
[Federal Register: May 2, 2008 (Volume 73, Number 86)]
[Rules and Regulations]               
[Page 24145-24147]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr02my08-4]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0268; Directorate Identifier 2008-NM-050-AD; 
Amendment 39-15504; AD 2008-09-23]
RIN 2120-AA64

 
Airworthiness Directives; Bombardier 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

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 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:

    Bombardier Aerospace has completed a system safety review of the 
aircraft fuel system against fuel tank safety standards introduced 
in Chapter 525 of the Airworthiness Manual through Notice of 
Proposed Amendment (NPA) 2002-043. The identified non-compliances 
were then assessed using Transport Canada Policy Letter No. 525-001, 
to determine if mandatory corrective action is required.
    The assessment showed that it is necessary to introduce Critical 
Design Configuration Control Limitations (CDCCL), in order to 
preserve critical fuel tank system ignition source prevention 
features during configuration changes such as modifications and 
repairs, or during maintenance actions. Failure to preserve critical 
fuel tank system ignition source prevention features could result in 
a fuel tank explosion. * * *

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

DATES: This AD becomes effective June 6, 2008.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of June 6, 
2008.

ADDRESSES: You may examine the AD docket on the Internet at http://
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: Mazdak Hobbi, Aerospace Engineer, 
Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7330; 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 11, 2008 (73 
FR 12905). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:

    Bombardier Aerospace has completed a system safety review of the 
aircraft fuel system against fuel tank safety standards introduced 
in Chapter 525 of the Airworthiness Manual through Notice of 
Proposed Amendment (NPA) 2002-043. The identified non-compliances 
were then assessed using Transport Canada Policy Letter No. 525-001, 
to determine if mandatory corrective action is required.
    The assessment showed that it is necessary to introduce Critical 
Design Configuration Control Limitations (CDCCL), in order to 
preserve critical fuel tank system ignition source prevention 
features during configuration changes such as modifications and 
repairs, or during maintenance actions. Failure to preserve critical 
fuel tank system ignition source prevention features could result in 
a fuel tank explosion. Revision has been made to Bombardier CL-600-
2C10, CL-600-2D15, CL-600-2D24 Maintenance Requirements Manual, CSP 
B-053, Part 2, Section 3, ``Fuel System Limitations'' to introduce 
the required CDCCL.

    The corrective action is revising the Airworthiness Limitations 
Section of the Instructions for Continued Airworthiness to include the 
CDCCL data. 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 received no comments on the NPRM or on the determination of 
the cost to the public.

Revision of MCAI Reference

    We have revised paragraph (h) of this AD to refer to MCAI Canadian 
Airworthiness Directive CF-2008-07, dated January 25, 2008.

Conclusion

    We reviewed the available data and determined that air safety and 
the public interest require adopting the AD with the change described 
previously. We determined that this change will not increase the 
economic burden on any operator or increase the scope of the AD.

Differences Between This AD and the MCAI or Service Information

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

Costs of Compliance

    We estimate that this AD will affect about 297 products of U.S. 
registry. We also estimate that it will take about 1

[[Page 24146]]

work-hour per product to comply with the basic requirements of this AD. 
The average labor rate is $80 per work-hour. Based on these figures, we 
estimate the cost of this AD to the U.S. operators to be $23,760, or 
$80 per product.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We determined that this AD will not have federalism implications 
under Executive Order 13132. This AD will not have a substantial direct 
effect on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government.
    For the reasons discussed above, I certify this AD:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket.

Examining the AD Docket

    You may examine the AD docket on the Internet at 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 the NPRM, 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

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:

2008-09-23 Bombardier, Inc. (Formerly Canadair): Amendment 39-15504. 
Docket No. FAA-2008-0268; Directorate Identifier 2008-NM-050-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective June 6, 
2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to all Bombardier 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, 
certificated in any category, all serial numbers.

Subject

    (d) Air Transport Association (ATA) of America Code 28: Fuel.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:
    Bombardier Aerospace has completed a system safety review of the 
aircraft fuel system against fuel tank safety standards introduced 
in Chapter 525 of the Airworthiness Manual through Notice of 
Proposed Amendment (NPA) 2002-043. The identified non-compliances 
were then assessed using Transport Canada Policy Letter No. 525-001, 
to determine if mandatory corrective action is required.
    The assessment showed that it is necessary to introduce Critical 
Design Configuration Control Limitations (CDCCL), in order to 
preserve critical fuel tank system ignition source prevention 
features during configuration changes such as modifications and 
repairs, or during maintenance actions. Failure to preserve critical 
fuel tank system ignition source prevention features could result in 
a fuel tank explosion. Revision has been made to Bombardier CL-600-
2C10, CL-600-2D15, CL-600-2D24 Maintenance Requirements Manual, CSP 
B-053, Part 2, Section 3, ``Fuel System Limitations'' to introduce 
the required CDCCL.
    The corrective action is revising the Airworthiness Limitations 
Section (ALS) of the Instructions for Continued Airworthiness to 
include the CDCCL data.

Actions and Compliance

    (f) Unless already done, do the following actions.
    (1) Within 60 days after the effective date of this AD, or 
before December 16, 2008, whichever occurs first, revise the ALS of 
the Instructions for Continued Airworthiness to incorporate the 
CDCCL data specified in CRJ 700/900 Series Regional Jet (Bombardier) 
Temporary Revision 2-222, dated March 30, 2006, to Section 3, ``Fuel 
System Limitations,'' of Part 2 of Bombardier CL-600-2C10, CL-600-
2D15 and CL-600-2D24 Maintenance Requirements Manual CSP B-053.

    Note 1: The actions required by paragraph (f)(1) of this AD may 
be done by inserting a copy of the TR into the maintenance 
requirements manual. When the TR has been included in the general 
revision of the maintenance program, the general revision may be 
inserted into the maintenance requirements manual, provided the 
relevant information in the general revision is identical to that in 
the TR, and the temporary revision may be removed.

    (2) After accomplishing the actions specified in paragraph 
(f)(1) of this AD, no alternative CDCCLs may be used unless the 
CDCCLs are part of a later revision of Section 3, ``Fuel System 
Limitations,'' of Part 2, Revision 9, dated July 20, 2007, of 
Bombardier CL-600-2C10, CL-600-2D15 and CL-600-2D24 Maintenance 
Requirements Manual CSP B-053, that is approved by the Manager, New 
York Aircraft Certification Office (ACO), FAA, or Transport Canada 
Civil Aviation (or its delegated agent); or unless the CDCCLs are 
approved as an alternative method of compliance (AMOC) in accordance 
with the procedures specified in paragraph (g)(1) of this AD.

FAA AD Differences

    Note 2: This AD differs from the MCAI and/or service information 
as follows: No differences.

Other FAA AD Provisions

    (g) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York ACO, 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: Mazdak Hobbi, Aerospace Engineer, Airframe and 
Propulsion Branch, ANE-171, FAA, New York Aircraft Certification 
Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; 
telephone (516) 228-7330; fax (516) 794-5531. Before using any 
approved AMOC on any airplane to which the AMOC applies, notify your 
appropriate principal inspector (PI) in the FAA Flight Standards 
District Office (FSDO), or lacking a PI, your local FSDO.

[[Page 24147]]

    (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, the 
Office of Management and Budget (OMB) has approved the information 
collection requirements and has assigned OMB Control Number 2120-
0056.

Related Information

    (h) Refer to MCAI Canadian Airworthiness Directive CF-2008-07, 
dated January 25, 2008, and CRJ 700/900 Series Regional Jet 
(Bombardier) Temporary Revision 2-222, dated March 30, 2006, for 
related information.

Material Incorporated by Reference

    (i) You must use CRJ 700/900 Series Regional Jet (Bombardier) 
Temporary Revision 2-222, dated March 30, 2006, to Section 3, ``Fuel 
System Limitations,'' of Part 2 of Bombardier CL-600-2C10, CL-600-
2D15 and CL-600-2D24 Maintenance Requirements Manual CSP B-053, to 
do the actions required by this AD, unless the AD specifies 
otherwise.
    (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., Canadair, Aerospace Group, P.O. Box 6087, Station 
Centre-ville, Montreal, Quebec H3C 3G9, Canada.
    (3) You may review copies at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or 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/cfr/ibr-
locations.html.

    Issued in Renton, Washington, on April 24, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E8-9570 Filed 5-1-08; 8:45 am]

BILLING CODE 4910-13-P
