(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective May 3, 2024.

(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,  serial  numbers  9002
    through 9879 inclusive, 9998, and 60001 and subsequent.

(d) SUBJECT

    Air Transport Association (ATA) of America Code: 36, Pneumatic.

(e) UNSAFE CONDITION

    This AD was prompted by  reports that some overheat detection  sensing
    elements of the bleed air leak detection system were manufactured with
    insufficient salt  fill. The  FAA is  issuing this  AD to address non-
    conforming sensing  elements of  the bleed air leak  detection system.
    The unsafe condition, if not  addressed, could result in an  inability
    to detect  hot bleed  air leaks  and consequent  damage to surrounding
    structures and systems, which could prevent continued safe flight  and
    landing.

(f) COMPLIANCE

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

(g) DEFINITIONS

    For the purpose  of this AD,  the definitions specified  in paragraphs
    (g)(1) through (3) of this AD apply.

(1) The following  Model BD-700-1A10 and  BD-700-1A11 airplane groups  are
    identified in (g)(1)(i) through (iv) of this AD:

(i) Group A airplanes: serial  numbers (S/N) 9002 through 9151  inclusive,
    and 9153.

(ii) Group B airplanes: S/N 9152, 9154 through 9879 inclusive, 9998, 60001
     through 60041 inclusive, 60043, 60044, 60045, and 60051.

(iii) Group  C  airplanes:  S/N  60042, 60046,  60047,  60049, 60053,  and
      subsequent.

(iv) Group D airplanes: S/N 60048, 60050, and 60052.

(2) An affected part  is a sensing element  marked with a date  code A0448
    through A2104 inclusive and having an LTS/Kidde part number  specified
    in  Liebherr  Service  Bulletin CFD-F1958-26-01,  dated  May  6, 2022,
    unless that sensing element meets the criteria specified in  paragraph
    (g)(2)(i) or (ii) of this AD.

(i) The sensing element has been  tested as specified in Section 3  of the
    Accomplishment  Instructions of  Kidde Aerospace  and Defense  Service
    Bulletin CFD-26-1,  Revision 6,  dated February  28, 2022,  or earlier
    revisions,  and has  been found  to be  serviceable; and  the  sensing
    element has  been marked  on one  face of  its connector  hex nut  and
    packaged  as   specified  in   Section  3.C.   of  the  Accomplishment
    Instructions of  Kidde Aerospace  and Defense  Service Bulletin CFD-26
    -1, Revision 6, dated February 28, 2022, or earlier revisions.

(ii) The sensing element  has been tested and  found to be serviceable  as
     specified in paragraph  (j) of this  AD; and the  sensing element has
     been marked on one face of one connector hex nut with one green mark,
     as  specified  in Figure  4  (the figure  is  representative for  all
     sensing  elements)   in  the   Accomplishment  Instructions   of  the
     applicable  Bombardier  service  bulletin  (BA  SB)  in  figure  1 to
     paragraph (g)(2)(ii) of this AD.
    ______________________________________________________________________

    ILLUSTRATION

    FIGURE 1 TO PARAGRAPH (G)(2)(II)--APPLICABLE SERVICE INFORMATION
    ______________________________________________________________________

(3) A serviceable part is a sensing element that is  not an affected part.

(h) MAINTENANCE RECORDS VERIFICATION

    For Groups A and C  whose airplane date of manufacture,  as identified
    on  the  identification  plate  of the  airplane  or  in  the aircraft
    maintenance logbook, is on or before July 27, 2022 (the effective date
    of Transport Canada AD CF-2022-38): Within 60 days after the effective
    date of this  AD, examine the  airplane maintenance records  to verify
    whether any affected part has  been installed since the airplane  date
    of  manufacture,  as identified  on  the identification  plate  of the
    airplane or in the aircraft maintenance logbook.

(1) If  the maintenance  records confirm  that an  affected part  has been
    installed, or if it cannot be confirmed that an affected part has  not
    been installed,  paragraphs (i)  and (j)  of this  AD must be complied
    with within  the applicable  compliance times  specified in paragraphs
    (i) and (j) of this AD.

(2) For Groups A and C airplanes: if the maintenance records confirm  that
    no  affected  parts  have  been  installed  since  airplane  date   of
    manufacture,  then  paragraphs  (i)  and  (j)  of  this  AD  are   not
    applicable.

(i) MINIMUM EQUIPMENT LIST (MEL) REVISION

    For Groups B and D airplanes, and Groups A and C airplanes required by
    paragraph (h) of this AD: Within  90 days after the effective date  of
    this  AD,  revise the  operator's  existing MEL  by  incorporating the
    information specified in figures 2 through 8 to paragraph (i) of  this
    AD,  as applicable.  This  may  be done  by inserting  a copy  of this
    information into the operator's existing MEL.
    ______________________________________________________________________

    ILLUSTRATION

    FIGURE 2 TO PARAGRAPH (I)--MMEL ITEM 36-12-01

    ILLUSTRATION

    FIGURE 3 TO PARAGRAPH (I)--MMEL ITEM

    ILLUSTRATION

    FIGURE 4 TO PARAGRAPH (I)--MMEL ITEM

    ILLUSTRATION

    FIGURE 5 TO PARAGRAPH (I)--L BLEED FAULT

    ILLUSTRATION

    FIGURE 6 TO PARAGRAPH (I)--R BLEED FAULT

    ILLUSTRATION

    FIGURE 7 TO PARAGRAPH (I)--WING A/ICE FAULT

    ILLUSTRATION

    FIGURE 8 TO PARAGRAPH (I)--TRIM AIR FAULT
    ______________________________________________________________________

(j) TESTING  AND  REPLACEMENT  OF   AFFECTED  OVERHEAT  DETECTION  SENSING
    ELEMENTS

(1) For Group B and D airplanes,  and Group A and C airplanes required  by
    paragraph (h)  of this  AD: Within  2,000 flight  hours or 120 months,
    whichever occurs first, from the  effective date of this AD,  test the
    overheat  detection  sensing  elements   to  determine  if  they   are
    serviceable, in accordance with the Accomplishment Instructions of the
    applicable Bombardier service bulletin in paragraphs (j)(1)(i) through
    (vi) of this AD.

(i) For  Model  BD-700-1A11  (Global  5000) airplanes:  Bombardier Service
    Bulletin 700-1A11-36-005, Basic Issue, dated December 23, 2022.

(ii) For  Model  BD-700-1A10  (Global  Express  and  Global  Express  XRS)
     airplanes: Bombardier Service Bulletin 700-36-026, Basic Issue, dated
     December 23, 2022.

(iii) For Model  BD-700-1A11 (Global 5000  featuring Global Vision  Flight
      Deck)  airplanes:  Bombardier  Service  Bulletin  700-36-5002, Basic
      Issue, dated December 23, 2022.

(iv) For  Model BD-700-1A11  (Global 5500)  airplanes: Bombardier  Service
     Bulletin 700-36-5501, Basic Issue, dated December 23, 2022.

(v) For  Model  BD-700-1A10 (Global  6000) airplanes:  Bombardier  Service
    Bulletin 700-36-6002, Basic Issue, dated December 23, 2022.

(vi) For  Model BD-700-1A10  (Global 6500)  airplanes: Bombardier  Service
     Bulletin 700-36-6501, Basic Issue, dated December 23, 2022.

(2) For each sensing element that is  serviceable, as determined  by para-
    graph  (j)(1) of  this AD,  before further  flight, mark  the  sensing
    element  with a  witness mark  in accordance  with the  Accomplishment
    Instructions  in  the   applicable  Bombardier  service   bulletin  in
    paragraphs (j)(1)(i) through (vi) of this AD.

(3) For  each sensing  element that  is not  serviceable, as determined by
    paragraph  (j)(1)  of  this AD,  before  further  flight, replace  the
    sensing  element  with  a  serviceable  part  in  accordance  with the
    Accomplishment  Instructions  in  the  applicable  Bombardier  Service
    Bulletin in paragraphs (j)(1)(i) through (vi) of this AD.

(k) PARTS INSTALLATION PROHIBITION

    As of the  effective date of  this AD, no  person may install,  on any
    airplane, any affected part unless it is a serviceable part.

(l) NO REPORTING REQUIREMENT

    Although  Bombardier  service  bulletins  in  figure  1  to  paragraph
    (g)(2)(ii) and paragraphs (j)(1)(i) through (vi) of this AD specify to
    submit  certain  information to  the  manufacturer, this  AD  does not
    include that requirement.

(m) 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  (n)(2) of
    this AD or email to: 9-avs-nyaco-cos@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
    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.

(n) ADDITIONAL INFORMATION

(1) Refer  to Transport  Canada AD  CF-2023-17, dated  March 8,  2023, for
    related information. This Transport Canada  AD may be found in  the AD
    docket at regulations.gov under Docket No. FAA-2023-2000.

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

(o) 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   700-1A11-36-005,  Basic  Issue,  dated
    December 23, 2022.

(ii) Bombardier Service Bulletin  700-36-026, Basic Issue, dated  December
     23, 2022.

(iii) Bombardier Service Bulletin 700-36-5002, Basic Issue, dated December
      23, 2022.

(iv) Bombardier Service Bulletin 700-36-5501, Basic Issue, dated  December
     23, 2022.

(v) Bombardier Service Bulletin  700-36-6002, Basic Issue, dated  December
    23, 2022.

(vi) Bombardier Service Bulletin 700-36-6501, Basic Issue, dated  December
     23, 2022.

(vii) Liebherr Service Bulletin CFD-F1958-26-01, dated May 6, 2022.

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

(4) For Liebherr-Aerospace Toulouse SAS service information  identified in
    this  AD, contact  Liebherr-Aerospace  Toulouse  SAS, 408,  Avenue des
    Etats-Unis--B.P.52010,  31016  Toulouse Cedex,  France;  telephone +33
    (0)5.61.35.28.28;      fax      +33      (0)5.61.35.29.29;       email
    techpub.toulouse@liebherr.com; website liebherr.aero.

(5) You  may view this  service information at the FAA, Airworthiness Pro-
    ducts Section, Operational Safety Branch, 2200 South 216th Street, 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/ibr
-locationsoremailfr.inspection@nara.gov">www.archives.gov/federal-register
/cfr/ibr-locationsoremailfr.inspection@nara.gov.

Issued on February 8, 2024. Victor Wicklund, Deputy Director, Compliance &
Airworthiness Division, Aircraft Certification Service.

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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-2000; Project Identifier MCAI-2023-00415-T; 
Amendment 39-22678; AD 2024-03-08]
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 some overheat detection sensing 
elements of the bleed air leak detection system were manufactured with 
insufficient salt fill, which can result in an inability to detect hot 
bleed air leaks. This AD requires maintenance records verification, and 
if an affected part is installed, would prohibit the use of certain 
Master Minimum Equipment List (MMEL) items under certain conditions by 
requiring revising the operator's existing Minimum Equipment List 
(MEL). This AD also requires testing the overheat detection sensing 
elements, marking each serviceable sensing element with a witness mark, 
and replacing each nonserviceable part with a serviceable part. This AD 
also prohibits the installation of affected parts under certain 
conditions. The FAA is issuing this AD to address the unsafe condition 
on these products.

DATES: This AD is effective May 3, 2024.

    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of May 3, 2024.

ADDRESSES: 

    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2023-2000; 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 Bombardier service information identified in this 
final rule, contact Bombardier Business Aircraft Customer Response 
Center, 400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, 
Canada; telephone 514-855-2999; email bombardier.com">ac.yul@aero.bombardier.com; 
website bombardier.com.

     For Liebherr-Aerospace Toulouse SAS service information 
identified in this final rule, contact Liebherr-Aerospace Toulouse SAS, 
408, Avenue des Etats-Unis-B.P.52010, 31016 Toulouse Cedex, France; 
telephone +33 (0)5.61.35.28.28; fax +33 (0)5.61.35.29.29; email 
techpub.toulouse@liebherr.com; website liebherr.aero.

     You may view this material at the FAA, Airworthiness 
Products Section, Operational Safety Branch, 2200 South 216th Street, 
Des Moines, WA. For information on the availability of this material at 
the FAA, call 206-231-3195. It is also available in the AD docket at 
regulations.gov under Docket No. FAA-2023-2000.

FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, 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 November 15, 2023 (88 FR 78251). The NPRM 
was prompted by AD CF-2023-17, dated March 8, 2023 (Transport Canada AD 
CF-2023-17) (also referred to as the MCAI), issued by Transport Canada, 
which is the aviation authority for Canada. The MCAI states that 
Bombardier received reports from the supplier of the overheat detection 
sensing elements of a manufacturing quality escape. Some of the sensing 
elements of the bleed air leak detection system were manufactured with 
insufficient salt fill. This condition can result in an inability to 
detect hot bleed air leaks, which can cause damage to surrounding 
structures and systems and prevent continued safe flight and landing.

    In the NPRM, the FAA proposed to require maintenance records 
verification, and if an affected part is installed, would prohibit the 
use of certain MMEL items under certain conditions by requiring 
revising the operator's existing MEL. The NPRM also proposed to require 
testing the overheat detection sensing elements, marking each 
serviceable sensing element with a witness mark, and replacing each 
nonserviceable part with a serviceable part. The NPRM also proposed to 
prohibit the installation of affected parts under certain conditions. 
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-2023-2000.

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 to the comment.

Request for Clarification on Location of Date of Manufacture

    NetJets requested a statement be added to paragraph (h) of the 
proposed AD that the date of manufacture can be found in the aircraft 
maintenance logbook, in addition to the identification plate of the 
airplane on certain airplanes. This information is stated in Transport 
Canada AD CF-2023-17, Part II, paragraph (A). NetJets further stated 
that Bombardier no longer stamps a date on the airframe data plate.

    The FAA agrees the date of manufacture can be found either on the 
identification plate of certain airplanes or in the aircraft 
maintenance logbook. The FAA has amended paragraph (h) of this AD to 
specify the two locations where the date of manufacture can be found.

Change to NPRM Applicability

    Paragraph (c) of this AD has been revised to clarify that the 
applicability is limited to certain serial numbers, which are also 
identified in Transport Canada AD CF-2023-17.

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 
comment 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 Liebherr Service Bulletin CFD-F1958-26-01, dated 
May 6, 2022, which specifies part numbers for affected sensing 
elements.

    The FAA reviewed the following Bombardier service bulletins, which 
specify procedures for testing each leak detection loop (LDL) sensing 
element installed on the airplane, marking each serviceable sensing 
element with a witness mark, and replacing each nonserviceable part 
with a serviceable part. These documents are distinct since they apply 
to different airplane models and configurations.

     Bombardier Service Bulletin 700-1A11-36-005, Basic Issue, 
dated December 23, 2022;

     Bombardier Service Bulletin 700-36-026, Basic Issue, dated 
December 23, 2022;

     Bombardier Service Bulletin 700-36-5002, Basic Issue, 
dated December 23, 2022;

     Bombardier Service Bulletin 700-36-5501, Basic Issue, 
dated December 23, 2022; and

     Bombardier Service Bulletin 700-36-6002, Basic Issue, 
dated December 23, 2022;

     Bombardier Service Bulletin 700-36-6501, Basic Issue, 
dated December 23, 2022.

    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.

Costs of Compliance

    The FAA estimates that this AD affects 160 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:

                                      Estimated Costs for Required Actions

    The FAA has received no definitive data on which to base the cost 
estimates for the on-condition actions specified in this AD. The FAA 
estimates it takes up to 1.5 hours to replace one sensor.

    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: