Airworthiness Directives; Bombardier, Inc., Airplanes

[Federal Register Volume 90, Number 101 (Wednesday, May 28, 2025)]
[Rules and Regulations]
[Pages 22450-22453]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-09507]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-2717; Project Identifier MCAI-2024-00147-T; 
Amendment 39-23011; AD 2025-07-09]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2020-19-
13, which applied to certain Bombardier, Inc., Model CL-600-1A11 (600), 
CL-600-2A12 (601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) 
airplanes. AD 2020-19-13 required a check to identify the manufacturer 
and part number of the portable oxygen bottle installation, and, if 
necessary, modification of the portable oxygen bottle installation. 
This AD continues to require the actions specified in AD 2020-19-13 and 
expands the applicability. 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 additional airplanes may be subject to the unsafe 
condition. The FAA is issuing this AD to address the unsafe condition 
on these products.

DATES: This AD is effective July 2, 2025.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of July 2, 2025.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2024-2717; or in person at Docket Operations between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD 
docket contains this final rule, the mandatory continuing airworthiness 
information (MCAI), any comments received, and other information. The 
address for Docket Operations is U.S. Department of Transportation, 
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 
New Jersey Avenue SE, Washington, DC 20590.
    Material Incorporated by Reference:
    <bullet> For Bombardier material identified in this AD, contact 
Bombardier Business Aircraft Customer Response Center, 400 C[ocirc]te-
Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; telephone 514-
855-2999; email bombardier.com">ac.yul@aero.bombardier.com; website bombardier.com.
    <bullet> You may view this material at the FAA, Airworthiness 
Products Section, Operational Safety Branch, 2200 South 216th St., Des 
Moines, WA. For information on the availability of this material at the 
FAA, call 206-231-3195. It is also available at regulations.gov under 
Docket No. FAA-2024-2717.

FOR FURTHER INFORMATION CONTACT: Brenda Buitrago, Aviation Safety 
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
telephone 516-228-7300; email n.

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 to supersede AD 2020-19-13, Amendment 39-21256 (85 FR 
60887, dated September 29, 2020) (AD 2020-19-13). AD 2020-19-13 applied 
to certain Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12 
(601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. AD 
2020-19-13 required a check to identify the manufacturer and part 
number of the portable oxygen bottle installation, and, if necessary, 
modification of the portable oxygen bottle installation. The FAA issued 
AD 2020-19-13 to address the portable oxygen bottle installation's 
upper bracket latch assembly catching on the pressure gauge bezel of 
the portable oxygen bottle, which could prevent fast and easy access to 
the portable oxygen bottle in an emergency situation.
    The NPRM published in the Federal Register on December 31, 2024 (89 
FR 107069). The NPRM was prompted by AD CF-2024-09, dated February 29, 
2024, issued by Transport Canada, which is the aviation authority for 
Canada (Transport Canada AD CF-2024-09) (also referred to as the MCAI). 
The MCAI states four Model CL-600-2B16 airplanes have been added to the 
applicability.
    In the NPRM, the FAA proposed to continue to require the actions 
specified in AD 2020-19-13. In the NPRM, the FAA also proposed to add 
airplanes to the applicability. The FAA is issuing this AD to address 
the unsafe condition on these products.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2024-2717.

Discussion of Final Airworthiness Directive

Comments

    The FAA received no comments on the NPRM or on the determination of 
the cost to the public.

Conclusion

    This product has been approved by the aviation authority of another 
country and is approved for operation in the United States. Pursuant to 
the FAA's bilateral agreement with this State of Design Authority, it 
has notified the FAA of the unsafe condition described in the MCAI 
referenced above. The FAA reviewed the relevant data and determined 
that air safety requires adopting this AD as proposed. Accordingly, the 
FAA is issuing this AD to address the unsafe condition on this product. 
Except for minor editorial changes, this AD is adopted as proposed in 
the NPRM. None of the changes will increase the economic burden on any 
operator.

Material Incorporated by Reference Under 1 CFR Part 51

    The FAA reviewed the following material:
    <bullet> Bombardier Service Bulletin 600-0772, Revision 01, dated 
June 28, 2023;

[[Page 22451]]

    <bullet> Bombardier Service Bulletin 601-0646, Revision 01, dated 
June 28, 2023;
    <bullet> Bombardier Service Bulletin 604-35-006, Revision 01, dated 
June 28, 2023;
    <bullet> Bombardier Service Bulletin 605-35-005, Revision 01, dated 
June 28, 2023; and
    <bullet> Bombardier Service Bulletin 650-35-001, Revision 01, dated 
June 28, 2023.
    This material specifies procedures for a check to identify the 
manufacturer and part number of the portable oxygen bottle 
installation, and, if necessary, modification of the portable oxygen 
bottle installation. These documents are distinct since they apply to 
different airplane models/configurations.
    This material is reasonably available because the interested 
parties have access to it through their normal course of business or by 
the means identified in the ADDRESSES section.

Costs of Compliance

    The FAA estimates that this AD affects 192 airplanes of U.S. 
registry.

                                      Estimated Costs for Required Actions
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                  Labor cost                        Parts cost       Cost per product    Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
3 work-hours x $85 per hour = $255............             $1,530              $1,785                  $342,720
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Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. Subtitle VII: Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    The FAA is issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701: General requirements. 
Under that section, Congress charges the FAA with promoting safe flight 
of civil aircraft in air commerce by prescribing regulations for 
practices, methods, and procedures the Administrator finds necessary 
for safety in air commerce. This regulation is within the scope of that 
authority because it addresses an unsafe condition that is likely to 
exist or develop on products identified in this rulemaking action.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will not have a substantial direct effect on the States, 
on the relationship between the national government and the States, or 
on the distribution of power and responsibilities among the various 
levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Will not affect intrastate aviation in Alaska, and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by:
0
a. Removing Airworthiness Directive (AD) 2020-19-13, Amendment 39-21256 
(85 FR 60887, September 29, 2020); and
0
b. Adding the following new AD:

2025-07-09 Bombardier, Inc.: Amendment 39-23011; Docket No. FAA-
2024-2717; Project Identifier MCAI-2024-00147-T.

(a) Effective Date

    This airworthiness directive (AD) is effective July 2, 2025.

(b) Affected ADs

    This AD replaces AD 2020-19-13, Amendment 39-21256 (85 FR 60887, 
September 29, 2020) (AD 2020-19-13).

(c) Applicability

    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.

(d) Subject

    Air Transport Association (ATA) of America Code 35, Oxygen.

(e) 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.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Retained Check for Airplanes, With Revised Figure Reference and 
Revised Service Information

    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

[[Page 22452]]

[GRAPHIC] [TIFF OMITTED] TR28MY25.000

(h) Retained Bracket Modification, With Specified Compliance Time

    This paragraph restates the requirements of paragraph (h) of AD 
2020-19-13, with a specified compliance time. If, during the 
inspection specified in paragraph (g) of this AD, any portable 
oxygen bottle is found to be manufactured by Scott (Avox/Zodiac) and 
is a 5500 or 5600 series 11 cubic foot bottle, with upper bracket P/
N 36758-02, 36758-12, or H3-2091-1 installed at the neck of the 
bottle: Within 60 months after November 3, 2020 (the effective date 
of AD 2020-19-13), modify the portable oxygen bottle brackets in 
accordance with paragraph 2.C. of the Accomplishment Instructions of 
the applicable Bombardier service information specified in figure 1 
to paragraph (g) of this AD.

(i) Retained Check for Airplanes Not Listed in the Service Information, 
With Revised Figure Reference and Revised Service Information

    This paragraph restates the requirements of paragraph (i) of AD 
2020-19-13, with a revised figure reference and revised service 
information. For airplanes with a serial number that is not listed 
in section 1.A. of the applicable Bombardier service information 
specified in figure 1 to paragraph (g) of this AD, 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 part number and accomplish corrective actions in 
accordance with the procedures specified in paragraph (l)(1) of this 
AD.

(j) New Check Requirement for Added Airplanes

    For airplane S/Ns 6158, 6161, 6176, and 6181: Within 60 months 
after the effective date of this AD, check each portable oxygen 
bottle installation to determine the manufacturer and part number 
and accomplish corrective actions in accordance with the procedures 
specified in paragraph (l)(1) of this AD.

(k) Credit for Previous Actions

    This paragraph provides credit for actions required by 
paragraphs (g) and (h) of this AD, if those actions were performed 
before the effective date of this AD using the applicable material 
specified in paragraphs (k)(1) through (5) of this AD.
    (1) Bombardier Service Bulletin 600-0772, dated June 29, 2018;
    (2) Bombardier Service Bulletin 601-0646, dated June 29, 2018;
    (3) Bombardier Service Bulletin 604-35-006, dated June 29, 2018;
    (4) Bombardier Service Bulletin 605-35-005, dated June 29, 2018; 
and
    (5) Bombardier Service Bulletin 650-35-001, dated June 29, 2018.

(l) Additional AD Provisions

    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Validation Branch, FAA, has the authority to approve 
AMOCs for this AD, if requested using the procedures found in 14 CFR 
39.19. In accordance with 14 CFR 39.19, send your request to your 
principal inspector or responsible Flight Standards Office, as 
appropriate. If sending information directly to the manager of the 
International Validation Branch, mail it to the address identified 
in paragraph (m)(1) of this AD. Information may be emailed to: 
[email protected]. Before using any approved AMOC, notify your 
appropriate principal inspector, or lacking a principal inspector, 
the manager of the responsible Flight Standards Office.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, International 
Validation Branch, FAA; or Transport Canada; or Bombardier's 
Transport Canada Design Approval Organization (DAO). If approved by 
the DAO, the approval must include the DAO-authorized signature.

(m) Additional Information

    (1) For more information about this AD, contact Brenda Buitrago, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; email [email protected].
    (2) Material identified in this AD that is not incorporated by 
reference is available at the address specified in paragraph (n)(3) 
of this AD.

(n) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the material listed in this 
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this material as applicable to do the actions 
required by this AD, unless this AD specifies otherwise.
    (i) Bombardier Service Bulletin 600-0772, Revision 01, dated 
June 28, 2023.
    (ii) Bombardier Service Bulletin 601-0646, Revision 01, dated 
June 28, 2023.
    (iii) Bombardier Service Bulletin 604-35-006, Revision 01, dated 
June 28, 2023.
    (iv) Bombardier Service Bulletin 605-35-005, Revision 01, dated 
June 28, 2023.
    (v) Bombardier Service Bulletin 650-35-001, Revision 01, dated 
June 28, 2023.
    (3) For Bombardier material identified in this AD, contact 
Bombardier Business Aircraft Customer Response Center, 400 
C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; 
telephone 514-855-2999; email bombardier.com">ac.yul@aero.bombardier.com; website 
bombardier.com.
    (4) You may view this material at the FAA, Airworthiness 
Products Section, Operational Safety Branch, 2200 South 216th St., 
Des Moines, WA. For information on the availability of this material 
at the FAA, call 206-231-3195.
    (5) You may view this material at the National Archives and 
Records Administration (NARA). For information on the availability 
of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email [email protected].


[[Page 22453]]


    Issued on April 3, 2025.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2025-09507 Filed 5-27-25; 8:45 am]
BILLING CODE 4910-13-P

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