[Federal Register Volume 73, Number 166 (Tuesday, August 26, 2008)]
[Proposed Rules]
[Pages 50254-50256]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-19717]



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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0911; Directorate Identifier 2008-NM-115-AD]
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), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for the 
products listed above. This proposed 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:

    There have been several incidents of shorting and sparks due to 
de-icing fluid ingress into the cockpit of CL-600-2C10 and CL-600-
2D24 aircraft. De-icing fluid can enter between the windshields and 
side windows, leading to possible damage to the electrical 
components and wires as it comes into contact with cockpit 
floodlight electrical connections.

De-icing fluid in contact with cockpit floodlight electrical 
connections can result in possible arcing and fire. The proposed AD 
would require actions that are intended to address the unsafe condition 
described in the MCAI.

DATES: We must receive comments on this proposed AD by September 25, 
2008.

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 W12-40, 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 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: Wing Chan, Aerospace Engineer, Systems 
and Flight Test Branch, ANE-172, FAA, New York Aircraft Certification 
Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; 
telephone (516) 228-7311; 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-2008-0911; 
Directorate Identifier 2008-NM-115-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

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2008-19, dated May 8, 2008 (referred to after this as ``the MCAI''), to 
correct an unsafe condition for the specified products. The MCAI 
states:

    There have been several incidents of shorting and sparks due to 
de-icing fluid ingress into the cockpit of CL-600-2C10 and CL-600-
2D24 aircraft. De-icing fluid can enter between the windshields and 
side windows, leading to possible damage to the electrical 
components and wires as it comes into contact with cockpit 
floodlight electrical connections.

De-icing fluid in contact with cockpit floodlight electrical 
connections can result in possible arcing and fire. The actions to 
address the unsafe condition include performing a leak test, applying 
sealant between the windshields and side windows, and doing related 
investigative and corrective actions. The related investigative action 
is performing a leak test after applying sealant. The related 
corrective action is contacting Bombardier for repair instructions and 
doing the repair. You may obtain further information by examining the 
MCAI in the AD docket.

Relevant Service Information

    Bombardier has issued Alert Service Bulletin A670BA-56-002, 
Revision A, dated February 26, 2008. 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.

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 proposed 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 proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 254 products of U.S. registry. We also estimate that 
it would take about 4 work-hours per product to comply with the basic 
requirements of this proposed AD. The average labor rate is $80 per 
work-hour. Based on these figures, we estimate the cost of the

[[Page 50255]]

proposed AD on U.S. operators to be $81,280, or $320 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 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); 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 proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, 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. (Formerly Canadair): Docket No. FAA-2008-0911; 
Directorate Identifier 2008-NM-115-AD.

Comments Due Date

    (a) We must receive comments by September 25, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Bombardier Model CL-600-2C10 (Regional 
Jet Series 700, 701 & 702) airplanes, serial numbers 10003 through 
10216 inclusive; and Model CL-600-2D15 (Regional Jet Series 705) and 
CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers 
15001 through 15040 inclusive; certificated in any category.

Subject

    (d) Air Transport Association (ATA) of America Code 56: Windows.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:

    There have been several incidents of shorting and sparks due to 
de-icing fluid ingress into the cockpit of CL-600-2C10 and CL-600-
2D24 aircraft. De-icing fluid can enter between the windshields and 
side windows, leading to possible damage to the electrical 
components and wires as it comes into contact with cockpit 
floodlight electrical connections.

De-icing fluid in contact with cockpit floodlight electrical 
connections can result in possible arcing and fire. The actions to 
address the unsafe condition include performing a leak test, 
applying sealant between the windshields and side windows, and doing 
related investigative and corrective actions. The related 
investigative action is performing a leak test after applying 
sealant. The related corrective action is contacting Bombardier for 
repair instructions and doing the repair.

Actions and Compliance

    (f) Unless already done, do the following actions.
    (1) Within 450 flight hours after the effective date of this AD: 
Perform a leak test in accordance with Part A of the Accomplishment 
Instructions of Bombardier Alert Service Bulletin A670BA-56-002, 
Revision A, dated February 26, 2008.
    (2) If leakage is detected in the leak test performed in 
accordance with paragraph (f)(1) of this AD: Prior to further 
flight, apply sealant between the windshields and side windows and 
do all applicable related investigative and corrective actions in 
accordance with Part B of the Accomplishment Instructions of 
Bombardier Alert Service Bulletin A670BA-56-002, Revision A, dated 
February 26, 2008. Do all applicable related investigative and 
corrective actions before further flight.
    (3) If there is no leakage detected in the leak test performed 
in accordance with paragraph (f)(1) of this AD: Within 6 months or 
2,000 flight hours after the effective date of this AD, whichever 
comes first, apply sealant between the windshields and side windows 
and do all applicable related investigative and corrective actions 
before further flight in accordance with Part B of the 
Accomplishment Instructions of Bombardier Alert Service Bulletin 
A670BA-56-002, Revision A, dated February 26, 2008. Do all 
applicable related investigative and corrective actions before 
further flight.
    (4) A leak test and application of sealant are also acceptable 
for compliance with the requirements of paragraphs (f)(1), (f)(2), 
and (f)(3) of this AD if done before the effective date of this AD 
in accordance with Bombardier Alert Service Bulletin A670BA-56-002, 
dated January 7, 2008.

FAA AD Differences

    Note: 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 Aircraft Certification Office, 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: Wing Chan, Aerospace 
Engineer, Systems and Flight Test Branch, ANE-172, FAA, New York 
Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, 
Westbury, New York 11590; telephone (516) 228-7311; 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.
    (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-2008-19, 
dated May 8, 2008; and Bombardier Alert Service Bulletin A670BA-56-
002, Revision A, dated February 26, 2008; for related information.


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    Issued in Renton, Washington, on August 18, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E8-19717 Filed 8-25-08; 8:45 am]
BILLING CODE 4910-13-P