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2018-20-17 BOMBARDIER, INC.: Amendment 39-19451; Docket No. FAA-2018-0587; Product Identifier 2018-NM-054-AD.
(a) EFFECTIVE DATE

    This AD is effective November 20, 2018.

(b) AFFECTED ADS

    This  AD  replaces  AD  2012-22-10,  Amendment 39-17246  (77 FR 67267,
    November 9, 2012) ("AD 2012-22-10").

(c) APPLICABILITY

    This AD applies to the airplanes identified  in paragraphs (c)(1), (c)
    (2), and (c)(3) of this AD, certificated in any category.

(1) Bombardier, Inc.,  Model CL-600-2C10  (Regional Jet Series 700, 701, &
    702) airplanes, serial numbers 10002 and subsequent.

(2) Bombardier, Inc, Model CL-600-2D15 (Regional Jet Series 705) airplanes
    and  Model  CL-600-2D24  (Regional Jet Series 900)  airplanes,  serial
    numbers 15001 and subsequent.

(3) Bombardier, Inc.,  Model CL-600-2E25  (Regional Jet Series 1000)  air-
    planes, serial numbers 19001 and subsequent.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 57, Wings.

(e) REASON

    This AD was prompted by a report that certain wing-to-fuselage attach-
    ment nuts do not conform to the certification design requirements  for
    dual locking features, and a determination that additional nuts of the
    forward  keel  beam attachment  joint  should be  inspected,  and that
    repetitive inspections of  certain wing-to-fuselage attachment  joints
    are not necessary. We are issuing this AD to address loss of the  wing
    -to-fuselage  attachment joints,  which could  result in  loss of  the
    wing, and consequent reduced, or complete loss of, controllability  of
    the airplane.

(f) COMPLIANCE

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

(g) INITIAL INSPECTION OF THE WING-TO-FUSELAGE ATTACHMENT JOINT

    For airplanes identified in  paragraphs (g)(1), (g)(2), and  (g)(3) of
    this AD:  Within 3,000  flight hours  or 18  months, whichever  occurs
    first after December 14, 2012  (the effective date of AD  2012-22-10),
    perform a  detailed inspection  for missing  or failed  cotter pins at
    each affected  wing-to-fuselage attachment  joint, in  accordance with
    Part A through Part C of the Accomplishment Instructions of Bombardier
    Service Bulletin 670BA-53-042, Revision B, dated October 20, 2017.

(1) Bombardier, Inc.,  Model CL-600-2C10  (Regional Jet Series 700, 701, &
    702) airplanes, serial numbers 10002 through 10337 inclusive.

(2) Bombardier, Inc, Model CL-600-2D15 (Regional Jet Series 705) airplanes
    and  Model  CL-600-2D24  (Regional Jet Series 900)  airplanes,  serial
    numbers 15001 through 15299 inclusive.

(3) Bombardier, Inc.,  Model CL-600-2E25  (Regional Jet Series 1000)  air-
    planes, serial numbers 19001 through 19037 inclusive.

(h) INITIAL AND REPETITIVE INSPECTIONS OF THE ATTACHMENT NUTS  AT THE FOR-
    WARD KEEL BEAM ATTACHMENT JOINT

    Within the compliance time specified  in figure 1 to paragraph  (h) of
    this AD: Perform a detailed  inspection of the attachment nuts  at the
    forward keel beam attachment joint for missing or failed cotter  pins,
    in  accordance  with  Part D  of  the  Accomplishment Instructions  of
    Bombardier Service  Bulletin 670BA-53-042,  Revision B,  dated October
    20, 2017. Repeat the inspection thereafter at intervals not to  exceed
    8,800 flight hours,  in accordance with  Part E of  the Accomplishment
    Instructions of Bombardier Service Bulletin 670BA-53-042,  Revision B,
    dated October 20, 2017.

                   FIGURE 1 TO PARAGRAPH (H) OF THIS AD –                 
     COMPLIANCE TIME FOR INITIAL INSPECTION OF ATTACHMENT NUTS AT FORWARD 
                          KEEL BEAM ATTACHMENT JOINT                      
    ______________________________________________________________________
    AIRPLANE MODEL AND SERIAL
    NUMBERS (S/NS)                            COMPLIANCE TIME
    ______________________________________________________________________
    Model CL-600-2C10                  Within 3,000 flight hours or 18
    S/Ns 10002 through 10337           months, whichever occurs first
    inclusive                          after December 14, 2012 (the
                                       effective date of AD 2012-22-10)

    Model CL-600-2C10
    S/Ns 10338 and subsequent
    Model CL-600-2D15 and              Within 8,800 flight hours after
    CL-600-2D24                        the effective date of this AD
    S/Ns 15001 and subsequent
    Model CL-600-2E25
    S/Ns 19001 and subsequent
    ______________________________________________________________________

(i) CORRECTIVE ACTION

    If any cotter pin is found missing or failed during any inspection re-
    quired by this AD: Before further flight, replace the cotter pin 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.

(j) CREDIT FOR PREVIOUS ACTIONS

    This paragraph provides credit for the inspections required  by  para-
    graphs (g) and (h) of this AD,  if the inspection was performed before
    the effective date of this AD, using Bombardier Service Bulletin 670BA
    -53-042, dated December 21, 2011; or Bombardier Service Bulletin 670BA
    -53-042, Revision A, dated April 27, 2012.

(k) OTHER FAA AD PROVISIONS

(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,  New York
    11590; telephone: 516-228-7300; fax: 516-794-5531.

(i) Before using any approved AMOC,  notify your appropriate principal in-
    spector,  or  lacking a principal inspector,  the manager of the local
    flight standards district office/certificate holding district office.

(ii) AMOCs approved previously for AD 2012-22-10,  are  approved  as AMOCs
     for the corresponding provisions  in  paragraphs (g)  and (h) of this
     AD.

(2) Contacting the Manufacturer:  For any requirement in this AD to obtain
    corrective  actions   from  a   manufacturer,  the   action  must   be
    accomplished using  a method  approved by  the Manager,  New York  ACO
    Branch, FAA; or TCCA; or  Bombardier, Inc.'s TCCA DAO. If  approved by
    the DAO, the approval must include the DAO-authorized signature.

(l) RELATED INFORMATION

(1) Refer   to   Mandatory  Continuing  Airworthiness  Information  (MCAI)
    Canadian AD CF-2012-10R1, dated January 22, 2018, for related informa-
    tion. This MCAI may be found in the AD docket on the internet at http:
    //www.regulations.gov by searching for  and  locating  Docket No. FAA-
    2018-0587.

(2) For more information about this AD,  contact Andrea Jimenez, Aerospace
    Engineer,  Airframe and Mechanical Systems Section,  FAA, New York ACO
    Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;  telephone
    516-228-7330; fax 516-794-5531.

(3) Service information  identified in this AD that is not incorporated by
    reference is available at the addresses specified in paragraphs (m)(3)
    and (m)(4) of this AD.

(m) MATERIAL INCORPORATED BY REFERENCE

(1) The Director of the Federal Register  approved  the  incorporation  by
    reference (IBR) of  the service information  listed in this  paragraph
    under 5 U.S.C. 552(a) and 1 CFR part 51.

(2) You must use  this service information as applicable to do the actions
    required by this AD, unless this AD specifies otherwise.

(i) Bombardier Service Bulletin 670BA-53-042 Revision B, dated October 20,
    2017.

(ii) Reserved.

(3) For  service information identified  in this AD,  contact  Bombardier,
    Inc., 400 Cote-Vertu Road West, Dorval, Quebec H4S 1Y9, Canada;  Wide-
    body Customer Response Center North America toll-free telephone 1-866-
    538-1247 or  direct-dial telephone 514-855-5000;  fax 514-855-7401; e-
    mail ac.yul@aero.bombardier.com; internet http://www.bombardier.com.

(4) You may view this service information at the FAA,  Transport Standards
    Branch, 2200 South 216th St.,  Des Moines, WA.  For information on the
    availability of this material at the FAA, call 206-231-3195.

(5) You  may  view  this  service  information  that  is  incorporated  by
    reference at the National Archives and Records Administration  (NARA).
    For information on the availability of this material at NARA, call 202
    -741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-
    locations.html.

Issued in Des Moines, Washington, on September 25, 2018.  John P. Piccola,
Acting  Director,  System   Oversight  Division,  Aircraft   Certification
Service.

FOR FURTHER INFORMATION CONTACT: Andrea Jimenez, Aerospace Engineer,  Air-
frame and Mechanical Systems Section,  FAA,  New  York  ACO  Branch,  1600
Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7330; fax
516-794-5531.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0587; Product Identifier 2018-NM-054-AD; Amendment
39-19451; AD 2018-20-17]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: We are superseding Airworthiness Directive (AD) 2012-22-10,
which applied to certain Bombardier, Inc., Model CL-600-2C10 (Regional
Jet Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet
Series 705) airplanes, Model CL-600-2D24 (Regional Jet Series 900)
airplanes, and Model CL-600-2E25 (Regional Jet Series 1000) airplanes.
AD 2012-22-10 required repetitive inspections to determine that cotter
pins are installed at affected wing-to-fuselage attachment joints and
replacement if necessary. This AD retains the initial inspection of the
wing-to-fuselage attachment joints, and removes the repetitive
inspections of all but the forward keel beam attachment joint. This AD
also changes the repetitive inspection interval for the forward keel
beam attachment joint. This AD was prompted by a determination that
additional nuts of the forward keel beam attachment joint should be
inspected, and that repetitive inspections of certain wing-to-fuselage
attachment joints are not necessary. We are issuing this AD to address
the unsafe condition on these products.

DATES: This AD is effective November 20, 2018.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of November 20,
2018.

ADDRESSES: For service information identified in this final rule,
contact Bombardier, Inc., 400 Cote-Vertu Road West, Dorval,
Quebec H4S 1Y9, Canada; Widebody Customer Response Center North
America toll-free telephone 1-866-538-1247 or direct-dial telephone
514-855-5000; fax 514-855-7401; email ac.yul@aero.bombardier.com;
internet http://www.bombardier.com. You may view this referenced
service information at the FAA, Transport Standards Branch, 2200 South
216th St., Des Moines, WA. For information on the availability of this
material at the FAA, call 206-231-3195. It is also available on the
internet at http://www.regulations.gov by searching for and locating
Docket No. FAA-2018-0587.

Examining the AD Docket

You may examine the AD docket on the internet at http://www.regulations.
gov by searching for and locating Docket No. FAA-2018-
0587; 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 final rule, the regulatory evaluation, any comments received, and
other information. The address for Docket Operations (phone: 800-647-5527) is
U.S. Department of Transportation, Docket Operations, M-30, West
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE,
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Andrea Jimenez, Aerospace Engineer,
Airframe and Mechanical Systems Section, FAA, New York ACO Branch, 1600
Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7330;
fax 516-794-5531.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to supersede AD 2012-22-10, Amendment 39-17246 (77 FR 67267,
November 9, 2012) (``AD 2012-22-10''). AD 2012-22-10 applied to certain
Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701, &
702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes,
Model CL-600-2D24 (Regional Jet Series 900) airplanes, and Model CL-
600-2E25 (Regional Jet Series 1000) airplanes. The NPRM published in
the Federal Register on July 9, 2018 (83 FR 31705). The NPRM was
prompted by a determination that additional nuts of the forward keel
beam attachment joint should be inspected, and that repetitive
inspections of certain wing-to-fuselage attachment joints are not
necessary. The NPRM proposed to retain the initial inspection of the
wing-to-fuselage attachment joints, and remove the repetitive
inspections of all but the forward keel beam attachment joint. The NPRM
also proposed to change the repetitive inspection interval for the
forward keel beam attachment joint. We are issuing this AD to address
loss of the wing-to-fuselage attachment joints, which could result in
loss of the wing, and consequent reduced, or complete loss of,
controllability of the airplane.
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2012-10R1, dated
January 22, 2018 (referred to after this as the Mandatory Continuing
Airworthiness Information, or ``the MCAI''), to correct an unsafe
condition for certain Bombardier, Inc., Model CL-600-2C10 (Regional Jet
Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet
Series 705) airplanes, Model CL-600-2D24 (Regional Jet Series 900)
airplanes, and Model CL-600-2E25 (Regional Jet Series 1000) airplanes.
The MCAI states:

The manufacturer has determined that wing-to-fuselage attachment
nuts, part number (P/N) SH670-35635-1, SH670-35440-951, SH670-35440-
3, SH670-35635-1, and 95136D-2412, installed at six attachment joint
locations, do not conform to the certification design requirements
for dual locking features. The nuts are not of the self-locking type
as required and do not provide the frictional thread interference
required to prevent the nut from backing off the bolt. As a result,
only a single locking device, the cotter pin, is provided at these
critical joints. In the case where a nut becomes loose, in
combination with a missing or broken cotter pin, the attachment bolt
at the wing-to-fuselage joint could migrate and fall out. Loss of
two attachment joints could potentially result in the loss of the
wing.
The original version of this [Canadian] AD [which corresponds to
FAA AD 2012-22-10] mandated initial and repeat detailed visual
inspections (DVIs) of each affected wing-to-fuselage attachment
joint to ensure that a cotter pin was installed.
Design review and analysis of the inspection findings since the
original issue of this [Canadian] AD have led us to determine that
additional nuts at the forward keel beam joint should also be
included in the inspection and that the repetitive inspection of
some wing-to-fuselage attachment joints is not required. This
[Canadian] AD maintains the initial inspection requirements [for
missing or failed (. . .) cotter pins] for six attachment joint
locations, and removes the repetitive inspection requirements for
all but the forward keel beam attachment joint. This [Canadian] AD
also requires a different repetitive inspection interval, and the
[Canadian] AD applicability has been changed for the initial
inspection to account for changes made in production.

You may examine the MCAI in the AD docket on the internet at http://
www.regulations.gov by searching for and locating Docket No. FAA-2018-
0587.

Comments

We gave the public the opportunity to participate in developing
this final rule. We have considered the comment received. The Air Line
Pilots Association, International (ALPA) reviewed and expressed support
for the NPRM.

Clarification of Credit Paragraph

We have removed paragraph (j)(2) of the proposed AD and
redesignated paragraph (j)(1) of the proposed AD as paragraph (j) of
this AD because the airplanes identified in paragraph (j)(2) of the
proposed AD are included in paragraph (j)(1) of the proposed AD. We
have also clarified in paragraph (j) of this AD that any previous
inspection done using earlier revisions of the service information is
acceptable.

Conclusion

We reviewed the relevant data, considered the comment received, and
determined that air safety and the public interest require adopting
this final rule with the changes described previously and minor
editorial changes. We have determined that these minor changes:
Are consistent with the intent that was proposed in the
NPRM for addressing the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.
We also determined that these changes will not increase the
economic burden on any operator or increase the scope of this final
rule.

Related Service Information Under 1 CFR Part 51

Bombardier, Inc. has issued Service Bulletin 670BA-53-042, Revision
B, dated October 20, 2017. This service information describes
procedures for detailed inspections of the wing-to-fuselage attachment
joints, and of the attachment nuts at the forward keel beam attachment
joint for missing or failed cotter pins. 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.

Costs of Compliance


We estimate that this AD affects 274 airplanes of U.S. registry. We
estimate the following costs to comply with this AD:

Estimated Costs for Required Actions

Labor cost
Parts cost
Cost per product
Cost on U.S. operators
11 work-hours x $85 per hour = $935
$100
$1,035
$283,590

We have received no definitive data that would enable us to provide
cost estimates for the on-condition actions specified in this AD. We
have no way of determining the number of aircraft that may need these
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.
We are 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.
This AD is issued in accordance with authority delegated by the
Executive Director, Aircraft Certification Service, as authorized by
FAA Order 8000.51C. In accordance with that order, issuance of ADs is
normally a function of the Compliance and Airworthiness Division, but
during this transition period, the Executive Director has delegated the
authority to issue ADs applicable to transport category airplanes and
associated appliances to the Director of the System Oversight Division.

Regulatory Findings

We determined that this AD will not have federalism implications
under Executive Order 13132. This AD will 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 that this AD:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979);
3. Will not affect intrastate aviation in Alaska; and
4. 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.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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 removing Airworthiness Directive (AD)
2012-22-10, Amendment 39-17246 (77 FR 67267, November 9, 2012), and
adding the following new AD: