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2023-24-08 BOMBARDIER, INC.: Amendment 39-22625; Docket No. FAA-2023-1706; Project Identifier MCAI-2023-00039-T.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective February 6, 2024.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to the Bombardier, Inc, airplanes, certificated in any
    category, identified in paragraphs (c)(1) through (6) of this AD.

(1) Model BD-700-1A10 airplanes, as identified in Bombardier Service Bull-
    etin 700-32-044, Revision 01, dated December 7, 2022.

(2) Model BD-700-1A10 airplanes, as identified in Bombardier Service Bull-
    etin 700-32-6021, Revision 01, dated December 7, 2022.

(3) Model BD-700-1A10 airplanes, as identified in Bombardier Service Bull-
    etin 700-32-6507, Revision 01, dated December 7, 2022.

(4) Model BD-700-1A11 airplanes, as identified in Bombardier Service Bull-
    etin 700-1A11-32-031, Revision 01, dated December 7, 2022.

(5) Model BD-700-1A11 airplanes, as identified in Bombardier Service Bull-
    etin 700-32-5021, Revision 01, dated December 7, 2022.

(6) Model BD-700-1A11 airplanes, as identified in Bombardier Service Bull-
    etin 700-32-5507, Revision 01, dated December 7, 2022.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 32, Landing gear.

(e) UNSAFE CONDITION

    This AD was prompted by reports  that the nose wheel steering selector
    valve (SSV)  can  be  slow  to deactivate under low temperature condi-
    tions. The FAA is issuing this AD  to address a possible delayed tran-
    sition to free caster mode  in  the  event of an un-commanded steering
    input. The unsafe condition, if not addressed, could result in an air-
    craft runway excursion.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) REQUIRED ACTION

    Within 66 months  or 3,200 flight hours,  whichever occurs first after
    the effective date of this AD: Replace SSV part number (P/N) 23600-101
    (Bombardier P/N GW415-6275-1)  with SSV P/N 23600-103  (Bombardier P/N
    GW415-6275-3) in accordance  with  the  Accomplishment Instructions of
    the applicable Bombardier service bulletin listed in figure 1 to para-
    graph (g) of this AD.

    ______________________________________________________________________
            FIGURE 1 TO PARAGRAPH (G)  SERVICE BULLETIN REFERENCES       
    ______________________________________________________________________
       MODEL          BOMBARDIER SERVICE BULLETIN          ISSUE DATE
    ______________________________________________________________________
    BD-700-1A10       700-32-044, Revision 01            December 7, 2022
    BD-700-1A10       700-32-6021, Revision 01           December 7, 2022
    BD-700-1A10       700-32-6507, Revision 01           December 7, 2022
    BD-700-1A11       700-1A11-32-031, Revision 01       December 7, 2022
    BD-700-1A11       700-32-5021, Revision 01           December 7, 2022
    BD-700-1A11       700-32-5507, Revision 01           December 7, 2022
    ______________________________________________________________________

(h) CREDIT FOR PREVIOUS ACTIONS

    This paragraph provides credit  for actions required by  paragraph (g)
    of this AD, if those actions were performed before the effective  date
    of this AD using the applicable Bombardier service bulletin listed  in
    figure 2 to paragraph (h) of this AD.

    ______________________________________________________________________
             FIGURE 2 TO PARAGRAPH (H)  CREDIT SERVICE BULLETINS         
    ______________________________________________________________________
       MODEL          BOMBARDIER SERVICE BULLETIN          ISSUE DATE
    ______________________________________________________________________
    BD-700-1A10                700-32-044               November 24, 2022
    BD-700-1A10                700-32-6021              November 24, 2022
    BD-700-1A10                700-32-6507              November 24, 2022
    BD-700-1A11                700-1A11-32-031          November 24, 2022
    BD-700-1A11                700-32-5021              November 24, 2022
    BD-700-1A11                700-32-5507              November 24, 2022
    ______________________________________________________________________

(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  of  the International
    Validation  Branch,  mail  it  to  ATTN:  Program  Manager, Continuing
    Operational Safety, at the  address identified in paragraph  (j)(2) of
    this   AD  or   email  to:   9-AVS-AIR-730-AMOC@faa.gov.  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  accom-
    plished using a method approved by the Manager,  International Valida-
    tion 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-2023-02,  dated January 11, 2023,  for
    related information.  This Transport Canada AD  may be found in the AD
    docket at regulations.gov under Docket No. FAA-2023-1706.

(2) For more information about this AD contact Gabriel Kim, Aviation Safe-
    ty Engineer, FAA,  1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
    telephone 516-228-7300; email 9-avs-nyaco-cos@faa.gov.

(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 700-32-044, Revision 01, dated December 7,
    2022.

(ii) Bombardier Service Bulletin 700-32-6021, Revision 01,  dated December
     7, 2022.

(iii) Bombardier Service Bulletin 700-32-6507, Revision 01, dated December
      7, 2022.

(iv) Bombardier Service Bulletin 700-1A11-32-031 Revision 01, dated Decem-
     ber 7, 2022.

(v) Bombardier Service Bulletin 700-32-5021 Revision 01, dated December 7,
    2022.

(vi) Bombardier Service Bulletin 700-32-5507,  Revision 01, dated December
     7, 2022.

(3) For service information identified in this AD, contact Bombardier Bus-
    iness Aircraft  Customer  Response  Center,  400 Cote-Vertu Road West,
    Dorval, Quebec H4S 1Y9, Canada;  telephone 514-855-2999; email ac.yul@
    aero.bombardier.com; website bombardier.com.

(4) You may view this service information at the FAA,  Airworthiness Prod-
    ucts 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 Admin-
    istration (NARA). For information on the availability of this material
    at NARA,  visit www.archives.gov/federal-register/cfr/ibr-locations or
    email fr.inspection@nara.gov.

Issued on November 29, 2023.  Victor Wicklund, Deputy Director, Compliance
& Airworthiness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT: Gabriel Kim,  Aviation  Safety  Engineer,
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228
-7300; email 9-avs-nyaco-cos@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


14 CFR Part 39

[Docket No. FAA-2023-1706; Project Identifier MCAI-2023-00039-T;
Amendment 39-22625; AD 2023-24-08]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes.
This AD was prompted by reports that the nose wheel steering selector
valve (SSV) can be slow to deactivate under low temperature conditions.
This AD requires replacing the affected SSV with a re-designed SSV that
has an improved response time. The FAA is issuing this AD to address
the unsafe condition on these products.

DATES: This AD is effective February 6, 2024.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of February 6,
2024.

ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2023-1706; 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
Cote-Vertu Road West, Dorval, Quebec H4S 1Y9, Canada;
telephone 514-855-2999; email 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-2023-1706.

FOR FURTHER INFORMATION CONTACT: Gabriel Kim, Aviation Safety Engineer,
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-
228-7300; email 9-avs-nyaco-cos@faa.gov.

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 BD-700-1A10 and BD-700-1A11 airplanes. The NPRM published
in the Federal Register on August 9, 2023 (88 FR 53823). The NPRM was
prompted by AD CF-2023-02, dated January 11, 2023, issued by Transport
Canada, which is the aviation authority for Canada (referred to after
this as the MCAI). The MCAI states that following a runway excursion on
a different model, an investigation revealed that the nose wheel SSV
can be slow to deactivate under low temperature conditions. A similar
SSV is installed on the airplanes to which this AD is applicable. In
the event of an un-commanded steering input, a slow SSV deactivation
could lead to a delayed transition to free caster mode and result in an
aircraft runway excursion.
In the NPRM, the FAA proposed to require replacing the affected SSV
with a re-designed SSV that has an improved response time. The FAA is
issuing this AD to address the unsafe condition on these products.
You may examine the MCAI in the AD docket at regulations.gov under
Docket No. FAA-2023-1706.

Discussion of Final Airworthiness Directive

Comments

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

Request To Add Bombardier Part Numbers

NetJets suggested adding Bombardier part numbers GW415-6275-1 &
GW415-6275-3 to paragraph (g) of the proposed AD, in addition to Safran
part numbers, as stated in SB 700-32-6021, paragraph 3., MATERIAL
INFORMATION. NetJets stated that, at new aircraft delivery, the
Bombardier part numbers are provided in the documentation of the
aircraft. The FAA infers that NetJets would like to ensure the proper
identification of the parts.

The FAA concurs with the suggestion. To aid in identifying the
parts, paragraph (g) of this AD has been changed to add the referenced
Bombardier part numbers.

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 the following Bombardier service information.
Service Bulletin 700-32-044, Revision 01, dated December
7, 2022.
Service Bulletin 700-32-6021, Revision 01, dated December
7, 2022.
Service Bulletin 700-32-6507, Revision 01, dated December
7, 2022.
Service Bulletin 700-1A11-32-031, Revision 01, dated
December 7, 2022.
Service Bulletin 700-32-5021, Revision 01, dated December
7, 2022.
Service Bulletin 700-32-5507, Revision 01, dated December
7, 2022.
This service information specifies procedures for replacing the
affected SSV with a re-designed SSV. These documents are distinct since
they apply to different airplane 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.

Costs of Compliance

The FAA estimates that this AD affects 442 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:

Estimated Costs for Required Actions

Labor cost
Parts cost
Cost per product
Cost on U.S. operators
4 work-hours x $85 per hour = $340
$5,542
$5,882
Up to $2,599,844

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

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]

2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive: