[Federal Register: August 2, 2005 (Volume 70, Number 147)]
[Rules and Regulations]
[Page 44274-44276]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr02au05-10]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2005-20595; Directorate Identifier 2004-NM-149-AD;
Amendment 39-14208; AD 2005-16-03]
RIN 2120-AA64
Airworthiness Directives; Bombardier Model DHC-7-100, DHC-7-101,
DHC-7-102, and DHC-7-103 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 DHC-7-100, DHC-7-101, DHC-7-102, and DHC-7-103
airplanes. This AD requires revising the Airworthiness Limitations
section of the Instructions of Continued Airworthiness to include a
new, lower life limit for lower wing skins. This AD results from the
discovery that, during the manufacture of the lower wing skins, score
marks may have been accidentally inscribed around the edge of the lower
wing skin doublers. We are issuing this AD to prevent fatigue cracks
from developing at the score marks in the lower wing skins, which could
result in the structural failure of the wing.
DATES: Effective September 6, 2005.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in the AD as of September 6,
2005.
[[Page 44275]]
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.
Contact Bombardier, Inc., Bombardier Regional Aircraft Division,
123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada, for service
information identified in this AD.
FOR FURTHER INFORMATION CONTACT: David Lawson, Aerospace Engineer,
Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft
Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New
York 11590; telephone (516) 228-7327; 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 DHC-7-100, DHC-7-101, DHC-7-102, and DHC-7-103 airplanes. That
NPRM was published in the Federal Register on March 15, 2005 (70 FR
12614). That NPRM proposed to require revising the Airworthiness
Limitations section of the Instructions of Continued Airworthiness to
include a new lower life limit for lower wing skins.
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.
Explanation of Change to Applicability
We have revised the applicability of the NPRM to identify model
designations as published in the most recent type certificate data
sheet for the affected models.
Explanation of Correction to Paragraph (h)
We have revised paragraph (h) of this AD to include reference to
paragraph (g). Reference to that paragraph was inadvertently omitted
from the NPRM.
Conclusion
We have carefully reviewed the available data, and determined that
air safety and the public interest require adopting the AD with the
changes described previously. We have determined that these changes
will neither increase the economic burden on any operator nor increase
the scope of the AD.
Costs of Compliance
This AD will affect about 3 airplanes of U.S. registry. The
revision of the Airworthiness Limitations section will take about 1
work hour per airplane, at an average labor rate of $65 per work hour.
Based on these figures, the estimated cost of the AD for U.S. operators
is $195, or $65 per airplane.
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
0
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):
2005-16-03 Bombardier, Inc. (Formerly de Havilland, Inc.): Amendment
39-14208. Docket No. FAA-2005-20595; Directorate Identifier 2004-NM-
149-AD.
Effective Date
(a) This AD becomes effective September 6, 2005.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier Model DHC-7-100, DHC-7-101,
DHC-7-102, and DHC-7-103 airplanes, serial numbers 3 through 10
inclusive, 12 through 14 inclusive, and 16 through 27 inclusive;
certificated in any category.
Note 1: This AD requires revision to a certain operator
maintenance document to include a new replacement time. Compliance
with this replacement time is required by 14 CFR 91.403(c). For
airplanes that have been previously modified, altered, or repaired
in the areas addressed by this replacement time, the operator may
not be able to accomplish the replacement described in the revision.
In this situation, to comply with 14 CFR 91.403(c), the operator
must request approval for an alternative method of compliance
according to paragraph (i) of this AD. The request should include a
description of changes to the required replacement time 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.
Unsafe Condition
(d) This AD is prompted by the discovery that, during the
manufacture of the lower wing skins, score marks may have been
accidentally inscribed around the edge of the
[[Page 44276]]
lower wing skin doublers. We are issuing this AD to prevent fatigue
cracks from developing at the score marks in the lower wing skins,
which could result in the structural failure of the wing.
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.
Revise the Airworthiness Limitations (AWL) Section--New Life Limit
(f) Within 30 days after the effective date of this AD, revise
the AWL section of the Instructions for Continued Airworthiness to
incorporate new life limits for the lower wing skins by
incorporating Bombardier Temporary Revision (TR) 5-103, dated March
26, 2004, to the Bombardier Dash 7 Series 100 Maintenance Manual,
PSM 1-7-2, into the AWL section.
(g) When the contents of Bombardier TR 5-103, dated March 26,
2004, have been included in the general revisions of the AWL
section, the general revisions may be incorporated into the AWL
section, and the TR may be removed from the AWL section.
(h) After the actions specified in paragraphs (f) and (g) of
this AD have been accomplished, no alternative life limits may be
approved for the lower wing skins, except as provided in paragraph
(i) of this AD.
Alternative Methods of Compliance (AMOCs)
(i) 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
(j) Canadian airworthiness directive CF-2004-12, dated June 28,
2004, also addresses the subject of this AD.
Material Incorporated by Reference
(k) You must use Bombardier Temporary Revision 5-103 to Chapter
5-10-11 of the Bombardier Dash 7 Series 100 Maintenance Manual, PSM
1-7-2, dated March 26, 2004, 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 Regional Aircraft Division, 123 Garratt
Boulevard, Downsview, Ontario M3K 1Y5, 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 July 21, 2005.
Kevin M. Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-15012 Filed 8-1-05; 8:45 am]
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