[Federal Register Volume 68, Number 42 (Tuesday, March 4, 2003)]
[Rules and Regulations]
[Pages 10156-10157]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 03-4852]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2002-NM-93-AD; Amendment 39-13076; AD 2003-04-27]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model CL-600-2C10 Series 
Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD), 
applicable to all Bombardier CL-600-2C10 series airplanes, that 
requires revising the Airworthiness Limitations Section of the 
Instructions for Continued Airworthiness to incorporate functional and 
operational checks of the active and standby actuators of the rudder 
travel limiter (RTL) system. The actions specified by this AD are 
intended to prevent a significant latent failure in the RTL, which 
could lead to a critical loss of RTL function under certain conditions, 
and consequent loss of controllability of the airplane or structural 
damage. This action is intended to address the identified unsafe 
condition.

DATES: Effective April 8, 2003.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of April 8, 2003.

ADDRESSES: The service information referenced in this AD may be 
obtained from Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 
6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada. This 
information may be examined at the Federal Aviation Administration 
(FAA), Transport Airplane Directorate, Rules Docket, 1601 Lind Avenue, 
SW., Renton, Washington; or at the FAA, New York Aircraft Certification 
Office, 10 Fifth Street, Third Floor, Valley Stream, New York; or at 
the Office of the Federal Register, 800 North Capitol Street, NW., 
suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Dan Parrillo, Aerospace Engineer, 
Systems and Flight Test Branch, ANE-172, FAA, New York Aircraft 
Certification Office, 10 Fifth Street, Third Floor, Valley Stream, New 
York 11581; telephone (516) 256-7505; fax (516) 568-2716.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) to include an airworthiness 
directive (AD) that is applicable to all Bombardier CL-600-2C10 series 
airplanes was published in the Federal Register on September 25, 2002 
(67 FR 60187). That action proposed to require revising the 
Airworthiness Limitations Section of the Instructions for Continued 
Airworthiness to incorporate functional and operational checks of the 
active and standby actuators of the rudder travel limiter (RTL) system.

Comments

    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were submitted in response 
to the proposal or the FAA's determination of the cost to the public.

Explanation of Change to Final Rule

    We have revised this final rule to specify that the accountable 
Aircraft Certification Office (ACO) is the New York ACO, 10 Fifth 
Street, Third Floor, Valley Stream, New York, not the Atlanta ACO.

Conclusion

    The FAA has determined that air safety and the public interest 
require the adoption of the rule with the change described previously. 
The FAA has determined that this change will neither increase the 
economic burden on any operator nor increase the scope of the AD.

Cost Impact

    The FAA estimates that 15 Model CL-600-2C10 series airplanes of 
U.S. registry will be affected by this AD, that it will take 
approximately 1 work hour per airplane to accomplish the required 
actions, and that the average labor rate is $60 per work hour. Based on 
these figures, the cost impact of the AD on U.S. operators is estimated 
to be $900, or $60 per airplane.
    The cost impact figure discussed above is based on assumptions that 
no operator has yet accomplished any of the requirements of this AD 
action, and that no operator would accomplish those actions in the 
future if this AD were not adopted. The cost impact figures discussed 
in AD rulemaking actions represent only the time necessary to perform 
the specific actions actually required by the AD. These figures 
typically do not include incidental costs, such as the time required to 
gain access and close up, planning time, or time necessitated by other 
administrative actions.

Regulatory Impact

    The regulations adopted herein 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. Therefore, it 
is determined that this final rule does not have federalism 
implications under Executive Order 13132.
    For the reasons discussed above, I certify that this action (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. A final evaluation has been prepared for this action 
and it is contained in the Rules Docket. A copy of it may be obtained 
from the Rules Docket at the location provided under the caption 
ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation

[[Page 10157]]

Administration amends part 39 of the Federal Aviation Regulations (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. Section 39.13 is amended by adding the following new 
airworthiness directive:

2003-04-27 Bombardier, Inc. (Formerly Canadair): Amendment 39-13076. 
Docket 2002-NM-93-AD.

    Applicability: All Model CL-600-2C10 series airplanes, 
certificated in any category.

    Note 1: This AD requires revisions to certain operator 
maintenance documents to include new inspections. Compliance with 
these inspections is required by 14 CFR part 91.403(c). For 
airplanes that have been previously modified, altered, or repaired 
in the areas addressed by these inspections, the operator may not be 
able to accomplish the inspections described in the revisions. In 
this situation, to comply with 14 CFR part 91.403(c), the operator 
must request approval for an alternative method of compliance in 
accordance with paragraph (c) of this AD. The request should include 
a description of changes to the required inspections that will 
ensure the continued damage tolerance of the affected structure. The 
FAA has provided guidance for this determination in Advisory 
Circular (AC) 25-1529.


    Compliance: Required as indicated, unless accomplished 
previously.

    To prevent a significant latent failure in the rudder travel 
limiter (RTL), which could lead to a critical loss of RTL function 
under certain conditions, and consequent loss of controllability of the 
airplane or structural damage, accomplish the following:

Revise Airworthiness Limitations Section

    (a) Within 30 days of the effective date of this AD, revise the 
Airworthiness Limitations Section of the Instructions for Continued 
Airworthiness by incorporating the tasks of the Temporary Revisions of 
Part 2 of the Maintenance Requirements Manual (MRM), Section 1, 
Appendix A, Certification Maintenance Requirements; as listed in the 
following table; into the Airworthiness Limitations Section:

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           CRJ 700 regional jet temporary revision                   Task number            Task description
----------------------------------------------------------------------------------------------------------------
MRM2-41, dated September 28, 2001...........................  27-20-00-108              RTL standby actuator
                                                                                         (with SSCU part number
                                                                                         (P/N) C13045BA01):
                                                                                         Operational check of
                                                                                         the RTL standby
                                                                                         actuator.
MRM2-42, dated September 28, 2001...........................  27-20-00-107              RTL active and standby
                                                                                         actuators (with SSCU P/
                                                                                         N C13045BA02):
                                                                                         Functional check of the
                                                                                         RTL active and standby
                                                                                         actuators.
MRM2-43, dated September 28, 2001...........................  27-20-00-102              RTL active and standby
                                                                                         actuators (with SSCU P/
                                                                                         N C13045BA02):
                                                                                         Operational check of
                                                                                         the RTL active and
                                                                                         standby actuators.
----------------------------------------------------------------------------------------------------------------

    (b) Thereafter, except as provided by paragraph (c) of this AD, no 
alternative operational and functional checks or check intervals may be 
approved for the task numbers specified in the temporary revisions 
listed in paragraph (a) of this AD.

Alternative Methods of Compliance

    (c) An alternative method of compliance or adjustment of the 
compliance time that provides an acceptable level of safety may be used 
if approved by the Manager, New York Aircraft Certification Office 
(ACO), FAA. Operators shall submit their requests through an 
appropriate FAA Principal Maintenance Inspector, who may add comments 
and then send it to the Manager, New York ACO.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the New York ACO.

Special Flight Permits

    (d) Special flight permits may be issued in accordance with 
Sec. Sec.  21.197 and 21.199 of the Federal Aviation Regulations (14 
CFR 21.197 and 21.199) to operate the airplane to a location where the 
requirements of this AD can be accomplished.

Incorporation by Reference

    (e) The action shall be done in accordance with CRJ 700 Regional 
Jet, Temporary Revision MRM2-41, dated September 28, 2001; CRJ 700 
Regional Jet, Temporary Revision MRM2-42, dated September 28, 2001; and 
CRJ 700 Regional Jet, Temporary Revision MRM2-43, dated September 28, 
2001. This incorporation by reference was approved by the Director of 
the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 
51. Copies may be obtained from Bombardier, Inc., Canadair, Aerospace 
Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, 
Canada. Copies may be inspected at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, 
New York Aircraft Certification Office, 10 Fifth Street, Third Floor, 
Valley Stream, New York; or at the Office of the Federal Register, 800 
North Capitol Street, NW., suite 700, Washington, DC.

    Note 3: The subject of this AD is addressed in Canadian 
airworthiness directive CF-2002-06, dated January 21, 2002.

Effective Date

    (f) This amendment becomes effective on April 8, 2003.

    Issued in Renton, Washington, on February 24, 2003.
Ali Bahrami,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 03-4852 Filed 3-3-03; 8:45 am]
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