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[Federal Register Volume 89, Number 250 (Tuesday, December 31, 2024)]
[Proposed Rules]
[Pages 107069-107072]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-31379]

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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]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2020-19-13, which applies 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 requires 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. Since the FAA issued AD 2020-19-13, it was 
determined that four additional airplanes are subject to the unsafe 
condition. This proposed AD would continue to require the actions 
specified in AD 2020-19-13 and would expand the applicability. The FAA 
is proposing this AD to address the unsafe condition on these products.

DATES: The FAA must receive comments on this proposed AD by February 
14, 2025.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to regulations.gov. Follow 
the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    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 NPRM, the mandatory continuing airworthiness 
information (MCAI), any comments received, and other information. The 
street address for Docket Operations is listed above.
    Material Incorporated by Reference:
     For Bombardier material identified in this proposed 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.
     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.

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

SUPPLEMENTARY INFORMATION:

Comments Invited

    The FAA invites you to send any written relevant data, views, or

[[Page 107070]]

arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2024-2717; 
Project Identifier MCAI-2024-00147-T'' at the beginning of your 
comments. The most helpful comments reference a specific portion of the 
proposal, explain the reason for any recommended change, and include 
supporting data. The FAA will consider all comments received by the 
closing date and may amend the proposal because of those comments.
    Except for Confidential Business Information (CBI) as described in 
the following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
regulations.gov, including any personal information you provide. The 
agency will also post a report summarizing each substantive verbal 
contact received about this NPRM.

Confidential Business Information

    CBI is commercial or financial information that is both customarily 
and actually treated as private by its owner. Under the Freedom of 
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public 
disclosure. If your comments responsive to this NPRM contain commercial 
or financial information that is customarily treated as private, that 
you actually treat as private, and that is relevant or responsive to 
this NPRM, it is important that you clearly designate the submitted 
comments as CBI. Please mark each page of your submission containing 
CBI as ``PROPIN.'' The FAA will treat such marked submissions as 
confidential under the FOIA, and they will not be placed in the public 
docket of this NPRM. Submissions containing CBI should be sent to 
Brenda Buitrago, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, 
Suite 410, Westbury, NY 11590; telephone 516-228-7300; email [email protected]. Any commentary that the FAA receives which is not 
specifically designated as CBI will be placed in the public docket for 
this rulemaking.

Background

    The FAA issued AD 2020-19-13, Amendment 39-21256 (85 FR 60887, 
dated September 29, 2020) (AD 2020-19-13), for 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 was prompted by 
MCAI originated by Transport Canada, which is the aviation authority 
for Canada. Transport Canada issued AD CF-2019-26, dated July 9, 2019 
(Transport Canada AD CF-2019-26), to correct an unsafe condition.
    AD 2020-19-13 requires 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.

Actions Since AD 2020-19-13 Was Issued

    Since the FAA issued AD 2020-19-13, Transport Canada superseded AD 
CF-2019-26, dated July 19, 2019, and issued Transport Canada AD CF-
2024-09, dated March 14, 2024 (Transport Canada AD CF-2024-09) 
(referred to after this as the MCAI) to correct an unsafe condition on 
certain Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12 (601), 
and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. The MCAI 
states four Model CL-600-2B16 airplanes have been added to the 
applicability.
    This proposed AD would add airplanes to the applicability. The FAA 
is proposing this AD to address the portable oxygen bottle 
installation's upper bracket latch assembly catching on the pressure 
gauge tube or on the pressure gauge bezel of the portable oxygen 
bottle, which, if not detected and corrected, could prevent fast and 
easy access to the portable oxygen bottle in an emergency situation.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2024-2717.

Related Material Under 1 CFR Part 51

    The FAA reviewed the following material:
     Bombardier Service Bulletin 600-0772, Revision 01, dated 
June 28, 2023;
     Bombardier Service Bulletin 601-0646, Revision 01, dated 
June 28, 2023;
     Bombardier Service Bulletin 604-35-006, Revision 01, dated 
June 28, 2023;
     Bombardier Service Bulletin 605-35-005, Revision 01, dated 
June 28, 2023; and
     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.

FAA's Determination

    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 and 
material referenced above. The FAA is issuing this NPRM after 
determining that the unsafe condition described previously is likely to 
exist or develop on other products of the same type design.

Proposed AD Requirements in This NPRM

    This proposed AD would retain all requirements of AD 2020-19-13. 
This proposed AD would add airplanes to the applicability. This 
proposed AD would also require accomplishing the actions specified in 
the material described previously.

Clarification of Compliance Time

    Paragraph (h) of AD 2020-19-13 does not include a compliance time 
for the modification. However, as specified in paragraph (g) of AD 
2020-19-13 and this proposed AD, operators have 60 months to determine 
if there is any affected part, and paragraph (h) of the proposed AD 
provides the on-condition action (modification) if an affected part is 
found. Therefore, the replacement in paragraph (h) of this AD, if 
applicable, must also be done within 60 months.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 192 airplanes of U.S. registry.

[[Page 107071]]

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

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

    The FAA determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 this proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Would not affect intrastate aviation in Alaska, and
    (3) Would 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 Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 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:

    Bombardier, Inc.: Docket No. FAA-2024-2717; Project Identifier 
MCAI-2024-00147-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by February 14, 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 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 (S/N) 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
------------------------------------------------------------------------
             Airplane model               Bombardier service information
------------------------------------------------------------------------
Model CL-600-1A11......................  Bombardier Service Bulletin 600-
                                          0772, Revision 01, dated June
                                          28, 2023.
Model CL-600-2A12......................  Bombardier Service Bulletin 601-
                                          0646, Revision 01, dated June
                                          28, 2023.
Model CL-600-2B16......................  Bombardier Service Bulletin 601-
                                          0646, Revision 01, dated June
                                          28, 2023.
Model CL-600-2B16......................  Bombardier Service Bulletin 604-
                                          35-006, Revision 01, dated
                                          June 28, 2023.

[[Page 107072]]

 
Model CL-600-2B16......................  Bombardier Service Bulletin 605-
                                          35-005, Revision 01, dated
                                          June 28, 2023.
Model CL-600-2B16......................  Bombardier Service Bulletin 650-
                                          35-001, Revision 01, dated
                                          June 28, 2023.
------------------------------------------------------------------------

(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. This material 
is not incorporated by reference in 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) 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

    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].

(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.
    (3) The following material was approved for IBR on [DATE 35 DAYS 
AFTER PUBLICATION OF THE FINAL RULE].
    (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.
    (4) 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.
    (5) 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.
    (6) 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/[email protected]">www.archives.gov/federal-register/cfr/[email protected].

    Issued on December 23, 2024.
Steven W. Thompson,
Acting Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2024-31379 Filed 12-30-24; 8:45 am]
BILLING CODE 4910-13-P
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