[Federal Register Volume 77, Number 54 (Tuesday, March 20, 2012)]
[Proposed Rules]
[Pages 16193-16196]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2012-6622]
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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]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc. Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: We propose to adopt 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 proposed 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 proposed AD would require 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 proposing this AD to prevent loss of use of
a hydraulic system, which could result in reduced controllability of
the airplane.
DATES: We must receive comments on this proposed AD by May 4, 2012.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
Fax: (202) 493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC 20590.
Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
For service information identified in this proposed 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
[email protected]; Internet http://www.bombardier.com. You
may review copies of the referenced service information at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton,
Washington. For information on the availability of this material at the
FAA, call 425-227-1221.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Operations office (telephone (800) 647-5527) is
in the ADDRESSES section. Comments will be available in the AD docket
shortly after receipt.
FOR FURTHER INFORMATION CONTACT: 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:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include ``Docket No. FAA-2012-0142;
Directorate Identifier 2010-NM-275-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD based on those comments.
We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
Discussion
The Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2010-35R1, dated June 28, 2011 (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
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
[[Page 16194]]
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.
Relevant Service Information
Bombardier has issued the following service information.
Bombardier Alert Service Bulletin A670BA-29-011, Revision
A, dated July 27, 2010, including Appendix A, Revision A, dated July
26, 2010.
Bombardier Alert Service Bulletin A670BA-29-012, including
Appendix A, Revision A, dated July 27, 2010.
Bombardier Service Bulletin A670BA-32-021, Revision C,
dated July 27, 2010, including Appendix A, Revision A, dated October
18, 2007.
Bombardier Service Bulletin 670BA-29-013, Revision A,
dated July 27, 2010, including Appendix A, dated January 29, 2010.
Bombardier Service Bulletin 670BA-32-026, Revision A,
dated July 27, 2010, including Appendix A, dated January 29, 2010.
Bombardier Service Bulletin 670BA-29-014, dated December
22, 2010.
Bombardier Service Bulletin 670BA-29-015, dated December
22, 2010.
Bombardier Service Bulletin 670BA-32-028, dated December
22, 2010.
Tasks 29-11-11-000-801 and 29-11-11-400-801 of Section
1.3, Safe Life Components, of Part 2, Airworthiness Limitations, of the
Bombardier CL-600-2C10, CL-600-2D15, CL-600-2D24, CL-600-2E25
Maintenance Requirements Manual, CSP B-053, Revision 11, dated October
20, 2010.
The actions described in this service information are intended to
correct the unsafe condition identified in the MCAI.
FAA's Determination and Requirements of This Proposed AD
This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to our bilateral agreement with the State of Design Authority, we have
been notified of the unsafe condition described in the MCAI and service
information referenced above. We are proposing this AD because we
evaluated all pertinent information and determined an unsafe condition
exists and is likely to exist or develop on other products of the same
type design.
Costs of Compliance
Based on the service information, we estimate that this proposed AD
would affect about 389 products of U.S. registry. We also estimate that
it would take up to 21 work-hours per product to comply with the basic
requirements of this proposed AD. The average labor rate is $85 per
work-hour. Required parts would 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 the proposed AD on 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 proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify this proposed
regulation:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979);
3. Will not affect intrastate aviation in Alaska; and
4. Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
We prepared a regulatory evaluation of the estimated costs to
comply with this proposed AD and placed it in the AD docket.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new AD:
Bombardier, Inc.: Docket No. FAA-2012-0142; Directorate Identifier
2010-NM-275-AD.
[[Page 16195]]
(a) Comments Due Date
We must receive comments by May 4, 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 the
hydraulic systems No. 1, No. 2, and No. 3, and the inboard and
outboard brake systems, to determine the part number of the
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): 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 A, dated July 27, 2010, including Appendix A, Revision A,
dated July 26, 2010.
(2) For hydraulic system No. 3 accumulators: Bombardier Alert
Service Bulletin A670BA-29-012, including Appendix A, Revision A,
dated July 27, 2010.
(3) For inboard brake, outboard brake accumulators: Bombardier
Service Bulletin A670BA-32-021, Revision C, dated July 27, 2010,
including Appendix A, Revision A, dated October 18, 2007.
(4) For hydraulic system No. 1 accumulators: Bombardier Service
Bulletin 670BA-29-013, Revision A, dated July 27, 2010, including
Appendix A, dated January 29, 2010.
(5) For hydraulic system No. 2 accumulators: Bombardier Service
Bulletin 670BA-29-013, Revision A, dated July 27, 2010, including
Appendix A, dated January 29, 2010.
(6) For inboard brake, outboard brake accumulators: Bombardier
Service Bulletin 670BA-32-026, Revision A, dated July 27, 2010,
including Appendix A, dated January 29, 2010.
(j) No Cracking Found During Accomplishment of 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) Any Cracking Found During Accomplishment of 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 the replacement specified in paragraph (o) of this
AD.
(3) For any cracked inboard brake or outboard brake accumulator
replaced the cracked accumulator with a new accumulator, P/N
90006691, in accordance with the replacement specified in 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
[[Page 16196]]
with a new one 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 or 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, of the
Bombardier CL-600-2C10, CL-600-2D15, CL-600-2D24, CL-600-2E25
Maintenance Requirements Manual, CSP B-053, Revision 11, dated
October 20, 2010.
(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.
(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, dated December 22, 2010.
(q) Credit for Actions Accomplished in Accordance With Previous Service
Information
(1) Actions done 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), or (q)(1)(v) of this AD is acceptable for compliance
with the corresponding requirements of this AD.
(i) Bombardier Alert Service Bulletin A670BA-29-011, dated
October 18, 2007.
(ii) Bombardier Alert Service Bulletin A670BA-29-012, dated
March 13, 2008.
(iii) Bombardier Alert Service Bulletin A670BA-32-021, dated
November 21, 2006.
(iv) Bombardier Alert Service Bulletin A670BA-32-021, Revision
A, dated March 7, 2007.
(v) Bombardier Alert Service Bulletin A670BA-32-021, Revision B,
dated October 18, 2007.
(2) Actions done before the effective date of this AD using the
Accomplishment Instructions of Bombardier Service Bulletin 670BA-29-
013, dated January 29, 2010; or 670BA-32-026, dated January 29,
2010; are acceptable for compliance with the corresponding
requirements of this AD.
(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, 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 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 A,
dated July 27, 2010, including Appendix A, Revision A, dated July
26, 2010.
(2) Bombardier Alert Service Bulletin A670BA-29-012, including
Appendix A, Revision A, dated July 27, 2010.
(3) Bombardier Service Bulletin A670BA-32-021, Revision C, dated
July 27, 2010, including Appendix A, Revision A, dated October 18,
2007.
(4) Bombardier Service Bulletin 670BA-29-013, Revision A, dated
July 27, 2010, including Appendix A, dated January 29, 2010.
(5) Bombardier Service Bulletin 670BA-32-026, Revision A, dated
July 27, 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, dated December 22,
2010.
(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, of the
Bombardier CL-600-2C10, CL-600-2D15, CL-600-2D24, CL-600-2E25
Maintenance Requirements Manual, CSP B-053, Revision 11, dated
October 20, 2010.
Issued in Renton, Washington, on January 26, 2012.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2012-6622 Filed 3-19-12; 8:45 am]
BILLING CODE 4910-13-P