[Federal Register Volume 88, Number 241 (Monday, December 18, 2023)]
[Rules and Regulations]
[Pages 87334-87336]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-27679]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-1505; Project Identifier MCAI-2023-00246-T; 
Amendment 39-22622; AD 2023-24-05]
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 adopting a new airworthiness directive (AD) for 
certain Bombardier, Inc., Model CL-600-2B16 (604 Variant) airplanes. 
This AD was prompted by sleeve loops on some passenger oxygen mask 
lanyards that had improper crimping and unsealed ends. This AD requires 
an inspection of the passenger oxygen mask lanyards and replacement of 
defective oxygen mask lanyards. This AD also prohibits the installation 
of affected parts. The FAA is issuing this AD to address the unsafe 
condition on these products.

DATES: This AD is effective January 22, 2024.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of January 22, 
2024.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2023-1505; 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:
     For service information identified in this final rule, 
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.
     You may view this service information 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-2023-1505.

FOR FURTHER INFORMATION CONTACT: Gabriel Kim, Aviation Safety Engineer, 
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-
228-7300; email [email protected].

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply to certain Bombardier, 
Inc., Model CL-600-2B16 (604 Variant) airplanes. The NPRM published in 
the Federal Register on July 25, 2023 (88 FR 47827). The NPRM was 
prompted by AD CF-2023-06, dated February 9, 2023 (referred to after 
this as the MCAI), issued by Transport Canada, which is the aviation 
authority for Canada. The MCAI states the sleeve loops on certain 
passenger oxygen mask lanyards were found to have improper crimping and 
unsealed ends.
    In the NPRM, the FAA proposed to require an inspection of the 
passenger oxygen mask lanyards and replacement of defective oxygen mask 
lanyards. In the NPRM, the FAA also proposed to prohibit the 
installation of affected parts. The FAA is issuing this AD to address 
these defective oxygen mask lanyards, which could result in no oxygen 
flow to the mask during an emergency.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2023-1505.

Discussion of Final Airworthiness Directive

Comments

    The FAA received a comment from Bombardier. The following presents 
the comment received on the NPRM and the FAA's response to the comment.

Request for Removal of Certain Variants

    Bombardier requested that the proposed AD be revised to remove 
reference to 601-3A and 601-3R Variants. The commenter stated that the 
proposed AD only applies to Model CL-600-2B16 (604 Variant) airplanes 
(Challenger 605 designation). Bombardier noted that the airplane serial 
numbers given in Bombardier Service Bulletin 605-35-008, dated October 
28, 2022, and referenced in Transport Canada AD CF-2023-06, are all 
Model CL-600-2B16 (604 Variant) airplanes.
    The FAA agrees for the reasons provided. The FAA revised the 
Summary, Background, and paragraph (c) of this AD accordingly.

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, considered the 
comments received, 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, and any other changes described previously, this AD is adopted 
as proposed in the NPRM. None of the changes will increase the economic 
burden on any operator.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Bombardier Service Bulletin 605-35-008, dated 
October 28, 2022. This service information specifies procedures for a 
visual inspection of the existing passenger oxygen mask lanyards 
installed in the cabin or lavatory oxygen box assemblies, and 
replacement of the defective oxygen mask lanyards. The

[[Page 87335]]

defective oxygen mask lanyards had improperly crimped sleeve loops and 
unsealed ends.
    This service information 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 120 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Inspection............................  1 work-hour x $85 per                 $0             $85         $10,200
                                         hour = $85.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary on-
condition action that would be required based on the results of any 
required actions. The FAA has no way of determining the number of 
aircraft that might need this on-condition action:

                                     Estimated Costs of On-Condition Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                   Action                                 Labor cost                Parts cost        product
----------------------------------------------------------------------------------------------------------------
Replacement................................  2 work-hours x $85 per hour = $170.          $1,149          $1,319
----------------------------------------------------------------------------------------------------------------

    The FAA has included all known costs in its cost estimate. 
According to the manufacturer, however, some or all costs of this AD 
may be covered under warranty, thereby reducing the cost impact on 
affected operators.

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 adding the following new airworthiness 
directive:

2023-24-05 Bombardier, Inc.: Amendment 39-22622; Docket No. FAA-
2023-1505; Project Identifier MCAI-2023-00246-T.

(a) Effective Date

    This airworthiness directive (AD) is effective January 22, 2024.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc., Model CL-600-2B16 (604 
Variant) airplanes, certificated in any category, serial numbers 
identified in Bombardier Service Bulletin 605-35-008, dated October 
28, 2022.

(d) Subject

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

(e) Unsafe Condition

    This AD was prompted by sleeve loops on some passenger oxygen 
mask lanyards that had improper crimping and unsealed ends. The FAA 
is issuing this AD to address the defective oxygen mask lanyards. 
The unsafe condition, if not addressed, could result in no oxygen 
flow to the mask during an emergency.

(f) Compliance

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

(g) Inspection of the Passenger Oxygen Mask Assemblies

    Within 48 months from the effective date of this AD, visually 
inspect the passenger oxygen mask lanyards in the cabin or lavatory 
oxygen box assemblies as applicable for crimped lanyards and sealed 
ends, in accordance with paragraph 2.C. of the Accomplishment 
Instructions of Bombardier Service Bulletin 605-35-008, dated 
October 28, 2022.
    (1) If all passenger oxygen mask lanyards are crimped and the 
lanyard ends are sealed: No further action is required by this 
paragraph.
    (2) If any passenger oxygen mask lanyard is not crimped 
properly, or any lanyard end is not sealed properly: Before further 
flight, replace the passenger oxygen mask lanyard in accordance with 
Section 2.D. of the Accomplishment Instructions of Bombardier

[[Page 87336]]

Service Bulletin 605-35-008, dated October 28, 2022.

(h) Parts Installation Prohibition

    As of the effective date of this AD, no person may install, on 
any airplane, a passenger oxygen mask lanyard assembly provided with 
an oxygen box lanyard kit containing a lot number in paragraph 
(h)(1) or (2) of this AD.
    (1) Oxygen box lanyard kit part number (P/N) CDKC29-006-501, lot 
number 2011007411, 2012010412, 2101018703, 2101035167, 2102030139, 
2104003817, or 2105005522.
    (2) Oxygen box lanyard kit P/N CDKC29-006-503, lot number 
2011029525, 2012006900, 2103007412, or 2103029992.

(i) Additional AD Provisions

    The following provisions also apply to this AD:
    (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, 
International Validation Branch, mail it to the address identified 
in paragraph (j)(2) of this AD or email to: [email protected]. If mailing information, also submit information by 
email. 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, Inc.'s 
Transport Canada Design Approval Organization (DAO). If approved by 
the DAO, the approval must include the DAO-authorized signature.

(j) Additional Information

    (1) Refer to Transport Canada AD CF-2023-06, dated February 9, 
2023, for related information. This Transport Canada AD may be found 
in the AD docket at regulations.gov under Docket No. FAA-2023-1505.
    (2) For more information about this AD, contact Gabriel Kim, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; email [email protected].

(k) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless this AD specifies otherwise.
    (i) Bombardier Service Bulletin 605-35-008, dated October 28, 
2022.
    (ii) [Reserved]
    (3) For service information 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 service information 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].

    Issued on November 29, 2023.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2023-27679 Filed 12-15-23; 8:45 am]
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