[Federal Register: May 17, 2005 (Volume 70, Number 94)]
[Rules and Regulations]
[Page 28181-28184]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr17my05-2]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2005-21204; Directorate Identifier 2005-NM-078-AD;
Amendment 39-14087; AD 2005-10-10]
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; request for comments.
-----------------------------------------------------------------------
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 revising the Airworthiness Limitations
section of the Instructions for Continued Airworthiness of the Canadair
Regional Jet Maintenance Requirements Manual by incorporating new
repetitive detailed inspections of the secondary load path indicator
for the horizontal stabilizer
[[Page 28182]]
trim actuator (HSTA). This AD is prompted by a report of a potential
failure of the horizontal stabilizer trim actuator (HSTA) secondary nut
in conjunction with a latent failure of the HSTA primary load path
discovered during sampling program activities. We are issuing this AD
to detect and correct latent failure of the primary load path of the
HSTA, which, in conjunction with a failure of the HSTA secondary nut,
could result in loss of horizontal trim control and consequent reduced
controllability of the airplane.
DATES: Effective June 1, 2005.
The incorporation by reference of a certain publication listed in
the AD is approved by the Director of the Federal Register as of June
1, 2005.
We must receive comments on this AD by July 18, 2005.
ADDRESSES: Use one of the following addresses to submit comments on
this AD.
DOT Docket web site: Go to http://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking web site: Go to http://www.regulations.gov
and follow the instructions for sending your
comments electronically.
Mail: Docket Management Facility; U.S. Department of
Transportation, 400 Seventh Street SW., Nassif Building, room PL-401,
Washington, DC 20590.
Fax: (202) 493-2251.
Hand Delivery: Room PL-401 on the plaza level of the
Nassif Building, 400 Seventh Street SW., Washington, DC, between 9 a.m.
and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this AD, contact Bombardier,
Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centreville,
Montreal, Quebec H3C 3G9, Canada.
You can examine the contents of this 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., room PL-401,
on the plaza level of the Nassif Building, Washington, DC. This docket
number is FAA-2005-21204; the directorate identifier for this docket is
2005-NM-078-AD.
Examining the Docket
You can examine the AD docket on the Internet at http://www.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 DOT
street address stated in the ADDRESSES section. Comments will be
available in the AD docket shortly after the Docket Management System
(DMS) receives them.
FOR FURTHER INFORMATION CONTACT: Daniel Parrillo, Aerospace Engineer,
Systems and Flight Test Branch, ANE-172, FAA, New York Aircraft
Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New
York 11590; telephone (516) 228-7305; fax (516) 794-5531.
SUPPLEMENTARY INFORMATION: Transport Canada Civil Aviation, which is
the airworthiness authority for Canada, notified the FAA that an unsafe
condition may exist on certain Bombardier Model CL-600-2B19 (Regional
Jet Series 100 & 440) airplanes. TCCA advises that a potential for
failure of the secondary nut of the horizontal stabilizer trim actuator
(HSTA), in conjunction with a latent failure of the HSTA primary load
path, was discovered during HSTA sampling program activities. Failure
of the HSTA secondary nut, in conjunction with a latent failure of the
HSTA primary load path, if not corrected, could result in loss of
horizontal trim control and consequent reduced controllability of the
airplane.
Relevant Service Information
Bombardier has issued Canadair Regional Jet Temporary Revision 2A-
8, dated December 10, 2003, to the Canadair Regional Jet Maintenance
Requirements Manual (MRM), CSP A-053, Appendix A, ``Certification
Maintenance Requirements.'' This temporary revision incorporates Task
C27-42-103-01, ``Detailed Inspection of the HSTA Secondary Load Path
Indicator,'' into the MRM. TCCA mandated the temporary revision and
issued Canadian airworthiness directive CF-2005-04, dated February 14,
2005, to ensure the continued airworthiness of these airplanes in
Canada.
FAA's Determination and Requirements of This AD
This airplane model is manufactured in Canada and is type
certificated for operation in the United States under the provisions of
Sec. 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the
applicable bilateral airworthiness agreement. Pursuant to this
bilateral airworthiness agreement, the TCCA has kept the FAA informed
of the situation described above. We have examined the TCCA's findings,
evaluated all pertinent information, and determined that we need to
issue an AD for products of this type design that are certificated for
operation in the United States.
Therefore, we are issuing this AD to require revising the
Airworthiness Limitations section of the Instructions for Continued
Airworthiness of the Canadair Regional Jet MRM by incorporating new
repetitive detailed inspections of the HSTA secondary load path
indicator. This AD requires incorporating the actions specified in the
temporary revision described previously into the Canadair Regional Jet
MRM, except as discussed under ``Difference Between the AD and Canadian
Airworthiness Directive.''
Difference Between the AD and Canadian Airworthiness Directive
The Canadian airworthiness directive gives operators credit for
previously accomplished initial inspections of the HSTA secondary load
path indicator done in accordance with Bombardier Alert Service
Bulletin A601R-27-128, dated February 17, 2003; or Revision A, dated
April 17, 2003. This AD also gives operators credit for initial
inspections done before the effective date of this AD in accordance
with Revision B of Bombardier Alert Service Bulletin A601R-27-128,
dated March 2, 2005, which was issued after the Canadian airworthiness
directive was issued. This difference has been coordinated with TCCA.
FAA's Determination of the Effective Date
An unsafe condition exists that requires the immediate adoption of
this AD; therefore, providing notice and opportunity for public comment
before the AD is issued is impracticable, and good cause exists to make
this AD effective in less than 30 days.
Comments Invited
This AD is a final rule that involves requirements that affect
flight safety and was not preceded by notice and an opportunity for
public comment; however, we invite you to submit any relevant written
data, views, or arguments regarding this AD. Send your comments to an
address listed under ADDRESSES. Include ``Docket No. FAA-2005-21204;
Directorate Identifier 2005-NM-078-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of the AD. We will consider
all comments received by the closing date and may amend the AD in light
of those comments.
We will post all comments we receive, without change, to http://dms.dot.gov
, including any personal
[[Page 28183]]
information you provide. We will also post a report summarizing each
substantive verbal contact with FAA personnel concerning this AD. Using
the search function of our docket web site, anyone can find and read
the comments in any of our dockets, including the name of the
individual who sent the comment (or signed the comment on behalf of an
association, business, labor union, etc.). You can review the DOT's
complete Privacy Act Statement in the Federal Register published on
April 11, 2000 (65 FR 19477-78), or you can visit http://dms.dot.gov.
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 the 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 AD. 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 FAA amends Sec. 39.13 by adding the following new airworthiness
directive (AD):
2005-10-10 Bombardier, Inc. (Formerly Canadair): Amendment 39-14087.
Docket No. FAA-2005-21204; Directorate Identifier 2005-NM-078-AD.
Effective Date
(a) This AD becomes effective June 1, 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,
having serial numbers 7003 and subsequent.
Note 1:
This AD requires revisions to certain operator maintenance
documents to include new inspections. Compliance with these
inspections is required by 14 CFR 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 91.403(c), the operator must
request approval for an alternative method of compliance according
to paragraph (j) 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.
Unsafe Condition
(d) This AD is prompted by a report of a potential failure of
the horizontal stabilizer trim actuator (HSTA) secondary nut in
conjunction with a latent failure of the HSTA primary load path
discovered during sampling program activities. We are issuing this
AD to detect and correct latent failure of the primary load path of
the HSTA, which, in conjunction with a failure of the HSTA secondary
nut, could result in loss of horizontal trim control and consequent
reduced controllability of the airplane.
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.
Revision to the Airworthiness Limitations (AWL) Section
(f) Within 30 days after the effective date of this AD: Revise
the AWL section of the Instructions for Continued Airworthiness of
the Canadair Regional Jet Maintenance Requirements Manual (MRM), CSP
A-053, Appendix A, ``Certification Maintenance Requirements,'' by
incorporating Task C27-42-103-01, ``Detailed Inspection of the HSTA
Secondary Load Path Indicator'' of Canadair Regional Jet Temporary
Revision 2A-8, dated December 10, 2003, into the AWL section.
Thereafter, except as provided by paragraph (j) of this AD, no
alternative structural inspection intervals may be approved for this
HSTA secondary load path indicator.
(g) When the information in Canadair Regional Jet Temporary
Revision 2A-8, dated December 10, 2003, is included in the general
revisions of the MRM, the general revisions may be inserted into the
AWL section of the Instructions for Continued Airworthiness and this
temporary revision may be removed from the MRM.
Initial Inspection Phase-In Schedule
(h) Prior to accumulating 5,000 total flight hours on the HSTA
or within 500 flight hours after the effective date of this AD,
whichever occurs later: Do the initial inspection of the HSTA
secondary load path indicator according to the task specified in
paragraph (f) of this AD.
Initial Inspections According to Bombardier Service Bulletin A601R-27-
128
(i) Inspections of the HSTA secondary load path indicator
accomplished before the effective date of this AD in accordance with
Bombardier Alert Service Bulletin A601R-27-128, dated February 17,
2003; Revision A, dated April 17, 2003; or Revision B, dated March
2, 2005; are acceptable for compliance with the initial inspection
requirement of paragraph (h) of this AD.
Alternative Methods of Compliance (AMOCs)
(j) 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
(k) Canadian airworthiness directive CF-2005-04, dated February
14, 2005, also addresses the subject of this AD.
Material Incorporated by Reference
(l) You must use Canadair Regional Jet Temporary Revision 2A-8,
dated December 10, 2003, to the Canadair Regional Jet Maintenance
Requirements Manual, CSP A-053, Appendix A, ``Certification
Maintenance Requirements,'' to perform the actions that are required
by this AD, unless the AD specifies otherwise. The Director of the
Federal Register approves the incorporation
[[Page 28184]]
by reference of this document in accordance with 5 U.S.C. 552(a) and
1 CFR part 51. To get copies of the service information, contact
Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station
Centreville, Montreal, Quebec H3C 3G9, Canada. To view the AD
docket, go to the Docket Management Facility, U.S. Department of
Transportation, 400 Seventh Street SW., room PL-401, Nassif
Building, Washington, DC. To review copies of the service
information, go to 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 May 5, 2005.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-9553 Filed 5-16-05; 8:45 am]
BILLING CODE 4910-13-P