Airworthiness directives › 2025-07-09
AD 2025-07-09 Airworthiness Directives; Bombardier, Inc., Airplanes
Applicability*9
This AD applies to Bombardier, Inc., airplanes, identified in paragraphs (c)(1) through (3), certificated in any category, equipped with Scott (Avox/Zodiac) 5500 or 5600 series 11 cubic foot portable oxygen bottle(s) with upper bracket part number (P/N) 36758-02, P/N 36758-12 or P/N H3-2091-1 installed at the neck of the bottle(s). (1) Model CL-600-1A11 (600) airplanes, serial numbers (S/Ns) 1004 through 1085 inclusive. (2) Model CL-600-2A12 (601) airplanes, serial numbers 3001 through 3066 inclusive. (3) Model CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes, serial numbers 5001 through 5194 inclusive, 5301 through 5665 inclusive, 5701 through 5988 inclusive, 6050 through 6119 inclusive, 6158, 6161, 6176, and 6181.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
This paragraph restates the requirements of paragraph (g) of AD 2020-19-13, with revised figure reference and revised service information. For airplanes with a serial number listed in Section 1.A. of the applicable Bombardier service information specified in figure 1 to paragraph (g) of this AD, except airplane S/Ns 6158, 6161, 6176, and 6181: Within 60 months after November 3, 2020 (the effective date of AD 2020-19-13), check each portable oxygen bottle installation to determine the manufacturer and P/N, in accordance with paragraph 2.B. of the Accomplishment Instructions of the applicable Bombardier service information specified in figure 1 to paragraph (g) of this AD. Figure 1 to Paragraph (g)—Service Information References ER28MY25.000
Unsafe condition
This AD was prompted by a report indicating that the portable oxygen bottle installation's upper bracket latch assembly can catch on the pressure gauge tube or on the pressure gauge bezel of the portable oxygen bottle. This AD was also prompted by the determination that four additional Model CL-600-2B16 airplanes may be subject to the unsafe condition. The FAA is issuing this AD to address the unsafe condition, which, if not addressed, could prevent fast and easy access to the portable oxygen bottle in an emergency situation.
Affected ADs
This AD replaces AD 2020-19-13, Amendment 39-21256 (85 FR 60887, September 29, 2020) (AD 2020-19-13).
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