DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
14 CFR Part 39
[Docket No. FAA-2010-0223; Directorate Identifier 2009-NM-105-AD] RIN
2120-AA64
AIRWORTHINESS DIRECTIVES; Bombardier, Inc. Model CL-600-2B19 (Regional Jet
Series 100 & 440), 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).
--------------------------------------------------------------------------
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:
Several cases of corrosion in lower structural members of the passenger
door have been reported. It was subsequently determined that a drainage
ramp (constructed from resin) had deteriorated with time and was retaining
moisture. * * * Corrosion left undetected could eventually affect the
structural integrity of the door and surrounding structure.
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 April 29, 2010.
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 Cote Vertu Road West, Dorval, Quebec 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: Craig Yates, 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) 228-7355; 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 ADD-
RESSES section. Include "Docket No. FAA-2010-0223; Directorate Identifier
2009-NM-105-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
Transport Canada Civil Aviation, which is the aviation authority for
Canada, has issued Canadian Airworthiness Directive CF-2009-23, dated May
19, 2009 (referred to after this as "the MCAI"), to correct an unsafe
condition for the specified products. The MCAI states:
Several cases of corrosion in lower structural members of the passenger
door have been reported. It was subsequently determined that a drainage
ramp (constructed from resin) had deteriorated with time and was retaining
moisture. The ramp, therefore, requires removal, both to prevent further
corrosion and to allow full access to the door structure during future
scheduled inspections. Corrosion left undetected could eventually affect
the structural integrity of the door and surrounding structure.
The required actions include a general visual inspection for corrosion and
damage of the lower inner section of the door, repair if necessary, and
application of corrosion inhibitor compound. You may obtain further
information by examining the MCAI in the AD docket.
RELEVANT SERVICE INFORMATION
Bombardier has issued the modification summary packages listed in the
following table. The actions described in this service information are
intended to correct the unsafe condition identified in the MCAI.
SERVICE INFORMATION
--------------------------------------------------------------------------
BOMBARDIER SERVICE
MODEL INFORMATION REVISION DATE
--------------------------------------------------------------------------
CL-600-2B19. Bombardier Modification A1...... April 24, 2009.
Summary IS601R52110030.
CL-600-2C10,
CL-600-2D15 and
CL-600-2D24. Bombardier Modification A1...... April 24, 2009.
Summary IS67052110074.
--------------------------------------------------------------------------
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 1,072 products of U.S. registry. We also estimate that it
would take about 28 work-hours per product to comply with the basic
requirements of this proposed AD. Required parts would 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. The average labor
rate is $85 per work-hour. Based on these figures, we estimate the cost of
the proposed AD on U.S. operators to be $2,551,360, or $2,380 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 Pro-
cedures (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 adding the following new AD: