-1A10 (Challenger 300) airplanes, certificated in any category, serial numbers (S/N)s 20003 and subsequent.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Required actions
For airplanes having S/Ns 20003 through 20291 inclusive: Within 750 flight hours, or within 6 months after the effective date of this AD, whichever occurs first, inspect oxygen pressure regulators having part number (P/N) 806370-06 or 806370-14, to determine the serial number, in accordance with paragraph 2.B.(2) of the Accomplishment Instructions of Bombardier Service Bulletin 100-35-05, Revision 02, dated January 31, 2011. (1) If the serial number of the oxygen pressure regulator is listed in table 2 of the Accomplishment Instructions of Bombardier Service Bulletin 100-35-05, Revision 02, dated January 31, 2011, replace the affected oxygen CRA, in accordance with paragraph 2.C. of the Accomplishment Instructions of Bombardier Service Bulletin 100-35-05, Revision 02, dated January 31, 2011. (2) If the serial number of the oxygen pressure regulator is not listed in table 2 of the Accomplishment Instructions of Bombardier Service Bulletin 100-35-05, Revision 02, dated January 31, 2011, no further action is required by this paragraph.
Unsafe condition
This AD was prompted by reports of deformation found at the neck of the pressure regulator body on the oxygen cylinder and regulator assembly (CRA). 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.
Affected ADs
None.
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