
[Federal Register: November 5, 2009 (Volume 74, Number 213)]
[Proposed Rules]               
[Page 57268-57270]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr05no09-15]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-1033; Directorate Identifier 2009-NM-104-AD]
RIN 2120-AA64

 
Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional 
Jet Series 700, 701, & 702) Airplanes, Model CL-600-2D15 (Regional Jet 
Series 705) Airplanes, and Model 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 that would supersede an existing AD. 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: Following in-flight test 
deployments on CL-600-2B19 aircraft, several Air-Driven generators 
(ADGs) failed to come on-line. Investigation revealed that, as a result 
of a wiring anomaly that had not been detected during ADG manufacture, 
a short circuit was possible between certain internal wires and their 
metallic over-braided shields, which could result in the ADG not 
providing power when deployed.
    The unsafe condition is that failure of the ADG could lead to loss 
of several functions essential for safe flight. 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 December 21, 
2009.

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.
    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; e-mail 
thd.crj@aero.bombardier.com; 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 or 425-227-1152.

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: Fabio Buttitta, 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) 228-7303; 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-2009-1033; 
Directorate Identifier 2009-NM-104-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 have lengthened the 30-day comment period for proposed ADs that 
address MCAI originated by aviation authorities of other countries to 
provide adequate time for interested parties to submit comments. The 
comment period for these proposed ADs is now typically 45 days, which 
is consistent with the comment period for domestic transport ADs.
    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

    On March 6, 2009, we issued AD 2009-06-18, Amendment 39-15855 (74 
FR 13094, March 26, 2009). That AD required actions intended to address 
an unsafe condition on the products listed above.
    Since we issued AD 2009-06-18, we have received notice that 
additional suspect air-driven generators may have been installed 
between the effective date of Canadian Airworthiness Directive CF-2008-
10, and the effective date of the equivalent FAA AD, AD 2009-06-18. 
Therefore, we have determined that the actions required by paragraph 
(f)(1) of AD 2009-06-18 are also required for Model CL-600-2C10 
airplanes having serial numbers 10266 through 10273, and Model CL-600-
2D15 and CL-600-2D24 airplanes having serial numbers 15163 through 
15223.

[[Page 57269]]

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 304 products of U.S. registry.
    The actions that are required by AD 2009-06-18 and retained in this 
proposed AD take about 5 work-hours per product, at an average labor 
rate of $80 per work hour. Required parts cost about $0 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 costs. 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 $121,600, or $400 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, 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 removing Amendment 39-15855 (74 FR 
13094, March 26, 2009) and adding the following new AD:

Bombardier, Inc. (Formerly Canadair): Docket No. FAA-2009-1033; 
Directorate Identifier 2009-NM-104-AD.

Comments Due Date

    (a) We must receive comments by December 21, 2009.

Affected ADs

    (b) The proposed AD supersedes AD 2009-06-18, Amendment 39-
15855.

Applicability

    (c) This AD applies to Bombardier Model CL-600-2C10 (Regional 
Jet Series 700, 701, & 702) airplanes, having serial numbers (SNs) 
10004 and subsequent; and Model CL-600-2D15 (Regional Jet Series 
705) airplanes and Model CL-600-2D24 (Regional Jet Series 900) 
airplanes, having SN 15002 and subsequent; certificated in any 
category.

Subject

    (d) Air Transport Association (ATA) of America Code 24: 
Electrical power.

Reason

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

    Following in-flight test deployments on CL-600-2B19 aircraft, 
several Air-Driven generators (ADGs) failed to come on-line. 
Investigation revealed that, as a result of a wiring anomaly that 
had not been detected during ADG manufacture, a short circuit was 
possible between certain internal wires and their metallic over-
braided shields, which could result in the ADG not providing power 
when deployed. This directive mandates checking of the ADG and 
modification of the ADG internal wiring, if required. It also 
prohibits future installation of unmodified ADGs.

The unsafe condition is that failure of the ADG could lead to loss 
of several functions essential for safe flight.

Restatement of Requirements of AD 2009-06-18

    (f) Unless already done, do the following actions.
    (1) For airplanes identified in Table 1 of this AD: Within 12 
months after April 30, 2009 (the effective date of AD 2009-06-18), 
inspect the serial number of the installed ADG. A review of airplane 
maintenance records is acceptable in lieu of this inspection if the 
serial number of the ADG can be conclusively determined from that 
review.

[[Page 57270]]



               Table 1--Bombardier Airplane Identification
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              Model                             Serial Nos.
------------------------------------------------------------------------
CL-600-2C10 airplanes............  10004 through 10265.
CL-600-2D15 and CL-600-2D24        15002 through 15162.
 airplanes.
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     (i) If the serial number is not listed in paragraph 1.A of 
Bombardier Service Bulletin 670BA-24-015, Revision A, dated December 
18, 2006, no further action is required by this AD.
    (ii) If the serial number is listed in paragraph 1.A of 
Bombardier Service Bulletin 670BA-24-015, Revision A, dated December 
18, 2006 (``the service bulletin''), within 12 months after April 
30, 2009, inspect the ADG identification plate and, as applicable, 
do the actions of paragraph (f)(1)(ii)(A) or (f)(1)(ii)(B) of this 
AD.
    (A) If the identification plate is marked with the symbol ``24-
2,'' no further action is required by this AD.
    (B) If the identification plate is not marked with the symbol 
``24-2,'' modify the ADG wiring in accordance with the 
Accomplishment Instructions of the service bulletin.
    (2) For all Model CL-600-2C10 airplanes having SN 10004 and 
subsequent, and Model CL-600-2D15 and CL-600-2D24 airplanes having 
SN 15002 and subsequent: As of April 30, 2009, no ADG part number 
604-90800-19 (761339E), having SN 0101 through 0132, 0134 through 
0167, 0169 through 0358, 0360 through 0438, 0440 through 0456, 0458 
through 0467, 0469, 0471 through 0590, 0592 through 0597, 0599 
through 0745, 0747 through 1005, or 1400 through 1439, may be 
installed on any airplane, unless the identification plate of the 
ADG is identified with the symbol ``24-2.''

    Note 1: Bombardier Service Bulletin 670BA-24-015, Revision A, 
dated December 18, 2006, refers to Hamilton Sundstrand Service 
Bulletin ERPS10AG-24-2, dated February 19, 2004, for further 
information on identifying the symbol ``24-2.''

    (3) Actions done before April 30, 2009, according to Bombardier 
Service Bulletin 670BA-24-015, dated May 17, 2004, are considered 
acceptable for compliance with the corresponding actions specified 
in paragraph (f)(1) of this AD, provided the ADG has not been 
replaced since those actions were done.

New Requirements of This AD: Actions and Compliance

    (g) Unless already done, do the following actions.
    (1) For airplanes identified in Table 2 of this AD: Within 12 
months after the effective date of this AD, inspect the serial 
number of the installed ADG. A review of airplane maintenance 
records is acceptable in lieu of this inspection if the serial 
number of the ADG can be conclusively determined from that review.

         Table 2--Additional Bombardier Airplane Identification
------------------------------------------------------------------------
              Model                             Serial Nos.
------------------------------------------------------------------------
CL-600-2C10 airplanes............  10266 through 10273.
CL-600-2D15 and CL-600-2D24        15163 through 15223.
 airplanes.
------------------------------------------------------------------------

     (i) If the serial number is not listed in paragraph 1.A of 
Bombardier Service Bulletin 670BA-24-015, Revision A, dated December 
18, 2006, no further action is required by this AD.
    (ii) If the serial number is listed in paragraph 1.A of 
Bombardier Service Bulletin 670BA-24-015, Revision A, dated December 
18, 2006 (``the service bulletin''), within 12 months after the 
effective date of this AD, inspect the ADG identification plate and, 
as applicable, do the actions of paragraph (g)(1)(ii)(A) or 
(g)(1)(ii)(B) of this AD.
    (A) If the identification plate is marked with the symbol ``24-
2'', no further action is required by this AD.
    (B) If the identification plate is not marked with the symbol 
``24-2'', modify the ADG wiring in accordance with the 
Accomplishment Instructions of the service bulletin.
    (2) Actions done before the effective date of this AD according 
to Bombardier Service Bulletin 670BA-24-015, dated May 17, 2004, are 
considered acceptable for compliance with the corresponding actions 
specified in paragraph (g)(1) of this AD, provided the ADG has not 
been replaced since those actions were done.

FAA AD Differences

    Note 2:  This AD differs from the MCAI and/or service 
information as follows: The MCAI specifies to inspect Model CL-600-
2C10 airplanes having SNs 10004 through 10265 and Model CL-600-2D15 
and CL-600-2D24 airplanes having SNs 15002 through 15162. This AD 
also specifies to inspect Model CL-600-2C10 airplanes having serial 
numbers 10266 through 10273, and Model CL-600-2D15 and CL-600-2D24 
airplanes having serial numbers 15163 through 15223.

Other FAA AD Provisions

    (h) 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: Fabio Buttitta, 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) 228-7303; 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, the 
Office of Management and Budget (OMB) has approved the information 
collection requirements and has assigned OMB Control Number 2120-
0056.

Related Information

    (i) Refer to MCAI Canadian Airworthiness Directive CF-2008-10, 
dated February 5, 2008; and Bombardier Service Bulletin 670BA-24-
015, Revision A, dated December 18, 2006; for related information.

    Issued in Renton, Washington, on October 29, 2009.
Stephen P. Boyd,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E9-26684 Filed 11-4-09; 8:45 am]

BILLING CODE 4910-13-P
