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PROPOSED AD BOMBARDIER, INC.: Docket No. FAA-2020-0843; Product Identifier 2020-NM-073-AD.
(a) COMMENTS DUE DATE

    The FAA must receive comments by November 2, 2020.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This  AD applies  to  Bombardier,  Inc., Model  BD-700-1A10 airplanes,
    certificated in any category,  serial numbers 9002, 9003,  9011, 9016,
    9020,  9022  through  9025 inclusive,  9029,  9031,  9032, 9036,  9039
    through 9044 inclusive, 9046 through 9058 inclusive, 9060 through 9065
    inclusive, 9067 through 9081  inclusive, 9083 through 9106  inclusive,
    9108 through 9122 inclusive, 9124 through 9126 inclusive, 9128,  9129,
    9133, 9134, 9136 through 9139 inclusive, 9141 through 9148  inclusive,
    9150, 9151, 9153, 9159, 9162, 9163, 9165, and 9169.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 33, Lights.

(e) REASON

    This AD was prompted by a report of smoke and signs of an  overheating
    condition  from the  emergency light  battery (ELB)  due to  excessive
    corrosion surrounding the internal  lead acid batteries, which  caused
    an electrical  short circuit  that led  to the  smoke and  overheating
    condition. The  FAA is  issuing this  AD to  address such  conditions,
    which could cause fire onboard the airplane.

(f) COMPLIANCE

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

(g) INSPECTION AND CORRECTIVE ACTION

    Within 15 months after the effective date of this AD,  inspect the ELB
    to determine the last replacement  date or the manufacturing date,  as
    applicable; if any date  is 4 years or  older, replace the ELB  before
    further flight. Do the  actions in accordance with  the Accomplishment
    Instructions of Bombardier Service Bulletin 700-33-024,  dated May 13,
    2019.  For  airplanes  on  which  the  restoration  task  specified in
    paragraph (h) of this  AD was done before  the effective date of  this
    AD, the requirements of paragraph (g) of this AD are not required.

(h) MAINTENANCE OR INSPECTION PROGRAM REVISION

    Within  60  days after  the  effective date  of  this AD,  revise  the
    existing maintenance or inspection program, as applicable, to  include
    the  information  specified  in  Bombardier  BD-700  Supplemental Time
    Limits/Maintenance Checks (STLMC) Chapter 5 task number  33-51-54-603,
    "Restoration of  the Emergency  Lighting Batteries  (XL245-B Emergency
    Battery System)," in the Bombardier BD-700 STLMC, as specified in  the
    applicable temporary revision identified in figure 1 to paragraph  (h)
    of this AD. The initial compliance time for doing task 33-51-54-603 is
    at the applicable  time specified in  paragraph (h)(1) or  (2) of this
    AD.  Repeat  task  33-51-54-603 thereafter  at the  interval specified
    within that task.

(1) If both ELBs were replaced  at the time of compliance  with  paragraph
    (g) of this AD: Within 48 months after the ELB replacement.

(2) If neither ELB or only one ELB, was replaced at the time of compliance
    with paragraph (g) of this AD:  Within 48 months  after the applicable
    compliance time specified in paragraph (h)(2)(i) or (ii) of this AD.

(i) For each ELB, use the battery replacement date, if it is indicated.

(ii) For each ELB, use the date of manufacture, if it does not have a bat-
     tery replacement date indicated.

                FIGURE 1 TO PARAGRAPH (H)  SERVICE INFORMATION           
    ______________________________________________________________________
    AIRPLANE SERIAL NUMBER                  TEMPORARY REVISION (TR)
    ______________________________________________________________________
    9002, 9003, 9011, 9016, 9020,           Bombardier Global Express
    9022 through 9025 inclusive,            BD-700 STLMC TR 05-19091701,
    9029, 9031, 9032, 9036, 9039            dated September 17, 2019
    through 9044 inclusive, 9046
    through 9058 inclusive, 9060
    through 9065 inclusive, 9067
    through 9081 inclusive, 9083
    through 9106 inclusive, 9108
    through 9122 inclusive, and 9124

    9125, 9126, 9128, 9129, 9133,           Bombardier Global Express
    9134, 9136 through 9139 inclusive,      BD-700 STLMC TR 05-19091704,
    9141 through 9148 inclusive, 9150,      dated September 17, 2019
    9151, and 9153

    9159, 9162, 9163, 9165, and 9169        Bombardier Global Express XRS
                                            BD-700 STLMC TR 05-19091705,
                                            dated September 17, 2019
    ______________________________________________________________________

(i) MISIDENTIFIED RESTORATION TASK

    The following temporary revisions  misidentified the required restora-
    tion task as task "33-51-54-602."

(1) Bombardier  Global  Express  XRS BD-700 STLMC  Temporary Revision  05-
    19032701, dated March 27, 2019.

(2) Bombardier Global Express BD-700 STLMC Temporary Revision 05-19040301,
    dated April 3, 2019.

(3) Bombardier Global Express BD-700 STLMC Temporary Revision 05-19040401,
    dated April 4, 2019.

(j) Compliance With Restoration Task for Airplanes on Which the Misidenti-
    fied Task Was Accomplished

    For airplanes  on which the restoration task specified as task "33-51-
    54-602" in the applicable temporary revision identified  in  paragraph
    (i) of this AD was done before the effective date of this AD:

(1) The actions specified in paragraph (g) of this AD are not required.

(2) The initial accomplishment of the task specified  in paragraphs (h)(1)
    and (2) of this AD is not required.

(3) Task 33-51-54-603 must be done  within 48 months after task "33-51-54-
    602" was accomplished,  and  thereafter  at the intervals specified in
    task 33-51-54-603.

(k) NO ALTERNATIVE ACTIONS AND INTERVALS

    After the existing maintenance or inspection program has been  revised
    as required by paragraph (h) of this AD, no alternative actions (e.g.,
    inspections)  and  intervals  may  be  used  unless  the  actions  and
    intervals are approved as  an alternative method of  compliance (AMOC)
    in accordance  with the  procedures specified  in paragraph  (l)(1) of
    this AD.

(l) 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
    local Flight  Standards District  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  local  flight  standards
    district office/certificate holding district 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's TCCA Design Approval  Organization (DAO). If approved  by
    the DAO, the approval must include the DAO-authorized signature.

(m) RELATED INFORMATION

(1) Refer   to   Mandatory  Continuing  Airworthiness  Information  (MCAI)
    Canadian AD CF-2020-07, dated March 17, 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-
    0843.

(2) For more information about this AD,  contact Thomas Niczky,  Aerospace
    Engineer, Avionics and Electrical Systems Section,  FAA,  New York ACO
    Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;  telephone
    516-228-7347; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

(3) For service information identified  in  this  AD,  contact Bombardier,
    Inc.,  400 Cote-Vertu Road West, Dorval, Quebec H4S 1Y9, Canada; tele-
    phone 514-855-5000;  fax 514-855-7401;  email thd.crj@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 September 10, 2020.  Lance T. Gant, Director,  Compliance & Air-
worthiness Division, Aircraft Certification Service.

DATES: The FAA must receive comments  on this proposed AD  by  November 2,
2020.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0843; Product Identifier 2020-NM-073-AD]
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 BD-700-1A10 airplanes. This
proposed AD was prompted by a report of smoke and signs of an
overheating condition from the emergency light battery (ELB) due to
excessive corrosion surrounding the internal lead acid batteries, which
caused an electrical short circuit that led to the smoke and
overheating condition. This proposed AD would require an inspection to
determine the last replacement date of the ELB, and replacement if
necessary. This proposed AD would also require the incorporation of a
new maintenance task into the aircraft maintenance schedule. 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 November 2,
2020.

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., 400 Cote-Vertu Road West, Dorval, Quebec
H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-7401; email
thd.crj@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-2020-0843;
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: Thomas Niczky, Aerospace Engineer,
Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600
Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7347;
fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

The FAA invites you to participate in this rulemaking by submitting
written comments, data, or views about this proposal. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. To
ensure the docket does not contain duplicate comments, commenters
should send only one copy of written comments, or if comments are filed
electronically, commenters should submit only one time. Send your
comments to an address listed under the ADDRESSES section. Include
"Docket No. FAA-2020-0843; Product Identifier 2020-NM-073-AD" at the
beginning of your 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, as well
as a report summarizing each substantive public contact with FAA
personnel concerning this proposed rulemaking. Before acting on this
proposal, the FAA will consider all comments received by the closing
date for comments. The FAA will consider comments filed after the
comment period has closed if it is possible to do so without incurring
expense or delay. The FAA may change this NPRM because of those
comments.

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 the
person identified in the FOR FURTHER INFORMATION CONTACT section. 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-2020-07, dated March
17, 2020 (referred to after this as the Mandatory Continuing
Airworthiness Information, or "the MCAI"), to correct an unsafe
condition for certain Bombardier, Inc., Model BD-700-1A10 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-2020-0843.

This proposed AD was prompted by a report of smoke and signs of an
overheating condition from the ELB due to excessive corrosion
surrounding the internal lead acid batteries, which caused an
electrical short circuit that led to the smoke and overheating
condition. The FAA is proposing this AD to address such conditions,
which could cause fire onboard the airplane. See the MCAI for
additional background information.

Related Service Information Under 1 CFR Part 51

Bombardier has issued Service Bulletin 700-33-024, dated May 13,
2019. This service information describes procedures for an inspection
to determine the last battery replacement date of the ELB, and
replacement if necessary.

Bombardier also issued following service information.

Supplemental Time Limits/Maintenance Checks (STLMC)
Temporary Revision (TR) 05-19091701, dated September 17, 2019.

STLMC TR 05-19091704, dated September 17, 2019.

STLMC TR 05-19091705, dated September 17, 2019.

These documents describe amendments to the aircraft maintenance
schedule for the ELB restoration and are distinct since they apply to
different airplane serial numbers.

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 our 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 accomplishing the actions specified
in Bombardier Service Bulletin 700-33-024, dated May 13, 2019,
described previously.

This proposed AD would also require the incorporation of a new
maintenance task into the aircraft maintenance schedule.

This proposed AD would require revisions to certain operator
maintenance documents to include new actions (e.g., inspections).
Compliance with these actions is required by 14 CFR 91.403(c). For
airplanes that have been previously modified, altered, or repaired in
the areas addressed by this proposed AD, the operator may not be able to
accomplish the actions described in the revisions. In this situation, to
comply with 14 CFR 91.403(c), the operator must request approval for an
alternative method of compliance according to paragraph (l)(1) of this
proposed AD.

Costs of Compliance

The FAA estimates that this proposed AD affects 69 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
3 work-hours x $85 per hour = $255
$11,308
$11,563
$797,847

The FAA has determined that revising the maintenance or inspection
program takes an average of 90 work-hours per operator, although the
FAA recognizes that this number may vary from operator to operator.
Since operators incorporate maintenance or inspection program changes
for their affected fleet(s), the FAA has determined that a per-operator
estimate is more accurate than a per-airplane estimate. Therefore, the
FAA estimates the total cost per operator to be $7,650 (90 work-hours x
$85 per work-hour).

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):