Airworthiness Directives; Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) Airplanes, Model CL-600-2D15 (Regional Jet Series 705) Airplanes, and Model CL-600-2D24 (Regional Jet Series 900) Airplanes, 69030-69032 [2010-28338]
Download as PDF
<![CDATA[
69030
Federal Register / Vol. 75, No. 217 / Wednesday, November 10, 2010 / Proposed Rules
he or she signs a form on which the TSP
requests spousal information, including
a spouse from whom the participant is
legally separated, and a person with
whom the participant is living in a
relationship that constitutes a common
law marriage in the jurisdiction in
which they live. Where a participant is
seeking to reclaim an account that has
been forfeited pursuant to 5 CFR
1650.16, spouse also means the person
to whom the participant was married on
the withdrawal deadline. For purposes
of 5 CFR 1651.5 and 5 CFR 1651.19,
spouse also means the person to whom
the participant was married on the date
of the participant’s death.
*
*
*
*
*
Uniformed services beneficiary
participant account means a beneficiary
participant account that is established
with a death benefit payment from a
TSP account to which contributions
were made by or on behalf of a member
of the uniformed services.
*
*
*
*
*
[FR Doc. 2010–28320 Filed 11–9–10; 8:45 am]
BILLING CODE 6760–01–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2010–1109; Directorate
Identifier 2010–NM–155–AD]
RIN 2120–AA64
Airworthiness Directives; Bombardier,
Inc. Model CL–600–2C10 (Regional Jet
Series 700, 701, & 702) Airplanes,
Model CL–600–2D15 (Regional Jet
Series 705) Airplanes, and Model CL–
600–2D24 (Regional Jet Series 900)
Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
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:
erowe on DSK5CLS3C1PROD with PROPOSALS-1
SUMMARY:
Rudder Travel Limiter (RTL) return spring,
part number (P/N) E0650–069–2750S, failed
prior to completion of the required
endurance test. In addition, the replacement
RTL return spring, P/N 670–93465–1 * * *
was found to be susceptible to chafing on the
VerDate Mar<15>2010
15:01 Nov 09, 2010
Jkt 223001
primary actuator, which could also result in
eventual dormant spring failure. There are
two return springs in the RTL and if both
springs failed, a subsequent mechanical
disconnect of the RTL components would
result in an unannunciated failure of the
RTL. This, in turn, would permit an increase
of rudder authority beyond normal structural
limits and, in the event of a strong rudder
input, controllability of the aeroplane could
be affected.
*
*
*
*
*
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 December 27,
2010.
You may send comments by
any of the following methods:
• Federal eRulemaking Portal: Go to
https://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,
ˆ
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 https://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.
ADDRESSES:
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
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:
Cesar Gomez, Aerospace Engineer,
PO 00000
Frm 00005
Fmt 4702
Sfmt 4702
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–
7318; 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
ADDRESSES section. Include ‘‘Docket No.
FAA–2010–1109; Directorate Identifier
2010–NM–155–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 will post all comments we
receive, without change, to https://
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
(TCCA), which is the aviation authority
for Canada, has issued Canadian
Airworthiness Directive CF–2010–18,
dated June 16, 2010 (referred to after
this as ‘‘the MCAI’’), to correct an unsafe
condition for the specified products.
The MCAI states:
Rudder Travel Limiter (RTL) return spring,
part number (P/N) E0650–069–2750S, failed
prior to completion of the required
endurance test. In addition, the replacement
RTL return spring, P/N 670–93465–1 (see
Note) was found to be susceptible to chafing
on the primary actuator, which could also
result in eventual dormant spring failure.
There are two return springs in the RTL and
if both springs failed, a subsequent
mechanical disconnect of the RTL
components would result in an
unannunciated failure of the RTL. This, in
turn, would permit an increase of rudder
authority beyond normal structural limits
and, in the event of a strong rudder input,
controllability of the aeroplane could be
affected.
Note: RTL return springs, P/N 670–93465–
1, were installed in production aeroplanes
serial number 10266 (CL–600–2C10) and
15182 (CL–600–2D24) respectively and were
introduced in-service by [Bombardier]
Service Bulletin (SB) 670BA–27–047. SB
670BA–27–047 has since been superseded by
[Bombardier] SB 670BA–27–055.
This directive mandates repetitive [detailed]
inspection of the RTL [for broken] return
springs and [damage through the casing, or
chafing of the casing of the] primary actuator,
with replacement of parts as necessary.
E:\FR\FM\10NOP1.SGM
10NOP1
Federal Register / Vol. 75, No. 217 / Wednesday, November 10, 2010 / Proposed Rules
Corrective actions include replacing
any broken return springs with new
return springs, repairing any chafing of
the primary actuator on its casing, and
replacing any primary actuator that has
damage through its casing with a new
actuator. You may obtain further
information by examining the MCAI in
the AD docket.
Relevant Service Information
Bombardier, Inc. has issued Service
Bulletin 670BA–27–055, Revision A,
dated August 6, 2010. The actions
described in this service information are
intended to correct the unsafe condition
identified in the MCAI.
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.
erowe on DSK5CLS3C1PROD with PROPOSALS-1
Costs of Compliance
Based on the service information, we
estimate that this proposed AD would
affect about 477 products of U.S.
registry. We also estimate that it would
take about 2 work-hours per product to
comply with the basic requirements of
this proposed AD. 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
$81,090, or $170 per product.
VerDate Mar<15>2010
15:01 Nov 09, 2010
Jkt 223001
Authority: 49 U.S.C. 106(g), 40113, 44701.
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 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 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:
PO 00000
Frm 00006
Fmt 4702
Sfmt 4702
69031
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new AD:
Bombardier, Inc.: Docket No. FAA–2010–
1109; Directorate Identifier 2010–NM–
155–AD.
Comments Due Date
(a) We must receive comments by
December 27, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier, Inc.
Model CL–600–2C10 (Regional Jet Series 700,
701, & 702) airplanes, serial numbers 10003
and subsequent; and Model CL–600–2D15
(Regional Jet Series 705) and Model CL–600–
2D24 (Regional Jet Series 900) airplanes,
serial numbers 15001 and subsequent;
certificated in any category.
Subject
(d) Air Transport Association (ATA) of
America Code 27: Flight controls.
Reason
(e) The mandatory continuing
airworthiness information (MCAI) states:
Rudder Travel Limiter (RTL) return spring,
part number (P/N) E0650–069–2750S, failed
prior to completion of the required
endurance test. In addition, the replacement
RTL return spring, P/N 670–93465–1 * * *
was found to be susceptible to chafing on the
primary actuator, which could also result in
eventual dormant spring failure. There are
two return springs in the RTL and if both
springs failed, a subsequent mechanical
disconnect of the RTL components would
result in an unannunciated failure of the
RTL. This, in turn, would permit an increase
of rudder authority beyond normal structural
limits and, in the event of a strong rudder
input, controllability of the aeroplane could
be affected.
*
*
*
*
*
Compliance
(f) You are responsible for having the
actions required by this AD performed
within the compliance times specified,
unless the actions have already been
done.
Initial Inspections and Replacement/
Repair
(g) For airplanes that have
accumulated 4,000 or less total flight
hours as of the effective date of this AD:
Before the accumulation of 6,000 total
flight hours, do a detailed inspection of
the RTL for broken return springs and
damage through the casing, or chafing of
the casing of the primary actuator, in
accordance with the Accomplishment
Instructions of Bombardier Service
Bulletin 670BA–27–055, Revision A,
dated August 6, 2010. Before further
E:\FR\FM\10NOP1.SGM
10NOP1
69032
Federal Register / Vol. 75, No. 217 / Wednesday, November 10, 2010 / Proposed Rules
flight, replace any broken return springs
with new springs, and repair or replace
with a new actuator any chafed or
damaged primary actuator, as
applicable, in accordance with the
Accomplishment Instructions of
Bombardier Service Bulletin 670BA–27–
055, Revision A, dated August 6, 2010.
Repeat the inspection thereafter at
intervals not to exceed 6,000 flight
hours.
(h) For airplanes that have
accumulated more than 4,000 total flight
hours as of the effective date of this AD:
Within 2,000 flight hours after the
effective date of this AD, do a detailed
inspection of the RTL for broken return
springs and damage through the casing,
or chafing of the casing of the primary
actuator, in accordance with the
Accomplishment Instructions of
Bombardier Service Bulletin 670BA–27–
055, Revision A, dated August 6, 2010.
Before further flight, replace any broken
return springs with new springs, and
repair or replace any chafed or damaged
primary actuator with a new actuator, as
applicable, in accordance with the
Accomplishment Instructions of
Bombardier Service Bulletin 670BA–27–
055, Revision A, dated August 6, 2010.
Repeat the inspection thereafter at
intervals not to exceed 6,000 flight
hours.
Credit for Actions Accomplished in
Accordance With Previous Service
Information
(i) Actions accomplished before the
effective date of this AD in accordance
with Bombardier Service Bulletin
670BA–27–055, dated May 11, 2010, are
considered acceptable for compliance
with the corresponding actions
specified in this AD.
applies, notify your principal
maintenance inspector (PMI) or
principal avionics inspector (PAI), as
appropriate, or lacking a principal
inspector, your local Flight Standards
District Office. The AMOC approval
letter must specifically reference this
AD.
(2) Airworthy Product: For any
requirement in this AD to obtain
corrective actions from a manufacturer
or other source, use these actions if they
are FAA-approved. Corrective actions
are considered FAA-approved if they
are approved by the State of Design
Authority (or their delegated agent). You
are required to assure the product is
airworthy before it is returned to
service.
(3) Reporting Requirements: For any
reporting requirement in this AD, under
the provisions of the Paperwork
Reduction Act (44 U.S.C. 3501 et seq.),
the Office of Management and Budget
(OMB) has approved the information
collection requirements and has
assigned OMB Control Number 2120–
0056.
Related Information
(k) Refer to MCAI Canadian
Airworthiness Directive CF–2010–18,
dated June 16, 2010; and Bombardier
Service Bulletin 670BA–27–055,
Revision A, dated August 6, 2010; for
related information.
Issued in Renton, Washington, on
November 2, 2010.
Dionne Palermo,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. 2010–28338 Filed 11–9–10; 8:45 am]
BILLING CODE 4910–13–P
FAA AD Differences
DEPARTMENT OF DEFENSE
Note 1: This AD differs from the MCAI
and/or service information as follows: No
differences.
Department of the Army, Corps of
Engineers
33 CFR Part 334
erowe on DSK5CLS3C1PROD with PROPOSALS-1
Other FAA AD Provisions
(j) The following provisions also
apply to this AD:
(1) Alternative Methods of
Compliance (AMOCs): The Manager,
New York Aircraft Certification Office
(ACO), ANE–170, FAA, has the
authority to approve AMOCs for this
AD, if requested using the procedures
found in 14 CFR 39.19. Send
information to ATTN: Program Manager,
Continuing Operational Safety, FAA,
New York ACO, 1600 Stewart Avenue,
Suite 410, Westbury, New York 11590;
telephone 516–228–7300; fax 516–794–
5531. Before using any approved AMOC
on any airplane to which the AMOC
VerDate Mar<15>2010
15:01 Nov 09, 2010
Jkt 223001
Naval Surface Warfare Center,
Potomac River, Dahlgren, VA; Danger
Zone
United States Army Corps of
Engineers, Department of Defense.
ACTION: Notice of proposed rulemaking
and request for comments.
AGENCY:
The Corps of Engineers is
proposing to amend an existing
permanent danger zone in the waters of
the Upper Machodoc Creek and the
Potomac River in the vicinity of
Dahlgren in King George County,
Virginia. The Naval Surface Warfare
Center, Dahlgren conducts research,
SUMMARY:
PO 00000
Frm 00007
Fmt 4702
Sfmt 4702
development, testing and evaluation of
national defense systems on the
Potomac River Test Range. Many of the
tests are hazardous operations
presenting a danger to persons or
property in the danger zone. The
proposed amendment is necessary to
protect the public from hazardous
operations such as firing large and small
caliber guns and projectiles, aerial
bombing, use of directed energy and
operating manned or unmanned
watercraft. The proposed amendment
adds a 100-yard buffer to the Middle
Danger Zone to prevent public contact
with unexploded ordnance along the
shoreline of Naval Surface Warfare
Center, Dahlgren within this zone.
DATES: Written comments must be
submitted on or before December 10,
2010.
ADDRESSES: You may submit comments,
identified by docket number COE–
2010–0038, by any of the following
methods:
Federal eRulemaking Portal: https://
www.regulations.gov. Follow the
instructions for submitting comments.
E-mail:
david.b.olson@usace.army.mil. Include
the docket number, COE–2010–0038, in
the subject line of the message.
Mail: U.S. Army Corps of Engineers,
Attn: CECW–CO–R (David B. Olson),
441 G Street, NW., Washington, DC
20314–1000.
Hand Delivery/Courier: Due to
security requirements, we cannot
receive comments by hand delivery or
courier.
Instructions: Direct your comments to
docket number COE–2010–0038. All
comments received will be included in
the public docket without change and
may be made available on-line at https://
www.regulations.gov, including any
personal information provided, unless
the commenter indicates that the
comment includes information claimed
to be Confidential Business Information
(CBI) or other information whose
disclosure is restricted by statute. Do
not submit information that you
consider to be CBI, or otherwise
protected, through regulations.gov or email. The regulations.gov Web site is an
anonymous access system, which means
we will not know your identity or
contact information unless you provide
it in the body of your comment. If you
send an e-mail directly to the Corps
without going through regulations.gov,
your e-mail address will be
automatically captured and included as
part of the comment that is placed in the
public docket and made available on the
Internet. If you submit an electronic
E:\FR\FM\10NOP1.SGM
10NOP1
]]>Agencies
[Federal Register Volume 75, Number 217 (Wednesday, November 10, 2010)]
[Proposed Rules]
[Pages 69030-69032]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-28338]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-1109; Directorate Identifier 2010-NM-155-AD]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc. Model CL-600-2C10
(Regional Jet Series 700, 701, & 702) Airplanes, Model CL-600-2D15
(Regional Jet Series 705) Airplanes, and Model 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:
Rudder Travel Limiter (RTL) return spring, part number (P/N) E0650-
069-2750S, failed prior to completion of the required endurance
test. In addition, the replacement RTL return spring, P/N 670-93465-
1 * * * was found to be susceptible to chafing on the primary
actuator, which could also result in eventual dormant spring
failure. There are two return springs in the RTL and if both springs
failed, a subsequent mechanical disconnect of the RTL components
would result in an unannunciated failure of the RTL. This, in turn,
would permit an increase of rudder authority beyond normal
structural limits and, in the event of a strong rudder input,
controllability of the aeroplane could be affected.
* * * * *
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 December 27,
2010.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to https://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 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec
H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-7401; e-mail
thd.crj@aero.bombardier.com; Internet https://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.
Examining the AD Docket
You may examine the AD docket on the Internet at https://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: Cesar Gomez, 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) 228-7318; 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 ADDRESSES section. Include ``Docket No. FAA-2010-1109;
Directorate Identifier 2010-NM-155-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 will post all comments we receive, without change, to https://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 (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2010-18, dated June 16, 2010 (referred to after this as ``the MCAI''),
to correct an unsafe condition for the specified products. The MCAI
states:
Rudder Travel Limiter (RTL) return spring, part number (P/N) E0650-
069-2750S, failed prior to completion of the required endurance
test. In addition, the replacement RTL return spring, P/N 670-93465-
1 (see Note) was found to be susceptible to chafing on the primary
actuator, which could also result in eventual dormant spring
failure. There are two return springs in the RTL and if both springs
failed, a subsequent mechanical disconnect of the RTL components
would result in an unannunciated failure of the RTL. This, in turn,
would permit an increase of rudder authority beyond normal
structural limits and, in the event of a strong rudder input,
controllability of the aeroplane could be affected.
Note: RTL return springs, P/N 670-93465-1, were installed in
production aeroplanes serial number 10266 (CL-600-2C10) and 15182
(CL-600-2D24) respectively and were introduced in-service by
[Bombardier] Service Bulletin (SB) 670BA-27-047. SB 670BA-27-047 has
since been superseded by [Bombardier] SB 670BA-27-055.
This directive mandates repetitive [detailed] inspection of the RTL
[for broken] return springs and [damage through the casing, or
chafing of the casing of the] primary actuator, with replacement of
parts as necessary.
[[Page 69031]]
Corrective actions include replacing any broken return springs with
new return springs, repairing any chafing of the primary actuator on
its casing, and replacing any primary actuator that has damage through
its casing with a new actuator. You may obtain further information by
examining the MCAI in the AD docket.
Relevant Service Information
Bombardier, Inc. has issued Service Bulletin 670BA-27-055, Revision
A, dated August 6, 2010. The actions described in this service
information are intended to correct the unsafe condition identified in
the MCAI.
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 477 products of U.S. registry. We also estimate that
it would take about 2 work-hours per product to comply with the basic
requirements of this proposed AD. 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 $81,090, or $170 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 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 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:
Bombardier, Inc.: Docket No. FAA-2010-1109; Directorate Identifier
2010-NM-155-AD.
Comments Due Date
(a) We must receive comments by December 27, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier, Inc. Model CL-600-2C10
(Regional Jet Series 700, 701, & 702) airplanes, serial numbers
10003 and subsequent; and Model CL-600-2D15 (Regional Jet Series
705) and Model CL-600-2D24 (Regional Jet Series 900) airplanes,
serial numbers 15001 and subsequent; certificated in any category.
Subject
(d) Air Transport Association (ATA) of America Code 27: Flight
controls.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
Rudder Travel Limiter (RTL) return spring, part number (P/N) E0650-
069-2750S, failed prior to completion of the required endurance
test. In addition, the replacement RTL return spring, P/N 670-93465-
1 * * * was found to be susceptible to chafing on the primary
actuator, which could also result in eventual dormant spring
failure. There are two return springs in the RTL and if both springs
failed, a subsequent mechanical disconnect of the RTL components
would result in an unannunciated failure of the RTL. This, in turn,
would permit an increase of rudder authority beyond normal
structural limits and, in the event of a strong rudder input,
controllability of the aeroplane could be affected.
* * * * *
Compliance
(f) You are responsible for having the actions required by this AD
performed within the compliance times specified, unless the actions
have already been done.
Initial Inspections and Replacement/Repair
(g) For airplanes that have accumulated 4,000 or less total flight
hours as of the effective date of this AD: Before the accumulation of
6,000 total flight hours, do a detailed inspection of the RTL for
broken return springs and damage through the casing, or chafing of the
casing of the primary actuator, in accordance with the Accomplishment
Instructions of Bombardier Service Bulletin 670BA-27-055, Revision A,
dated August 6, 2010. Before further
[[Page 69032]]
flight, replace any broken return springs with new springs, and repair
or replace with a new actuator any chafed or damaged primary actuator,
as applicable, in accordance with the Accomplishment Instructions of
Bombardier Service Bulletin 670BA-27-055, Revision A, dated August 6,
2010. Repeat the inspection thereafter at intervals not to exceed 6,000
flight hours.
(h) For airplanes that have accumulated more than 4,000 total
flight hours as of the effective date of this AD: Within 2,000 flight
hours after the effective date of this AD, do a detailed inspection of
the RTL for broken return springs and damage through the casing, or
chafing of the casing of the primary actuator, in accordance with the
Accomplishment Instructions of Bombardier Service Bulletin 670BA-27-
055, Revision A, dated August 6, 2010. Before further flight, replace
any broken return springs with new springs, and repair or replace any
chafed or damaged primary actuator with a new actuator, as applicable,
in accordance with the Accomplishment Instructions of Bombardier
Service Bulletin 670BA-27-055, Revision A, dated August 6, 2010. Repeat
the inspection thereafter at intervals not to exceed 6,000 flight
hours.
Credit for Actions Accomplished in Accordance With Previous Service
Information
(i) Actions accomplished before the effective date of this AD in
accordance with Bombardier Service Bulletin 670BA-27-055, dated May 11,
2010, are considered acceptable for compliance with the corresponding
actions specified in this AD.
FAA AD Differences
Note 1: This AD differs from the MCAI and/or service information
as follows: No differences.
Other FAA AD Provisions
(j) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York Aircraft Certification Office (ACO), ANE-170, FAA, has the
authority to approve AMOCs for this AD, if requested using the
procedures found in 14 CFR 39.19. Send information to ATTN: Program
Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart
Avenue, Suite 410, Westbury, New York 11590; telephone 516-228-7300;
fax 516-794-5531. Before using any approved AMOC on any airplane to
which the AMOC applies, notify your principal maintenance inspector
(PMI) or principal avionics inspector (PAI), as appropriate, or lacking
a principal inspector, your local Flight Standards District Office. The
AMOC approval letter must specifically reference this AD.
(2) Airworthy Product: For any requirement in this AD to obtain
corrective actions from a manufacturer or other source, use these
actions if they are FAA-approved. Corrective actions are considered
FAA-approved if they are approved by the State of Design Authority (or
their delegated agent). You are required to assure the product is
airworthy before it is returned to service.
(3) Reporting Requirements: For any reporting requirement in this
AD, under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501
et seq.), the Office of Management and Budget (OMB) has approved the
information collection requirements and has assigned OMB Control Number
2120-0056.
Related Information
(k) Refer to MCAI Canadian Airworthiness Directive CF-2010-18,
dated June 16, 2010; and Bombardier Service Bulletin 670BA-27-055,
Revision A, dated August 6, 2010; for related information.
Issued in Renton, Washington, on November 2, 2010.
Dionne Palermo,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-28338 Filed 11-9-10; 8:45 am]
BILLING CODE 4910-13-P
