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PROPOSED AD BOMBARDIER, INC.: Docket No. FAA-2019-0436; Product Identifier 2019-NM-014-AD.
(a) COMMENTS DUE DATE

    The FAA must receive comments by August 5, 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 (c)(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 mainte-
    nance or inspection program, as applicable,  to incorporate the infor-
    mation specified  in  paragraphs (g)(1)(i)  through (g)(1)(vi) of this
    AD. The initial compliance time for accomplishing the actions is with-
    in 90 days after the effective date of this AD; or within the applica-
    ble interval specified in Section 3-Systems and Powerplant Program, of
    the Bombardier Model CL-600-2B19 Series 100/200/440  Maintenance Plan-
    ning 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 Utili-
    zation 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 Spher-
    ical 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 from 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 (g)(2)(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 air-
    planes that are not operating under the LUMP:  Within 30 days from the
    effective date of this AD,  revise the existing maintenance or inspec-
    tion 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 air-
    planes 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 indicated 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              After the airplane accumulates 1,000
    flight hours                     total flight hours, but not to exceed
                                     1,400 total flight hours

    800 or more total                Within 880 flight hours from the
    flight hours and less            effective date of this AD
    than 6,000 total flight
    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 re-
    quired 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 applicable.

(l) NO INSPECTION FOR CERTAIN AIRPLANES

    The requirements of paragraphs (j) and (k) are not applicable  to air-
    planes 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 (m)(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 re-
    quested 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 informa-
    tion 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; tele-
    phone 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. 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-
    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.

(3) For service information identified in this AD, 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.

Issued in Des Moines, Washington, on June 12, 2019. Michael Kaszycki, Act-
ing Director, System Oversight Division, Aircraft Certification Service.

DATES: The FAA must receive comments on this proposed AD by August 5, 2019
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0436; Product Identifier 2019-NM-014-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for 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 proposed AD
was prompted by reports of power control unit (PCU) rod end fractures
due to pitting corrosion. This proposed AD would require revising the
existing maintenance or inspection program, as applicable, to
incorporate new or more restrictive airworthiness limitations. This
proposed AD would also require detailed inspections of the elevator PCU
rod ends and applicable corrective actions. This proposed AD would also
prohibit using certain aircraft maintenance manual tasks. The FAA is
proposing this AD to address the unsafe condition on these products.

DATES: The FAA must receive comments on this proposed AD by August 5,
2019.

ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:

Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the
instructions for submitting comments.

Fax: 202-493-2251.

Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.

Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

For service information identified in this NPRM, contact
Bombardier, Inc., 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.

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-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 NPRM, the regulatory evaluation, any comments received, and other
information. The street address for Docket Operations is listed above.
Comments will be available in the AD docket shortly after receipt.

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
:

Comments Invited

The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include "Docket No. FAA-2019-0436;
Product Identifier 2019-NM-014-AD" at the beginning of your comments.
The FAA specifically invites comments on the overall regulatory,
economic, environmental, and energy aspects of this NPRM. The FAA will
consider all comments received by the closing date and may amend this
NPRM because of those comments.

The FAA will post all comments the agency receives, without change,
to http://www.regulations.gov, including any personal information you
provide. The FAA will also post a report summarizing each substantive
verbal contact the agency receives about this NPRM.

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. The MCAI
states:

There have been several in-service reports of Power Control Unit
(PCU) rod end fractures due to pitting corrosion. Investigation
revealed that the PCU rod end spherical bearing could seize which,
in turn, could induce a bending moment on the PCU output rod. This
bending moment will eventually fracture the rod end. It was also
noted that this failure mode typically occurs within the first 6000
hours of aeroplane operation.

This condition, if not corrected, could lead to a disconnect
between the PCU and the control surface, potential loss of the
control surface function or inadequate flutter suppression.

This [Canadian] AD mandates incorporation of revised tasks into
the maintenance manuals for detailed inspections of the PCU rod ends
in order to allow timely detection of pitting corrosion [and would
prohibit using certain aircraft maintenance manual tasks].

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-2019-0436.

Related Service Information Under 1 CFR Part 51

Bombardier, Inc., 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.

FAA's Determination

This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to the FAA's bilateral agreement with the State of Design Authority,
the FAA has been notified of the unsafe condition described in the MCAI
and service information referenced above. The FAA is proposing this AD
because the FAA evaluated all the relevant information and determined
the unsafe condition described previously is likely to exist or develop
on other products of the same type design.

Proposed Requirements of This NPRM

This proposed AD would require revising the existing maintenance or
inspection program, as applicable, to incorporate new or more
restrictive airworthiness limitations and to prohibit using certain
aircraft maintenance manual tasks. Additionally, this proposed AD would
require 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.

Costs of Compliance


The FAA estimates that this proposed AD affects 1,008 airplanes of
U.S. registry. The FAA estimates the following costs to comply with
this proposed AD:

Estimated Costs for Required Actions *

Labor cost
Parts cost
Cost per product
Cost on U.S. operators
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 proposed 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 proposed 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

The FAA determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.

For the reasons discussed above, I certify this proposed
regulation:

1. Is not a "significant regulatory action" under Executive Order
12866;

2. 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.

The Proposed Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec. 39.13 [Amended]


2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive (AD):