AD 2011-23-08

[Federal Register Volume 76, Number 222 (Thursday, November 17, 2011)]
[Rules and Regulations]
[Pages 71241-71246]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2011-29680]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-0648; Directorate Identifier 2010-NM-276-AD; 
Amendment 39-16859; AD 2011-23-08]
RIN 2120-AA64


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

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

ACTION: Final rule.

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SUMMARY: We are superseding an existing airworthiness directive (AD) 
that applies to certain Bombardier, Inc. Model CL-600-2B19 (Regional 
Jet Series 100 & 440) airplanes. This 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.
* * * * *

We are issuing this AD to require actions to correct the unsafe 
condition on these products.

DATES: This AD becomes effective December 22, 2011.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of December 22, 
2011.
    The Director of the Federal Register approved the incorporation by 
reference of certain other publications listed in this AD as of 
November 4, 2010 (75 FR 64636, October 20, 2010).

ADDRESSES: You may examine the AD docket on the Internet at <a href="http://www.regulations.gov">http://www.regulations.gov</a> or in person at the U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC.

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:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an AD that would apply to the specified products. 
That NPRM was published in the Federal Register on June 29, 2011 (76 FR 
38065), and proposed to supersede AD 2010-22-02, Amendment 39-16481 (75 
FR 64636, October 20, 2010). That NPRM proposed to correct an unsafe 
condition for the specified products.
    Since we issued AD 2010-22-02, Amendment 39-16481 (75 FR 64636, 
October 20, 2010), we have determined

[[Page 71242]]

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 Canadian 
Airworthiness Directive CF-2010-24, dated August 3, 2010, this AD 
requires those actions. Also, for airplanes on which Bombardier Service 
Bulletin 601R-29-035, dated May 11, 2010, is done, and a reducer having 
part number MS21916D8-6 installed, this AD requires replacing the 
reducer with a new reducer. We have coordinated with Transport Canada 
Civil Aviation (TCCA) on this issue.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We considered the comments received.

Request for Restatement of All Compliance Requirements of AD 2010-22-
02, Amendment 39-16481 (75 FR 64636, October 20, 2010)

    Comair, Inc. (the commenter) requested that we revise the NPRM (76 
FR 38065, June 29, 2011) to restate all the compliance requirements of 
AD 2010-22-02, Amendment 39-16481 (75 FR 64636, October 20, 2010), and 
reasoned that it is less confusing and more accurate to completely 
restate all the compliance requirements of AD 2010-22-02. The commenter 
expressed that the way the NPRM was written, a copy of AD 2010-22-02 
must be on-hand to fully cross reference between AD 2010-22-02 and the 
NPRM. The commenter stated that as an example, paragraph (h) of the 
NPRM, in part, states: ``Doing the removal of the hydraulic system No. 
3 accumulator in paragraph (o) of this AD is an alternative method of 
compliance with the requirements of this paragraph,'' but that AD 2010-
22-02 actually references paragraph (j) instead of paragraph (o) of the 
NPRM. The commenter explained that the content of paragraphs (j) and 
(m) of AD 2010-22-02 is not included in the NPRM.
    We agree to clarify. We have restated the requirements of AD 2010-
22-02, Amendment 39-16481 (75 FR 64636, October 20, 2010), in this 
final rule. We provided a table in the Change to Existing AD paragraph 
in the NPRM (76 FR 38065, June 29, 2011) to identify and cross-
reference paragraph requirements in AD 2010-22-02 with the 
corresponding paragraph requirements in this AD. That table did not 
identify the paragraphs that did not change from AD 2010-22-02 to the 
NPRM. The actions specified in paragraph (j) of AD 2010-22-02 are 
specified in paragraph (o) of this AD. The actions specified in 
paragraph (m) of AD 2010-22-02 are specified in paragraph (p) of this 
AD. No changes have been made to this AD in this regard.

Request for Clarification of Intent of Paragraph (o) of the NPRM (76 FR 
38065, June 29, 2011)

    The commenter requested that action specified in paragraph (o) of 
the NPRM (76 FR 38065, June 29, 2011) be considered a superseding 
requirement, instead of an ``alternate method of compliance'' for the 
actions specified in paragraph (h) of the NPRM. The commenter did not 
provide a reason for this request.
    We agree that the wording in paragraph (h) of this final rule 
should be revised to clarify the intent of paragraph (o) of this AD. We 
have revised paragraph (h) of this final rule to specify that paragraph 
(o) of this final rule is terminating action instead of an alternative 
method of compliance (AMOC) for the requirements of paragraph (h) of 
this final rule, by replacing ``is an alternate method of compliance'' 
with ``terminates.''

Request for Consideration of Other AMOCs

    The commenter requested that we revise the NPRM (76 FR 38065, June 
29, 2011) to allow for previous AMOCs, which would, among other 
actions, allow for the relocation of the No. 3 Accumulator using ``SB 
601R-29-0 Rev B.'' The commenter proposed that we do this as a separate 
paragraph or optional paragraph, or to include this in paragraph (t)(1) 
of the NPRM.
    For the reasons stated by the commenter, we agree to allow for 
previous approved AMOCs in accordance with AD 2010-22-02, Amendment 39-
16481 (75 FR 64636, October 20, 2010) in this final rule. We have 
revised paragraph (t)(1) of this final rule accordingly.

Conclusion

    We reviewed the available data, including the comments received, 
and determined that air safety and the public interest require adopting 
the AD with the changes described previously. We determined that these 
changes will not increase the economic burden on any operator or 
increase the scope of the AD.

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 required different actions in this AD from those 
in the MCAI in order to follow our FAA policies. Any such differences 
are highlighted in a NOTE within the AD.

Costs of Compliance

    We estimate that this AD will affect about 605 products of U.S. 
registry.
    The actions that are required by AD 2010-22-02, Amendment 39-16481 
(75 FR 64636, October 20, 2010), and retained in this 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 will take about 14 work-hours per product to 
comply with the new basic requirements of this AD. The average labor 
rate is $85 per work-hour. Required parts will 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 parts. 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 this AD to the 
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.

[[Page 71243]]

Regulatory Findings

    We determined that this AD will not have federalism implications 
under Executive Order 13132. This AD will not have a substantial direct 
effect on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government.
    For the reasons discussed above, I certify this AD:
    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 AD and placed it in the AD docket.

Examining the AD Docket

    You may examine the AD docket on the Internet at <a href="http://www.regulations.gov">http://www.regulations.gov</a>; 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 the NPRM (76 FR 38065, June 29, 2011), 
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.

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

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

2011-23-08 Bombardier, Inc.: Amendment 39-16859. Docket No. FAA-
2011-0648; Directorate Identifier 2010-NM-276-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective December 
22, 2011.

Affected ADs

    (b) This AD supersedes AD 2010-22-02, Amendment 39-16481 (75 FR 
64636, October 20, 2010).

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

Restatement of Requirements of AD 2010-22-02, Amendment 39-16481 (75 FR 
64636, OCTOBER 20, 2010), 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, Amendment 39-16481 (75 FR 64636, October 20, 2010)), 
revise the Limitations section, Normal Procedures section, and 
Abnormal Procedures section of the Canadair Regional Jet AFM, CSP A-
012, 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 this AFM, the general revisions may be inserted 
into this 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 
terminates 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 Inspections 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.

[[Page 71244]]



                       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 Bulletin 601R- A..............  May 11, 2010.
                                 29-033, including Appendix A,
                                 dated May 5, 2009.
Inboard and Outboard Brake....  Bombardier Service Bulletin 601R- A..............  May 11, 2010.
                                 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 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-   ..........................  October 18, 2007.
 29-029.
Bombardier Alert Service Bulletin A601R-   A.........................  November 12, 2009.
 29-029.
Bombardier Alert Service Bulletin A601R-   ..........................  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                               Date
------------------------------------------------------------------------
Bombardier Service Bulletin 601R-29-  May 5, 2009.
 033.
Bombardier Service Bulletin 601R-32-  May 5, 2009.
 106.
------------------------------------------------------------------------

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

[[Page 71245]]

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, dated December 8, 2010; or Bombardier Service Bulletin 
601R-32-107, Revision B, dated December 8, 2010; as applicable.

                       Table 5--Bombardier Service Information for Accumulator Replacement
----------------------------------------------------------------------------------------------------------------
          Accumulator                       Document                  Revision                  Date
----------------------------------------------------------------------------------------------------------------
Hydraulic System No. 1........  Bombardier Service Bulletin 601R- ...............  May 11, 2010.
                                 29-035.
Hydraulic System No. 1........  Bombardier Service Bulletin 601R- A..............  December 8, 2010.
                                 29-035.
Inboard and Outboard Brake....  Bombardier Service Bulletin 601R- A..............  June 17, 2010.
                                 32-107.
Inboard and Outboard Brake....  Bombardier Service Bulletin 601R- B..............  December 8, 2010.
                                 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 Alert 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; or Bombardier Service Bulletin 
601R-32-107, Revision A, dated June 17, 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: (1) 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.
    (2) 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. AMOCs approved previously in 
accordance with AD 2010-22-02, Amendment 39-16481 (75 FR 64636, 
October 20, 2010), are approved as AMOCs for the corresponding 
provisions of 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 Manual, CSP A-012; Bombardier Alert Service Bulletin A601R-
29-029, Revision B, dated May 11, 2010, including Appendix A, dated 
October 18, 2007; Bombardier Alert Service Bulletin A601R-29-031, 
Revision A, dated March 26, 2009; Bombardier Alert Service Bulletin 
A601R-32-103, Revision D, dated May 11, 2010, including Appendix A, 
Revision A, dated October 18, 2007; Bombardier Service Bulletin 
601R-29-032, Revision A, dated January 26, 2010; Bombardier Service 
Bulletin 601R-29-033, Revision A, dated May 11, 2010, including 
Appendix A, dated May 5, 2009; Bombardier Service Bulletin 601R-29-
035, Revision A, dated December 8, 2010; Bombardier Service Bulletin 
601R-32-106, Revision A, including Appendix A, dated May 11, 2010; 
and Bombardier Service Bulletin 601R-32-107, Revision B, dated 
December 8, 2010; for related information.

Material Incorporated by Reference

    (v) You must use the following service information, as 
applicable, to do the actions required by this AD, unless the AD 
specifies otherwise. The Director of the Federal Register approved 
the incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (1) Canadair Regional Jet Temporary Revision RJ/186-1, dated 
August 24, 2010, to the Canadair Regional Jet Airplane Flight 
Manual, CSP A-012 (previously approved for incorporation by 
reference on November 4, 2010 (75 FR 64636, October 20, 2010));
    (2) Bombardier Alert Service Bulletin A601R-29-029, Revision B, 
dated May 11, 2010, including Appendix A, dated October 18, 2007 
(previously approved for incorporation by reference on November 4, 
2010 (75 FR 64636, October 20, 2010))*;
    (3) Bombardier Alert Service Bulletin A601R-29-031, Revision A, 
dated March 26, 2009 (previously approved for incorporation by 
reference on November 4, 2010 (75 FR 64636, October 20, 2010));
    (4) Bombardier Alert Service Bulletin A601R-32-103, Revision D, 
dated May 11, 2010, including Appendix A, Revision A, dated October 
18, 2007 (previously approved for incorporation by reference on 
November 4, 2010 (75 FR 64636, October 20, 2010))*;
    (5) Bombardier Service Bulletin 601R-29-032, Revision A, dated 
January 26, 2010 (previously approved for incorporation by reference 
on November 4, 2010 (75 FR 64636, October 20, 2010));
    (6) Bombardier Service Bulletin 601R-29-033, Revision A, dated 
May 11, 2010, including Appendix A, dated May 5, 2009 (previously 
approved for incorporation by reference on November 4, 2010 (75 FR 
64636, October 20, 2010))*;
    (7) Bombardier Service Bulletin 601R-29-035, Revision A, dated 
December 8, 2010 (approved for incorporation by reference on 
December 22, 2011);
    (8) Bombardier Service Bulletin 601R-32-106, Revision A, 
including Appendix A, dated May 11, 2010 (previously approved for 
incorporation by reference on November 4, 2010 (75 FR 64636, October 
20, 2010))*; and
    (9) Bombardier Service Bulletin 601R-32-107, Revision B, dated 
December 8, 2010 (approved for incorporation by reference on 
December 22, 2011).

    Note 4: * In Appendix A to these documents, the document number 
is shown only on page A1 of these appendices.

    (10) For service information identified in this AD, contact 
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, 
Qu[eacute]bec H4S 1Y9, Canada; telephone (514) 855-5000; fax (514) 
855-7401; email

[[Page 71246]]

<a href="/cdn-cgi/l/email-protection#12667a763c716078527377607d3c707d7f707360767b77603c717d7f"><span class="__cf_email__" data-cfemail="1d697579337e6f775d7c786f72337f72707f7c6f7974786f337e7270">[email&#160;protected]</span></a>; Internet <a href="http://www.bombardier.com">http://www.bombardier.com</a>.
    (11) You may review copies of the 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.
    (12) You may also review copies of the 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, call (202) 741-6030, or go to: <a href="http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html">http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html</a>.

    Issued in Renton, Washington, on October 20, 2011.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2011-29680 Filed 11-16-11; 8:45 am]
BILLING CODE 4910-13-P