[Federal Register Volume 70, Number 161 (Monday, August 22, 2005)]
[Rules and Regulations]
[Pages 48852-48854]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 05-16264]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2005-20353; Directorate Identifier 2004-NM-255-AD; 
Amendment 39-14224; AD 2005-17-03]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional 
Jet Series 100 & 440) Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) 
airplanes. This AD requires installing additional shielding of the 
hydraulic lines in the wing box area. This AD results from the 
determination that the additional hydraulic line shields will protect 
the lines from possible impact by tire debris if the tire tread fails. 
We are issuing this AD to prevent damage to the hydraulic lines and 
subsequent leakage from the two hydraulic systems, which could result 
in loss of braking capability on the affected side of the airplane, 
asymmetrical braking, and reduced directional control--particularly 
during a rejected takeoff.

DATES: Effective September 26, 2005.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in the AD as of September 26, 
2005.

ADDRESSES: You may examine the AD docket on the Internet at http://dms.dot.gov or in person at the Docket Management Facility, U.S. 
Department of Transportation, 400 Seventh Street, SW., Nassif Building, 
Room PL-401, Washington, DC.
    For the service information identified in this AD, contact 
Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station 
Centre-ville, Montreal, Quebec H3C 3G9, Canada.

FOR FURTHER INFORMATION CONTACT: Daniel Parillo, Aerospace Engineer, 
Systems and Flight Test Branch, ANE-172, FAA, New York Aircraft

[[Page 48853]]

Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New 
York 11590; telephone (516) 228-7305; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Examining the Docket

    You may examine the AD docket on the Internet at http://dms.dot.gov 
or in person at the Docket Management Facility office between 9 a.m. 
and 5 p.m., Monday through Friday, except Federal holidays. The Docket 
Management Facility office (telephone (800) 647-5227) is located on the 
plaza level of the Nassif Building at the street address stated in the 
ADDRESSES section.

Discussion

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 to include an AD that would apply to certain Bombardier 
Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. That NPRM 
was published in the Federal Register on February 15, 2005 (70 FR 
7674). That NPRM proposed to require installing additional shielding of 
the hydraulic lines in the wing box area.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. We received no comments on the NPRM or on the 
determination of the cost to the public.

Change to the NPRM

    Since the NPRM was issued, Bombardier has revised Service Bulletin 
601R-57-021. Revision `D,' dated July 11, 2005, adds a procedure to cut 
the shield, changes the illustration, and incorporates minor editorial 
changes. The technical content remains otherwise unchanged from that in 
Revision `C.' We have revised paragraphs (f) and (g) in this final rule 
to indicate that accomplishment of the actions specified in revision 
`B,' `C,' or `D' of the service bulletin is acceptable for compliance 
with the requirements of this AD.

Conclusion

    We have carefully reviewed the available data and determined that 
air safety and the public interest require adopting the AD, with the 
change described previously. We have determined that this change will 
neither increase the economic burden on any operator nor increase the 
scope of the AD.

Costs of Compliance

    The following table provides the estimated costs for U.S. operators 
to comply with this AD.

                                                 Estimated Costs
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                                                  Average                          Number of
                                         Work      labor                Cost per     U.S.-      Fleet
               Action                   hours     rate per    Parts     airplane  registered     cost
                                                    hour                           airplanes
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Shield installation.................         16        $65         $0     $1,040          91    $94,640
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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 have 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 that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866;
    (2) Is not a ``significant rule'' under 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. See the ADDRESSES 
section for a location to examine the regulatory evaluation.

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

    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 Federal Aviation Administration (FAA) amends Sec.  39.13 by 
adding the following new airworthiness directive (AD):

2005-17-03 Bombardier, Inc. (Formerly Canadair): Amendment 39-14224. 
Docket No. FAA-2005-20353; Directorate Identifier 2004-NM-255-AD.

Effective Date

    (a) This AD becomes effective September 26, 2005.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Bombardier Model CL-600-2B19 (Regional 
Jet series 100 & 440) airplanes, certificated in any category, 
serial numbers 7003 through 7067 inclusive, 7069 through 7165 
inclusive, 7167 through 7169 inclusive, and 7171 through 7188 
inclusive.

Unsafe Condition

    (d) This AD was prompted by the determination that additional 
shielding of the hydraulic lines in the wing box area will protect 
the lines from possible impact by tire debris if the tire tread 
fails. We are issuing this AD to prevent damage to the hydraulic 
lines and subsequent leakage from the two hydraulic systems, which 
could result in loss of braking capability on the affected side of 
the airplane, asymmetrical braking, and

[[Page 48854]]

reduced directional control--particularly during a rejected takeoff.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Installation of Hydraulic Line Shields

    (f) Within 24 months after the effective date of this AD, 
install additional shielding of the hydraulic lines in the wing box 
area, by doing all the actions specified in the Accomplishment 
Instructions of Bombardier Service Bulletin 601R-57-021, Revision D, 
dated July 11, 2005.
    (g) Installations accomplished before the effective date of this 
AD according to Bombardier Service Bulletin 601R-57-021, Revision 
``B,'' dated July 18, 2001; or Revision ``C,'' dated February 23, 
2004; are considered acceptable for compliance with the 
corresponding action specified in this AD.

Alternative Methods of Compliance (AMOCs)

    (h) The Manager, New York Aircraft Certification Office, FAA, 
has the authority to approve AMOCs for this AD, if requested in 
accordance with the procedures found in 14 CFR 39.19.

Related Information

    (i) Canadian airworthiness directive CF-2004-20, dated October 
5, 2004, also addresses the subject of this AD.

Material Incorporated by Reference

    (j) You must use Bombardier Service Bulletin 601R-57-021, 
Revision D, dated July 11, 2005, to perform the actions that are 
required by this AD, unless the AD specifies otherwise. The Director 
of the Federal Register approved the incorporation by reference of 
this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. 
Contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, 
Station Centreville, Montreal, Quebec H3C 3G9, Canada, for a copy of 
this service information. You may review copies at the Docket 
Management Facility, U.S. Department of Transportation, 400 Seventh 
Street SW., Room PL-401, Nassif Building, Washington, DC; on the 
internet at http://dms.dot.gov; or at the National Archives and 
Records Administration (NARA). For information on the availability 
of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on August 10, 2005.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-16264 Filed 8-19-05; 8:45 am]
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