[Federal Register Volume 89, Number 114 (Wednesday, June 12, 2024)]
[Proposed Rules]
[Pages 49819-49823]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-12745]


 ========================================================================
 Proposed Rules
                                                 Federal Register
 ________________________________________________________________________
 
 This section of the FEDERAL REGISTER contains notices to the public of 
 the proposed issuance of rules and regulations. The purpose of these 
 notices is to give interested persons an opportunity to participate in 
 the rule making prior to the adoption of the final rules.
 
 ========================================================================
 

  Federal Register / Vol. 89, No. 114 / Wednesday, June 12, 2024 / 
Proposed Rules  

[[Page 49819]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-1483; Project Identifier MCAI-2023-01094-T]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2021-10-02, which applies to all Bombardier, Inc., Model BD-700-1A10 
and BD-700-1A11 airplanes. AD 2021-10-02 requires repetitive general 
visual inspections of the left- and right-hand elevator torque tube 
bearings for any sand, dust, or corrosion; repetitive functional tests 
of the elevator control system; and replacement of the elevator torque 
tube bearings if necessary. Since the FAA issued AD 2021-10-02, the FAA 
has determined that a new airworthiness limitation is necessary. This 
proposed AD would continue to require certain actions in AD 2021-10-02 
and require revising the existing maintenance or inspection program, as 
applicable, to incorporate new airworthiness limitations. The FAA is 
proposing this AD to address the unsafe condition on these products.

DATES: The FAA must receive comments on this NPRM by July 29, 2024.

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-2024-1483; 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, 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: Gabriel Kim, 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 
arguments about this proposal. Send your comments to an address listed 
under ADDRESSES. Include ``Docket No. FAA-2024-1483; Project Identifier 
MCAI-2023-01094-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, 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 that is not 
specifically designated as CBI will be placed in the public docket for 
this rulemaking.

Background

    The FAA issued AD 2021-10-02, Amendment 39-21535 (86 FR 33088, June 
24, 2021) (AD 2021-10-02), for all Bombardier, Inc., Model BD-700-1A10 
and BD-700-1A11 airplanes. AD 2021-10-02 was prompted by an MCAI 
originated by Transport Canada, which is the aviation authority for 
Canada. Transport Canada issued AD CF-2020-29, dated August 21, 2020 
(Transport Canada AD CF-2020-29), to correct an unsafe condition.
    AD 2021-10-02 requires repetitive general visual inspections of the 
left- and right-hand elevator torque tube bearings for any sand, dust, 
or corrosion; repetitive functional tests of the elevator control 
system; and replacement of the elevator torque tube bearings if 
necessary. The FAA issued AD 2021-10-02 to address sand contamination 
and corrosion of the elevator torque tube bearings, which could lead to 
binding or seizure of the bearings, and potentially lead to a

[[Page 49820]]

reduction in or loss of airplane pitch control.

Actions Since AD 2021-10-02 Was Issued

    Since the FAA issued AD 2021-10-02, Transport Canada superseded 
Transport Canada CF-2020-29, and issued Transport Canada AD CF-2020-
29R1, dated October 20, 2023 (Transport Canada AD CF-2020-29R1) 
(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 data collected from the reports mandated by 
Transport Canada AD CF-2020-29 was used to validate inspection 
intervals, which have been integrated into new certification 
maintenance requirement (CMR) tasks. The MCAI also states that 
Transport Canada AD CF-2020-29R1 mandates the new CMR tasks while 
giving credit for initial and repetitive inspections already performed, 
revises the applicability to exclude airplanes delivered with the new 
CMRs, and removes the reporting requirement.
    The FAA is proposing this AD to address sand contamination and 
corrosion of the elevator torque tube bearings, which could lead to 
binding or seizure of the bearings, and potentially lead to a reduction 
in or loss of airplane pitch control.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2024-1483.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed the following Bombardier temporary revisions:
     Bombardier Global Express, BD-700 Temporary Revision 5-2-
53, dated March 31, 2023 (for Model BD-700-1A10 airplanes);
     Bombardier Global Express XRS, BD-700 Temporary Revision 
5-2-15, dated March 31, 2023 (for Model BD-700-1A10 airplanes);
     Bombardier Global 6000, GL 6000 Temporary Revision 5-2-20, 
dated March 31, 2023 (for Model BD-700-1A10 airplanes);
     [Bombardier] Global 6500, GL 6500 Temporary Revision 5-2-
3, dated March 31, 2023 (for Model BD-700-1A10 airplanes);
     Bombardier Global 5000, BD-700 Temporary Revision 5-2-21, 
dated March 31, 2023 (for Model BD-700-1A11 airplanes);
     Bombardier Global 5000 GL 5000 Featuring Global Vision 
Flight Deck Temporary Revision 5-2-20, dated March 31, 2023 (for Model 
BD-700-1A11 airplanes); and
     [Bombardier] Global 5500 GL 5500 Temporary Revision, 5-2-
3, dated March 31, 2023 (for Model BD-700-1A11 airplanes).
    This service information specifies airworthiness limitations for 
certification maintenance requirements. These documents are distinct 
since they apply to different airplane models and configurations.
    This proposed AD would also require the following service 
information which the Director of the Federal Register approved for 
incorporation by reference as of July 29, 2021 (86 FR 33088, June 24, 
2021).
     Bombardier Service Bulletin 700-1A11-27-041, Revision 1, 
dated December 7, 2020.
     Bombardier Service Bulletin 700-27-083, Revision 1, dated 
December 7, 2020.
     Bombardier Service Bulletin 700-27-5012, Revision 1, dated 
December 7, 2020.
     Bombardier Service Bulletin 700-27-5503, Revision 1, dated 
December 7, 2020.
     Bombardier Service Bulletin 700-27-6012, Revision 1, dated 
December 7, 2020.
     Bombardier Service Bulletin 700-27-6503, Revision 1, dated 
December 7, 2020.
    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 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 Requirements of This NPRM

    This proposed AD would retain certain requirements of AD 2021-10-
02. This proposed AD would remove airplanes from the applicability, 
remove the reporting requirement, and provide credit for certain 
actions. This proposed AD would also require revising the existing 
maintenance or inspection program, as applicable, to incorporate a new 
airworthiness limitation.
    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 
(l)(1) of this proposed AD.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 461 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).
    The FAA estimates the total cost per operator for the new proposed 
actions to be $7,650 (90 work-hours x $85 per work-hour).

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                 Cost on U.S.
             Action                   Labor cost          Parts cost       Cost per product        operators
----------------------------------------------------------------------------------------------------------------
Retained actions from AD 2021-10- 22 work-hours x     Up to $4 (for four  Up to $1,874......  Up to $863,914.
 02.                               $85 per hour =      cotter pins) *.
                                   $1,870.
----------------------------------------------------------------------------------------------------------------
* Parts cost include replacement parts where necessary.


[[Page 49821]]

    The FAA estimates the following costs to do any necessary on-
condition actions 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
            Labor cost                  Parts cost           product
------------------------------------------------------------------------
5 work-hours x $85 per hour =      $271 (for four                  $696
 $425.                              bearings).
------------------------------------------------------------------------

    The FAA has included all known costs in its cost estimate. 
According to the manufacturer, however, some or all of the costs of 
this proposed 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

    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 2021-10-02, Amendment 39-21535 (86 
FR 33088, June 24, 2021); and
0
b. Adding the following new airworthiness directive:

Bombardier, Inc.: Docket No. FAA-2024-1483; Project Identifier MCAI-
2023-01094-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by July 29, 2024.

(b) Affected ADs

    This AD replaces AD 2021-10-02, Amendment 39-21535 (86 FR 33088, 
June 24, 2021) (AD 2021-10-02).

(c) Applicability

    This AD applies to Bombardier, Inc., Model BD-700-1A10, and -
1A11 airplanes, certificated in any category, having serial number 
9002 through 60081 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 05, Time Limits/
Maintenance Checks; 55, Flight Controls.

(e) Reason

    This AD was prompted by a determination that new airworthiness 
limitations are necessary. The FAA is issuing this AD to address 
sand contamination and corrosion of the elevator torque tube 
bearings, which could lead to binding or seizure of the bearings, 
and potentially lead to a reduction in or loss of airplane pitch 
control.

(f) Compliance

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

(g) Retained Inspection and Corrective Actions, With Change

    This paragraph restates the requirements of paragraph (g) of AD 
2021-10-02, with change to Figure 1 to paragraph (g), which 
identifies the airplane marketing designation instead of the serial 
number range. Within 36 months from July 29, 2021 (the effective 
date of AD 2021-10-02) or within 63 months from the date of airplane 
manufacture, as identified on the identification plate of the 
airplane, whichever occurs later: Do a general visual inspection of 
the left- and right-hand elevator torque tube bearings for any sand, 
dust, or corrosion; perform a functional test of the elevator 
control system; and do all applicable corrective actions; in 
accordance with the Accomplishment Instructions of paragraphs 2.B., 
2.C., and 2.D. of the applicable service information specified in 
figure 1 to paragraph (g) of this AD. Applicable corrective actions 
must be done before further flight. Repeat the general visual 
inspection and functional test thereafter at intervals not to exceed 
63 months. Accomplishing the revision of the existing maintenance or 
inspection program required by paragraph (i) of this AD terminates 
the requirements of this paragraph.

             Figure 1 to Paragraph (g)--Service Information
------------------------------------------------------------------------
                                 With marketing        Use bombardier
         For model--              designation--      service bulletin--
------------------------------------------------------------------------
BD-700-1A10 airplanes.......  Global Express or     700-27-083, Revision
                               Global Express XRS.   1, dated December
                                                     7, 2020.
BD-700-1A10 airplanes.......  Global 6000.........  700-27-6012,
                                                     Revision 1, dated
                                                     December 7, 2020.
BD-700-1A10 airplanes.......  Global 6500.........  700-27-6503,
                                                     Revision 1, dated
                                                     December 7, 2020.
BD-700--1A11 airplanes......  Global 5000.........  700-1A11-27-041,
                                                     Revision 1, dated
                                                     December 7, 2020.

[[Page 49822]]

 
BD-700-1A11 airplanes.......  Global 5000           700-27-5012,
                               Featuring Global      Revision 1, dated
                               Vision Flight Deck    December 7, 2020.
                               (GVFD).
BD-700-1A11 airplanes.......  Global 5500.........  700-27-5503,
                                                     Revision 1, dated
                                                     December 7, 2020.
------------------------------------------------------------------------

(h) No Reporting Requirement

    Although the service information identified in Figure 1 to 
paragraph (g) of this AD specifies to submit certain information to 
the manufacturer, this AD does not include that requirement.

(i) New Revision of the Existing Maintenance or Inspection Program

    Within 30 days after the effective date of this AD, revise the 
existing maintenance or inspection program, as applicable, to 
incorporate the information specified in the applicable temporary 
revision identified in figure 2 to paragraph (i) of this AD. The 
initial compliance time for doing the tasks is at the time specified 
in the applicable temporary revision identified in figure 2 to 
paragraph (i) of this AD, or within 90 days after the effective date 
of this AD, whichever occurs later. Accomplishing the revision of 
the existing maintenance or inspection program required by this 
paragraph terminates the actions required by paragraph (g) of this 
AD.

             Figure 2 to Paragraph (i)--Service Information
------------------------------------------------------------------------
                                                       Use bombardier
         For model--           Using TLMC manual--  temporary revision--
------------------------------------------------------------------------
BD-700-1A10 airplanes.......  Bombardier Global     5-2-53, dated March
                               Express BD-700 TLMC.  31, 2023.
BD-700-1A10 airplanes.......  Bombardier Global     5-2-15, dated March
                               Express XRS, BD-700   31, 2023.
                               TLMC.
BD-700-1A10 airplanes.......  Bombardier Global     5-2-20, dated March
                               6000, GL 6000 TLMC.   31, 2023.
BD-700-1A10.................  Global 6500, GL 6500  5-2-3, dated March
                               TLMC.                 31, 2023.
BD-700-1A11 airplanes.......  Bombardier Global     5-2-21, dated March
                               5000 BD-700 TLMC.     31, 2023.
BD-700-1A11 airplanes.......  Bombardier Global     5-2-20, dated March
                               5000 GL 5000          31, 2023.
                               Featuring Global
                               Vision Flight Deck
                               (GVFD) TLMC.
BD-700-1A11 airplanes.......  Global 5500 GL 5500   5-2-3, dated March
                               TLMC.                 31, 2023.
------------------------------------------------------------------------

(j) New No Alternative Actions or Intervals

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

(k) Credit for Previous Actions

    (1) This paragraph provides credit for actions required by 
paragraph (g) of this AD, if those actions were performed before 
July 29, 2021 (the effective date of AD 2021-10-02) using the 
applicable service information in paragraphs (k)(1)(i) through (vi) 
of this AD, which are not incorporated by reference in this AD.
    (i) Bombardier Service Bulletin 700-1A11-27-041, dated July 23, 
2020.
    (ii) Bombardier Service Bulletin 700-27-083, dated July 23, 
2020.
    (iii) Bombardier Service Bulletin 700-27-5012, dated July 23, 
2020.
    (iv) Bombardier Service Bulletin 700-27-5503, dated July 23, 
2020.
    (v) Bombardier Service Bulletin 700-27-6012, dated July 23, 
2020.
    (vi) Bombardier Service Bulletin 700-27-6503, dated July 23, 
2020.
    (2) This paragraph provides credit for the initial and 
repetitive inspection actions required by paragraph (i) of this AD 
if those actions were performed before the effective date of this AD 
using the applicable service information identified in figure 1 to 
paragraph (g) of this AD, which were incorporated by reference in AD 
2021-10-02, Amendment 39-21535 (86 FR 33088, June 24, 2021).

(l) 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 of the 
International Validation Branch, mail it to the address identified 
in paragraph (m)(1) of this AD. Information may be emailed to: 9-
[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, Inc.'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 Gabriel Kim, 
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; email [email protected].
    (2) Service information identified in this AD that is not 
incorporated by reference is available at the address specified in 
paragraph (n)(5) of this AD.

(n) 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.
    (3) The following service information was approved for IBR on 
[DATE 35 DAYS AFTER PUBLICATION OF THE FINAL RULE].
    (i) Bombardier Global Express, BD-700 Temporary Revision 5-2-53, 
dated March 31, 2023 (for Model BD-700-1A10 airplanes).
    (ii) Bombardier Global Express XRS, BD-700 Temporary Revision 5-
2-15, dated March 31, 2023 (for Model BD-700-1A10 airplanes).
    (iii) Bombardier Global 6000, GL 6000 Temporary Revision 5-2-20, 
dated March 31, 2023 (for Model BD-700-1A10 airplanes).
    (iv) [Bombardier] Global 6500, GL 6500 Temporary Revision 5-2-3, 
dated March 31, 2023 (for Model BD-700-1A10 airplanes).
    (v) Bombardier Global 5000, BD-700 Temporary Revision 5-2-21, 
dated March 31, 2023 (for Model BD-700-1A11 airplanes).
    (vi) Bombardier Global 5000 GL 5000 Featuring Global Vision 
Flight Deck Temporary Revision 5-2-20, dated March 31, 2023 (for 
Model BD-700-1A11 airplanes).
    (vii) [Bombardier] Global 5500 GL 5500 Temporary Revision, 5-2-
3, dated March 31, 2023 (for Model BD-700-1A11 airplanes).
    (4) The following service information was approved for IBR on 
July 29, 2021 (86 FR 33088, June 24, 2021).

[[Page 49823]]

    (i) Bombardier Service Bulletin 700-1A11-27-041, Revision 1, 
dated December 7, 2020.
    (ii) Bombardier Service Bulletin 700-27-083, Revision 1, dated 
December 7, 2020.
    (iii) Bombardier Service Bulletin 700-27-5012, Revision 1, dated 
December 7, 2020.
    (iv) Bombardier Service Bulletin 700-27-5503, Revision 1, dated 
December 7, 2020.
    (v) Bombardier Service Bulletin 700-27-6012, Revision 1, dated 
December 7, 2020.
    (vi) Bombardier Service Bulletin 700-27-6503, Revision 1, dated 
December 7, 2020.
    (5) For Bombardier service information, 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.
    (6) 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.
    (7) 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 June 5, 2024.
Suzanne Masterson,
Deputy Director, Integrated Certificate Management Division, Aircraft 
Certification Service.
[FR Doc. 2024-12745 Filed 6-11-24; 8:45 am]
BILLING CODE 4910-13-P