[Federal Register Volume 88, Number 38 (Monday, February 27, 2023)]
[Proposed Rules]
[Pages 12276-12281]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-03636]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-0169; Project Identifier MCAI-2022-00462-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 adopt a new airworthiness directive (AD) 
for certain Bombardier, Inc., Model BD-700-1A10, and BD-700-1A11 
airplanes. This proposed AD was prompted by a determination that new or 
more restrictive airworthiness limitations are necessary. This proposed 
AD would require revising the existing maintenance or inspection 
program, as applicable, to incorporate more restrictive airworthiness 
limitations. 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 April 13, 
2023.

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-2023-0169; 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 service information identified in this 
NPRM, 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.

FOR FURTHER INFORMATION CONTACT: Gabriel Kim, Aerospace Engineer, 
Mechanical Systems and Administrative Services Section, FAA, New York 
ACO Branch, 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 
arguments about this proposal. Send your comments to an address listed 
under ADDRESSES. Include ``Docket No. FAA-2023-0169; Project Identifier 
MCAI-2022-00462-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 
Gabriel Kim, Aerospace Engineer, Mechanical Systems and Administrative 
Services Section, FAA, New York ACO Branch, 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

    Transport Canada, which is the aviation authority for Canada, has 
issued Transport Canada AD CF-2022-15, dated April 7, 2022 (Transport 
Canada AD CF-2022-15) (also referred to after this as the MCAI), to 
correct an unsafe condition on certain Bombardier, Inc., Model BD-700-
1A10, and BD-700-1A11 airplanes. The MCAI states that during a design 
review, it was discovered that three candidate certification 
maintenance requirements (CCMRs) which were dispositioned as 
maintenance review board report (MRBR) tasks had reached or exceeded 
the limit for escalation and that exceeding the CCMR limitations could 
result in unsafe conditions. The MCAI also states that Bombardier 
issued

[[Page 12277]]

certification maintenance requirements (CMRs) to prevent escalation and 
reduce the interval, as applicable, for these tasks, which consist of a 
functional test of the landing-gear emergency extension; an operational 
test of the brake shutoff valve; and a visual check of the passenger-
door vent-flap mechanism.
    The FAA is proposing this AD to address the following unsafe 
conditions:
     Dormant failure of the landing gear emergency extension 
system, which could lead to failure to extend the landing gear when 
normal gear extension has failed. This unsafe condition, if not 
addressed, could result in an annunciated failure to extend both main 
landing gears or all landing gears.
     Dormant failure of the brake shut off valve in the open 
state. This unsafe condition, if not addressed, could result in 
uncommanded braking during take-off.
     Dormant failure of the vent flap assembly where it fails 
in the closed position, which could result in the failure to prevent 
the initiation of cabin pressurization when the passenger door is not 
fully closed, latched and locked. This unsafe condition, if not 
addressed, could result in the passenger door opening under pressure on 
ground or during flight.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2023-0169.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed the following airplane maintenance manual (AMM) 
tasks from Bombardier.
     Tasks 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension;'' 32-43-25-101, ``Operational Test of the Brake 
Shutoff Valve;'' and 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism;'' of Part 2, ``Airworthiness Limitations,'' of the 
Bombardier Global Express Time Limits/Maintenance Checks (TLMC), 
Publication No. BD-700 TLMC, Revision 34, dated March 1, 2022. (For 
obtaining the tasks for Bombardier Global Express TLMC, Publication No. 
BD-700 TLMC, use Document Identification No. GL 700 TLMC.)
     Tasks 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension;'' 32-43-25-101, ``Operational Test of the Brake 
Shutoff Valve;'' and 52-11-00-101, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism;'' of Part 2, ``Airworthiness Limitations,'' of the 
Bombardier Global Express XRS TLMC, Publication No. BD-700 XRS TLMC, 
Revision 21, dated March 1, 2022. (For obtaining the tasks for 
Bombardier Global Express XRS TLMC, Publication No. BD-700 XRS TLMC, 
use Document Identification No. GL XRS TLMC.)
     Tasks 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension;'' 32-43-25-101, ``Operational Test of the Brake 
Shutoff Valve;'' and 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism;'' of Part 2, ``Airworthiness Limitations,'' of the 
Bombardier Global 5000 TLMC, Publication No. BD-700 TLMC, Revision 25, 
dated March 1, 2022. (For obtaining the tasks for Bombardier Global 
5000 TLMC, Publication No. BD-700 TLMC, use Document Identification No. 
GL 5000 TLMC.)
     Tasks 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension;'' 32-43-25-101, ``Operational Test of the Brake 
Shutoff Valve;'' and 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism;'' of Part 2, ``Airworthiness Limitations,'' of the 
Bombardier Global 5000 Featuring Global Vision Flight Deck (GVFD) TLMC, 
Publication No. GL 5000 GVFD TLMC, Revision 15, dated March 1, 2022. 
(For obtaining the tasks for Bombardier Global 5000 Featuring GVFD 
TLMC, Publication No. GL 5000 GVFD TLMC, use Document Identification 
No. GL 5000 GVFD TLMC.)
     Tasks 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension;'' 32-43-25-101, ``Operational Test of the Brake 
Shutoff Valve;'' and 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism;'' of Part 2, ``Airworthiness Limitations,'' of the 
Bombardier Global 6000 TLMC, Publication No. GL 6000 TLMC, Revision 15, 
dated March 1, 2022. (For obtaining the tasks for Bombardier Global 
6000 TLMC, Publication No. GL 6000 TLMC, use Document Identification 
No. GL 6000 TLMC.)
    This service information specifies more restrictive airworthiness 
limitations for CMRs. These documents are distinct since they apply to 
different airplane models in different configurations.
    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.

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 service information described 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 require revising the existing maintenance or 
inspection program as applicable to incorporate more restrictive 
airworthiness limitations.
    This proposed AD would require revisions to certain operator 
maintenance documents to include new actions (e.g., inspections). 
Compliance with these actions is required by 14 CFR 91.403(c). For 
airplanes that have been previously modified, altered, or repaired in 
the areas addressed by this proposed AD, the operator may not be able 
to accomplish the actions described in the revisions. In this 
situation, to comply with 14 CFR 91.403(c), the operator must request 
approval for an alternative method of compliance according to paragraph 
(i)(1) of this proposed AD.

Differences Between This NPRM and the MCAI

    Where Transport Canada AD CF-2022-15 references associated MRBRs 
tasks, Figure 1 to paragraph (g) of this proposed AD references AMM 
tasks instead. The FAA has determined that CCMRs cannot be mandated by 
the FAA. However, equivalent AMM tasks may be mandated in lieu of 
CCMRs.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 413 airplanes of U.S. registry. The FAA estimates the following 
costs to comply with this proposed AD:
    The FAA has determined that revising the maintenance or inspection 
program takes an average of 90 work-hours per operator, although the 
agency recognizes that this number may vary from operator to operator. 
Since operators incorporate maintenance or inspection program changes 
for their affected fleet(s), the FAA has determined that a per-operator 
estimate is more accurate than a per-airplane estimate. Therefore, the 
agency estimates the average total cost per operator to be $7,650 (90 
work-hours x $85 per work-hour).

[[Page 12278]]

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 adding the following new airworthiness 
directive:

Bombardier, Inc.: Docket No. FAA-2023-0169; Project Identifier MCAI-
2022-00462-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by April 13, 2023.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-
700-1A11 airplanes, certificated in any category, having serial 
numbers 9002 through 9860 inclusive, 9862 through 9871 inclusive, 
9873 through 9879 inclusive, 60005, 60024, 60030, 60032, 60037, 
60043, 60045, 60049, 60056, 60057, 60061 and 60068.

 (d) Subject

    Air Transport Association (ATA) of America Code 05, Time Limits/
Maintenance Checks.

 (e) Unsafe Condition

    This AD was prompted by a determination that more restrictive 
airworthiness limitations are necessary. The FAA is issuing this AD 
to address the unsafe conditions identified in paragraphs (e)(1) 
through (3) of this AD.
    (1) Dormant failure of the landing gear emergency extension 
system, which could lead to failure to extend the landing gear when 
normal gear extension has failed. This unsafe condition, if not 
addressed, could result in an annunciated failure to extend both 
main landing gears or all landing gears.
    (2) Dormant failure of the brake shut off valve in the open 
state. This unsafe condition, if not addressed, could result in 
uncommanded braking during take-off.
    (3) Dormant failure of the vent flap assembly where it fails in 
the closed position, which could result in the failure to prevent 
the initiation of cabin pressurization when the passenger door is 
not fully closed, latched and locked. This unsafe condition, if not 
addressed, could result in the passenger door opening under pressure 
on ground or during flight.

 (f) Compliance

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

 (g) Maintenance or Inspection Program Revision

    Within 30 days from the effective date of this AD, revise the 
existing maintenance or inspection program, as applicable, to 
incorporate the information specified in the certification 
maintenance requirements (CMR) tasks identified in Figure 1 to 
paragraph (g) of this AD of Part 2, ``Airworthiness Limitations,'' 
of the applicable Time Limits/Maintenance Checks (TLMC) manuals 
identified in Figure 2 to paragraph (g) of this AD. The initial 
compliance time for doing the tasks is at the applicable time 
specified in Figure 1 to paragraph (g) of this AD, or within 30 days 
after the effective date of this AD, whichever occurs later.

[[Page 12279]]

Figure 1 to paragraph (g)--New CMR Tasks
[GRAPHIC] [TIFF OMITTED] TP27FE23.000


[[Page 12280]]



Figure 2 to paragraph (g)--Applicable TLMCs
[GRAPHIC] [TIFF OMITTED] TP27FE23.001

 (h) No Alternative Actions or Intervals

    After the existing maintenance or inspection program has been 
revised as required by paragraph (g) of this AD, no alternative 
actions (e.g., inspections) or intervals may be used unless the 
actions or intervals are approved as an alternative method of 
compliance (AMOC) in accordance with the procedures specified in 
paragraph (i)(1) of this AD.

 (i) Additional AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York ACO 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 New York ACO 
Branch, mail it to ATTN: Program Manager, Continuing Operational 
Safety, at the address

[[Page 12281]]

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, New York ACO 
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-2022-15, dated April 7, 
2022, for related information. This Transport Canada AD may be found 
in the AD docket at regulations.gov under Docket No. FAA-2023-0169.
    (2) For more information about this AD, contact Gabriel Kim, 
Aerospace Engineer, Mechanical Systems and Administrative Services 
Section, FAA, New York ACO Branch, 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) Task 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global Express Time Limit/Maintenance Check manual 
(TLMC), Publication No. BD-700 TLMC, Revision 34, dated March 1, 
2022.
    Note 1 to paragraph (k)(2)(i): For obtaining the tasks specified 
in paragraphs (k)(2)(i) through (iii) of this AD for Bombardier 
Global Express TLMC, Publication No. BD-700 TLMC, Revision 34, dated 
March 1, 2022, use Document Identification No. GL 700 TLMC.
    (ii) Task 32-43-25-101, ``Operational Test of the Brake Shutoff 
Valve,'' of Part 2, ``Airworthiness Limitations,'' of the Bombardier 
Global Express TLMC, Publication No. BD-700 TLMC, Revision 34, dated 
March 1, 2022.
    (iii) Task 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global Express TLMC, Publication No. BD-700 TLMC, 
Revision 34, dated March 1, 2022.
    (iv) Task 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global Express XRS TLMC, Publication No. BD-700 XRS 
TLMC, Revision 21, dated March 1, 2022.
    Note 2 to paragraph (k)(2)(iv): For obtaining the tasks 
specified in paragraphs (k)(2)(iv) through (vi) of this AD for 
Bombardier Global Express XRS TLMC, Publication No. BD-700 XRS TLMC, 
use Document Identification No. GL XRS TLMC.
    (v) Task 32-43-25-101, ``Operational Test of the Brake Shutoff 
Valve,'' of Part 2, ``Airworthiness Limitations,'' of the Bombardier 
Global Express XRS TLMC, Publication No. BD-700 XRS TLMC, Revision 
21, dated March 1, 2022.
    (vi) Task 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global Express XRS TLMC, Publication No. BD-700 XRS 
TLMC, Revision 21, dated March 1, 2022.
    (vii) Task 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global 5000 TLMC, Publication No. BD-700 TLMC, 
Revision 25, dated March 1, 2022.
    Note 3 to paragraph (k)(2)(vii): For obtaining the tasks 
specified in paragraphs (k)(2)(vii) through (ix) of this AD for 
Bombardier Global 5000 TLMC, Publication No. BD-700 TLMC, use 
Document Identification No. GL 5000 TLMC.
    (viii) Task 32-43-25-101, ``Operational Test of the Brake 
Shutoff Valve,'' of Part 2, ``Airworthiness Limitations,'' of the 
Bombardier Global 5000 TLMC, Publication No. BD-700 TLMC, Revision 
25, dated March 1, 2022.
    (ix) Task 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global 5000 TLMC, Publication No. BD-700 TLMC, 
Revision 25, dated March 1, 2022.
    (x) Task 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global 5000 Featuring Global Vision Flight Deck 
(GVFD) TLMC, Publication No. GL 5000 GVFD TLMC, Revision 15, dated 
March 1, 2022.
    Note 4 to paragraph (k)(2)(x): For obtaining the tasks specified 
in paragraphs (k)(2)(x) through (xii) of this AD for Bombardier 
Global 5000 Featuring GVFD TLMC, Publication No. GL 5000 GVFD TLMC, 
use Document Identification No. GL 5000 GVFD TLMC.
    (xi) Task 32-43-25-101, ``Operational Test of the Brake Shutoff 
Valve,'' of Part 2, ``Airworthiness Limitations,'' of the Bombardier 
Global 5000 Featuring GVFD TLMC, Publication No. GL 5000 GVFD TLMC, 
Revision 15, dated March 1, 2022.
    (xii) Task 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global 5000 Featuring GVFD, Publication No. GL 5000 
GVFD TLMC, Revision 15, dated March 1, 2022.
    (xiii) Task 32-34-00-101, ``Functional Test of the Landing-Gear 
Emergency Extension,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global 6000 TLMC, Publication No. GL 6000 TLMC, 
Revision 15, dated March 1, 2022.
    Note 5 to paragraph (k)(2)(xiii): For obtaining the tasks 
specified in paragraphs (xiii) through (xv) of this AD for 
Bombardier Global 6000 TLMC, Publication No. GL 6000 TLMC, use 
Document Identification No. GL 6000 TLMC.
    (xiv) Task 32-43-25-101, ``Operational Test of the Brake Shutoff 
Valve,'' of Part 2, ``Airworthiness Limitations,'' of the Bombardier 
Global 6000 TLMC, Publication No. GL 6000 TLMC, Revision 15, dated 
March 1, 2022.
    (xv) Task 52-11-00-106, ``Visual Check of the Passenger-Door 
Vent-Flap Mechanism,'' of Part 2, ``Airworthiness Limitations,'' of 
the Bombardier Global 6000 TLMC, Publication No. GL 6000 TLMC, 
Revision 15, dated March 1, 2022.
    (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 service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, email [email protected], or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on February 15, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2023-03636 Filed 2-24-23; 8:45 am]
BILLING CODE 4910-13-P