DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0398; Project Identifier MCAI-2020-00881-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 CL-600-1A11 (600), CL-600-2A12
(601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes.
This proposed AD was prompted by reports that during certain operating
modes, the flight guidance/autopilot does not account for engine
failure while capturing an altitude. This proposed AD would require
revising the existing airplane flight manual (AFM) to provide the
flightcrew with a new limitation and procedure for operation during
certain flight modes. 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 26,
2022.

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 https://www.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.
For 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 ac.yul@aero.bombardier.com; internet https://www.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.

Examining the AD Docket

You may examine the AD docket on the internet at https://www.regulations.gov by
searching for and locating Docket No. FAA-2022-
0398; 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. Comments will be available in the AD
docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aerospace
Engineer, Avionics and Electrical Systems Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone
516-228-7367; 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 ADDRESSES. Include ``Docket No. FAA-2022-0398; Project Identifier
MCAI-2020-00881-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
https://www.regulations.gov, including any personal information you
provide. The agency will also post a report summarizing each
substantive verbal contact received about this proposed AD.

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
Steven Dzierzynski, Aerospace Engineer, Avionics and Electrical Systems
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7367; 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 Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2020-02, dated February 13,
2020 (TCCA AD CF-2020-02) (also referred to as the MCAI), to correct an
unsafe condition for certain Bombardier, Inc., Model CL-600-1A11 (600),
CL-600-2A12 (601), and CL-600-2B16 (601-3A,
601-3R, and 604 Variants) airplanes. You may examine the MCAI in the AD
docket on the internet at https://www.regulations.gov by searching for
and locating Docket No. FAA-2022-0398.
This proposed AD was prompted by reports that during ALTSEL, ASEL,
or ALTS CAP mode, the flight guidance/autopilot does not account for
engine failure while capturing an altitude. The FAA is proposing this
AD to address a possible engine failure during or before a climb while
in ALTSEL, ASEL or ALTS CAP mode, which could cause the airspeed to
drop significantly below the safe operating speed. Prompt crew
intervention may be required to maintain a safe operating speed. See
the MCAI for additional background information.

Related Service Information Under 1 CFR Part 51

Bombardier has issued the following service information. This
service information contains a new AFM limitation and procedure for
operation during certain flight modes. These documents are distinct
since they apply to different airplane configurations. These
configurations may include the presence or absence of winglets,
incorporation of service bulletin 601-0300 which introduces an airspeed
limitation placard, and the type of engine installed on the airplane.
Automatic Flight Control System limitation in the Systems
Limitations in the Limitations section and Engine Failure in Climb
During ALTSEL procedure in the Airplane Handling Procedures Following
Engine Failure procedures in the Normal Procedures section of the
Canadair Challenger AFM, Product Publication No. 600, Revision A115,
dated June 16, 2021.
Automatic Flight Control System limitation in the Systems
Limitations in the Limitations section and Engine Failure in Climb
During ALTSEL procedure in the Airplane Handling Procedures Following
Engine Failure procedures in the Abnormal Procedures section of the
Canadair Challenger AFM, Product Support Publication (PSP) No. 600-1,
Revision 107, dated June 16, 2021.
Automatic Flight Control System limitation in the Systems
Limitations in the Limitations section and Engine Failure in Climb
During ALTSEL procedure in the Airplane Handling Procedures Following
Engine Failure procedures in the Abnormal Procedures section of the
Canadair Challenger AFM, PSP No. 601-1A, Revision 129, dated June 16,
2021.
Automatic Flight Control System limitation in the Systems
Limitations in the Limitations section and Engine Failure in Climb
During ALTSEL procedure in the Airplane Handling Procedures Following
Engine Failure procedures in the Abnormal Procedures section of the
Canadair Challenger AFM, PSP No. 601-1A-1, Revision 83, dated June 16,
2021.
Automatic Flight Control System limitation in the Systems
Limitations in the Limitations section and Engine Failure in Climb
During ALTSEL procedure in the Airplane Handling Procedures Following
Engine Failure procedures in the Abnormal Procedures section of the
Canadair Challenger AFM, PSP No. 601-1B, Revision 87, dated June 16,
2021.
Automatic Flight Control System limitation in the Systems
Limitations in the Limitations section and Engine Failure in Climb
During ALTSEL procedure in the Airplane Handling Procedures Following
Engine Failure procedures in the Abnormal Procedures section of the
Bombardier Canadair Challenger AFM, PSP No. 601-1B-1, Revision 85,
dated June 16, 2021.
Automatic Flight Control System limitation in the Systems
Limitations in the Limitations section and Engine Failure in Climb
During ASEL procedure in the Airplane Handling Procedures Following
Engine Failure procedures in the Abnormal Procedures section of the
Canadair Challenger AFM, PSP No. 601A-1, Revision 107, dated June 16,
2021.
Automatic Flight Control System limitation in the Systems
Limitations in the Limitations section and Engine Failure in Climb
During ASEL procedure in the Airplane Handling Procedures Following
Engine Failure procedures in the Abnormal Procedures section of the
Bombardier Canadair Challenger AFM, PSP No. 601A-1-1, Revision 96,
dated June16, 2021.
Automatic Flight Control Systems limitation specified in
Section 02-08, Systems Limitations, of Chapter 2--Limitations; and the
Engine Failure in Climb During (V) ALTS CAP or (V) ALTV CAP procedure
in Section 05-03, Single Engine Procedures, of Chapter 5--Abnormal
Procedures of the Bombardier Challenger 604 AFM, Publication No. PSP
604-1, Revision 124, dated November 24, 2021. (For obtaining the
limitation and procedure for the Bombardier Challenger 604 AFM,
Publication No. PSP 604-1, use Document Identification No. CH 604 AFM.)
Automatic Flight Control Systems limitation specified in
Section 02-08, Systems Limitations, of Chapter 2--Limitations; and the
Engine Failure in Climb During (V) ALTS CAP or (V) ALTV CAP procedure
in Section 05-03, Single Engine Procedures, of Chapter 5--Abnormal
Procedures of the Bombardier Challenger 605 AFM, Publication No. PSP
605-1, Revision 62, dated November 24, 2021. (For obtaining the
limitation and procedure for the Bombardier Challenger 605 AFM,
Publication No. PSP 605-1, use Document Identification No. CH 605 AFM.)
Automatic Flight Control Systems limitation specified in
Section 02-08, Systems Limitations, of Chapter 2--Limitations; and the
Engine Failure in Climb During (V) ALTS CAP or (V) ALTV CAP procedure
in Section 05-03, Single Engine Procedures, of Chapter 5--Abnormal
Procedures of the Bombardier Challenger 650 AFM, Publication No. PSP
650-1, Revision 27, dated November 24, 2021. (For obtaining the
limitation and procedure for the Bombardier Challenger 650 AFM,
Publication No. PSP 650-1, use Document Identification No. CH 650 AFM.)
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

These products have been approved by the aviation authority of
another country, and are approved for operation in the United States.
Pursuant to the FAA's bilateral agreement with the State of Design
Authority, the FAA has been notified of the unsafe condition described
in the MCAI and service information referenced above. The FAA is
proposing this AD because the FAA evaluated all the relevant
information and determined the unsafe condition described previously is
likely to exist or develop on other products of these same type
designs.

Proposed Requirements of This NPRM

This proposed AD would require revising the existing AFM to provide
the flightcrew with a new limitation and procedure for operation during
flight in certain flight modes.

Differences Between This Proposed AD and the MCAI

This NPRM updates certain AFM revision levels identified in TCCA AD
CF-2020-02, and therefore identifies the complete, most recent service
information that will be incorporated by reference in the final rule.
Operators should note that Bombardier revised the ALTS CAP mode to (V)
ALTS CAP or
(V) ALTV CAP mode in a revision prior to the latest revisions of the
Bombardier Challenger 604/605/650 AFMs referenced in this AD.

Costs of Compliance

The FAA estimates that this proposed AD affects 133 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: