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2019-19-08 BOMBARDIER, INC.: Amendment 39-19744; Docket No. FAA-2019-0436; Product Identifier 2019-NM-014-AD.
(a) EFFECTIVE DATE

    This AD is effective December 17, 2019.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies  to Bombardier, Inc.,  airplanes, certificated in  any
    category, as identified in paragraphs (c)(1) through (4) of this AD.

(1) Model CL-600-2B19  (Regional Jet Series 100 & 440)  airplanes,  serial
    numbers 7003 and subsequent.

(2) Model  CL-600-2C10  (Regional  Jet  Series 700, 701 & 702)  airplanes,
    serial numbers 10002 through 10999 inclusive.

(3) Model CL-600-2D15 (Regional Jet Series 705)  and CL-600-2D24 (Regional
    Jet Series 900) airplanes,  serial numbers  15001 through 15990 inclu-
    sive.

(4) Model CL-600-2E25 (Regional Jet Series 1000) airplanes, serial numbers
    19001 through 19990 inclusive.

(d) SUBJECT

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

(e) REASON

    This AD was prompted  by reports of power  control unit (PCU) rod  end
    fractures due  to pitting  corrosion. The  FAA is  issuing this  AD to
    address this condition,  which, if not  detected and corrected,  could
    lead  to  a  disconnect  between  the  PCU  and  the  control surface,
    resulting  in  potential  loss  of  the  control  surface  function or
    inadequate flutter suppression.

(f) COMPLIANCE

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

(g) MAINTENANCE OR INSPECTION PROGRAM REVISION FOR CERTAIN AIRPLANES OPER-
    ATING UNDER THE LOW UTILIZATION MAINTENANCE PROGRAM (LUMP)

(1) For  Model CL-600-2B19 airplanes operating  under the LUMP:  Within 90
    days  after  the  effective  date  of  this  AD,  revise  the existing
    maintenance or inspection program,  as applicable, to incorporate  the
    information specified in paragraphs (g)(1)(i) through (vi) of this AD.
    The initial compliance time for accomplishing the actions is within 90
    days after  the effective  date of  this AD;  or within the applicable
    interval specified in Section 3-Systems and Powerplant Program, of the
    Bombardier Model CL-600- 2B19 Series 100/200/440 Maintenance  Planning
    Manual, Low  Utilization Maintenance  Program (MRLUMP-001),  CSP A-054
    -009, Revision 37, dated July 10, 2018 ("MRLUMP-001, Revision 37"); or
    Section 3-Systems and Powerplant  Program, of the Bombardier  Model CL
    -600-2B19  Series   100/200/440  Maintenance   Planning  Manual,   Low
    Utilization Maintenance Program (MRLUMP-002), CSP A-054-060,  Revision
    37,  dated  July  10,  2018  ("MRLUMP-002,  Revision  37"),  after the
    effective date of this AD; whichever occurs later.

(i) Task 27-20-00-13,  Operational Check of the Rudder Control System,  of
    MRLUMP-001, Revision 37.

(ii) Task  27-23-01-01,  Detailed  Inspection  of  the  Rudder PCU Rod End
     Spherical Ball, of MRLUMP-001, Revision 37.

(iii) Task 27-31-00-05,  Operational Check of the Elevator Control System,
      of MRLUMP-001, Revision 37.

(iv) Task 27-20-00-13,  Operational Test of the Rudder Control System,  of
     MRLUMP-002, Revision 37.

(v) Task 27-23-01-01,  Detailed  Inspection  of  the  Rudder  PCU  Rod End
    Spherical Ball, of MRLUMP-002, Revision 37.

(vi) Task 27-31-00-05, Operational Test of the Elevator Control System, of
     MRLUMP-002, Revision 37.

(2) For  Model CL-600-2C10  airplanes  having serial numbers 10004, 10040,
    10043, 10052, 10100, 10164, 10183, 10187, 10204, 10206, 10217,  10247,
    10289, 10332,  and 10343  operating under  the LUMP;  and Model CL-600
    -2D15 and  CL-600-2D24 airplanes  having serial  numbers 15158, 15278,
    and 15370 operating under the LUMP: Within 30 days after the effective
    date  of  this  AD,  revise  the  existing  maintenance  or inspection
    program, as  applicable, to  incorporate the  information specified in
    paragraphs (g)(2)(i) through (iii) of this AD. The initial  compliance
    time  for  accomplishing  the  actions is  within  30  days  after the
    effective date of this AD; or within the applicable interval specified
    in Section  3-Systems/Power Plant  Tasks, of  the Bombardier  Model CL
    -600-2C10,  CL-600-2D15, CL-600-2D24,  Series 700/705/900  Maintenance
    Planning Manual,  Low Utilization  Maintenance Program  (LUMP), CSP BC
    -116, Revision 15, dated May 25, 2017 ("LUMP, Revision 15"), after the
    effective date of this AD; whichever occurs later.

(i) Task 27-20-00-106,  Operational Test of the Rudder PCUs (Duplicate CMR
    27-20-00-106), of LUMP, Revision 15.

(ii) Task 273000-207, Operational Test of the Elevator Power-Control Units
     (PCUs), of LUMP, Revision 15.

(iii) Task 273000-215,  Detailed Inspection  of  the  Elevator PCU Rod End
      Spherical Ball, of LUMP, Revision 15.

(h) MAINTENANCE OR INSPECTION PROGRAM REVISION  FOR CERTAIN AIRPLANES THAT
    ARE NOT OPERATING UNDER THE LUMP

    For  Model  CL-600-2C10,  CL-600-2D15,  CL-600-2D24,  and  CL-600-2E25
    airplanes that are not operating under the LUMP: Within 30 days  after
    the effective  date of  this AD,  revise the  existing maintenance  or
    inspection  program,  as applicable,  to  incorporate the  information
    specified in task 273000-207, Operational Check of each Elevator  PCU,
    of Subject 1-27, of Section 1, Systems and Powerplant Program,  Volume
    1 of Part 1, Maintenance Review Board Report, Revision 18, dated  July
    25, 2018,  of the  Bombardier Model  CL-600-2C10, CL-600-2D15,  CL-600
    -2D24,   and    CL-600-2E25   Series    700/705/900/1000   Maintenance
    Requirements  Manual,  CSP  B-053,  ("CSP  B-053,  Revision  18"). The
    initial compliance  time for  accomplishing the  actions is  within 30
    days after  the effective  date of  this AD;  or within the applicable
    interval specified in CSP B-053, Revision 18, after the effective date
    of this AD; whichever occurs later.

(i) NO ALTERNATIVE ACTIONS OR INTERVALS

    After the existing maintenance or inspection program has been  revised
    as required by paragraph (g) or (h) of this AD, no alternative actions
    (e.g., inspections) or  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  (n)(1) of
    this AD.

(j) FIRST INSPECTION OF THE ELEVATOR PCU ROD END FOR CERTAIN AIRPLANES

    For  Model  CL-600-2C10,  CL-600-2D15,  CL-600-2D24,  and  CL-600-2E25
    airplanes  that  are  not  operating under  the  LUMP,  and  that have
    accumulated less  than 6,000  total flight  hours as  of the effective
    date of this AD: Within the  compliance time specified in figure 1  to
    paragraph (j) of  this AD, perform  a detailed inspection  for pitting
    and corrosion of the left and right rod ends of the elevator PCUs  and
    to make sure that  the spherical ball and  inner race of the  rod ends
    move freely, and do  all applicable corrective actions,  in accordance
    with paragraph 2.B. of  the Accomplishment Instructions of  Bombardier
    Service Bulletin 670BA-27-074, dated June 22, 2017. Do all  applicable
    corrective actions before further flight.


        FIGURE 1 TO PARAGRAPH (J)  FIRST INSPECTION COMPLIANCE TIMES     
    ______________________________________________________________________
    TOTAL FLIGHT HOURS AS OF THE
    EFFECTIVE DATE OF THIS AD                    COMPLIANCE TIME
    ______________________________________________________________________
    Less than 800 total flight hours      After the airplane accumulates
                                          1,000 total flight hours, but
                                          not to exceed 1,400 total flight
                                          hours

    800 or more total flight hours        Within 880 flight hours from the
    and less than 6,000 total flight      effective date of this AD
    hours
    ______________________________________________________________________

(k) SECOND INSPECTION OF THE ELEVATOR PCU ROD END FOR CERTAIN AIRPLANES

(1) For  Model CL-600-2C10, CL-600-2D15, CL-600-2D24, and CL-600-2E25 air-
    planes  that  are  not  operating  under  the  LUMP,  and  that   have
    accumulated  2,600 total  flight hours  or less  at the  time  of  the
    inspection  required  by  paragraph   (j)  of  this  AD:   Before  the
    accumulation  of  3,400  total  flight  hours,  perform  an additional
    detailed inspection for  pitting and corrosion  of the left  and right
    rod ends of the elevator PCUs and to make sure that the spherical ball
    and inner  race of  the rod  ends move  freely, and  do all applicable
    corrective  actions,  in  accordance   with  paragraph  2.B.  of   the
    Accomplishment Instructions  of Bombardier  Service Bulletin  670BA-27
    -074, dated June 22, 2017. Do all applicable corrective actions before
    further flight.

(2) For airplanes that have accumulated more than 2,600 total flight hours
    at the time of the inspection required by paragraph (j) of this AD:  A
    second inspection is not required.

(l) NO INSPECTION FOR CERTAIN AIRPLANES

    The  requirements  of  paragraphs  (j) and  (k)  of  this  AD are  not
    applicable to airplanes that have accumulated 6,000 total flight hours
    or more as of the effective date of this AD.

(m) SERVICE INFORMATION PROHIBITION FOR CERTAIN AIRPLANES

    For all Model CL-600-2B19 airplanes: After 30 days from the  effective
    date of this AD, this AD prohibits the use of the aircraft maintenance
    manual (AMM) tasks specified in paragraphs (m)(1) through (3) of  this
    AD.

(1) Task 10-12-00-550-804 Short-Term Storage Return-to-Service Maintenance
    Checks,  of  the  Bombardier CL-600-2B19 Series  100/200/440 AMM,  CSP
    A-001, Revision 55, dated April 10, 2017, or earlier revisions of this
    task.

(2) Task  27-23-01-220-801,  Detailed Inspection of the Rudder PCU Rod End
    Spherical Ball,  of the Bombardier CL-600-2B19 Series 100/200/440 AMM,
    CSP A-001, Revision 54,  dated October 10, 2016,  or earlier revisions
    of this task.

(3) Task 27-33-01-220-801, Detailed Inspection of the Elevator PCU Rod End
    Spherical Ball,  of the Bombardier CL-600-2B19 Series 100/200/440 AMM,
    CSP A-001, Revision 54, dated October 10, 2016,  or  earlier revisions
    of this task.

(n) 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.

(o) RELATED INFORMATION

(1) Refer   to   Mandatory  Continuing  Airworthiness  Information  (MCAI)
    Canadian AD CF-2018-29,  dated November 2, 2018,  for related informa-
    tion, 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-2019-0436.

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

(p) 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-27-074, dated June 22, 2017.

(ii) Section 3-Systems and Powerplant Program, of the Bombardier Model CL-
     600-2B19 Series 100/200/440 Maintenance Planning Manual, Low Utiliza-
     tion Maintenance Program  (MRLUMP-001),  CSP A-054-009,  Revision 37,
     dated July 10, 2018.

(A) Task 27-20-00-13, Operational Check of the Rudder Control System.

(B) Task  27-23-01-01,  Detailed  Inspection  of  the  Rudder  PCU Rod End
    Spherical Ball.

(C) Task 27-31-00-05, Operational Check of the Elevator Control System.

(iii) Section 3-Systems and Powerplant Program,  of  the  Bombardier Model
      CL-600-2B19 Series  100/200/440  Maintenance  Planning  Manual,  Low
      Utilization Maintenance Program (MRLUMP-002), CSP A-054-060 Revision
      37, dated July 10, 2018.

(A) Task 27-20-00-13, Operational Test of the Rudder Control System.

(B) Task  27-23-01-01,  Detailed  Inspection  of  the  Rudder  PCU Rod End
    Spherical Ball.

(C) Task 27-31-00-05, Operational Test of the Elevator Control System.

(iv) Section 3-Systems/Power Plant Tasks,  of the Bombardier Model CL-600-
     2C10, CL-600-2D15, CL-600-2D24, Series 700/705/900 Maintenance Plann-
     ing Manual,  Low Utilization Maintenance Program (LUMP),  CSP BC-116,
     Revision 15, dated May 25, 2017.

(A) Task 27-20-00-106,  Operational Test of the Rudder PCUs (Duplicate CMR
    27-20-00-106).

(B) Task 273000-207,  Operational Test of the Elevator Power-Control Units
    (PCUs).

(C) Task  273000-215,  Detailed  Inspection  of  the  Elevator PCU Rod End
    Spherical Ball.

(v) Task 273000-207,  Operational Check of each Elevator PCU,  of  Subject
    1-27, of Section 1,  Systems and Powerplant Program,  Volume 1 of Part
    1, Maintenance Review Board Report, Revision 18,  dated July 25, 2018,
    of the Bombardier  Model CL-600-2C10,  CL-600-2D15,  CL-600-2D24,  and
    CL-600-2E25 Series 700/705/900/1000  Maintenance  Requirements Manual,
    CSP B-053.

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

Issued in Des Moines, Washington, on September 19, 2019. Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification Service

FOR FURTHER INFORMATION CONTACT:  Darren  Gassetto,   Aerospace  Engineer,
Mechanical Systems and Admin 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.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0436; Product Identifier 2019-NM-014-AD; Amendment
39-19744; AD 2019-19-08]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

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

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Bombardier, Inc., Model CL-600-2B19 (Regional Jet Series 100 &
440), CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2D15
(Regional Jet Series 705), CL-600-2D24 (Regional Jet Series 900), and
CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted
by reports of power control unit (PCU) rod end fractures due to pitting
corrosion. This AD requires revising the existing maintenance or
inspection program, as applicable, to incorporate new maintenance
tasks. This AD also requires detailed inspections of the elevator PCU
rod ends and applicable corrective actions. This AD also prohibits
using certain aircraft maintenance manual tasks. The FAA is issuing
this AD to address the unsafe condition on these products.

DATES: This AD is effective December 17, 2019.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of December 17,
2019.

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 https://www.regulations.gov by searching for and locating
Docket No. FAA-2019-0436.

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-
0436; 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: Darren Gassetto, Aerospace Engineer,
Mechanical Systems and Admin 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

Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2018-29, dated November
2, 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-600-2B19 (Regional Jet
Series 100 & 440), CL-600-2C10 (Regional Jet Series 700, 701 & 702),
CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 (Regional Jet Series
900), and CL-600-2E25 (Regional Jet Series 1000) 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-2019-0436.
The FAA 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-600-2B19 (Regional Jet Series 100 & 440), CL-600-2C10
(Regional Jet Series 700, 701 & 702), CL-600-2D15 (Regional Jet Series
705), CL-600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional
Jet Series 1000) airplanes. The NPRM published in the Federal Register
on June 21, 2019 (84 FR 29108). The NPRM was prompted by reports of PCU
rod end fractures due to pitting corrosion. The NPRM proposed to
require revising the existing maintenance or inspection program, as
applicable, to incorporate new maintenance tasks. The NPRM also
proposed to require detailed inspections of the elevator PCU rod ends
and applicable corrective actions, and prohibit using certain aircraft
maintenance manual tasks.
The FAA is issuing this AD to address PCU rod end fractures due to
pitting corrosion, which, if not detected and corrected, could lead to
a disconnect between the PCU and the control surface, resulting in
potential loss of the control surface function or inadequate flutter
suppression. See the MCAI for additional background information.

Comments

The FAA gave the public the opportunity to participate in
developing this final rule. The FAA has considered the comment
received. The commenter, Patrick Imperatrice, stated that he supports
the NPRM.

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 as proposed, except for 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.

Related Service Information Under 1 CFR Part 51

Bombardier has issued the following service information.
Bombardier Service Bulletin 670BA-27-074, dated June 22, 2017. This
service information describes procedures for detailed inspections for
pitting and corrosion of the left and right rod ends of the elevator
PCUs and to make sure that the spherical ball and inner race of the rod
ends move freely, and applicable corrective actions. Corrective actions
include installing a new PCU.
The following tasks describe operational checks of the elevator and
rudder control systems, and a detailed inspection of the rudder PCU rod
end spherical ball.
Task 27-20-00-13, Operational Check of the Rudder Control
System of Section 3--Systems and Powerplant Program, of the Bombardier
Model CL-600-2B19 Series 100/200/440 Maintenance Planning Manual, Low
Utilization Maintenance Program (MRLUMP-001), CSP A-054-009, Revision
37, dated July 10, 2018 (``MRLUMP-001, Revision 37'').
Task 27-23-01-01, Detailed Inspection of the Rudder PCU
Rod End Spherical Ball, of MRLUMP-001, Revision 37.
Task 27-31-00-05, Operational Check of the Elevator
Control System, of MRLUMP-001, Revision 37.
The following tasks describe operational tests of the elevator and
rudder control systems, and a detailed inspection of the rudder PCU rod
end spherical ball.
Task 27-20-00-13, Operational Test of the Rudder Control
System, of Section 3--Systems and Powerplant Program, of the Bombardier
Model CL-600-2B19 Series 100/200/440 Maintenance Planning Manual, Low
Utilization Maintenance Program (MRLUMP-002), CSP A-054-060, Revision
37, dated July 10, 2018 (``MRLUMP-002, Revision 37'').
Task 27-23-01-01, Detailed Inspection of the Rudder PCU
Rod End Spherical Ball, of MRLUMP-002, Revision 37.
Task 27-31-00-05, Operational Test of the Elevator Control
System, of MRLUMP-002, Revision 37.
The following tasks describe operational tests of the elevator and
rudder PCUs, and a detailed inspection of the elevator PCU rod end
spherical ball.
Task 27-20-00-106, Operational Test of the Rudder PCUs
(Duplicate CMR 27-20-00-106), of Section 3--Systems/Power Plant Tasks,
of the Bombardier Model CL-600-2C10, CL-600-2D15, CL-600-2D24, Series
700/705/900 Maintenance Planning Manual, Low Utilization Maintenance
Program (LUMP), CSP BC-116, Revision 15, dated May 25, 2017 (``LUMP,
Revision 15'').
Task 273000-207, Operational Test of the Elevator Power-
Control Units (PCUs), of LUMP, Revision 15.
Task 273000-215, Detailed Inspection of the Elevator PCU
Rod End Spherical Ball, of LUMP, Revision 15.
The following task describes an operational check of each elevator
PCU.
Task 273000-207, Operational Check of each Elevator PCU,
of Subject 1-27, of Section 1, Systems and Powerplant Program, Volume 1
of Part 1, Maintenance Review Board Report, Revision 18, dated July 25,
2018, of the Bombardier Model CL-600-2C10, CL-600-2D15, CL-600-2D24,
and CL-600-2E25 Series 700/705/900/1000 Maintenance Requirements
Manual, CSP B-053.
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 affects 1,008 airplanes of U.S.
registry. The FAA estimates 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
9 work-hours x $85 per hour = $765
$0
$765
$771,120

* Table does not include estimated costs for revising the maintenance or
inspection program.

The FAA has determined that revising the existing 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. In the past, the FAA 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 FAA estimates the total cost per
operator to be $7,650 (90 work-hours x $85 per work-hour).
The FAA has received no definitive data that would enable the
agency to provide cost estimates for the on-condition actions specified
in this AD.

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.
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) 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 adding the following new airworthiness
directive (AD):