Airworthiness Directives; Learjet Inc. Model 45 Airplanes, 38941-38943 [2010-16514]
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38941
Proposed Rules
Federal Register
Vol. 75, No. 129
Wednesday, July 7, 2010
This section of the FEDERAL REGISTER
contains notices to the public of the proposed
issuance of rules and regulations. The
purpose of these notices is to give interested
persons an opportunity to participate in the
rule making prior to the adoption of the final
rules.
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2010–0676; Directorate
Identifier 2010–NM–095–AD]
RIN 2120–AA64
Airworthiness Directives; Learjet Inc.
Model 45 Airplanes
cprice-sewell on DSK8KYBLC1PROD with PROPOSALS-1
AGENCY: Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
SUMMARY: We propose to adopt a new
airworthiness directive (AD) for certain
Learjet Inc. Model 45 airplanes. This
proposed AD would require replacing
aluminum fire extinguisher discharge
tubes with new, improved tubes;
checking the fire extinguisher container
for certain serial numbers; replacing fire
extinguisher containers that have
affected serial numbers; inspecting the
pressure indicator on certain fire
extinguisher containers for
discrepancies; and performing
corrective action if necessary. This
proposed AD results from a report of
accidental discharge of a fire
extinguisher container and damage to an
aluminum discharge tube. Investigation
revealed that following the discharge an
inaccurate pressure indication, due to
the indicator dial being incorrectly
staked, showed that the container was
fully charged. We are proposing this AD
to prevent inaccurate pressure readings
and subsequent damage to the discharge
tubes during operation, which could
result in failure of the fire extinguisher
system and an uncontained fire in an
emergency situation.
DATES: We must receive comments on
this proposed AD by August 23, 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.
VerDate Mar<15>2010
15:17 Jul 06, 2010
Jkt 220001
• 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
W12–140, 1200 New Jersey Avenue, SE.,
Washington, DC 20590, between 9 a.m.
and 5 p.m., Monday through Friday,
except Federal holidays.
For service information identified in
this proposed AD, contact Learjet, Inc.,
One Learjet Way, Wichita, Kansas
67209–2942; telephone 316–946–2000;
fax 316–946–2220; e-mail
ac.ict@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 Management Facility 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 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:
James Galstad, Aerospace Engineer,
Systems and Propulsion Branch, ACE–
116W, FAA, Wichita Aircraft
Certification Office, 1801 Airport Road,
Room 100, Mid-Continent Airport,
Wichita, Kansas 67209; telephone (316)
946–4135; fax (316) 946–4107.
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–2010–0676; Directorate Identifier
2010–NM–095–AD’’ at the beginning of
your comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
PO 00000
Frm 00001
Fmt 4702
Sfmt 4702
aspects of this proposed AD. We will
consider all comments received by the
closing date and may amend this
proposed AD because of 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
We received a report of accidental
discharge of a fire extinguisher
container and damage to an aluminum
discharge tube. Investigation revealed
that following the discharge an
inaccurate pressure indication, due to
the indicator dial being incorrectly
staked, showed that the container was
fully charged. Inaccurate pressure
readings, and subsequent damage to the
discharge tubes during operation, could
result in failure of the fire extinguisher
system and an uncontained fire in an
emergency situation.
Relevant Service Information
We have reviewed Bombardier
Service Bulletins 40–26–05 and 45–26–
9, both Revision 2, both dated May 4,
2009. The service information describes
procedures for the following:
• For all airplanes: Installing new orings and stainless steel fire
extinguisher discharge tubes and
inspect the serial numbers on the fire
extinguisher containers to determine
whether any serial number is specified
in Table 1 of the Accomplishment
Instructions of the applicable service
bulletin.
• For airplanes on which no serial
number is specified in Table 1:
Inspecting the pressure indicator on the
fire extinguisher container to ensure
that the indicator dial is not loose and
is staked in the right location, and do a
weight check of the fire extinguisher
container. If the indicator is loose or not
staked in the right location or if the
weight check for any container fails,
replacing the affected container.
• For airplanes on which any serial
number is specified in Table 1:
Replacing the affected fire extinguisher
container, and do a weight check of the
replaced containers. If the weight check
for any replacement container fails,
replacing the affected container.
E:\FR\FM\07JYP1.SGM
07JYP1
38942
Federal Register / Vol. 75, No. 129 / Wednesday, July 7, 2010 / Proposed Rules
FAA’s Determination and Requirements
of This Proposed AD
We are proposing this AD because we
evaluated all relevant information and
determined the unsafe condition
described previously is likely to exist or
develop in other products of the same
type design. This proposed AD would
require accomplishing the actions
specified in the service information
described previously.
Costs of Compliance
We estimate that this proposed AD
would affect 322 airplanes of U.S.
registry. We also estimate that it would
take 5 work-hours per product to
comply with this proposed AD. The
average labor rate is $85 per work-hour.
Required parts cost would be minimal.
Where the service information lists
required parts costs that are covered
under warranty, we have assumed that
there will be no charge for these costs.
As we do not control warranty coverage
for affected parties, some parties may
incur costs higher than estimated here.
Based on these figures, we estimate the
cost of this proposed AD to the U.S.
operators to be $136,850, or $425 per
product.
Authority for This Rulemaking
cprice-sewell on DSK8KYBLC1PROD with PROPOSALS-1
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.
You can find our regulatory
evaluation and the estimated costs of
compliance 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.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new AD:
Learjet Inc: Docket No. FAA–2010–0676;
Directorate Identifier 2010–NM–095–AD.
Comments Due Date
(a) We must receive comments by August
23, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Learjet Inc. Model
45 airplanes, certificated in any category; as
identified in Bombardier Service Bulletins
40–26–05 and 45–26–9, both Revision 2, both
dated May 4, 2009.
Subject
(d) Air Transport Association (ATA) of
America Code 26: Fire protection.
Unsafe Condition
(e) This AD results from a report of
accidental discharge of a fire extinguisher
container and damage to an aluminum
discharge tube. Investigation revealed that
following the discharge an inaccurate
pressure indication, due to the indicator dial
being incorrectly staked, showed that the
container was fully charged. The Federal
Aviation Administration is issuing this AD to
prevent inaccurate pressure readings and
subsequent damage to the discharge tubes
during operation, which could result in
failure of the fire extinguisher system and an
uncontained fire in an emergency situation.
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.
Replacement, Check, Inspection, Corrective
Action
(g) Within 12 months after the effective
date of this AD: Replace the aluminum fire
extinguisher discharge tubes with new,
improved stainless steel tubes; check the fire
extinguisher container for any serial number
specified in Table 1 of Bombardier Service
Bulletins 40–26–05 or 45–26–9, both
Revision 2, both dated May 4, 2009; as
applicable; replace any containers that have
affected serial numbers, do a weight check of
all containers, including the replacement
container, if applicable; and inspect the
pressure indicator on the containers for
discrepancies, by doing all applicable actions
in accordance with the Accomplishment
Instructions of Bombardier Service Bulletins
40–26–05 or 45–26–9, both Revision 2, both
dated May 4, 2009; as applicable. If any
discrepancy is found, replace the container
before further flight in accordance with the
Accomplishment Instructions of Bombardier
Service Bulletins 40–26–05 or 45–26–9, both
Revision 2, both dated May 4, 2009; as
applicable.
(h) Actions done before the effective date
of this AD in accordance with the applicable
service information listed in Table 1 of this
AD are acceptable for compliance with the
corresponding requirements in paragraph (g)
of this AD.
TABLE 1—CREDIT SERVICE INFORMATION
Bombardier
service bulletin—
Affected serial numbers—
For Model 45 airplanes having serial numbers 2001 through 2114, inclusive ...
For Model 45 airplanes having serial numbers 2001 through 2114, inclusive ...
For Model 45 airplanes having serial numbers 006 through 383, inclusive .......
VerDate Mar<15>2010
15:17 Jul 06, 2010
Jkt 220001
PO 00000
Frm 00002
Fmt 4702
Sfmt 4702
40–26–05
40–26–05
45-26-9
Revision—
Dated—
Basic Issue ................
1 ................................
Basic Issue ................
November 24, 2008.
December 22, 2008.
November 24, 2008.
E:\FR\FM\07JYP1.SGM
07JYP1
Federal Register / Vol. 75, No. 129 / Wednesday, July 7, 2010 / Proposed Rules
38943
TABLE 1—CREDIT SERVICE INFORMATION—Continued
Bombardier
service bulletin—
Affected serial numbers—
For Model 45 airplanes having serial numbers 006 through 383, inclusive .......
Alternative Methods of Compliance
(AMOCs)
(i)(1) The Manager, Wichita Aircraft
Certification Office (ACO), 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: James
Galstad, Aerospace Engineer, Systems and
Propulsion Branch, ACE–116W, FAA,
Wichita Aircraft Certification Office, 1801
Airport Road, Room 100, Mid-Continent
Airport, Wichita, Kansas 67209; telephone
(316) 946–4135; fax (316) 946–4107.
(2) To request a different method of
compliance or a different compliance time
for this AD, follow the procedures in 14 CFR
39.19. 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.
Issued in Renton, Washington, on June 29,
2010.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. 2010–16514 Filed 7–6–10; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2010–0672; Directorate
Identifier 2010–NM–047–AD]
RIN 2120–AA64
cprice-sewell on DSK8KYBLC1PROD with PROPOSALS-1
Airworthiness Directives; McDonnell
Douglas Corporation Model DC–10–10,
DC–10–10F, DC–10–30, DC–10–30F
(KDC–10), DC–10–40, and DC–10–40F
Airplanes
AGENCY: Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
SUMMARY: We propose to adopt a new
airworthiness directive (AD) for certain
Model DC–10–10, DC–10–10F, DC–10–
30, DC–10–30F (KDC–10), DC–10–40,
and DC–10–40F airplanes. This
proposed AD would require installing a
support bracket and coupler on the left
and right wing-to-fuselage transition,
and metallic overbraid on the left and
VerDate Mar<15>2010
15:17 Jul 06, 2010
Jkt 220001
45-26-9
right leading edge wire assembly. This
proposed AD results from fuel system
reviews conducted by the manufacturer,
as well as reports that the fuel quantity
system was affected by lightninginduced transients. We are proposing
this AD to prevent lightning-induced
transients to the fuel quantity indication
system, which could cause voltage
levels to go beyond original design
levels between fuel tank probes and
structure, and become a potential
ignition source at the fuel tank, which,
in combination with flammable fuel
vapors, could result in a fuel tank
explosion and consequent loss of the
airplane.
DATES: We must receive comments on
this proposed AD by August 23, 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
W12–140, 1200 New Jersey Avenue, SE.,
Washington, DC 20590, between 9 a.m.
and 5 p.m., Monday through Friday,
except Federal holidays.
For service information identified in
this proposed AD, contact Boeing
Commercial Airplanes, Attention: Data
& Services Management, 3855
Lakewood Boulevard, MC D800–0019,
Long Beach, California 90846–0001;
telephone 206–544–5000, extension 2;
fax 206–766–5683; e-mail
dse.boecom@boeing.com; Internet
https://www.myboeingfleet.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 Management Facility between 9
PO 00000
Frm 00003
Fmt 4702
Sfmt 4702
Revision—
Dated—
1 ................................
December 22, 2008.
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 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:
Samuel Lee, Aerospace Engineer,
Propulsion Branch, ANM–140L, FAA,
Los Angeles Aircraft Certification Office
(ACO), 3960 Paramount Boulevard,
Lakewood, California 90712–4137;
telephone (562) 627–5262; fax (562)
627–5210.
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–2010–0672; Directorate Identifier
2010–NM–047–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 because of 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
The FAA has examined the
underlying safety issues involved in fuel
tank explosions on several large
transport airplanes, including the
adequacy of existing regulations, the
service history of airplanes subject to
those regulations, and existing
maintenance practices for fuel tank
systems. As a result of those findings,
we issued a regulation titled ‘‘Transport
Airplane Fuel Tank System Design
Review, Flammability Reduction and
Maintenance and Inspection
Requirements’’ (66 FR 23086, May 7,
2001). In addition to new airworthiness
E:\FR\FM\07JYP1.SGM
07JYP1
Agencies
[Federal Register Volume 75, Number 129 (Wednesday, July 7, 2010)]
[Proposed Rules]
[Pages 38941-38943]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-16514]
========================================================================
Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
========================================================================
Federal Register / Vol. 75, No. 129 / Wednesday, July 7, 2010 /
Proposed Rules
[[Page 38941]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0676; Directorate Identifier 2010-NM-095-AD]
RIN 2120-AA64
Airworthiness Directives; Learjet Inc. Model 45 Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: We propose to adopt a new airworthiness directive (AD) for
certain Learjet Inc. Model 45 airplanes. This proposed AD would require
replacing aluminum fire extinguisher discharge tubes with new, improved
tubes; checking the fire extinguisher container for certain serial
numbers; replacing fire extinguisher containers that have affected
serial numbers; inspecting the pressure indicator on certain fire
extinguisher containers for discrepancies; and performing corrective
action if necessary. This proposed AD results from a report of
accidental discharge of a fire extinguisher container and damage to an
aluminum discharge tube. Investigation revealed that following the
discharge an inaccurate pressure indication, due to the indicator dial
being incorrectly staked, showed that the container was fully charged.
We are proposing this AD to prevent inaccurate pressure readings and
subsequent damage to the discharge tubes during operation, which could
result in failure of the fire extinguisher system and an uncontained
fire in an emergency situation.
DATES: We must receive comments on this proposed AD by August 23, 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 W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
For service information identified in this proposed AD, contact
Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942; telephone
316-946-2000; fax 316-946-2220; e-mail ac.ict@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 Management Facility
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 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: James Galstad, Aerospace Engineer,
Systems and Propulsion Branch, ACE-116W, FAA, Wichita Aircraft
Certification Office, 1801 Airport Road, Room 100, Mid-Continent
Airport, Wichita, Kansas 67209; telephone (316) 946-4135; fax (316)
946-4107.
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-2010-0676;
Directorate Identifier 2010-NM-095-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 because of 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
We received a report of accidental discharge of a fire extinguisher
container and damage to an aluminum discharge tube. Investigation
revealed that following the discharge an inaccurate pressure
indication, due to the indicator dial being incorrectly staked, showed
that the container was fully charged. Inaccurate pressure readings, and
subsequent damage to the discharge tubes during operation, could result
in failure of the fire extinguisher system and an uncontained fire in
an emergency situation.
Relevant Service Information
We have reviewed Bombardier Service Bulletins 40-26-05 and 45-26-9,
both Revision 2, both dated May 4, 2009. The service information
describes procedures for the following:
For all airplanes: Installing new o-rings and stainless
steel fire extinguisher discharge tubes and inspect the serial numbers
on the fire extinguisher containers to determine whether any serial
number is specified in Table 1 of the Accomplishment Instructions of
the applicable service bulletin.
For airplanes on which no serial number is specified in
Table 1: Inspecting the pressure indicator on the fire extinguisher
container to ensure that the indicator dial is not loose and is staked
in the right location, and do a weight check of the fire extinguisher
container. If the indicator is loose or not staked in the right
location or if the weight check for any container fails, replacing the
affected container.
For airplanes on which any serial number is specified in
Table 1: Replacing the affected fire extinguisher container, and do a
weight check of the replaced containers. If the weight check for any
replacement container fails, replacing the affected container.
[[Page 38942]]
FAA's Determination and Requirements of This Proposed AD
We are proposing this AD because we evaluated all relevant
information and determined the unsafe condition described previously is
likely to exist or develop in other products of the same type design.
This proposed AD would require accomplishing the actions specified in
the service information described previously.
Costs of Compliance
We estimate that this proposed AD would affect 322 airplanes of
U.S. registry. We also estimate that it would take 5 work-hours per
product to comply with this proposed AD. The average labor rate is $85
per work-hour. Required parts cost would be minimal. Where the service
information lists required parts costs that are covered under warranty,
we have assumed that there will be no charge for these costs. As we do
not control warranty coverage for affected parties, some parties may
incur costs higher than estimated here. Based on these figures, we
estimate the cost of this proposed AD to the U.S. operators to be
$136,850, or $425 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.
You can find our regulatory evaluation and the estimated costs of
compliance 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:
Learjet Inc: Docket No. FAA-2010-0676; Directorate Identifier 2010-
NM-095-AD.
Comments Due Date
(a) We must receive comments by August 23, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Learjet Inc. Model 45 airplanes,
certificated in any category; as identified in Bombardier Service
Bulletins 40-26-05 and 45-26-9, both Revision 2, both dated May 4,
2009.
Subject
(d) Air Transport Association (ATA) of America Code 26: Fire
protection.
Unsafe Condition
(e) This AD results from a report of accidental discharge of a
fire extinguisher container and damage to an aluminum discharge
tube. Investigation revealed that following the discharge an
inaccurate pressure indication, due to the indicator dial being
incorrectly staked, showed that the container was fully charged. The
Federal Aviation Administration is issuing this AD to prevent
inaccurate pressure readings and subsequent damage to the discharge
tubes during operation, which could result in failure of the fire
extinguisher system and an uncontained fire in an emergency
situation.
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.
Replacement, Check, Inspection, Corrective Action
(g) Within 12 months after the effective date of this AD:
Replace the aluminum fire extinguisher discharge tubes with new,
improved stainless steel tubes; check the fire extinguisher
container for any serial number specified in Table 1 of Bombardier
Service Bulletins 40-26-05 or 45-26-9, both Revision 2, both dated
May 4, 2009; as applicable; replace any containers that have
affected serial numbers, do a weight check of all containers,
including the replacement container, if applicable; and inspect the
pressure indicator on the containers for discrepancies, by doing all
applicable actions in accordance with the Accomplishment
Instructions of Bombardier Service Bulletins 40-26-05 or 45-26-9,
both Revision 2, both dated May 4, 2009; as applicable. If any
discrepancy is found, replace the container before further flight in
accordance with the Accomplishment Instructions of Bombardier
Service Bulletins 40-26-05 or 45-26-9, both Revision 2, both dated
May 4, 2009; as applicable.
(h) Actions done before the effective date of this AD in
accordance with the applicable service information listed in Table 1
of this AD are acceptable for compliance with the corresponding
requirements in paragraph (g) of this AD.
Table 1--Credit Service Information
----------------------------------------------------------------------------------------------------------------
Bombardier
Affected serial numbers-- service Revision-- Dated--
bulletin--
----------------------------------------------------------------------------------------------------------------
For Model 45 airplanes having 40-26-05 Basic Issue................... November 24, 2008.
serial numbers 2001 through
2114, inclusive.
For Model 45 airplanes having 40-26-05 1............................. December 22, 2008.
serial numbers 2001 through
2114, inclusive.
For Model 45 airplanes having 45[dash]26[das Basic Issue................... November 24, 2008.
serial numbers 006 through 383, h]9
inclusive.
[[Page 38943]]
For Model 45 airplanes having 45[dash]26[das 1............................. December 22, 2008.
serial numbers 006 through 383, h]9
inclusive.
----------------------------------------------------------------------------------------------------------------
Alternative Methods of Compliance (AMOCs)
(i)(1) The Manager, Wichita Aircraft Certification Office (ACO),
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: James Galstad, Aerospace Engineer, Systems and Propulsion
Branch, ACE-116W, FAA, Wichita Aircraft Certification Office, 1801
Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas
67209; telephone (316) 946-4135; fax (316) 946-4107.
(2) To request a different method of compliance or a different
compliance time for this AD, follow the procedures in 14 CFR 39.19.
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.
Issued in Renton, Washington, on June 29, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-16514 Filed 7-6-10; 8:45 am]
BILLING CODE 4910-13-P