```

[Federal Register Volume 76, Number 125 (Wednesday, June 29, 2011)]
[Proposed Rules]
[Pages 38065-38069]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-16365]

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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-0648; Directorate Identifier 2010-NM-276-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 
(Regional Jet Series 100 & 440) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the 
products listed above that would supersede an existing AD. This 
proposed AD results from mandatory continuing airworthiness information 
(MCAI) originated by an aviation authority of another country to 
identify and correct an unsafe condition on an aviation product. The 
MCAI describes the unsafe condition as:

    Seven cases of on-ground hydraulic accumulator screw cap/end cap 
failure have been experienced on CL-600-2B19 aeroplanes, resulting 
in the loss of the associated hydraulic system and high-energy 
impact damage to adjacent systems and structure. * * *
* * * * *
    A detailed analysis of the calculated line of trajectory of a 
failed screw cap/end cap for each of the accumulators has been 
conducted, resulting in the identification of several areas where 
systems and/or structural components could potentially be damaged. 
Although all of the failures to date have occurred on the ground, an 
in-flight failure affecting such components could potentially have 
an adverse effect on the controllability of the aeroplane.
* * * * *
The proposed AD would require actions that are intended to address the 
unsafe condition described in the MCAI.

DATES: We must receive comments on this proposed AD by August 15, 2011.

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 W12-40, 1200 New 
Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday 
through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact 
Bombardier, Inc., 400 Cote-Vertu Road West, Dorval, Quebec H4S 1Y9, 
Canada; telephone 514-855-5000; fax 514-855-7401; e-mail 
thd.crj@aero.bombardier.com; Internet http://www.bombardier.com. You 
may review copies of the referenced service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington. 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: Christopher Alfano, Aerospace 
Engineer, Airframe and Mechanical Systems Branch, ANE-171, FAA, New 
York Aircraft Certification Office (ACO), 1600 Stewart Avenue, Suite 
410, Westbury, New York 11590; telephone (516) 228-7340; fax (516) 794-
5531.

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-2011-0648; 
Directorate Identifier 2010-NM-276-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 October 7, 2010, we issued AD 2010-22-02, Amendment 39-16481 (75 
FR 64636, October 20, 2010). That AD required actions intended to 
address an unsafe condition on Bombardier, Inc. Model CL-600-2B19 
(Regional Jet Series 100 & 440) airplanes.
    Since we issued AD 2010-22-02, we have determined that further 
rulemaking is necessary. While AD 2010-22-02 did not require the 
removal of the hydraulic system No. 3 accumulator, or replacement of 
the hydraulic system No. 1, inboard brake, and outboard brake 
accumulators, as specified in Part IV and Part VII of the Canadian 
Airworthiness Directive CF-2010-24, dated August 3, 2010, this NPRM 
proposes to require those actions. Also, for airplanes on which 
Bombardier Service Bulletin 601R-29-035, dated May 11, 2010, is done 
and reducer having part number MS21916D8-6 installed, this NPRM 
proposes to require replacing the reducer with a new reducer. We have 
coordinated with Transport Canada Civil Aviation (TCCA) on this issue.

Relevant Service Information

    Bombardier has issued Service Bulletin 601R-29-035, Revision A; and 
Service Bulletin 601R-32-107, Revision B; both dated December 8, 2010. 
The actions described in this service information as outlined in the 
``Discussion'' section above, are intended to correct the unsafe 
condition identified in the MCAI.

Change to Existing AD

    This proposed AD would retain all requirements of AD 2010-22-02. 
Since AD 2010-22-02 was issued, the AD format has been revised, and 
certain paragraphs have been rearranged. As a result, the corresponding 
paragraph identifiers have changed in this proposed AD, as listed in 
the following table:

[[Page 38066]]

                      Revised Paragraph Identifiers
------------------------------------------------------------------------
                                     Corresponding  requirement in this
   Requirement in AD 2010-22-02                  proposed AD
------------------------------------------------------------------------
 paragraph (j)                       paragraph (o)
 paragraph (k)                       paragraph (j)
 paragraph (l)                       paragraph (k)
 paragraph (m)                       paragraph (p)
 paragraph (n)                       paragraph (l)
 paragraph (o)                       paragraph (m)
 paragraph (p)                       paragraph (r)
 paragraph (q)                       paragraph (n)
 paragraph (r)                       paragraph (s)
------------------------------------------------------------------------

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.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in 
general, agree with their substance. But we might have found it 
necessary to use different words from those in the MCAI to ensure the 
AD is clear for U.S. operators and is enforceable. In making these 
changes, we do not intend to differ substantively from the information 
provided in the MCAI and related service information.
    We might also have proposed different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
highlighted in a NOTE within the proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 605 products of U.S. registry.
    The actions that are required by AD 2010-22-02 and retained in this 
proposed AD take about 19 work-hours per product, at an average labor 
rate of $85 per work hour. Based on these figures, the estimated cost 
of the currently required actions is $1,615 per product.
    We estimate that it would take about 14 work-hours per product to 
comply with the new basic requirements of this proposed AD. The average 
labor rate is $85 per work-hour. Required parts would cost about $3,054 
per product. Where the service information lists required parts costs 
that are covered under warranty, we have assumed that there will be no 
charge for these costs. As we do not control warranty coverage for 
affected parties, some parties may incur costs higher than estimated 
here. Based on these figures, we estimate the cost of the proposed AD 
on U.S. operators to be $2,567,620, or $4,244 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); 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.
    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

    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 Amendment 39-16481 (75 FR 
64636, October 20, 2010) and adding the following new AD:

Bombardier, Inc.: Docket No. FAA-2011-0648; Directorate Identifier 
2010-NM-276-AD.

Comments Due Date

    (a) We must receive comments by August 15, 2011.

Affected ADs

    (b) This AD supersedes AD 2010-22-02, Amendment 39-16481.

Applicability

    (c) This AD applies to Bombardier, Inc. Model CL-600-2B19 
(Regional Jet Series 100 & 440) airplanes, certificated in any 
category, serial numbers 7003 and subsequent.

Subject

    (d) Air Transport Association (ATA) of America Code 29 and 32: 
Hydraulic Power and Landing Gear, respectively.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:

    Seven cases of on-ground hydraulic accumulator screw cap/end cap 
failure have been experienced on CL-600-2B19 aeroplanes, resulting 
in the loss of the associated hydraulic system and high-energy 
impact damage to adjacent systems and structure. * * *
* * * * *
    A detailed analysis of the calculated line of trajectory of a 
failed screw cap/end cap for each of the accumulators has been 
conducted, resulting in the identification of several areas where 
systems and/or structural components could potentially be damaged. 
Although all of the failures to date have occurred on the ground, an 
in-flight failure affecting such components could potentially have 
an adverse effect on the controllability of the aeroplane.
* * * * *

Compliance

    (f) You are responsible for having the actions required by this 
AD performed within

[[Page 38067]]

the compliance times specified, unless the actions have already been 
done.

Restatement of Requirements of AD 2010-22-02, With Revised Service 
Information

Airplane Flight Manual (AFM) Revision

    (g) Within 30 days after November 4, 2010 (the effective date of 
AD 2010-22-02), revise the Limitations section, Normal Procedures 
section, and Abnormal Procedures section of the AFM by incorporating 
Canadair Regional Jet Temporary Revision (TR) RJ/186-1, dated August 
24, 2010, into the applicable section of Canadair Regional Jet AFM, 
CSP A-012. Thereafter, except as provided by paragraph (t) of this 
AD, no alternative actions specified in Canadair Regional Jet TR RJ/
186-1, dated August 24, 2010, may be approved.

    Note 1:  The actions required by paragraph (g) of this AD may be 
done by inserting a copy of Canadair Regional Jet TR RJ/186-1, dated 
August 24, 2010, into the applicable section of the Canadair 
Regional Jet AFM, CSP A-012. When this TR has been included in the 
general revisions of the AFM, the general revisions may be inserted 
into the AFM, and this TR removed, provided that the relevant 
information in the general revision is identical to that in Canadair 
Regional Jet TR RJ/186-1, dated August 24, 2010.

Deactivation of the Hydraulic System No. 3 Accumulator

    (h) Within 250 flight cycles after November 4, 2010, deactivate 
the hydraulic system No. 3 accumulator, in accordance with Part A of 
the Accomplishment Instructions of Bombardier Alert Service Bulletin 
A601R-29-031, Revision A, dated March 26, 2009. Doing the removal of 
the hydraulic system No. 3 accumulator in paragraph (o) of this AD 
is an alternate method of compliance with the requirements of this 
paragraph. The actions in this paragraph apply to all accumulators 
in hydraulic system No. 3.

Removal of the Hydraulic System No. 2 Accumulator

    (i) Within 500 flight cycles after November 4, 2010, remove the 
hydraulic system No. 2 accumulator, in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 601R-29-
032, Revision A, dated January 26, 2010. The actions in this 
paragraph apply to all accumulators in hydraulic system No. 2.

Initial and Repetitive Ultrasonic Inspection of Hydraulic System No. 1, 
Inboard Brake, and Outboard Brake Accumulators

    (j) For hydraulic system No. 1, inboard brake, and outboard 
brake accumulators having P/N 601R75138-1 (08-60163-001 or 08-60163-
002): At the applicable compliance times specified in paragraph (l) 
of this AD, do the inspections required by paragraphs (j)(1) and 
(j)(2) of this AD. Repeat the inspections for each accumulator 
having P/N 601R75138-1 (08-60163-001 or 08-60163-002) thereafter at 
intervals not to exceed 500 flight cycles until the replacement 
specified in this paragraph is done or the replacement specified in 
paragraph (p) of this AD is done. If any crack is found, before 
further flight, replace the accumulator with a new accumulator 
having P/N 601R75138-1 (08-60163-001 or 08-60163-002) and having the 
letter ``T'' after the serial number on the identification plate, in 
accordance with the Accomplishment Instructions of the applicable 
service bulletin identified in table 1 or table 2 of this AD.
    (1) Do an ultrasonic inspection for cracks on each accumulator, 
in accordance with Part B of the Accomplishment Instructions of the 
applicable service bulletin identified in table 1 of this AD.

                       Table 1--Bombardier Service Information for Accumulator Inspection
----------------------------------------------------------------------------------------------------------------
           Accumulator                      Document               Revision                    Date
----------------------------------------------------------------------------------------------------------------
Hydraulic System No. 1...........  Bombardier Alert Service   B................  May 11, 2010.
                                    Bulletin A601R-29-029,
                                    including Appendix A,
                                    dated October 18, 2007.
Inboard and Outboard Brake.......  Bombardier Alert Service   D................  May 11, 2010.
                                    Bulletin A601R-32-103,
                                    including Appendix A,
                                    Revision A, dated
                                    October 18, 2007.
----------------------------------------------------------------------------------------------------------------

     (2) Do an ultrasonic inspection for cracks on the screw cap, in 
accordance with the Accomplishment Instructions of the applicable 
service bulletin identified in table 2 of this AD.

                        Table 2--Bombardier Service Information for Screw Cap Inspection
----------------------------------------------------------------------------------------------------------------
           Accumulator                      Document               Revision                    Date
----------------------------------------------------------------------------------------------------------------
Hydraulic System No. 1...........  Bombardier Service         A................  May 11, 2010.
                                    Bulletin 601R-29-033,
                                    including Appendix A,
                                    dated May 5, 2009.
Inboard and Outboard Brake.......  Bombardier Service         A................  May 11, 2010.
                                    Bulletin 601R-32-106,
                                    including Appendix A.
----------------------------------------------------------------------------------------------------------------

     (k) For hydraulic system No. 1, inboard brake, and outboard 
brake accumulators having P/N 601R75138-1 (08-60163-001 or 08-60163-
002): Do the inspections specified in paragraph (j) of this AD at 
the applicable time in paragraph (k)(1), (k)(2), and (k)(3) of this 
AD.
    (1) For any accumulator not having the letter ``T'' after the 
serial number on the identification plate and with more than 4,500 
flight cycles on the accumulator as of November 4, 2010: Inspect 
within 500 flight cycles after November 4, 2010.
    (2) For any accumulator not having the letter ``T'' after the 
serial number on the identification plate and with 4,500 flight 
cycles or less on the accumulator as of November 4, 2010: Inspect 
prior to the accumulation of 5,000 flight cycles on the accumulator.
    (3) If it is not possible to determine the flight cycles 
accumulated for any accumulator not having the letter ``T'' after 
the serial number on the identification plate: Inspect within 500 
flight cycles after November 4, 2010.

    Note 2:  For any accumulator having P/N 601R75138-1 (08-60163-
001 or 08-60163-002) and the letter ``T'' after the serial number on 
the identification plate, or if the accumulator P/N is not listed in 
paragraph (j) of this AD, the inspection specified in paragraph (j) 
of this AD is not required.

Credit for Actions Accomplished in Accordance With Previous Service 
Information

    (l) Deactivating the hydraulic system No. 3 accumulator before 
November 4, 2010, in accordance with Part A of the Accomplishment 
Instructions of Bombardier Alert Service Bulletin A601R-29-031, 
dated December 23, 2008, is acceptable for compliance with the 
requirements of paragraph (h) of this AD.
    (m) Removing the hydraulic system No. 2 accumulator in 
accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 601R-29-032, dated November 12, 2009, before 
November 4, 2010, is acceptable for compliance with the requirements 
of paragraph (i) of this AD.
    (n) An ultrasonic inspection for cracks done before November 4, 
2010, in accordance with Part B of the Accomplishment Instructions 
of the applicable service bulletin identified in table 3 of this AD, 
or the Accomplishment Instructions of the applicable service 
bulletin identified in table 4 of this AD, is acceptable for 
compliance

[[Page 38068]]

with the corresponding ultrasonic inspection required by paragraph 
(j) of this AD.

                    Table 3--Bombardier Credit Service Information for Accumulator Inspection
----------------------------------------------------------------------------------------------------------------
                 Document                            Revision                              Date
----------------------------------------------------------------------------------------------------------------
Bombardier Alert Service Bulletin A601R-   Original....................  October 18, 2007.
 29-029.
Bombardier Alert Service Bulletin A601R-   A...........................  November 12, 2009.
 29-029.
Bombardier Alert Service Bulletin A601R-   Original....................  November 21, 2006.
 32-103.
Bombardier Alert Service Bulletin A601R-   A...........................  March 7, 2007.
 32-103.
Bombardier Alert Service Bulletin A601R-   B...........................  October 18, 2007.
 32-103.
Bombardier Alert Service Bulletin A601R-   C...........................  February 26, 2009.
 32-103.
----------------------------------------------------------------------------------------------------------------

                     Table 4--Bombardier Credit Service Information for Screw Cap Inspection
----------------------------------------------------------------------------------------------------------------
                 Document                            Revision                              Date
----------------------------------------------------------------------------------------------------------------
Bombardier Service Bulletin 601R-29-033..  Original....................  May 5, 2009.
Bombardier Service Bulletin 601R-32-106..  Original....................  May 5, 2009.
----------------------------------------------------------------------------------------------------------------

New Requirements of This AD

Removal of the Hydraulic System No. 3 Accumulator

    (o) Within 1,000 flight cycles after the effective date of this 
AD, remove the hydraulic system No. 3 accumulator, in accordance 
with Part B of the Accomplishment Instructions of Bombardier Alert 
Service Bulletin A601R-29-031, Revision A, dated March 26, 2009. 
Doing the action in this paragraph terminates the requirements of 
paragraph (h) of this AD.

Replacement of the Hydraulic System No. 1, Inboard Brake, and Outboard 
Brake Accumulators

    (p) Within 4,000 flight cycles or 24 months after the effective 
date of this AD, whichever occurs first, replace any hydraulic 
system No. 1, inboard brake, or outboard brake accumulator having P/
N 601R75138-1 (08-60163-001 or 08-60163-002), with a new accumulator 
having P/N 601R75139-1 (11093-4), in accordance with the 
Accomplishment Instructions of the applicable service bulletin 
identified in table 5 of this AD. Doing the action in this paragraph 
terminates the requirement for the inspections in paragraph (j) of 
this AD for that accumulator. As of the effective date of this AD, 
use only Bombardier Service Bulletin 601R-29-035, Revision A; or 
601R-32-107, Revision B; both dated December 8, 2010; as applicable.

                       Table 5--Bombardier Service Information for Accumulator Replacement
----------------------------------------------------------------------------------------------------------------
           Accumulator                     Document                Revision                    Date
----------------------------------------------------------------------------------------------------------------
Hydraulic System No. 1...........  Bombardier Service        Original...........  May 11, 2010.
                                    Bulletin 601R-29-035.
Hydraulic System No. 1...........  Bombardier Service        A..................  December 8, 2010.
                                    Bulletin 601R-29-035.
Inboard and Outboard Brake.......  Bombardier Service        A..................  June 17, 2010.
                                    Bulletin 601R-32-107.
Inboard and Outboard Brake.......  Bombardier Service        B..................  December 8, 2010.
                                    Bulletin 601R-32-107.
----------------------------------------------------------------------------------------------------------------

Action for Airplanes on Which Bombardier Service Bulletin 601R-29-035, 
Dated May 11, 2010 Is Done and Reducer Having P/N MS21916D8-6 Is 
Installed

    (q) For airplanes on which Bombardier Service Bulletin 601R-29-
035, dated May 11, 2010, is done, and reducer having P/N MS21916D8-6 
is installed: Within 1,200 flight cycles or 8 months after the 
effective date of this AD, replace the reducer of the hydraulic 
system No. 1 with a new reducer in accordance with Part B of 
Bombardier Service Bulletin 601R-29-035, Revision A, dated December 
8, 2010.

Credit for Actions Accomplished in Accordance With Previous Service 
Information

    (r) Removing the hydraulic system No. 3 accumulator in 
accordance with Part B of the Accomplishment Instructions of 
Bombardier Service Bulletin A601R-29-031, dated December 23, 2008, 
before November 4, 2010, is acceptable for compliance with the 
requirements of paragraph (o) of this AD.
    (s) Replacing any hydraulic system No. 1, inboard brake, or 
outboard brake accumulator before November 4, 2010, in accordance 
with the Accomplishment Instructions of Bombardier Service Bulletin 
601R-32-107, dated May 11, 2010, is acceptable for compliance with 
the corresponding requirements of paragraph (p) of this AD.

FAA AD Differences

    Note 3:  This AD differs from the MCAI and/or service 
information as follows: The actions specified in Canadian 
Airworthiness Directive CF-2010-24, dated August 3, 2010, apply only 
to Tactair accumulators. The actions required by paragraphs (h), 
(i), and (o) of this AD apply to all accumulators in the positions 
specified in paragraphs (h), (i), and (o) of this AD.

    Note 4:  While Canadian Airworthiness Directive CF-2010-24, 
dated August 3, 2010, does not require replacement of the reducer of 
the hydraulic system No. 1 with a new reducer, paragraph (q) of this 
AD does.

Other FAA AD Provisions

    (t) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York Aircraft Certification Office (ACO), ANE-170, FAA, has the 
authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19. Send information to Attn: Program 
Manager, Continuing Operational Safety, FAA, New York ACO, 1600 
Stewart Avenue, Suite 410, Westbury, New York 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. 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.

Related Information

    (u) Refer to MCAI Canadian Airworthiness Directive CF-2010-24, 
dated August 3, 2010; Canadair Regional Jet Temporary Revision RJ/
186-1, dated August 24, 2010 to the Canadair Regional Jet Airplane 
Flight

[[Page 38069]]

Manual, CSP A-012; and the service bulletins listed in table 6 of 
this AD; for related information.

                                      Table 6--Related Service Information
----------------------------------------------------------------------------------------------------------------
                 Document                            Revision                              Date
----------------------------------------------------------------------------------------------------------------
Bombardier Alert Service Bulletin A601R-   B...........................  May 11, 2010.
 29-029.
Bombardier Alert Service Bulletin A601R-   A...........................  March 26, 2009.
 29-031.
Bombardier Alert Service Bulletin A601R-   D...........................  May 11, 2010.
 32-103.
Bombardier Service Bulletin 601R-29-032..  A...........................  January 26, 2010.
Bombardier Service Bulletin 601R-29-033..  A...........................  May 11, 2010.
Bombardier Service Bulletin 601R-29-035..  A...........................  December 8, 2010.
Bombardier Service Bulletin 601R-32-106..  A...........................  May 11, 2010.
Bombardier Service Bulletin 601R-32-107..  B...........................  December 8, 2010.
----------------------------------------------------------------------------------------------------------------

    Issued in Renton, Washington, on June 16, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2011-16365 Filed 6-28-11; 8:45 am]
BILLING CODE 4910-13-P
```