
[Federal Register: October 20, 2010 (Volume 75, Number 202)]
[Rules and Regulations]               
[Page 64636-64641]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr20oc10-3]                         

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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-1037; Directorate Identifier 2010-NM-202-AD; 
Amendment 39-16481; AD 2010-22-02]
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; request for comments.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for the 
products listed above. 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.
* * * * *
This AD requires actions that are intended to address the unsafe 
condition described in the MCAI.

DATES: This AD becomes effective November 4, 2010.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the AD as of November 4, 
2010.
    We must receive comments on this AD by December 6, 2010.

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.

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 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:

Discussion

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2010-24, dated August 3, 2010 (referred to after this as ``the MCAI''), 
to correct an unsafe condition for the specified products. The 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. The lowest number 
of flight cycles accumulated at the time of failure, to date, has 
been 6,991 flight cycles.
    The part numbers (P/N) of the accumulators currently installed 
on CL-600-2B19 aeroplanes are 601R75138-1 (08-60163-001 or 08-60163-
002) [Hydraulic System No. 1, Hydraulic System No. 2, Inboard Brake 
and Outboard Brake accumulators] and 601R75138-3 (08-60164-001 or 
08-60164-002) [Hydraulic System No. 3 accumulator].
    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.
    This directive gives instructions to amend the Airplane Flight 
Manual (AFM), remove two accumulators (Hydraulic System No. 2 and 
No. 3) from the aeroplane and conduct repetitive ultrasonic 
inspections [for cracks] of the Hydraulic System No. 1, Inboard 
Brake and Outboard Brake accumulators that are not identified by the 
letter ``T'' after the serial number (S/N) on the identification 
plate for cracks until they are replaced by new accumulators P/N 
601R75139-1 (11093-4).

Required actions also include deactivating the hydraulic system No. 3 
accumulator. You may obtain further information by examining the MCAI 
in the AD docket.

Relevant Service Information

    Bombardier has issued Canadair Regional Jet Temporary Revision (TR) 
RJ/186-1, dated August 24, 2010, to the Limitations section, Normal 
Procedures section, and Abnormal Procedures section of the Canadair 
Regional Jet Airplane Flight Manual (AFM), CSP A-012. Canadair Regional 
Jet TR RJ/186-1, dated August 24, 2010, advises the flightcrew that for 
certain airplanes the hydraulic 3B pump is selected ``on'' instead of 
``auto'' for all phases of flight.
    Bombardier has issued the service information in the following 
table:

                                          Bombardier Service Bulletins
----------------------------------------------------------------------------------------------------------------
               Document                               Revision                               Date
----------------------------------------------------------------------------------------------------------------
Bombardier Alert Service Bulletin       B..................................  May 11, 2010.
 A601R-29-029, including Appendix A,
 dated October 18, 2007.
Bombardier Alert Service Bulletin       A..................................  March 26, 2009.
 A601R-29-031.

[[Page 64637]]


Bombardier Alert Service Bulletin       D..................................  May 11, 2010.
 A601R-32-103, including Appendix A,
 Revision A, dated October 18, 2007.
Bombardier Service Bulletin 601R-29-    A..................................  January 26, 2010.
 032.
Bombardier Service Bulletin 601R-29-    A..................................  May 11, 2010.
 033, including Appendix A, dated May
 5, 2009.
Bombardier Service Bulletin 601R-29-    Original...........................  May 11, 2010.
 035.
Bombardier Service Bulletin 601R-32-    A..................................  May 11, 2010.
 106, including Appendix A.
Bombardier Service Bulletin 601R-32-    A..................................  June 17, 2010.
 107.
----------------------------------------------------------------------------------------------------------------

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.

FAA's Determination and Requirements of This 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 issuing this AD because we 
evaluated all pertinent information and determined the unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design.

Differences Between the 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 FAA policies. Any such differences are 
highlighted in a NOTE within the AD.

Explanation of Affected Accumulators

    The actions specified in the MCAI apply only to Tactair 
accumulators. Certain actions in this AD apply to all accumulators. 
This is a result of the unsafe condition, which is due to the location 
of the accumulators and potential damage resulting from the release of 
the accumulator screw cap/end cap. This is the reason for the 
deactivation of the hydraulic system No. 3 accumulator and removal of 
the hydraulic system No. 2 accumulator.

Interim Action

    This AD does 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, in Part IV and Part VII of the 
Canadian Airworthiness Directive CF-2010-24, dated August 3, 2010. The 
planned compliance time for the removal of the hydraulic system No. 3 
accumulator, or replacement of the hydraulic system No. 1, inboard 
brake, and outboard brake accumulators, in Part IV and Part VII of the 
Canadian Airworthiness Directive CF-2010-24, dated August 3, 2010, 
would allow enough time to provide notice and opportunity for prior 
public comment on the merits of those actions. Therefore, we are 
considering further rulemaking to address this issue.

FAA's Determination of the Effective Date

    An unsafe condition exists that requires the immediate adoption of 
this AD. The FAA has found that the risk to the flying public justifies 
waiving notice and comment prior to adoption of this rule because seven 
cases of on-ground hydraulic accumulator screw cap/end cap failure have 
been experienced on Model CL-600-2B19 airplanes, resulting in the loss 
of the associated hydraulic system and high-energy impact damage to 
adjacent systems and structure. The lowest number of flight cycles 
accumulated at the time of failure, to date, has been 6,991 flight 
cycles.
    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, fuel 
lines and wires included. Although all of the failures to date have 
occurred on the ground, an in-flight failure affecting such components 
could consequently reduce the controllability of the airplane. 
Therefore, we determined that notice and opportunity for public comment 
before issuing this AD are impracticable and that good cause exists for 
making this amendment effective in fewer than 30 days.

Comments Invited

    This AD is a final rule that involves requirements affecting flight 
safety, and we did not precede it by notice and opportunity for public 
comment. We invite you to send any written relevant data, views, or 
arguments about this AD. Send your comments to an address listed under 
the ADDRESSES section. Include ``Docket No. FAA-2010-1037; Directorate 
Identifier 2010-NM-202-AD'' at the beginning of your comments. We 
specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of this AD. We will consider all 
comments received by the closing date and may amend this AD because of 
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 AD.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    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 64638]]

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.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

0
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 adding the following new AD:

2010-22-02 Bombardier, Inc.: Amendment 39-16481. Docket No. FAA-
2010-1037; Directorate Identifier 2010-NM-202-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective November 4, 
2010.

Affected ADs

    (b) None.

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 continued 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.

Airplane Flight Manual (AFM) Revision

    (g) Within 30 days after the effective date of this AD, 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(s) 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 the TR has been included in the 
general revisions of the AFM, the general revisions may be inserted 
into the AFM, and the 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 the effective date of this AD, 
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 (j) 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 the effective date of this AD, 
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.

Optional Removal of the Hydraulic System No. 3 Accumulator

    (j) Removal of 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, 
is an alternate method of compliance with the requirements of paragraph 
(h) of this AD.

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

    (k) 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 (k)(1) and (k)(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 (m) of this AD is done. If 
any crack is found, before further flight, replace the accumulator with 
a new accumulator having part number (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 64639]]



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

     (l) 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 (k) of this AD at the applicable 
time in paragraph (l)(1), (l)(2), and (l)(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 the effective date of this AD: 
Inspect within 500 flight cycles after the effective date of this AD.
    (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 the effective date of this AD: 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 the effective date of this AD.

    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 (k) of this AD, the inspection specified in paragraph (k) 
of this AD is not required.

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

    (m) Replacing 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 3 of this AD, is a terminating 
action for the inspections in paragraph (k) of this AD for that 
accumulator.

                       Table 3--Bombardier Service Information for Accumulator Replacement
----------------------------------------------------------------------------------------------------------------
          Accumulator                  Document                   Revision                       Date
----------------------------------------------------------------------------------------------------------------
Hydraulic System No. 1........  Bombardier Service      Original...................  May 11, 2010.
                                 Bulletin 601R-29-035.
Inboard and Outboard Brake....  Bombardier Service      A..........................  June 17, 2010.
                                 Bulletin 601R-32-107.
----------------------------------------------------------------------------------------------------------------

Credit for Actions Accomplished in Accordance With Previous Service 
Information

    (n) Deactivating the hydraulic system No. 3 accumulator before the 
effective date of this AD 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.
    (o) 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 the effective date of this 
AD is acceptable for compliance with the requirements of paragraph (i) 
of this AD.
    (p) 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 the effective 
date of this AD is acceptable for compliance with the requirements of 
paragraph (j) of this AD.
    (q) An ultrasonic inspection for cracks done before the effective 
date of this AD in accordance with Part B of the Accomplishment 
Instructions of the applicable service bulletin identified in Table 4 
of this AD, or the Accomplishment Instructions of the applicable 
service bulletin identified in Table 5 of this AD, is acceptable for 
compliance with the corresponding ultrasonic inspection required by 
paragraph (k) of this AD.

[[Page 64640]]



                    Table 4--Bombardier Credit Service Information for Accumulator Inspection
----------------------------------------------------------------------------------------------------------------
               Document                               Revision                               Date
----------------------------------------------------------------------------------------------------------------
Bombardier Alert Service Bulletin       Original...........................  October 18, 2007.
 A601R-29-029.
Bombardier Alert Service Bulletin       A..................................  November 12, 2009.
 A601R-29-029.
Bombardier Alert Service Bulletin       Original...........................  November 21, 2006.
 A601R-32-103.
Bombardier Alert Service Bulletin       A..................................  March 7, 2007.
 A601R-32-103.
Bombardier Alert Service Bulletin       B..................................  October 18, 2007.
 A601R-32-103.
Bombardier Alert Service Bulletin       C..................................  February 26, 2009.
 A601R-32-103.
----------------------------------------------------------------------------------------------------------------


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

    (r) Replacing any hydraulic system No. 1, inboard brake, or 
outboard brake accumulator before the effective date of this AD 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 (m) of this AD.

FAA AD Differences

    Note 3: This AD differs from the MCAI and/or service information as 
follows:
    (1) This AD does 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, in Part IV and Part VII 
of the Canadian Airworthiness Directive CF-2010-24, dated August 3, 
2010.
    (2) 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) and (i) of this AD apply to all 
accumulators in the positions specified in paragraphs (h) and (i) of 
this AD.

Other FAA AD Provisions

    (s) 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 on any airplane to 
which the AMOC applies, notify your principal maintenance inspector 
(PMI) or principal avionics inspector (PAI), as appropriate, or lacking 
a principal inspector, your local Flight Standards 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.
    (3) Reporting Requirements: For any reporting requirement in this 
AD, under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501 
et seq.), the Office of Management and Budget (OMB) has approved the 
information collection requirements and has assigned OMB Control Number 
2120-0056.

Related Information

    (t) 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; and the service bulletins listed in Table 6 
of this AD; for related information.

                                     Table 6--Bombardier Service Information
----------------------------------------------------------------------------------------------------------------
               Document                               Revision                               Date
----------------------------------------------------------------------------------------------------------------
Bombardier Alert Service Bulletin       B..................................  May 11, 2010.
 A601R-29-029.
Bombardier Alert Service Bulletin       A..................................  March 26, 2009.
 A601R-29-031.
Bombardier Alert Service Bulletin       D..................................  May 11, 2010.
 A601R-32-103.
Bombardier Service Bulletin 601R-29-    A..................................  January 26, 2010.
 032.
Bombardier Service Bulletin 601R-29-    A..................................  May 11, 2010.
 033.
Bombardier Service Bulletin 601R-29-    Original...........................  May 11, 2010.
 035.
Bombardier Service Bulletin 601R-32-    A..................................  May 11, 2010.
 106.
Bombardier Service Bulletin 601R-32-    A..................................  June 17, 2010.
 107.
----------------------------------------------------------------------------------------------------------------

Material Incorporated by Reference

    (u) You must use Canadair Regional Jet Temporary Revision RJ/186-1, 
dated August 24, 2010, to the Canadair Regional Jet Airplane Flight 
Manual, CSP A-012, and the service information identified in Table 7 of 
this AD to do the actions required by this AD, unless the AD specifies 
otherwise. If you accomplish the optional terminating actions specified 
in this AD, you must use the service information identified in Table 8 
of this AD to perform those actions, unless the AD specifies otherwise.

[[Page 64641]]



                   Table 7--Material Incorporated By Reference for Actions Required in This AD
----------------------------------------------------------------------------------------------------------------
               Document                               Revision                               Date
----------------------------------------------------------------------------------------------------------------
Bombardier Alert Service Bulletin       B..................................  May 11, 2010.
 A601R-29-029, including Appendix A,
 dated October 18, 2007 .*.
Bombardier Alert Service Bulletin       A..................................  March 26, 2009.
 A601R-29-031.
Bombardier Alert Service Bulletin       D..................................  May 11, 2010.
 A601R-32-103, including Appendix A,
 Revision A, dated October 18, 2007.*
Bombardier Service Bulletin 601R-29-    A..................................  January 26, 2010.
 032.
Bombardier Service Bulletin 601R-29-    A..................................  May 11, 2010.
 033, including Appendix A, dated May
 5, 2009 .*
Bombardier Service Bulletin 601R-32-    A..................................  May 11, 2010.
 106, including Appendix A .*
----------------------------------------------------------------------------------------------------------------
(* In Appendix A to these documents, the document number is shown only on page A1 of these appendices.)


                 Table 8--Material Incorporated by Reference for the Optional Actions in This AD
----------------------------------------------------------------------------------------------------------------
               Document                               Revision                               Date
----------------------------------------------------------------------------------------------------------------
Bombardier Alert Service Bulletin       A..................................  March 26, 2009.
 A601R-29-031.
Bombardier Service Bulletin 601R-29-    Original...........................  May 11, 2010.
 035.
Bombardier Service Bulletin 601R-32-    A..................................  June 17, 2010.
 107.
----------------------------------------------------------------------------------------------------------------

     (1) 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.
    (2) 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; e-mail 
thd.crj@aero.bombardier.com; Internet http://www.bombardier.com.
    (3) 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.
    (4) 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: http://www.archives.gov/
federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on October 7, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2010-26225 Filed 10-19-10; 8:45 am]
BILLING CODE 4910-13-P

