preamble attached >>>
ADs updated daily at www.Tdata.com
PROPOSED AD BOMBARDIER, INC.: Docket No. FAA-2020-1034; Project Identifier MCAI-2020-00951-T.
(a) COMMENTS DUE DATE

    The FAA must receive comments by January 11, 2021.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to Bombardier, Inc.,  Model  CL-600-2B16  (601-3A, 601
    -3R, and 604  Variants), serial numbers  5301 through 5665  inclusive,
    and 5701 through 5988 inclusive, certificated in any category.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 34, Navigation.

(e) REASON

    This AD was prompted  by  a determination that certain airplanes  have
    outdated magnetic variation (MagVar) tables inside navigation systems.
    The FAA is  issuing this AD  to address outdated  MagVar tables inside
    navigation systems, which can affect the performance of the navigation
    systems and result in the presentation of misleading magnetic  heading
    references on  the Primary  Flight Displays  (PFDs) and Multi-Function
    Displays (MFDs), positioning the  airplane outside of the  terrain and
    obstacle  protection  provided  by  instrument  flight  procedures and
    flight  route  designs  (e.g.,  outdated  MagVar  tables  can  lead to
    significantly inaccurate heading, course, and bearing calculations).

(f) COMPLIANCE

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

(g) AIRPLANE FLIGHT MANUAL (AFM) REVISION

    Within 60 days after the effective date of this AD:  Revise the exist-
    ing AFM to incorporate  the information  specified  in  Section 02-09,
    Navigation Systems Limitations,  of  Chapter 2 - LIMITATIONS,  of  the
    applicable Bombardier Challenger AFM specified  in  figure 1  to para-
    graph (g) of this AD.

                  FIGURE 1 TO PARAGRAPH (G)  AFM REVISIONS               
    ______________________________________________________________________
    BOMBARDIER AIRPLANE
    MODEL/SERIAL NUMBER         AFM TITLE                 AFM REVISION
    ______________________________________________________________________
    CL-600-2B16                 Bombardier             Revision 116, dated
    (Variant 604)               Challenger CL-604      December 18, 2019
    5301 through                AFM, PSP 604-1
    5665 inclusive

    CL-600-2B16                 Bombardier             Revision 54, dated
    (Variant 604)               Challenger CL-605      December 18, 2019
    5701 through                AFM, PSP 605-1
    5988 inclusive
    ______________________________________________________________________

(h) OTHER FAA AD PROVISIONS

    The following provisions also apply to this AD:

(1) Alternative Methods of Compliance (AMOCs):  The Manager,  New York ACO
    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 certification office,  send
    it to ATTN: Program  Manager, Continuing Operational Safety,  FAA, New
    York ACO Branch, 1600 Stewart  Avenue, Suite 410, Westbury, NY  11590;
    telephone 516-228-7300;  fax 516-794-5531.  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,  New York  ACO
    Branch, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier,
    Inc.'s TCCA  Design Approval  Organization (DAO).  If approved  by the
    DAO, the approval must include the DAO-authorized signature.

(i) RELATED INFORMATION

(1) Refer   to   Mandatory  Continuing  Airworthiness  Information  (MCAI)
    Canadian AD CF-2020-24, dated July 10, 2020,  for related information.
    This MCAI may be found in the AD docket on the internet at https://www
    .regulations.gov by searching for  and  locating  Docket No. FAA-2020-
    1034.

(2) For more information about this AD,  contact Steven Dzierzynski, Aero-
    space Engineer, Avionics and Electrical Systems Services Section, FAA,
    New York  ACO Branch,  1600 Stewart Avenue,  Suite  410,  Westbury, NY
    11590; phone: 516-228-7367; fax: 516-794-5531; email: 9-avs-nyaco-cos@
    faa.gov.

(3) For  service information identified  in this AD,  contact  Bombardier,
    Inc.,  200 Cote-Vertu Road West, Dorval, Quebec H4S 2A3, Canada; North
    America toll-free telephone:  1-866-538-1247 or direct-dial telephone:
    1-514-855-2999;  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.

Issued on November 19, 2020.  Lance T. Gant,  Director,  Compliance & Air-
worthiness Division, Aircraft Certification Service.

DATES: The FAA must receive comments  on  this  proposed AD by January 11,
2021.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-1034; Project Identifier MCAI-2020-00951-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 adopt a new airworthiness directive (AD)
for certain Bombardier Inc., Model CL-600-2B16 (601-3A, 601-3R, and 604
Variants) airplanes. This proposed AD was prompted by a determination
that certain airplanes have outdated magnetic variation (MagVar) tables
inside navigation systems. This proposed AD would require revising the
existing airplane flight manual (AFM) to update the Flight Management
System (FMS) and Inertial Reference System (IRS) limitations. 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 January 11,
2021.

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, Inc., 200 Cote-Vertu Road West, Dorval, Quebec
H4S 2A3, Canada; North America toll-free telephone: 1-866-538-1247 or
direct-dial telephone: 1-514-855-2999; 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-2020-1034;
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, 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 Services Section, FAA, New
York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: 516-228-7367; fax: 516-794-5531; 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-2020-1034;
Project Identifier MCAI-2020-00951-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
Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite
410, Westbury, NY 11590; phone: 516-228-7367; fax: 516-794-5531; 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.

Discussion

Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2020-24, dated July 10,
2020 (referred to after this as the Mandatory Continuing Airworthiness
Information, or "the MCAI"), to correct an unsafe condition for
certain Bombardier Inc., Model 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-2020-1034.

This proposed AD was prompted by a determination that certain
airplanes have outdated MagVar tables inside navigation systems. The
FAA is proposing this AD to address outdated MagVar tables inside
navigation systems, which can affect the performance of the navigation
systems and result in the presentation of misleading magnetic heading
references on the Primary Flight Displays (PFDs) and Multi-Function
Displays (MFDs), positioning the airplane outside of the terrain and
obstacle protection provided by instrument flight procedures and flight
route designs (e.g., outdated MagVar tables can lead to significantly
inaccurate heading, course, and bearing calculations). See the MCAI for
additional background information.

Related Service Information Under 1 CFR Part 51


Bombardier has issued the following service information, which
provides procedures for updating, among other systems, the FMS and IRS
of the applicable AFM. These documents are distinct since they apply to
different airplane configurations.

Section 02-09, Navigation Systems Limitations, of Chapter
2--LIMITATIONS, of the Bombardier Challenger CL-604 AFM, PSP 604-1,
Revision 116, dated December 18, 2019.

Section 02-09, Navigation Systems Limitations, of Chapter
2--LIMITATIONS, Bombardier Challenger CL-605 AFM, PSP 605-1, Revision
54, dated December 18, 2019.

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 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 the same type design.

Proposed Requirements of This NPRM

This proposed AD would require revising the existing AFM to update
the FMS and IRS limitations of the applicable AFM.

Costs of Compliance

The FAA estimates that this proposed AD affects 39 airplanes of
U.S. registry. The FAA estimates the following costs to comply with
this proposed AD:

Estimated Costs for Required Actions

Labor cost
Parts cost
Cost per product
Cost on U.S. operators
1 work-hour x $85 per hour = $85
$0
$85
$3,315

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) 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 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 (AD):