Document ID: FAA-2013-0627-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: BAE SYSTEMS (OPERATIONS) LIMITED Airplanes
Posted Date: 2013-07-24T04:00Z

[Federal Register Volume 78, Number 142 (Wednesday, July 24, 2013)]
[Proposed Rules]
[Pages 44469-44473]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-17764]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0627; Directorate Identifier 2012-NM-021-AD]
RIN 2120-AA64

Airworthiness Directives; BAE Systems (Operations) Limited 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to supersede an existing airworthiness directive 
(AD) that applies to all BAE Systems (Operations) Limited Model BAe 146 
series airplanes and Model Avro 146-RJ series airplanes. The existing 
AD currently requires revising the maintenance program by incorporating 
certain airworthiness limitations that require new life limits on 
certain main landing gear (MLG) components. Since we issued that AD, we 
have determined that reduced safe life limits on certain nose landing 
gear (NLG) fittings are necessary. Analysis of these fittings showed 
the presence of forging indications in the flash line, which might 
reduce the life limits of these fittings.

This proposed AD would require revising the maintenance program to

[[Page 44470]]

incorporate certain limitations. We are proposing this AD to prevent 
fatigue cracking of certain structural elements, which could adversely 
affect the structural integrity of the airplane.

DATES: We must receive comments on this proposed AD by September 9, 
2013.

ADDRESSES: You may send comments 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: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday 
through Friday, except Federal holidays.
    For BAE Systems service information identified in this proposed AD, 
contact BAE Systems (Operations) Limited, Customer Information 
Department, Prestwick International Airport, Ayrshire, KA9 2RW, 
Scotland, United Kingdom; telephone +44 1292 675207; fax +44 1292 
675704; email RApublications@baesystems.com; Internet http://www.baesystems.com/Businesses/RegionalAircraft/index.htm. For Messier-
Dowty service information identified in this proposed AD, contact 
Messier-Dowty: Messier Services Americas, Customer Support Center, 
45360 Severn Way, Sterling, Virginia 20166-8910; telephone 703-450-
8233; fax 703-404-1621; Internet https://techpubs.services/messier-dowty.com. You may review copies of the referenced service information 
at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., 
Renton, WA. For information on the availability of this material at the 
FAA, call 425-227-1221.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this proposed AD, the regulatory 
evaluation, any comments received, and other information. The street 
address for the Docket Operations office (telephone (800) 647-5527) is 
in the ADDRESSES section. Comments will be available in the AD docket 
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Todd Thompson, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue SW., Renton, WA 98057-3356; telephone 425-227-1175; 
fax 425-227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2013-0627; 
Directorate Identifier 2012-NM-021-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD based on those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    On November 8, 2011, we issued AD 2011-24-06, Amendment 39-16870 
(76 FR 73477, November 29, 2011), which superseded AD 2010-10-22, 
Amendment 39-16301 (75 FR 28463, May 21, 2010). AD 2011-24-06 required 
actions intended to address an unsafe condition on the products listed 
above.
    Since we issued AD 2011-24-06, Amendment 39-16870 (76 FR 73477, 
November 29, 2011), we have determined that reduced safe life limits on 
certain NLG fittings are necessary. Analysis of these fittings showed 
the presence of forging indications in the flash line, which might 
reduce the life limits of these fittings. In addition, the aircraft 
maintenance manual has been revised to redefine the operating time of 
the aileron and elevator dampers. The European Aviation Safety Agency 
(EASA), which is the Technical Agent for the Member States of the 
European Community, has issued EASA Airworthiness Directive 2012-0004, 
dated January 12, 2012 (referred to after this as ``the MCAI''), to 
correct an unsafe condition for the specified products. The MCAI 
states:

    * * * Compliance with [certain chapters of the BAe 146/AVRO 146-
RJ Aircraft Maintenance Manual (AMM)] has been identified as a 
mandatory action for continued airworthiness and EASA AD 2011-0048 
was issued to require operators to comply with those instructions.
* * * * *
    Failure to comply with these instructions could result in an 
unsafe condition.
    For the reasons described above, this EASA AD retains the 
requirements of EASA AD 2011-0048 [which corresponds to FAA AD 2011-
24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011)], which 
is superseded, and requires the implementation of the new or more 
restrictive maintenance requirements and/or airworthiness 
limitations as specified in * * * [certain] sub-chapters of Chapter 
05 of the AMM at Revision 105 * * *.

The unsafe condition is fatigue cracking of certain structural 
elements, which could adversely affect the structural integrity of the 
airplane. You may obtain further information by examining the MCAI in 
the AD docket.

Relevant Service Information

    BAE Systems (Operations) Limited has issued the following service 
information. The actions described in this service information are 
intended to correct the unsafe condition identified in the MCAI.
     Subject 05-10-15, ``Aircraft Equipment Airworthiness 
Limitations,'' of Chapter 05, ``Time Limits/Maintenance Checks,'' of 
BAe 146 Series/AVRO 146-RJ Series Aircraft Maintenance Manual, Revision 
105, dated July 15, 2011.
     Subject 05-20-02, ``Airframe Scheduled Maintenance--
Landing/Calendar Life Extended,'' of Chapter 05, ``Time Limits/
Maintenance Checks,'' of BAe 146 Series/AVRO 146-RJ Series Aircraft 
Maintenance Manual, Revision 105, dated July 15, 2011.
     Subject 05-20-05, ``Airframe Scheduled Maintenance--Life 
Extension Programme Landings Life Extended,'' of Chapter 05, ``Time 
Limits/Maintenance Checks,'' of BAe 146 Series/AVRO 146-RJ Series 
Aircraft Maintenance Manual, Revision 105, dated July 15, 2011.

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design.
    This AD requires revisions to certain operator maintenance 
documents to include new actions (e.g., inspections) and/or Critical 
Design Configuration

[[Page 44471]]

Control Limitations (CDCCLs). Compliance with these actions and/or 
CDCCLs is required by 14 CFR 91.403(c). For airplanes that have been 
previously modified, altered, or repaired in the areas addressed by 
this AD, the operator may not be able to accomplish the actions 
described in the revisions. In this situation to comply with 14 CFR 
91.403(c), the operator must request approval of an alternative method 
of compliance (AMOC) according to paragraph (n) of this AD. The request 
should include a description of changes to the required actions that 
will ensure the continued operational safety of the airplane.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 2 products of U.S. registry.
    The actions that are required by AD 2011-24-06, Amendment 39-16870 
(76 FR 73477, November 29, 2011), and retained in this proposed AD take 
about 2 work-hours per product, at an average labor rate of $85 per 
work hour. Required parts cost about $0 per product. Based on these 
figures, the estimated cost of the currently required actions is $170 
per product.
    We estimate that it would take about 1 work-hour per product to 
comply with the new basic requirements of this proposed AD. The average 
labor rate is $85 per work-hour. Based on these figures, we estimate 
the cost of the proposed AD on U.S. operators to be up to $170, or $85 
per product.

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.

Regulatory Findings

    We 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. 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.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this proposed AD and placed it in the AD docket.

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

0
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]

0
2. The FAA amends Sec.  39.13 by removing airworthiness directive (AD) 
2011-24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011), and 
adding the following new AD:

BAE Systems (Operations) Limited: Docket No. FAA-2013-0627; 
Directorate Identifier 2012-NM-021-AD.

(a) Comments Due Date

    We must receive comments by September 9, 2013.

(b) Affected ADs

    This AD supersedes AD 2011-24-06, Amendment 39-16870 (76 FR 
73477, November 29, 2011).

(c) Applicability

    This AD applies to all BAE Systems (Operations) Limited Model 
BAe 146-100A, -200A, and -300A airplanes; and Model Avro 146-RJ70A, 
146-RJ85A, and 146-RJ100A airplanes; certificated in any category.

(d) Subject

    Air Transport Association (ATA) of America Code 05.

(e) Reason

    This AD was prompted by a determination that reduced safe life 
limits on certain NLG fittings are necessary. We are issuing this AD 
to prevent fatigue cracking of certain structural elements, which 
could adversely affect the structural integrity of the airplane.

(f) Compliance

    You are responsible for having the actions required by this AD 
performed within the compliance times specified, unless the actions 
have already been done.

(g) Retained Airworthiness Limitations Revisions

    (1) This paragraph restates the requirements of paragraph (g) of 
AD 2011-24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). 
Within 90 days after June 25, 2010 (the effective date of AD 2010-
10-22, Amendment 39-16301 (75 FR 28463, May 21, 2010)), revise the 
maintenance program, by incorporating Chapter 5 of the BAE Systems 
(Operations) Limited BAe146 Series/Avro 146-RJ Series Aircraft 
Maintenance Manual (AMM) to incorporate new and more restrictive 
life limits for certain items and new and more restrictive 
inspections to detect fatigue cracking in certain structures, and to 
add fuel system (CDCCLs to prevent ignition sources in the fuel 
tanks, in accordance with a method approved by the Manager, 
International Branch, ANM-116, Transport Airplane Directorate, FAA; 
or the European Aviation Safety Agency (EASA) (or its delegated 
agent).
    (2) This paragraph restates the provisions of Note 2 of AD 2011-
24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). Guidance 
on revising Chapter 5 of the BAE Systems (Operations) Limited BAe146 
Series/Avro 146-RJ Series AMM, Revision 97, dated July 15, 2009, can 
be found in the applicable sub-chapters listed in Table 1 to 
paragraph (g)(2) of this AD.

   Table 1 to Paragraph (g)(2) of This AD--Applicable AMM Sub-Chapters
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          AMM Sub-chapter                          Subject
------------------------------------------------------------------------
05-10-01..........................  Airframe Airworthiness Limitations
                                     before Life Extension Programme.
05-10-05 \1\......................  Airframe Airworthiness Limitations,
                                     Life Extension Programme Landings
                                     Life Extended.

[[Page 44472]]

 
05-10-10 \2\......................  Airframe Airworthiness Limitations,
                                     Life Extension Programme Calendar
                                     Life Extended.
05-10-15..........................  Aircraft Equipment--Airworthiness
                                     Limitations.
05-10-17..........................  Power Plant Airworthiness
                                     Limitations.
05-15-00..........................  Critical Design Configuration
                                     Control Limitations (CDCCL)--Fuel
                                     System Description and Operation.
05-20-00 \3\......................  Scheduled Maintenance.
05-20-01..........................  Airframe Scheduled Maintenance--
                                     Before Life Extension Programme.
05-20-05 \1\......................  Airframe Scheduled Maintenance--Life
                                     Extension Programme Landings Life
                                     Extended.
05-20-10 \2\......................  Airframe Scheduled Maintenance--Life
                                     Extension Programme Calendar Life
                                     Extended.
05-20-15..........................  Aircraft Equipment Scheduled
                                     Maintenance.
------------------------------------------------------------------------
\1\ Applicable only to airplanes post-modification HCM20011A or
  HCM20012A or HCM20013A.
\2\ Applicable only to airplanes post-modification HCM20010A.
\3\ Paragraphs 5 and 6 only, on the Corrosion Prevention and Control
  Program (CPCP) and the Supplemental Structural Inspection Document
  (SSID).

    (3) This paragraph restates the provisions of Note 3 of AD 2011-
24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). Sub-
chapter 05-15-00 of the BAE Systems (Operations) Limited BAe146 
Series/Avro 146-RJ Series AMM, is the CDCCL.
    (4) This paragraph restates the provisions of Note 4 of AD 2011-
24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). Within 
Sub-chapter 05-20-00 of the BAE Systems (Operations) Limited BAe146 
Series/Avro 146-RJ Series AMM, the relevant issues of the support 
documents are as follows: BAE Systems (Operations) Limited BAe 146 
Series/Avro 146-RJ Corrosion Prevention and Control Program Document 
CPCP-146-01, Revision 3, dated July 15, 2008, including BAE Systems 
(Operations) Limited Temporary Revision (TR) 2.1, dated December 
2008; and BAE Systems (Operations) Limited BAe146 Series 
Supplemental Structural Inspection Document SSID-146-01, Revision 1, 
dated June 15, 2009.
    (5) This paragraph restates the provisions of Note 5 of AD 2011-
24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). Within 
Sub-chapter 05-20-01 of the BAE Systems (Operations) Limited BAe146 
Series/Avro146-RJ Series AMM, the relevant issue of BAE Systems 
(Operations) Limited BAe 146/Avro 146-RJ Maintenance Review Board 
Report Document MRB 146-01, Issue 2, is Revision 15, dated March 
2009 (mis-identified in EASA AD 2009-0215, dated October 7, 2009, as 
being dated May 2009).
    (6) This paragraph restates the provisions of Note 6 of AD 2011-
24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). 
Notwithstanding any other maintenance or operational requirements, 
components that have been identified as airworthy or installed on 
the affected airplanes before revision of Chapter 5 of the AMM, as 
required by paragraph (g) of this AD, do not need to be reworked in 
accordance with the CDCCLs. However, once the Airworthiness 
Limitations Section (ALS) or AMM has been revised, future 
maintenance actions on these components must be done in accordance 
with the CDCCLs.

(h) Retained Restriction of Alternative Actions, Intervals, and/or 
CDCCLs

    This paragraph restates the requirements of paragraph (h) of AD 
2011-24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). 
Except as specified in paragraphs (i) and (j) of this AD and 
required by paragraph (l) of this AD: After the actions specified in 
paragraph (g) of this AD have been accomplished, no alternative 
inspections or inspection intervals may be approved for the 
structural elements specified in the documents listed in paragraph 
(g) of this AD unless the actions, intervals, and/or CDCCLs are 
approved as an alternative method of compliance (AMOC) in accordance 
with the procedures specified in paragraph (n) of this AD.

(i) Retained Modification

    This paragraph restates the provisions of paragraph (i) of AD 
2011-24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). 
Modifying the main fittings of the main landing gear in accordance 
with Messier-Dowty Service Bulletin 146-32-171, dated August 11, 
2009, extends the safe limit of the main landing gear main fitting 
from 32,000 landings to 50,000 landings on the main fitting.

(j) Retained Airworthiness Limitations Revisions

    This paragraph restates the requirements of paragraph (j) of AD 
2011-24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). 
Within 90 days after January 3, 2012 (the effective date of AD 2011-
24-06), revise the maintenance program, by incorporating Subject 05-
10-15, ``Aircraft Equipment Airworthiness Limitations'' of Chapter 
05, ``Time Limits/Maintenance Checks,'' of the BAE Systems 
(Operations) Limited BAe 146 Series/Avro 146-RJ Series AMM, Revision 
104, dated April 15, 2011, to remove life limits on shock absorber 
assemblies, but not on the individual shock absorber components, 
amend life limits on MLG up-locks and door up-locks, and to 
introduce and amend life limits on MLG components. Incorporating the 
new life limits and inspections into the maintenance program 
terminates the requirements of paragraph (g) of this AD for Subject 
05-10-15, ``Aircraft Equipment Airworthiness Limitations'' of 
Chapter 05, ``Time Limits/Maintenance Checks,'' of the BAE Systems 
(Operations) Limited BAe 146 Series/Avro 146-RJ Series AMM, Revision 
104, dated April 15, 2011, and after incorporation has been done, 
the limitations required by paragraph (g) of this AD for Subject 05-
10-15, ``Aircraft Equipment Airworthiness Limitations'' of Chapter 
05, ``Time Limits/Maintenance Checks,'' of the BAE Systems 
(Operations) Limited BAe 146 Series/Avro 146-RJ Series AMM, Revision 
104, dated April 15, 2011, may be removed from the maintenance 
program.

(k) Retained Restriction of Alternative Actions, Intervals, and/or 
CDCCLs

    This paragraph restates the requirements of paragraph (k) of AD 
2011-24-06, Amendment 39-16870 (76 FR 73477, November 29, 2011). 
Except as required by paragraph (l) of this AD, after accomplishing 
the revision required by paragraph (j) of this AD, no alternative 
actions (e.g., inspections), intervals, and/or CDCCLs may be used, 
unless the actions, intervals, and/or CDCCLs are approved as an 
alternative method of compliance (AMOC) in accordance with the 
procedures specified in paragraph (n) of this AD.

(l) New Airworthiness Limitation Revision

    Within 90 days after the effective date of this AD, revise the 
maintenance program, by incorporating Chapter 05, ``Time Limits/
Maintenance Checks,'' of the BAE Systems (Operations) Limited BAe 
146 Series/Avro 146-RJ Series AMM, Revision 105, dated July 15, 
2011, into the maintenance program. The initial compliance time for 
the replacement of any part having a new or revised life limit is at 
the applicable time specified in Chapter 05, ``Time Limits/
Maintenance Checks,'' of the BAE Systems (Operations) Limited BAe 
146 Series/Avro 146-RJ Series AMM, Revision 105, dated July 15, 
2011, or within 90 days after the effective date of this AD, 
whichever occurs later.
    (1) Within Sub-chapter 05-20-00 of the BAE Systems (Operations) 
Limited BAe146 Series/Avro 146-RJ Series AMM, supporting documents 
are BAE Systems (Operations) Limited CPCP Document CPCP-146-01, 
Revision 4, dated September 15, 2010; and BAE Systems (Operations) 
Limited Supplemental Structural Inspection Document (SSID) Document 
SSID-146-01/02/03, dated July 12, 2006.
    (2) Within Sub-chapter 05-20-01 of the BAE Systems (Operations) 
Limited BAe146 Series/Avro146-RJ Series AMM, the supporting document 
is BAE Systems (Operations) Limited Maintenance Review

[[Page 44473]]

Board Report (MRBR) Document MRB 146-01, Issue 2, Revision 17, dated 
March 2011.

(m) No Alternative Actions, Intervals, and/or CDCCLs

    After accomplishing the revision required by paragraph (l) of 
this AD, no alternative actions (e.g., inspections), intervals, and/
or CDCCLs may be used, unless the actions, intervals, and/or CDCCLs 
are approved as an AMOC in accordance with the procedures specified 
in paragraph (n) of this AD.

(n) Other FAA AD Provisions

    The following provisions also apply to this AD: (1) Alternative 
Methods of Compliance (AMOCs): The Manager, International 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 International Branch, send it to ATTN: 
Todd Thompson, Aerospace Engineer, International Branch, ANM-116, 
Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, 
WA 98057-3356; telephone 425-227-1175; fax 425-227-1149. Information 
may be emailed to: 9-ANM-116-AMOC-REQUESTS@faa.gov. 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. The 
AMOC approval letter must specifically reference this AD.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to assure the product 
is airworthy before it is returned to service.

(o) Related Information

    (1) Refer to mandatory continuing airworthiness information EASA 
Airworthiness Directive 2012-0004, dated January 12, 2012; and 
Chapter 05, ``Time Limits/Maintenance Checks,'' of the BAE Systems 
(Operations) Limited BAe 146 Series/Avro 146-RJ Series AMM, Revision 
105, dated July 15, 2011; for related information.
    (2) For BAE Systems service information identified in this AD, 
contact BAE Systems (Operations) Limited, Customer Information 
Department, Prestwick International Airport, Ayrshire, KA9 2RW, 
Scotland, United Kingdom; telephone +44 1292 675207; fax +44 1292 
675704; email RApublications@baesystems.com; Internet http://www.baesystems.com/Businesses/RegionalAircraft/index.htm. For 
Messier-Dowty service information identified in this proposed AD, 
contact Messier-Dowty: Messier Services Americas, Customer Support 
Center, 45360 Severn Way, Sterling, Virginia 20166-8910; telephone 
703-450-8233; fax 703-404-1621; Internet https://techpubs.services/messier-dowty.com. You may review copies of the referenced service 
information at the FAA, Transport Airplane Directorate, 1601 Lind 
Avenue SW., Renton, WA. For information on the availability of this 
material at the FAA, call 425-227-1221.

    Issued in Renton, Washington, on July 12, 2013.
Jeffrey E. Duven,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2013-17764 Filed 7-23-13; 8:45 am]
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