Airworthiness directives › 2023-06-04
AD 2023-06-04 Airworthiness Directives; Bombardier, Inc., Airplanes
Applicability*9
This AD applies to Bombardier, Inc., airplanes, certificated in any category, with serial numbers as identified in the service information specified in paragraphs (c)(1) through (4) of this AD. (1) Model CL-600-1A11 (600) airplanes: Bombardier Service Bulletin 600-0777, dated December 13, 2021. (2) Model CL-600-2A12 (601) airplanes: Bombardier Service Bulletin 601-1109, Revision 01, dated May 6, 2022. (3) Model CL-600-2B16 (601-3A, 601-3R) airplanes: Bombardier Service Bulletin 601-1109, Revision 01, dated May 6, 2022. (4) Model CL-600-2B16 (604) airplanes: Bombardier Service Bulletin 604-35-007, Revision 01, dated May 6, 2022.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 5 years after the effective date of this AD, determine the part number of the drop-down oxygen box, in accordance with Section 2.B. of the Accomplishment Instructions of the applicable service information identified in paragraphs (c)(1) through (4) of this AD. (1) If any drop-down oxygen box part number (P/N) installed on the airplane matches any P/N listed in Table 1 of Section 2.B. of the applicable service information: Before further flight, perform drop-down oxygen mask reach testing in accordance with Section 2.B.(2) of the Accomplishment Instructions of the applicable service information identified in paragraphs (c)(1) through (4) of this AD. (i) If the test result is PASS: Before further flight, replace the drop-down oxygen box assembly in accordance with Section 2.C., and test the passenger oxygen supply system in accordance with Section 2.D.(2), of the applicable service information identified in paragraphs (c)(1) through (4) of this AD. (ii) If the test result is FAIL for any individual seat: Before further flight, mark the failed seat as inoperative in accordance with Section 2.B.(3) of the applicable service information specified in paragraphs (c)(1) through (4) of this AD. (2) If the part number of any drop-down oxygen box assembly installed on the airplane is not found in Table 1 of Section 2.B. of the applicable service information identified in paragraphs (c)(1) through (4) of this AD: Before further flight, do actions to correct the unsafe condition using a method approved in accordance with the procedures specified in paragraph (i)(1) of this AD.
Unsafe condition
This AD was prompted by reports of passenger oxygen mask dispensing units installed in the affected airplanes with lanyards that are too long to meet the proper length specifications of the airplane. The FAA is issuing this AD to address the inability to initiate flow of oxygen to the mask. The unsafe condition, if not addressed, could result in no indication to the passenger that they are not receiving oxygen in an emergency situation.
Affected ADs
None.
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