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2020-02-19 BOMBARDIER, INC.: Amendment 39-19831; Docket No. FAA-2019-0720; Product Identifier 2019-NM-117-AD.
(a) EFFECTIVE DATE

    This AD is effective March 18, 2020.

(b) AFFECTED ADS

    This AD replaces  AD 2003-09-04 R1,  Amendment 39-13305  (68 FR 54985,
    September 22, 2003) ("AD 2003-09-04 R1").

(c) APPLICABILITY

    This AD applies to Bombardier, Inc.,  Model CL-600-2B19  (Regional Jet
    series 100 & 440) airplanes,  certificated  in  any  category,  serial
    numbers 7003 through 8999 inclusive.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 53, Fuselage.

(e) REASON

    This AD was prompted  by a report of fatigue cracks occurring  on  the
    pressure floor skin at fuselage stations (FS) 460 and 513.  The FAA is
    issuing this AD to address such fatigue cracks,  which could result in
    failure of the pressure floor skin and consequent rapid  decompression
    of the airplane during flight.

(f) COMPLIANCE

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

(g) MAINTENANCE PROGRAM REVISION FOR SERIAL NUMBERS 7003 THROUGH 8079

    For  airplane  serial numbers  7003 through 8079 inclusive:  Within 30
    days from the effective date this AD,  revise the existing maintenance
    or inspection program, as applicable, by incorporating the information
    specified  in  Airworthiness Limitations  (AWL)  task number 53-41-149
    specified   in   Bombardier  CL-600-2B19   Airworthiness  Requirements
    Temporary Revision 2B-2265, dated July 19, 2018,  to Appendix B - Air-
    worthiness Limitations,  of  Part 2  of the Bombardier Maintenance Re-
    quirements Manual.

(1) The initial compliance time  for doing the task is  at the time speci-
    fied in figure 1  to paragraph (g)(1)  of this AD,  or  within 90 days
    after the effective date of this AD, whichever occurs later.

          FIGURE 1 TO PARAGRAPH (G)(1)  INITIAL INSPECTION PHASE-IN      
    ______________________________________________________________________
      TOTAL FLIGHT CYCLES (FC)
      ACCUMULATED AS OF OCTOBER
      7, 2003 (THE EFFECTIVE                 COMPLIANCE SCHEDULE FOR
      DATE OF AD 2003-09-04 R1)              INITIAL INSPECTION
    ______________________________________________________________________
    8,000 FC or less                   Prior to exceeding 10,000 total FC

    More than 8,000 FC but less        Within 2,000 FC from October 7,
    than 10,000 FC                     2003 (the effective date of FAA AD
                                       2003-09-04 R1)

    10,000 FC or more but less         Within 1,500 FC from October 7,
    than 15,000 FC                     2003 (the effective date of FAA AD
                                       2003-09-04 R1)

    15,000 FC or more but less         Within 1,000 FC from the effective
    than 17,325 FC                     date of October 7, 2003 (the effec-
                                       tive date of FAA AD 2003-09-04 R1)

    17,325 FC or more but less         Prior to exceeding 18,325 total FC
    than 18,325 FC

    18,325 FC or more                  Not required if the initial inspec-
                                       tion has already been performed in
                                       accordance with AWL Task number
                                       53-41-149
    ______________________________________________________________________

(2) For  airplanes  on  which  Bombardier  Service  Bulletin  601R-53-067,
    Bombardier Service Bulletin 601R-53-077, and AWL task number 53-41-194
    have been done,  the inspections  in AWL task number 53-41-149 are not
    required in the areas covered by doublers at FS460 and FS513.

(3) For airplanes on which the initial inspection has been accomplished at
    18,325 or more total flight cycles,  and  no cracks were found,  as of
    October 7, 2003 (the effective date of AD 2003-09-04),  the repetitive
    interval of 10,000 flight cycles starts  from  the  completion date of
    the initial inspection.

(4) For airplanes that were previously inspected using AWL task number 53-
    41-193,  perform an inspection using the information specified  in AWL
    task number 53-41-149,  provided in Bombardier CL-600-2B19  Airworthi-
    ness Requirements Temporary Revision 2B-2265,  dated July 19, 2018, to
    Appendix B - Airworthiness Limitations,  of  Part 2  of the Bombardier
    Maintenance Requirements Manual,  within 10,000 flight cycles from the
    previously accomplished inspection.

(h) MAINTENANCE PROGRAM REVISION FOR SERIAL NUMBERS 8080 THROUGH 8999

(1) For  airplane  serial numbers  8080 through 8999 inclusive:  Within 30
    days from the effective date of this AD,  revise  the existing mainte-
    nance or inspection program,  as applicable,  by incorporating the in-
    formation  specified   in  AWL  task  number  53-41-193  specified  in
    Bombardier CL-600-2B19  Airworthiness  Limitations  Temporary Revision
    2B-2266,  dated  July 19, 2018,  to Appendix B - Airworthiness Limita-
    tions,  of Part 2  of the Bombardier  Maintenance Requirements Manual.
    Except as specified  in paragraph (h)(2) of this AD,  the initial com-
    pliance time for doing the task is at the time specified in Bombardier
    CL-600-2B19  Airworthiness  Requirements  Temporary Revision  2B-2266,
    dated  July 19, 2018,  to  Appendix B - Airworthiness Limitations,  of
    Part 2 of the Bombardier Maintenance Requirements Manual, or within 90
    days after the effective date of this AD, whichever occurs later.

(2) For  airplanes  that  were  previously inspected using AWL task number
    53-41-149,  perform  an  inspection  by incorporating  the information
    specified in AWL task number 53-41-193, provided in Bombardier CL-600-
    2B19 Airworthiness Requirements Temporary Revision 2B-2265, dated July
    19, 2018,  to Appendix B - Airworthiness Limitations, of Part 2 of the
    Bombardier Maintenance Requirements Manual, within 10,000 flight
    cycles from the previously accomplished inspection.

(i) CORRECTIVE ACTIONS

    If  any  crack  is  found  during  any inspection required by this AD,
    before further flight,  repair 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),  and
    accomplish any repair instructions,  including  any  new airworthiness
    limitations and inspection requirements accordingly.  If  approved  by
    the DAO, the approval must include the DAO-authorized signature.

(j) NO ALTERNATIVE ACTIONS OR INTERVALS

    After the maintenance  or  inspection program  has been revised as re-
    quired by paragraphs (g), (h), and (i) of this AD,  as applicable,  no
    alternative actions (e.g., inspections)  or  intervals may be used un-
    less the actions  or  intervals are approved as an AMOC  in accordance
    with the procedures specified in paragraph (k)(1) of this AD.

(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, NY  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 2003-09-04 R1 are approved  as AMOCs
     for the corresponding provisions of this AD.

(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 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-2002-39R2, dated August 15, 2019,  for related informa-
    tion.  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-2019-0720.

(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; email 9-avs-nyaco-cos@faa.gov.

(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 CL-600-2B19 Maintenance Requirements Temporary Revision 2B-
    2265, dated July 19, 2018,  to Appendix B - Airworthiness Limitations,
    of Part 2 of the Bombardier Maintenance Requirements Manual.

(ii) Bombardier CL-600-2B19  Maintenance Requirements  Temporary  Revision
     2B-2266,  dated July 19, 2018,  to Appendix B - Airworthiness Limita-
     tions, of Part 2 of the Bombardier Maintenance Requirements Manual.

(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 https://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,  email
    fedreg.legal@nara.gov,  or  go  to:  https://www.archives.gov/federal-
    register/cfr/ibr-locations.html.

Issued  on  January 27, 2020.  Gaetano A. Sciortino,  Deputy  Director for
Strategic Initiatives,  Compliance & Airworthiness Division, Aircraft Cer-
tification 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; email 9-avs-nyaco-cos@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0720; Product Identifier 2019-NM-117-AD; Amendment
39-19831; AD 2020-02-19]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

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

ACTION: Final rule.

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

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2003-09-04
R1, which applied to certain Bombardier, Inc., Model CL-600-2B19
(Regional Jet series 100 & 440) airplanes. AD 2003-09-04 R1 required
revising the airworthiness limitations for certain structural
inspections; repair if necessary; and submission of inspection findings
to the airplane manufacturer. This AD revises the applicability to
include additional airplanes; revises certain compliance times; and
requires revising the existing maintenance or inspection program, as
applicable, to incorporate new or more restrictive airworthiness
limitations. This AD was prompted by a report of fatigue cracks
occurring on the pressure floor skin at fuselage stations (FS) 460 and
513. The FAA is issuing this AD to address the unsafe condition on
these products.

DATES: This AD is effective March 18, 2020.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of March 18,
2020.

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 https://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 https://www.regulations.gov by searching for and locating
Docket No. FAA-2019-0720.

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-2019-
0720; 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 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; email 9-avs-nyaco-cos@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2002-39R2, dated August
15, 2019 (also referred to as the Mandatory Continuing Airworthiness
Information, or ``the MCAI''), to correct an unsafe condition for
certain Bombardier, Inc., Model CL-600-2B19 (Regional Jet series 100 &
440) 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-2019-0720.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 2003-09-04 R1, Amendment 39-13305 (68 FR
54985, September 22, 2003) (``AD 2003-09-04 R1''). AD 2003-09-04 R1
applied to certain Bombardier, Inc., Model CL-600-2B19 (Regional Jet
series 100 & 440) airplanes. The NPRM published in the Federal Register
on October 30, 2019 (84 FR 58062). The NPRM was prompted by a report of
fatigue cracks occurring on the pressure floor skin at FS 460 and 513.
The NPRM proposed to revise the applicability to include additional
airplanes; revise certain compliance times; and require revising the
existing maintenance or inspection program, as applicable, to
incorporate new or more restrictive airworthiness limitations. The FAA
is issuing this AD to address fatigue cracks, which could result in
failure of the pressure floor skin and consequent rapid decompression
of the airplane during flight. See the MCAI for additional background
information.

Comments

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

Request To Revise Certain Language

SkyWest Airlines requested that the FAA revise certain language in
the proposed AD. SkyWest Airlines suggested that the wording in
paragraph (i)(2) of the proposed AD be revised to more closely match
the wording in paragraph (c)(2) of AD 2003-09-04 R1. SkyWest Airlines
noted that paragraph (i)(2) of the proposed AD states that new
airworthiness limitations and inspection requirements are to be
inserted into a Bombardier Temporary Revision, but Temporary Revisions
are issued and controlled by Bombardier. SkyWest Airlines stated that
it appears that the intent of paragraph (i)(2) of the proposed AD is to
track the additional airworthiness limitations and inspection
requirements introduced by the repair described in paragraph (i)(1) of
the proposed AD.
The FAA agrees to clarify. The FAA has revised paragraph (i) of
this AD to clarify that operators must comply with any repair
instructions, including any new airworthiness limitations and
inspection requirements, approved by the FAA, TCCA, or Bombardier,
Inc.'s TCCA Design Approval Organization (DAO). As part of this
clarification, the FAA revised the content that was in paragraph (i)(2)
of the proposed AD, combined the content of paragraph (i)(1) with the
revised content of paragraph (i)(2), and moved that combined content
into paragraph (i) of this AD (eliminating paragraphs (i)(1) and (2) of
the proposed AD).

Conclusion

The FAA reviewed the relevant data, considered the comment
received, and determined that air safety and the public interest
require adopting this final rule with the change described previously
and minor editorial changes. The FAA has 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.
The FAA 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 has issued Bombardier CL-600-2B19 Temporary Revision 2B-
2265, dated July 19, 2018, to Appendix B--Airworthiness Limitations, of
Part 2 of the Bombardier Maintenance Requirements Manual; and
Bombardier CL-600-2B19 Temporary Revision 2B-2266, dated July 19, 2018,
to Appendix B--Airworthiness Limitations, of Part 2 of the Bombardier
Maintenance Requirements Manual. These temporary revisions describe
airworthiness limitations for inspections of the pressure floor skin.
These documents are distinct since they describe different
airworthiness limitations.
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

The FAA estimates that this AD would affect 37 airplanes of U.S.
registry.
The FAA has determined that revising the maintenance or inspection
program takes an average of 90 work-hours per operator, although the
agency recognizes that this number may vary from operator to operator.
In the past, the agency has estimated that this action takes 1 work-
hour per airplane. 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 agency estimates the average 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 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) 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.

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)
2003-09-04 R1, Amendment 39-13305 (68 FR 54985, September 22, 2003),
and adding the following new AD: