Airworthiness Directives; Bombardier, Inc. Airplanes, 57998-58001 [2012-22042]

Agencies

• Federal Aviation Administration
• DEPARTMENT OF TRANSPORTATION

[Federal Register Volume 77, Number 182 (Wednesday, September 19, 2012)]
[Rules and Regulations]
[Pages 57998-58001]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-22042]



[[Page 57998]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2012-0142; Directorate Identifier 2010-NM-275-AD; 
Amendment 39-17188; AD 2012-18-11]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Airplanes

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

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 
702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional 
Jet Series 900) airplanes. This AD was prompted by reports of failures 
of a hydraulic accumulator's screw-cap/end cap while on the ground that 
resulted in loss of use of that hydraulic system, and in high-energy 
impact damage to adjacent systems and structures. This AD requires an 
inspection for part numbers; repetitive inspections for any cracking of 
certain hydraulic system accumulators, and replacement, if necessary; 
and revising the maintenance program to include a life limit for 
certain hydraulic system accumulators. We are issuing this AD to 
prevent loss of use of a hydraulic system, which could result in 
reduced controllability of the airplane.

DATES: This AD becomes effective October 24, 2012.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of October 24, 
2012.

ADDRESSES: You may examine the AD docket on the Internet at https://www.regulations.gov 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: Cesar Gomez, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7318; 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 March 20, 2012 (77 
FR 16193). That NPRM proposed 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 
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.
    Although there have been no failures to date on any CL-600-2C10, 
CL-600-2D15 or CL-600-2D24 aeroplanes, similar accumulators to those 
installed on the CL-600-2B19, are installed. The part numbers (P/Ns) 
of the accumulators installed on CL-600-2C10, CL-600-2D15 and CL-
600-2D24 aeroplanes are 900096-1 (Hydraulic System No. 1 and 
Hydraulic System No. 2 accumulators), 900097-1 (Hydraulic System No. 
3 accumulator) and 08-60204-001 (Inboard Brake and Outboard Brake 
accumulators).
    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 [Canadian] directive gives instructions to conduct [an 
inspection to determine if certain hydraulic accumulators are 
installed and, if necessary,] repetitive ultrasonic inspections [for 
cracking] of the Hydraulic System No. 1, Hydraulic System No. 2, 
Hydraulic System No. 3, Inboard Brake and Outboard Brake 
accumulators, P/Ns 900096-1, 900097-1, and 08-60204-001, that are 
not identified by the letter ``M'' or ``T'' after the S/N [serial 
number] on the identification plate.
* * * * *
Required actions include revising the maintenance program to include a 
life limit for certain accumulators, and for airplanes on which 
cracking is found during an ultrasonic inspection, replacing the 
accumulator with a new accumulator containing the letter ``M'' or 
``T'', as applicable, after the serial number on the identification 
plate or with a new accumulator with a different part number, and 
eventual replacement of certain accumulators with new accumulators. You 
may obtain further information by examining the MCAI in the AD docket.

Comments

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

Request To Reference Most Recent Service Information

    Comair Inc. (Comair) requested that we reference the most recent 
service information. Comair also stated that the revised service 
information has no effect on airplanes on which inspections, 
replacements, or maintenance program revisions were accomplished using 
the previous issues that were identified in the NPRM (77 FR 16193, 
March 20, 2012).
    We agree to reference the most recent service information of 
certain service bulletins as identified below.
     Bombardier Alert Service Bulletin A670BA-29-011, Revision 
B, dated December 22, 2010, including Appendix A, Revision A, dated 
July 27, 2010 (for hydraulic system No. 1, and hydraulic system No. 2 
accumulators).
     Bombardier Alert Service Bulletin A670BA-29-012, Revision 
B, dated December 22, 2010, including Appendix A, Revision A, dated 
July 27, 2010 (for hydraulic system No. 3 accumulators).
     Bombardier Alert Service Bulletin A670BA-32-021, Revision 
D, dated December 22, 2010, including Appendix A, Revision A, dated 
October 18, 2007 (for inboard and outboard brake accumulators).
     Bombardier Service Bulletin 670BA-29-013, Revision B, 
dated December 22, 2010, including Appendix A, dated January 29, 2010 
(for hydraulic system No. 1, and hydraulic system No. 2 accumulators).
     Bombardier Service Bulletin 670BA-32-026, Revision B, 
dated December 22, 2010, including Appendix A, dated January 29, 2010 
(for inboard and outboard brake accumulators).
     Bombardier Service Bulletin 670BA-32-028, Revision A, 
dated February 3, 2011 (for inboard brake and outboard brake 
accumulators).
    This revised service information does not add more work to the 
actions described in the NPRM (77 FR 16193, March 20, 2012). We have 
revised paragraphs (i), (p), (q), and (t) of this AD accordingly.

Request To Include an Alternative Method of Compliance (AMOC) for a 
Different Part Number (P/N)

    Tactair Fluid Controls (Tactair) requested that we include a 
hydraulic accumulator having P/N 11093-4 as an AMOC for replacing 
hydraulic accumulators having P/N 08-60204-001. Tactair noted that more 
than half

[[Page 57999]]

of the airplanes in the Model CL-600-2B19 fleet have been retrofitted 
to P/N 11093-4. Tactair also indicated that allowing use of P/N 11093-4 
would be more economical for operators.
    We disagree with the commenter's request. Part number 11093-4 has 
not yet been certified for use on Model CL-600-2C10 (Regional Jet 
Series 700, 701, & 702), CL-600-2D15 (Regional Jet Series 705), or CL-
600-2D24 (Regional Jet Series 900) airplanes. Approval of AMOCs 
provides alternative methods of compliance to the methods required to 
be used in the associated AD. An AMOC is issued only after an AD has 
been issued and only after data are provided to show that the proposed 
solution is complete and addresses the unsafe condition. Once we issue 
this AD, any person may request approval of an AMOC under the 
provisions of paragraph (s)(1) of this AD. We have not changed this AD 
in this regard.

Updated Credit Language

    We have revised the heading and wording for paragraph (q) of this 
AD to provide appropriate credit for previous accomplishment of certain 
actions. This change does not affect the intent of that paragraph.

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.

Costs of Compliance

    We estimate that this AD will affect 389 products of U.S. registry. 
We also estimate that it will take up to 21 work-hours per product to 
comply with the basic requirements of this AD. The average labor rate 
is $85 per work-hour. Required parts will cost about $8,988 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 up to $4,190,697, or $10,773 per product, per 
inspection cycle.
    In addition, we estimate that any necessary follow-on actions would 
take up to 7 work-hours and require parts costing $8,988, for a cost of 
$9,583 per product. We have no way of determining the number of 
products that may need these actions.

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 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 that 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);
    3. Will not affect intrastate aviation in Alaska; and
    4. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket.

Examining the AD Docket

    You may examine the AD docket on the Internet at https://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 the NPRM (77 FR 16193, March 20, 
2012), 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 adding the following new AD:

2012-18-11 Bombardier, Inc.: Amendment 39-17188. Docket No. FAA-
2012-0142; Directorate Identifier 2010-NM-275-AD.

(a) Effective Date

    This airworthiness directive (AD) becomes effective October 24, 
2012.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to the airplanes identified in paragraphs (c)(1) 
and (c)(2) of this AD, certificated in any category.
    (1) Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 
701, & 702) airplanes, with serial number (S/N) 10003 through 10314 
inclusive.
    (2) Bombardier, Inc. Model CL-600-2D15 (Regional Jet Series 705) 
and CL-600-2D24 (Regional Jet Series 900) airplanes, with S/N 15001 
through 15259 inclusive.

(d) Subject

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

(e) Reason

    This AD was prompted by reports of failures of a hydraulic 
accumulator's screw-cap/end cap while on the ground that resulted in 
loss of use of that hydraulic system, and in high-energy impact 
damage to adjacent systems and structures. We are issuing this AD to 
prevent loss of use of a hydraulic system, which could result in 
reduced controllability of the airplane.

(f) Compliance

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

(g) Inspection for Part Numbers (P/Ns)

    At the applicable time specified in paragraphs (g)(1), (g)(2), 
and (g)(3) of this AD, inspect the hydraulic accumulators in 
hydraulic systems No. 1, No. 2, and No. 3, and the inboard and 
outboard brake systems, to determine the part number of the

[[Page 58000]]

accumulator. A review of airplane maintenance records is acceptable 
in lieu of this inspection if the part number of the accumulator can 
be conclusively determined from that review.
    (1) For an accumulator with more than 4,500 total flight cycles 
as of the effective date of this AD, inspect that accumulator within 
500 flight cycles after the effective date of this AD.
    (2) For an accumulator with 4,500 or less total flight cycles as 
of the effective date of this AD, inspect that accumulator before it 
has accumulated 5,000 total flight cycles.
    (3) If it is not possible to determine the total flight cycles 
accumulated on an accumulator, inspect that accumulator within 500 
flight cycles after the effective date of this AD.

(h) Inspection for Letter Designation After the Serial Number

    If, during an inspection required by paragraph (g) of this AD, 
an accumulator having P/N 900096-1 (for hydraulic systems No. 1 and 
No. 2 accumulators), 900097-1 (for hydraulic system No. 3 
accumulator), or 08-60204-001 (for inboard and outboard brake 
accumulators) is found, at the applicable time specified in 
paragraphs (g)(1), (g)(2), and (g)(3) of this AD, do an inspection 
of the identification plate on the hydraulic accumulator to 
determine if an ``M'' (for hydraulic system accumulators) or a ``T'' 
(for brake system accumulators) follows the serial number on the 
identification plate. A review of airplane maintenance records is 
acceptable in lieu of this inspection if the part number and the 
letter of the accumulator can be conclusively determined from that 
review.

    Note 1 to paragraphs (h), (i), (k), (l)(2), and (m) of this AD:  
The letter ``M'' after the serial number on the identification plate 
is applicable to accumulators, P/Ns 900096-1 and 900097-1, on 
hydraulic systems No. 1, No. 2, and No. 3. The letter ``T'' after 
the serial number on the identification plate is applicable to 
accumulators, P/N 08-60204-001, on the brake system.

(i) Initial Ultrasonic Inspections of Hydraulic System No. 1, Hydraulic 
System No. 2, Hydraulic System No. 3, Inboard Brake, and Outboard Brake 
Accumulators

    If, during any inspection required by paragraph (h) of this AD, 
any accumulator without the letter ``M'' (for hydraulic system 
accumulators) or a ``T'' (for brake system accumulators) after the 
serial number is found, at the applicable time specified in 
paragraph (g)(1), (g)(2), or (g)(3) of this AD: Do an ultrasonic 
inspection of the inner shoulders of the accumulator screw-cap for 
cracking, in accordance with Part B of the Accomplishment 
Instructions of the applicable Bombardier service bulletin 
identified in paragraphs (i)(1), (i)(2), and (i)(3) of this AD, and 
at the internal threads of the screw-caps, in accordance with the 
Accomplishment Instructions of the applicable Bombardier service 
bulletin identified in paragraphs (i)(4), (i)(5), and (i)(6) of this 
AD.
    (1) For hydraulic system No. 1, and hydraulic system No. 2 
accumulators: Bombardier Alert Service Bulletin A670BA-29-011, 
Revision B, dated December 22, 2010, including Appendix A, Revision 
A, dated July 27, 2010.
    (2) For hydraulic system No. 3 accumulators: Bombardier Alert 
Service Bulletin A670BA-29-012, Revision B, dated December 22, 2010, 
including Appendix A, Revision A, dated July 27, 2010.
    (3) For inboard brake and outboard brake accumulators: 
Bombardier Alert Service Bulletin A670BA-32-021, Revision D, dated 
December 22, 2010, including Appendix A, Revision A, dated October 
18, 2007.
    (4) For hydraulic system No. 1 accumulators: Bombardier Service 
Bulletin 670BA-29-013, Revision B, dated December 22, 2010, 
including Appendix A, dated January 29, 2010.
    (5) For hydraulic system No. 2 accumulators: Bombardier Service 
Bulletin 670BA-29-013, Revision B, dated December 22, 2010, 
including Appendix A, dated January 29, 2010.
    (6) For inboard brake and outboard brake accumulators: 
Bombardier Service Bulletin 670BA-32-026, Revision B, dated December 
22, 2010, including Appendix A, dated January 29, 2010.

(j) No Cracking Found During Accomplishment of the Actions Required by 
Paragraph (i) of This AD

    If no cracking is found during the inspections required by 
paragraph (i) of this AD, do the actions required by paragraph (l) 
of this AD.

(k) Cracking Found During Accomplishment of the Actions Required by 
Paragraph (i) of This AD

    If any cracking is found during the inspections required by 
paragraph (i) of this AD, before further flight, replace the 
accumulator with a new accumulator containing the letter ``M'' or 
``T'', as applicable, after the serial number on the identification 
plate, in accordance with the Accomplishment Instructions of the 
applicable service bulletin identified in paragraphs (i)(1) through 
(i)(6) of this AD, or replace the accumulator with a new accumulator 
as specified in paragraphs (k)(1) through (k)(3) of this AD, as 
applicable.
    (1) For any cracked hydraulic system No. 1 or No. 2 accumulator, 
replace the cracked accumulator with a new accumulator, P/N 900121-
1, in accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 670BA-29-014, dated December 22, 2010.
    (2) For any cracked hydraulic system No. 3 accumulator, replace 
the cracked accumulator with a new accumulator, P/N 900122-1, in 
accordance with paragraph (o) of this AD.
    (3) For any cracked inboard brake or outboard brake accumulator, 
replace the cracked accumulator with a new accumulator, P/N 
90006691, in accordance with paragraph (p) of this AD.

(l) Repetitive Ultrasonic Inspections of Hydraulic System No. 1, 
Hydraulic System No. 2, Hydraulic System No. 3, Inboard Brake, and 
Outboard Brake Accumulators

    For each accumulator on which no cracking was found during any 
inspection required by paragraph (i) of this AD, within 500 flight 
cycles after the previous ultrasonic inspection, inspect the 
accumulator in accordance with paragraph (i) of this AD.
    (1) If no cracking is found, do the actions required by 
paragraph (l) of this AD and repeat thereafter at intervals not to 
exceed 500 flight cycles.
    (2) If any cracking is found, before further flight, replace the 
accumulator with a new accumulator containing the letter ``M'' or 
``T,'' as applicable, after the serial number on the identification 
plate, in accordance with the Accomplishment Instructions of the 
applicable service bulletin identified in paragraphs (i)(1) through 
(i)(6) of this AD, or replace the accumulator with a new accumulator 
as specified in paragraphs (k)(1), (k)(2), and (k)(3) of this AD, as 
applicable.

(m) Replacement of Hydraulic System No. 1 and No. 2 Accumulators

    For airplanes on which a hydraulic system No. 1 or No. 2 
accumulator having P/N 900096-1 without the letter ``M'' after the 
serial number is installed: At the applicable time specified in 
paragraphs (m)(1) and (m)(2) of this AD, replace the accumulator 
with a new accumulator having P/N 900096-1 with the letter ``M'' 
after the serial number; or having P/N 900121-1, in accordance with 
the Accomplishment Instructions of Bombardier Service Bulletin 
670BA-29-014, dated December 22, 2010.
    (1) For an accumulator with more than 19,500 total flight cycles 
as of the effective date of this AD, replace that accumulator within 
500 flight cycles after accomplishing the most recent inspection 
required by paragraph (i) or (l) of this AD.
    (2) For an accumulator with 19,500 or less total flight cycles 
as of the effective date of this AD, replace that accumulator before 
it has accumulated 20,000 total flight cycles.
    (3) If it is not possible to determine the total flight cycles 
accumulated on an accumulator, replace that accumulator within 500 
flight cycles after accomplishing the most recent ultrasonic 
inspection required by paragraph (i) or (l) of this AD.

(n) Hydraulic System Safe Life Limit Introduction

    Within 60 days after the effective date of this AD, revise the 
maintenance program to include a safe life limit for the hydraulic 
system No. 1 and No. 2 accumulators, P/N 900096-1, by incorporating 
Tasks 29-11-11-000-801 and 29-11-11-400-801 of Section 1.3--Safe 
Life Components, of Part 2, Airworthiness Limitations, Revision 11, 
dated October 20, 2010, of the Bombardier CL-600-2C10, CL-600-2D15, 
CL-600-2D24, CL-600-2E25 Maintenance Requirements Manual, CSP B-053.

(o) Replacement of Hydraulic System No. 3 Accumulator

    Within 4,000 flight cycles or 24 months after the effective date 
of this AD, whichever occurs first, replace any hydraulic system No. 
3 accumulator having P/N 900097-1 with a new accumulator having P/N 
900122-1, in accordance with the Accomplishment Instructions of 
Bombardier Service Bulletin 670BA-29-015, dated December 22, 2010.

[[Page 58001]]

(p) Replacement of Inboard or Outboard Brake System Accumulators

    Within 4,000 flight cycles or 24 months after the effective date 
of this AD, whichever occurs first, replace any inboard or outboard 
brake system accumulator having P/N 08-60204-001 with a new 
accumulator having P/N 90006691, in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-
028, Revision A, dated February 3, 2011.

(q) Credit for Previous Actions

    (1) This paragraph provides credit for the actions required by 
paragraph (i) of this AD, if those actions were performed before the 
effective date of this AD using Part B of the Accomplishment 
Instructions of the Bombardier service bulletin identified in 
paragraph (q)(1)(i), (q)(1)(ii), (q)(1)(iii), (q)(1)(iv), (q)(1)(v), 
(q)(1)(vi), (q)(1)(vii), or (q)(1)(viii) of this AD.
    (i) Bombardier Alert Service Bulletin A670BA-29-011, dated 
October 18, 2007.
    (ii) Bombardier Alert Service Bulletin A670BA-29-011, Revision 
A, dated July 27, 2010.
    (iii) Bombardier Alert Service Bulletin A670BA-29-012, dated 
March 13, 2008.
    (iv) Bombardier Alert Service Bulletin A670BA-29-012, Revision 
A, dated July 27, 2010.
    (v) Bombardier Alert Service Bulletin A670BA-32-021, dated 
November 21, 2006.
    (vi) Bombardier Alert Service Bulletin A670BA-32-021, Revision 
A, dated March 7, 2007.
    (vii) Bombardier Alert Service Bulletin A670BA-32-021, Revision 
B, dated October 18, 2007.
    (viii) Bombardier Service Bulletin A670BA-32-021, Revision C, 
dated July 27, 2010.
    (2) This paragraph provides credit for the actions required by 
paragraphs (i) and (p) of this AD, if those actions were performed 
before the effective date of this AD using the Accomplishment 
Instructions of the Bombardier service bulletin identified in 
paragraph (q)(2)(i), (q)(2)(ii), (q)(2)(iii), (q)(2)(iv), or 
(q)(2)(v) of this AD.
    (i) Bombardier Service Bulletin 670BA-29-013, dated January 29, 
2010.
    (ii) Bombardier Service Bulletin 670BA-29-013, Revision A, dated 
July 27, 2010.
    (iii) Bombardier Service Bulletin 670BA-32-026, dated January 
29, 2010.
    (iv) Bombardier Service Bulletin 670BA-32-026, Revision A, dated 
July 27, 2010.
    (v) Bombardier Service Bulletin 670BA-32-028, dated December 22, 
2010.

(r) Terminating Actions

    Accomplishing the actions required by paragraphs (m), (n), (o), 
and (p) of this AD terminates the requirements of this AD for the 
accumulator at that location only.

(s) Other FAA AD Provisions

    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. In accordance with 14 CFR 39.19, 
send your request to your principal inspector or local Flight 
Standards District Office, as appropriate. If sending information 
directly to the manager of the ACO, send it 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.

(t) Related Information

    Refer to Mandatory Continuing Airworthiness Information (MCAI) 
Canadian Airworthiness Directive CF-2010-35R1, dated June 28, 2011, 
and the service information identified in paragraphs (t)(1) through 
(t)(9) of this AD, for related information.
    (1) Bombardier Alert Service Bulletin A670BA-29-011, Revision B, 
dated December 22, 2010, including Appendix A, Revision A, dated 
July 27, 2010.
    (2) Bombardier Alert Service Bulletin A670BA-29-012, Revision B, 
dated December 22, 2010, including Appendix A, Revision A, dated 
July 27, 2010.
    (3) Bombardier Alert Service Bulletin A670BA-32-021, Revision D, 
dated December 22, 2010, including Appendix A, Revision A, dated 
October 18, 2007.
    (4) Bombardier Service Bulletin 670BA-29-013, Revision B, dated 
December 22, 2010, including Appendix A, dated January 29, 2010.
    (5) Bombardier Service Bulletin 670BA-32-026, Revision B, dated 
December 22, 2010, including Appendix A, dated January 29, 2010.
    (6) Bombardier Service Bulletin 670BA-29-014, dated December 22, 
2010.
    (7) Bombardier Service Bulletin 670BA-29-015, dated December 22, 
2010.
    (8) Bombardier Service Bulletin 670BA-32-028, Revision A, dated 
February 3, 2011.
    (9) Tasks 29-11-11-000-801 and 29-11-11-400-801 of Section 1.3--
Safe Life Components, of Part 2, Airworthiness Limitations, Revision 
11, dated October 20, 2010, of the Bombardier CL-600-2C10, CL-600-
2D15, CL-600-2D24, CL-600-2E25 Maintenance Requirements Manual, CSP 
B-053.

(u) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the following service 
information under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use the following service information to do the 
actions required by this AD, unless the AD specifies otherwise.
    (i) Bombardier Alert Service Bulletin A670BA-29-011, Revision B, 
dated December 22, 2010, including Appendix A, Revision A, dated 
July 27, 2010.
    (ii) Bombardier Alert Service Bulletin A670BA-29-012, Revision 
B, dated December 22, 2010, including Appendix A, Revision A, dated 
July 27, 2010.
    (iii) Bombardier Alert Service Bulletin A670BA-32-021, Revision 
D, dated December 22, 2010, including Appendix A, Revision A, dated 
October 18, 2007.
    (iv) Bombardier Service Bulletin 670BA-29-013, Revision B, dated 
December 22, 2010, including Appendix A, dated January 29, 2010.
    (v) Bombardier Service Bulletin 670BA-32-026, Revision B, dated 
December 22, 2010, including Appendix A, dated January 29, 2010.
    (vi) Bombardier Service Bulletin 670BA-29-014, dated December 
22, 2010.
    (vii) Bombardier Service Bulletin 670BA-29-015, dated December 
22, 2010.
    (viii) Bombardier Service Bulletin 670BA-32-028, Revision A, 
dated February 3, 2011.
    (ix) Tasks 29-11-11-000-801 and 29-11-11-400-801 of Section 
1.3--Safe Life Components, of Part 2, Airworthiness Limitations, 
Revision 11, dated October 20, 2010, of the Bombardier CL-600-2C10, 
CL-600-2D15, CL-600-2D24, CL-600-2E25 Maintenance Requirements 
Manual, CSP B-053.
    (3) 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 thd.crj@aero.bombardier.com; Internet https://www.bombardier.com.
    (4) You may review copies of the service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. 
For information on the availability of this material at the FAA, 
call 425-227-1221.
    (5) 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 an NARA facility, call 202-741-6030, or go to https://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on August 31, 2012.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2012-22042 Filed 9-18-12; 8:45 am]
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