preamble attached >>>
ADs updated daily at www.Tdata.com
PROPOSED AD BOMBARDIER, INC.: Docket No. FAA-2021-0093; Project Identifier MCAI-2020-01213-T.
(a) COMMENTS DUE DATE

    The FAA must receive comments by April 12, 2021.

(b) AFFECTED AIRWORTHINESS DIRECTIVES (ADS)

    None.

(c) APPLICABILITY

    This AD applies to all Bombardier, Inc., Model BD-700-1A10 and BD-700-
    1A11 airplanes, certificated in any category.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 27, Flight controls.

(e) REASON

    This AD was  prompted by reports  indicating that the  left- and right
    -hand elevator torque  tube bearings were  contaminated with sand  and
    corrosion, restricting free  rotation. The FAA  is issuing this  AD to
    address sand contamination and  corrosion of the elevator  torque tube
    bearings, which could lead to binding or seizure of the bearings,  and
    potentially lead to a reduction in or loss of airplane  pitch control.

(f) COMPLIANCE

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

(g) INSPECTION AND CORRECTIVE ACTIONS

    Within 36  months from  the effective  date of  this AD  or within  63
    months from  the date  of airplane  manufacture, as  identified on the
    identification plate  of the  airplane, whichever  occurs later:  Do a
    general visual inspection of the left- and right-hand elevator  torque
    tube bearings for any sand,  dust, or corrosion; perform a  functional
    test of the elevator control system; and do all applicable  corrective
    actions;  in  accordance  with  the  Accomplishment  Instructions   of
    paragraphs 2.B., 2.C., and 2.D. of the applicable service  information
    specified  in  figure  1  to  paragraph  (g)  of  this  AD. Applicable
    corrective  actions must  be done  before further  flight. Repeat  the
    general visual inspection and functional test thereafter at  intervals
    not to exceed 63 months.

                                ILLUSTRATION
                FIGURE 1 TO PARAGRAPH (g) - SERVICE INFORMATION

(h) REPORTING REQUIREMENT

    At the applicable  time specified in  paragraph (h)(1) or  (2) of this
    AD, submit a report of all findings, positive and negative, of each of
    the first  three inspections  required by  paragraph (g)  of this  AD.
    Submit  the  report  to Bombardier,  in  accordance  with the  details
    specified in the applicable service information specified in  figure 1
    to paragraph (g) of this AD.

(1) If the inspection was done on or after the effective date of this  AD:
    Submit the report within 30 days after the inspection.

(2) If  the inspection  was done  before the  effective date  of this  AD:
    Submit the report within 30 days after the  effective date of this AD.

(i) CREDIT FOR PREVIOUS ACTIONS

    This paragraph provides credit  for actions required by  paragraph (g)
    of this AD, if those actions were performed before the effective  date
    of  this AD  using the  applicable service  information in  paragraphs
    (i)(1) through (6).

(1) Bombardier Service Bulletin 700-1A11-27-041, dated July 23, 2020.

(2) Bombardier Service Bulletin 700-27-083, dated July 23, 2020.

(3) Bombardier Service Bulletin 700-27-5012, dated July 23, 2020.

(4) Bombardier Service Bulletin 700-27-5503, dated July 23, 2020.

(5) Bombardier Service Bulletin 700-27-6012, dated July 23, 2020.

(6) Bombardier Service Bulletin 700-27-6503, dated July 23, 2020.

(j) 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.

(3) REPORTING REQUIREMENTS: A federal  agency may not conduct or  sponsor,
    and a  person is  not required  to respond  to, nor  shall a person be
    subject  to a  penalty for  failure to  comply with  a collection   of
    information subject to the requirements of the Paperwork Reduction Act
    unless that  collection of  information displays  a current  valid OMB
    Control Number. The OMB Control Number for this information collection
    is 2120-0056. Public reporting  for this collection of  information is
    estimated to be approximately 1 hour per response, including the  time
    for reviewing instructions, searching existing data sources, gathering
    and  maintaining the  data needed,  and completing  and reviewing  the
    collection  of  information.  All  responses  to  this  collection  of
    information  are  mandatory  as required  by  this  AD. Send  comments
    regarding this burden estimate or any other aspect of this  collection
    of  information, including  suggestions for  reducing this  burden  to
    Information   Collection    Clearance   Officer,    Federal   Aviation
    Administration, 10101 Hillwood Parkway, Fort Worth, TX 76177-1524.

(k) RELATED INFORMATION

(1) Refer to Mandatory Continuing Airworthiness Information (MCAI) TCCA AD
    CF-2020-29, dated August 21, 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-2021-0093.

(2) For more information about this AD, contact Siddeeq Bacchus, Aerospace
    Engineer, Mechanical Systems and Administrative Services Section, FAA,
    New York  ACO Branch,  1600 Stewart  Avenue, Suite  410, Westbury,  NY
    11590;  telephone  516-228-7362; 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
    http://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  February  9,  2021.  Lance  T.  Gant,  Director,  Compliance &
Airworthiness Division, Aircraft Certification Service.

DATES: The FAA must receive comments on this proposed AD by April 12, 2021
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


14 CFR Part 39

[Docket No. FAA-2021-0093; Project Identifier MCAI-2020-01213-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 all Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes.
This proposed AD was prompted by reports indicating that the left- and
right-hand elevator torque tube bearings were contaminated with sand
and corrosion, restricting free rotation. This proposed AD would
require repetitive general visual inspections of the left- and right-
hand elevator torque tube bearings for any sand, dust, or corrosion;
repetitive functional tests of the elevator control system; and
replacement of the elevator torque tube bearings if necessary. 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 April 12, 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 http://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-2021-
0093; 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.

FOR FURTHER INFORMATION CONTACT: Siddeeq Bacchus, Aerospace Engineer,
Mechanical Systems and Administrative Services Section, FAA, New York
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7362; 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 ADDRESSES. Include "Docket No. FAA-2021-0093; Project Identifier
MCAI-2020-01213-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
Siddeeq Bacchus, Aerospace Engineer, Mechanical Systems and
Administrative Services Section, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7362; 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.

Background


Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2020-29, dated August 21,
2020 (referred to after this as the Mandatory Continuing Airworthiness
Information, or the MCAI), to correct an unsafe condition for all
Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 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-2021-0093.

This proposed AD was prompted by reports indicating that the left-
and right-hand elevator torque tube bearings were contaminated with
sand and corrosion, restricting free rotation. The FAA is proposing
this AD to address sand contamination and corrosion of the elevator
torque tube bearings, which could lead to binding or seizure of the
bearings, and potentially lead to a reduction in or loss of airplane
pitch control. See the MCAI for additional background information.

Related Service Information Under 1 CFR Part 51


Bombardier has issued the following service information.

Bombardier Service Bulletin 700-1A11-27-041, Revision 1, dated December 7, 2020.
Bombardier Service Bulletin 700-27-083, Revision 1, dated December 7, 2020.
Bombardier Service Bulletin 700-27-5012, Revision 1, dated December 7, 2020.
Bombardier Service Bulletin 700-27-5503, Revision 1, dated December 7, 2020.
Bombardier Service Bulletin 700-27-6012, Revision 1, dated December 7, 2020.
Bombardier Service Bulletin 700-27-6503, Revision 1, dated December 7, 2020.

This service information describes procedures for repetitive
general visual inspections of the left- and right-hand elevator torque
tube bearings for any sand, dust, or corrosion; repetitive functional
tests of the elevator control system; and corrective actions including
replacement of the elevator torque tube bearings if necessary. These
documents are distinct since they apply to different airplane models
and 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 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 accomplishing the actions specified
in the service information described previously. This proposed AD also
would require sending the inspection results to Bombardier.

Costs of Compliance


The FAA estimates that this proposed AD affects 392 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
22 work-hours x $85 per hour = $1,870. Up to $4 (for four cotter pins) **.
Up to $1,874
Up to $734,608.

* Table does not include estimated costs for reporting.
** Parts cost include replacement parts where necessary.

The FAA estimates that it would take about 1 work-hour per product
to comply with the proposed reporting requirement in this proposed AD.
The average labor rate is $85 per hour. Based on these figures, the FAA
estimates the cost of reporting the inspection results on U.S.
operators to be $33,320, or $85 per product.

The FAA estimates the following costs to do any necessary on-
condition action that would be required based on the results of any
required actions. The FAA has no way of determining the number of
aircraft that might need this on-condition action:

Estimated Costs of On-Condition Actions

LABOR COST
PARTS COST
COST PER PRODUCT
5 work-hours x $85 per hour = $425 $271 (for four bearings).
$696

According to the manufacturer, some or all of the costs of this
proposed AD may be covered under warranty, thereby reducing the cost
impact on affected operators. The FAA does not control warranty
coverage for affected operators. As a result, the FAA has included all
known costs in the cost estimate.

Paperwork Reduction Act


A federal agency may not conduct or sponsor, and a person is not
required to respond to, nor shall a person be subject to penalty for
failure to comply with a collection of information subject to the
requirements of the Paperwork Reduction Act unless that collection of
information displays a current valid OMB control number. The control
number for the collection of information required by this proposed AD
is 2120-0056. The paperwork cost associated with this proposed AD has
been detailed in the Costs of Compliance section of this document and
includes time for reviewing instructions, as well as completing and
reviewing the collection of information. Therefore, all reporting
associated with this proposed AD is mandatory. Comments concerning the
accuracy of this burden and suggestions for reducing the burden should
be directed to Information Collection Clearance Officer, Federal
Aviation Administration, 10101 Hillwood Parkway, Fort Worth, TX 76177-1524.

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: