DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2025-0477; Project Identifier MCAI-2024-00422-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 report that incorrect
information was found in certain calculation tables in a section of the
airplane flight manual (AFM) that addresses certain slat-flap
conditions. This proposed AD would require revising the Non-Normal
Procedures section of the existing AFM to provide the flightcrew with
corrected procedures to use in certain slat-flap conditions. 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 May 12,
2025.

ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:

Federal eRulemaking Portal: Go to regulations.gov. Follow
the instructions for submitting comments.

Fax: 202-493-2251.

Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.

Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

AD Docket: You may examine the AD docket at regulations.gov under
Docke No. FAA-2025-0477; or in person at Docket Operations between 9 a.m. and
5 p.m., Monday through Friday, except Federal holidays. The AD docket
contains this NPRM, the mandatory continuing airworthiness information
(MCAI), any comments received, and other information. The street
address for Docket Operations is listed above.

Material Incorporated by Reference:

For Bombardier material identified in this proposed AD,
contact Bombardier Business Aircraft Customer Response Center, 400
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 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 9-avs-nyaco-cos@faa.gov.

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 the ADDRESSES section. Include "Docket No. FAA-2025-0477;
Project Identifier MCAI-2024-00422-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
9-avs-nyaco-cos@faa.gov. 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-2024-27, dated July 24, 2024 (Transport
Canada AD CF-2024-27) (also referred to 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 incorrect approach speed
adders and landing distance factors were discovered in the AFM tables
for the SLAT-FLAP FAIL (Caution) Crew Alerting System (CAS) message and
the jammed or inoperative slat/flap control lever (SFCL) non-normal
procedures. The incorrect speed adders and landing distance factors
present a potentially unsafe condition due to the shortfall between the
actual performance and the approved performance.

The FAA is proposing this AD to address incorrect speed adders and
landing distance factors in AFM tables. The unsafe condition, if not
addressed, could lead to increased workload for the flightcrew,
possible stick shaker activation (stall warning) due to a need to
increase speed beyond the published AFM speed adder, and increased
landing distance beyond published non-normal landing distance factors.

You may examine the MCAI in the AD docket at regulations.gov under
Docket No. FAA-2025-0477.

Material Incorporated by Reference Under 1 CFR Part 51

The FAA reviewed the following Bombardier material. This material
describes procedures to address certain slat-flap conditions (i.e.,
Slat-flap fail (Caution) CAS message, or a jammed or inoperative SFCL).
These documents are distinct since they apply to different
configurations and different airplane models.

Section 05-10 Flight Controls, Chapter 5--Non-Normal
Procedures (which includes the Jammed or Inoperative Slat/Flap Control
Lever Procedure and Slat-Flap Fail (Caution) procedure), Bombardier
Global Express AFM, Publication No. CSP 700-1, Revision 119, dated May
22, 2024. (For obtaining the procedures for Bombardier Global Express
AFM, Publication No. CSP 700-1, use Document Identification No. GL 700
AFM-1.)

Landing Distance Factors subsection, Non-Normal Procedure
section, Chapter 7--Supplement 20--Operations at Airport Elevations
above 10,000 feet (which includes Jammed or Inoperative Slat/Flap
Control Lever procedure and Slat-Flap Fail procedures); Bombardier
Global Express AFM, Publication No. CSP 700-1, Revision 119, dated May
22, 2024. (For obtaining the procedures for Bombardier Global Express
AFM, Publication No. CSP 700-1, use Document Identification No. GL 700
AFM-1.)

Section 05-10 Flight Controls, Chapter 5--Non-Normal
Procedures (which includes the Jammed or Inoperative Slat/Flap Control
Lever Procedure and Slat-Flap Fail (Caution) procedure), Bombardier
Global Express AFM, Publication No. CSP 700-1A, Revision 119, dated May
22, 2024. (For obtaining the procedures for Bombardier Global Express
AFM, Publication No. CSP 700-1A, use Document Identification No. GL 700
AFM-1A.)

Landing Distance Factors subsection, Non-Normal Procedure
section, Chapter 7--Supplement 20--Operations at Airport Elevations
above 10,000 feet (which includes Jammed or Inoperative Slat/Flap
Control Lever procedure and Slat-Flap Fail procedures), Bombardier
Global Express AFM, Publication No. CSP 700-1A, Revision 119, dated May
22, 2024. (For obtaining the procedures for Bombardier Global Express
AFM, Publication No. CSP 700-1A, use Document Identification No. GL 700
AFM-1A.)

Section 05-10 Flight Controls, Chapter 5--Non-Normal
Procedures (which includes the Jammed or Inoperative Slat/Flap Control
Lever Procedure and Slat-Flap Fail (Caution) procedure), Bombardier
Global 6000 AFM, Publication No. CSP 700-1V, Revision 49, dated May 22,
2024. (For obtaining the procedures for Bombardier Global 6000 AFM,
Publication No. CSP 700-1V, use Document Identification No. GL 6000
AFM.)

Landing Distance Factors subsection, Non-Normal Procedure
section, Chapter 7--Supplement 20--Operations at Airport Elevations
above 10,000 feet (which includes Jammed or Inoperative Slat/Flap
Control Lever procedure and Slat-Flap Fail procedures), Bombardier
Global 6000 AFM, Publication No. CSP 700-1V, Revision 49, dated
May 22, 2024. (For obtaining the procedures for Bombardier Global
6000 AFM, Publication No. CSP 700-1V, use Document Identification
No. GL 6000 AFM.)

Section 05-10 Flight Controls, Chapter 5--Non-Normal
Procedures (which includes the Jammed or Inoperative Slat/Flap Control
Lever Procedure and Slat-Flap Fail (Caution) procedure), Bombardier
Global 6500 AFM, Publication No. CSP 700-6500-1, Revision 21, dated May
22, 2024. (For obtaining the procedures for Bombardier Global 6500 AFM,
Publication No. CSP 700-6500-1, use Document Identification No. GL 6500
AFM.)

Section 05-10 Flight Controls, Chapter 5--Non-Normal
Procedures (which includes the Jammed or Inoperative Slat/Flap Control
Lever Procedure and Slat-Flap Fail (Caution) procedure) Bombardier
Global 5000 AFM, Publication No. CSP 700-5000-1 AFM, Revision 80, dated
May 22, 2024. (For obtaining the procedures for Bombardier Global 5000
AFM, Publication No. CSP 700-5000-1, use Document Identification No. GL
5000 AFM.)

Landing Distance Factors subsection, Non-Normal Procedure
section, Chapter 7--Supplement 20--Operations at Airport Elevations
above 10,000 feet (which includes Jammed or Inoperative Slat/Flap
Control Lever procedure and Slat-Flap Fail procedures), Bombardier
Global 5000 AFM, Publication No. CSP 700-5000-1 AFM, Revision 80, dated
May 22, 2024. (For obtaining the procedures for Bombardier Global 5000
AFM, Publication No. CSP 700-5000-1, use Document Identification No. GL
5000 AFM.)

Section 05-10 Flight Controls, Chapter 5--Non-Normal
Procedures (which includes the Jammed or Inoperative Slat/Flap Control
Lever Procedure and Slat-Flap Fail (Caution) procedure), Bombardier
Global 5000 Featuring Global Vision Flight Deck AFM, Publication No.
CSP 700-5000-1V, Revision 49, dated May 22, 2024. (For obtaining the
procedures for Bombardier Global 5000 Featuring Global Vision Flight
Deck AFM, Publication No. CSP 700-5000-1V, use Document Identification
No. GL 5000 GVFD AFM.)

Landing Distance Factors subsection, Non-Normal Procedure
section, Chapter 7--Supplement 20--Operations at Airport Elevations
above 10,000 feet (which includes Jammed or Inoperative Slat/Flap
Control Lever procedure and Slat-Flap Fail procedures), Bombardier
Global 5000 Featuring Global Vision Flight Deck AFM, Publication No.
CSP 700-5000-1V, Revision 49, dated May 22, 2024. (For obtaining the
procedures for Bombardier Global 5000 Featuring Global Vision Flight
Deck AFM, Publication No. CSP 700-5000-1V, use Document Identification
No. GL 5000 GVFD AFM.)

Section 05-10 Flight Controls, Chapter 5--Non-Normal
Procedures (which includes the Jammed or Inoperative Slat/Flap Control
Lever Procedure and Slat-Flap Fail (Caution) procedure), Bombardier
Global 5500 AFM, Publication No. CSP 700-5500-1, Revision 21, dated May
22, 2024. (For obtaining the procedures for Bombardier Global 5500 AFM,
Publication No. CSP 700-5500-1, use Document Identification No. GL 5500
AFM.)

This material is reasonably available because the interested
parties have access to it through their normal course of business or by
the means identified in the ADDRESSES section.

FAA's Determination

This product has been approved by the aviation authority of another
country and is approved for operation in the United States. Pursuant to
the FAA's bilateral agreement with this State of Design Authority, it
has notified the FAA of the unsafe condition described in the MCAI and
material referenced above. The FAA is issuing this NPRM after
determining that the unsafe condition described previously is likely to
exist or develop on other products of the same type design.

Proposed AD Requirements in This NPRM

This proposed AD would require revising the existing AFM to correct
table information in procedures to address certain slat-flap conditions
(Slat-flap fail (Caution) CAS message, or a jammed or inoperative SFCL).

Compliance With AFM Revisions

Transport Canada AD CF-2024-27 requires operators to "advise all
flight crews" of revisions to the AFM, and thereafter to "operate the
aeroplane accordingly." However, this proposed AD would not
specifically require those actions as those actions are already
required by FAA regulations. FAA regulations require operators furnish
to pilots any changes to the AFM (for example, 14 CFR 121.137), and to
ensure the pilots are familiar with the AFM (for example, 14 CFR
91.505). As with any other flightcrew training requirement, training on
the updated AFM content is tracked by the operators and recorded in
each pilot's training record, which is available for the FAA to review.
FAA regulations also require pilots to follow the procedures in the
existing AFM including all updates. 14 CFR 91.9 requires that any
person operating a civil aircraft must comply with the operating
limitations specified in the AFM. Therefore, including a requirement in
this proposed AD to operate the airplane according to the revised AFM
would be redundant and unnecessary.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would
affect 476 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:

Estimated Costs for Required Actions

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

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: