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2018-22-12 BOMBARDIER, INC: Amendment 39-19485; Docket No. FAA-2018-0551; Product Identifier 2018-NM-023-AD.
(a) EFFECTIVE DATE

    This AD is effective December 12, 2018.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies  to Bombardier, Inc.,  Model CL-600-2C10 (Regional Jet
    Series 700, 701 & 702) airplanes, serial numbers 10002 and subsequent;
    Model CL-600-2D15 (Regional Jet Series 705) airplanes and Model CL-600
    -2D24 (Regional Jet Series 900) airplanes,  serial numbers  15001  and
    subsequent and Model CL-600-2E25 (Regional Jet Series 1000) airplanes,
    serial numbers 19001 and subsequent; certificated in any category.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 32, Landing gear.

(e) REASON

    This AD was  prompted by reports  of damage to  the protective coating
    and corrosion found on the piston/axle of the main landing gear (MLG),
    caused by friction between the inboard axle sleeve and the axle thrust
    face. We are issuing this AD to address such damage, which could cause
    the axle  to separate  from the  piston/axle, and  ultimately lead  to
    collapse of the landing gear during ground maneuvers or upon landing.

(f) COMPLIANCE

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

(g) MAINTENANCE OR INSPECTION PROGRAM REVISION

    Within  30  days after  the  effective date  of  this AD:  Revise  the
    maintenance or inspection program, as applicable, by incorporating CRJ
    Series Regional Jet Temporary Revision (TR) MRB-0059,  dated March 20,
    2015.  The  applicable  maintenance  or  inspection  program  revision
    required by  this paragraph  may be  done by  inserting a  copy of CRJ
    Series  Regional  Jet TR  MRB-0059,  dated March  20,  2015, into  the
    maintenance requirements  manual (MRM).  When the  information in  CRJ
    Series  Regional  Jet TR  MRB-0059,  dated  March 20, 2015,  has  been
    included in the  general revisions of  the MRM, the  general revisions
    may be inserted in the MRM,  and this TR may be removed,  provided the
    relevant information in the general  revision is identical to that  in
    CRJ Series Regional Jet TR MRB-0059, dated March 20, 2015. The initial
    time for the task is at  the applicable time specified in figure  1 to
    paragraphs (g) and  (h) of this  AD. Information used  for determining
    the entry into service date can be found in paragraph (h) of this AD.

       FIGURE 1 TO PARAGRAPHS (G) AND (H) OF THIS AD  COMPLIANCE TIME    
                                                       REQUIREMENTS       
    ______________________________________________________________________
    TIME SINCE PISTON/AXLE                    COMPLIANCE TIME TO PERFORM
    ENTRY INTO SERVICE                        INITIAL INSPECTION TASK
    ______________________________________________________________________
    More than 48 months since entry           Within 12 months from the
    into service, as of the effective         effective date of this AD
    date of this AD

    More than 24 months but less than         Within 24 months from the
    or equal to 48 months since entry         effective date of this AD
    into service, as of the effective         but before reaching 60
    date of this AD                           months total piston/axle
                                              time in-service

    Less than or equal to 24 months           Within 36 months from the
    since entry into service, as of           effective date of this AD
    the effective date of this AD             but before reaching 48
                                              months total piston/axle
                                              time in-service
    ______________________________________________________________________


(h) INFORMATION FOR CALCULATING TIME SINCE PISTON/AXLE ENTRY  INTO SERVICE
    DATE

    The entry into  service date (first  column of figure  1 to paragraphs
    (g) and (h) of this AD) can be calculated from the date of the  latest
    inspection, restoration,  or repair  accomplished as  specified in the
    service information listed in paragraphs (h)(1) through (h)(3) of this
    AD, as applicable.

(1) Inspected  as  specified  in  one of the following  Bombardier Service
    Bulletins specified in paragraphs (h)(1)(i) through (h)(1)(iv) of this
    AD.

(i) Bombardier Service Bulletin 670BA-32-048, dated August 29, 2014.

(ii) Bombardier Service Bulletin 670BA-32-048, Revision A, dated September
    5, 2014.

(iii) Bombardier Service Bulletin 670BA-32-048, Revision B dated September
      2, 2015.

(iv) Bombardier Service Bulletin 670BA-32-048, Revision C,  dated July 11,
     2018.

(2) Restored  as  specified  in  Bombardier Task Number 320100-210, of the
    Bombardier CRJ Series Regional Jet MRM, Part 1, CSP B-053.

(3) Repaired  as  specified  in  one  or  more  of  the  Bombardier repair
    engineering orders (REO) specified in paragraphs (h)(3)(i) through (h)
    (3)(v) of this AD.

(i) Bombardier REO 670-32-11-313, Revision A, dated March 18, 2014.

(ii) Bombardier REO 670-32-11-361, dated July 30, 2014.

(iii) Bombardier REO 670-32-11-361, Revision A, dated May 31, 2018.

(iv) Bombardier REO 698-32-11-008, dated July 30, 2014.

(v) Bombardier REO 698-32-11-008, Revision A, dated May 31, 2018.

(i) NO ALTERNATIVE ACTIONS OR INTERVALS

    After the maintenance or inspection program has been revised,  as  re-
    quired by paragraph (g) of this AD,  no alternative actions (e.g., in-
    spections) or intervals  may be used  unless the actions  or intervals
    are  approved  as  an  alternative  method  of  compliance  (AMOC)  in
    accordance with the procedures  specified in paragraph (j)(1)  of this
    AD.

(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
    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
    corrective  actions   from  a   manufacturer,  the   action  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.

(k) RELATED INFORMATION

(1) Refer   to   Mandatory  Continuing  Airworthiness  Information  (MCAI)
    Canadian AD CF-2017-38, dated December 20, 2017,  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-
    2018-0551.

(2) For more information about this AD, contact Darren Gassetto, Aerospace
    Engineer, Mechanical Systems and Administrative Services Section, FAA,
    New York ACO Branch, 1600 Stewart Ave., Suite 410, Westbury, NY 11590;
    telephone 516-228-7323;fax 516-794-5531;email 9-avs-nyaco-cos@faa.gov.

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

(l) 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) CRJ Series Regional Jet Temporary Revision (TR) MRB-0059,  dated March
    20, 2015.

(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 1-514-855-2999; 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 October 25, 2018.  Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification Service

FOR FURTHER INFORMATION CONTACT:  Darren  Gassetto,   Aerospace  Engineer,
Mechanical Systems and Administrative Services Section,  FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-
228-7323; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0551; Product Identifier 2018-NM-023-AD; Amendment
39-19485; AD 2018-22-12]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc. Airplanes

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

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) 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. This AD was prompted by
reports of damage to the protective coating and corrosion on the
piston/axle of the main landing gear (MLG), caused by friction between
the inboard axle sleeve and the axle thrust face. This AD requires
revising the maintenance or inspection program, as applicable, to
incorporate a detailed inspection of the MLG piston/axle for damage to
the protective coating and for corrosion. We are issuing this AD to
address the unsafe condition on these products.

DATES: This AD is effective December 12, 2018.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of December 12,
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 1-
514-855-2999; fax 514-855-7401; email ac.yul@aero.bombardier.com;
internet http://www.bombardier.com. 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. It is also available on the
internet at http://www.regulations.gov by searching for and locating
Docket No. FAA-2018-0551.

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-
0551; 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: Darren Gassetto, Aerospace Engineer,
Mechanical Systems and Administrative Services Section, FAA, New York
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7323; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 by adding an AD that would apply 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 6, 2018 (83 FR 31504). The NPRM was prompted by
reports of damage to the protective coating and corrosion on the
piston/axle of the MLG, caused by friction between the inboard axle
sleeve and the axle thrust face. The NPRM proposed to require revising
the maintenance or inspection program, as applicable, to incorporate a
detailed inspection of the MLG piston/axle for damage to the protective
coating and for corrosion.
We are issuing this AD to address damage to the protective coating
and corrosion found on the piston/axle of the MLG, caused by friction
between the inboard axle sleeve and the axle thrust face, which could
cause the axle to separate from the piston/axle, and ultimately lead to
collapse of the landing gear during ground maneuvers or upon landing.
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2017-38, dated December
20, 2017 (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:

There have been reports of damage to the protective coating and/
or corrosion on the piston/axle of the Main Landing Gear (MLG). The
damage to the protective coating was caused by friction between the
inboard axle sleeve and the axle thrust face. If not corrected, this
condition can cause the axle to separate from the piston/axle [and
consequent collapse of the landing gear during ground maneuvers or
upon landing].
This [Canadian] AD mandates the incorporation of a new
maintenance task in order to perform a [detailed] visual inspection
of the piston/axle of the MLG to prevent the axle separation from
the piston/axle.

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-
0551.

Comments

We gave the public the opportunity to participate in developing
this final rule. The following presents the comments received on the
NPRM and the FAA's response to each comment.

Support for the NPRM

The Air Line Pilots Association, International and Endeavor Air
stated their support for the proposed AD.

Request To Refer to Certain Revised Service Information

Endeavor Air noted that Bombardier, Inc. has issued certain revised
service information and requested that the proposed AD be updated to
reference the revised service information.
We agree with the commenter's request. We have determined the
revised service information should be referenced in regards to
calculating the time since piston/axle entry into service, since
operators might have done the latest inspection, restoration, or repair
using the revised service information. We have updated paragraph (h) of
this AD to refer to the revised service information and reorganized
paragraph (h) of this AD for consistency.

Conclusion

We reviewed the relevant data, considered the comments 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 CRJ Series Regional Jet Temporary
Revision (TR) MRB-0059, dated March 20, 2015. The service information
describes an airworthiness limitation task for a detailed inspection
for damage to the protective coating and for corrosion on the piston/
axle of the MLG. 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 530 airplanes of U.S. registry. We
estimate the following costs to comply with this AD:
We have determined that revising the maintenance or inspection
program takes an average of 90 work-hours per operator, although we
recognize that this number may vary from operator to operator. In the
past, we have estimated that this action takes 1 work-hour per
airplane. Since operators incorporate maintenance or inspection program
changes for their affected fleet(s), we have determined that a per-
operator estimate is more accurate than a per-airplane estimate.
Therefore, we estimate 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.
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

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 adding the following new airworthiness
directive (AD):