Airworthiness Directives; Boeing Model 737-600, -700, -700C, -800, and -900 Series Airplanes, 21242-21244 [E8-8328]
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21242
Federal Register / Vol. 73, No. 77 / Monday, April 21, 2008 / Rules and Regulations
Authority for This Rulemaking
§ 39.13
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.
I
Regulatory Findings
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.
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.
Adoption of the Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
follows:
rfrederick on PROD1PC67 with RULES
I
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
I
Authority: 49 U.S.C. 106(g), 40113, 44701.
VerDate Aug<31>2005
15:19 Apr 18, 2008
Jkt 214001
[Amended]
2. The FAA amends § 39.13 by adding
the following new AD:
2008–08–25 Boeing: Amendment 39–15479.
Docket No. FAA–2006–26726;
Directorate Identifier 2006–NM–205–AD.
Effective Date
(a) This airworthiness directive (AD) is
effective May 27, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing Model 747–
400F airplanes as identified in Boeing Alert
Service Bulletin 747–25A3370, Revision 1,
dated April 27, 2006; and Model 747–400
series airplanes as identified in Boeing Alert
Service Bulletin 747–25A3526, dated
November 13, 2007; certificated in any
category.
Unsafe Condition
(d) This AD results from a report that water
from the dripshield entered the card file and
damaged a circuit card, causing the AFT
CARGO FIRE MSG message to be illuminated
and resulting in an air turn back. We are
issuing this AD to prevent water from
entering the card file and damaging a circuit
card. Failure of one or more of the 15 fuel
system circuit cards in the card file could
cause loss of fuel management, which could
cause unavailability of fuel. Failure of one or
more of the 35 fire detection circuit cards
could cause a false message of a fire, or no
message of a fire when there is a fire.
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.
Installation
(f) Within 24 months after the effective
date of this AD, install two drains and drain
tubes in the dripshield above the M826 Card
File over the nose wheel left side in the main
equipment center at station 400, in
accordance with the Accomplishment
Instructions of Boeing Alert Service Bulletin
747–25A3370, Revision 1, dated April 27,
2006 (for Model 747–400F series airplanes);
or Boeing Alert Service Bulletin 747–
25A3526, dated November 13, 2007 (for
Model 747–400 series airplanes).
Installation According to Previous Issue of
Service Bulletin
(g) Installing the drains and drain tubes is
also acceptable for compliance with the
requirements of paragraph (f) of this AD if
done before the effective date of this AD in
accordance with Boeing Alert Service
Bulletin 747–25A3370, dated September 8,
2005.
Alternative Methods of Compliance
(AMOCs)
(h)(1) The Manager, Seattle 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.
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(2) Before using any AMOC approved in
accordance with § 39.19 on any airplane to
which the AMOC applies, notify the
appropriate principal inspector in the FAA
Flight Standards Certificate Holding District
Office.
Material Incorporated by Reference
(i) You must use Boeing Alert Service
Bulletin 747–25A3370, Revision 1, dated
April 27, 2006; or Boeing Alert Service
Bulletin 747–25A3526, dated November 13,
2007; as applicable; to do the actions
required by this AD, unless the AD specifies
otherwise.
(1) The Director of the Federal Register
approved the incorporation by reference of
this service information under 5 U.S.C.
552(a) and 1 CFR part 51.
(2) For service information identified in
this AD, contact Boeing Commercial
Airplanes, P.O. Box 3707, Seattle,
Washington 98124–2207.
(3) You may review copies of the service
information incorporated by reference at the
FAA, Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington; or at
the National Archives and Records
Administration (NARA). For information on
the availability of this material at NARA, call
202–741–6030, or go to: https://
www.archives.gov/federal_register/
code_of_federal_regulations/
ibr_locations.html.
Issued in Renton, Washington, on April 7,
2008.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E8–8327 Filed 4–18–08; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2007–0049; Directorate
Identifier 2007–NM–168–AD; Amendment
39–15478; AD 2008–08–24]
RIN 2120–AA64
Airworthiness Directives; Boeing
Model 737–600, –700, –700C, –800, and
–900 Series Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
AGENCY:
SUMMARY: We are adopting a new
airworthiness directive (AD) for certain
Boeing Model 737–600, –700, –700C,
–800, and –900 series airplanes. This
AD requires replacing the drain tube
assemblies and support clamps on the
aft fairing of the engine struts. This AD
results from reports of failure of the
drain tube assembly and clamp on the
aft fairings of an engine strut. We are
issuing this AD to prevent failure of the
E:\FR\FM\21APR1.SGM
21APR1
Federal Register / Vol. 73, No. 77 / Monday, April 21, 2008 / Rules and Regulations
drain tube assemblies and clamps on the
aft fairings of the of the engine struts.
Such a failure could allow leaked
flammable fluids in the drain systems to
discharge on to the heat shields of the
aft fairings of the engine struts, which
could result in an undetected and
uncontrollable fire.
DATES: This AD is effective May 27,
2008.
The Director of the Federal Register
approved the incorporation by reference
of a certain publication listed in this AD
as of May 27, 2008.
ADDRESSES: For service information
identified in this AD, contact Boeing
Commercial Airplanes, P.O. Box 3707,
Seattle, Washington 98124–2207.
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 AD, the regulatory
evaluation, any comments received, and
other information. The address for the
Docket Office (telephone 800–647–5527)
is the Document Management Facility,
U.S. Department of Transportation,
Docket Operations, M–30, West
Building Ground Floor, Room W12–140,
1200 New Jersey Avenue, SE.,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Samuel Spitzer, Aerospace Engineer,
Propulsion Branch, ANM–140S, FAA,
Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton,
Washington 98057–3356; telephone
(425) 917–6510; fax (425) 917–6590.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 to include an airworthiness
directive (AD) that would apply to
certain Boeing Model 737–600, –700,
–700C, –800, and –900 series airplanes.
That NPRM was published in the
Federal Register on October 17, 2007
(72 FR 58773). That NPRM proposed to
require replacing the drain tube
assemblies and support clamps on the
aft fairings of the engine struts.
rfrederick on PROD1PC67 with RULES
Comments
We gave the public the opportunity to
participate in developing this AD. We
considered the comments received from
the two commenters.
Support for the NPRM
Boeing supports the NPRM.
VerDate Aug<31>2005
15:19 Apr 18, 2008
Jkt 214001
Request for Revision of Compliance
Time
The Air Transport Association (ATA),
on behalf of a member, American
Airlines, requests that the compliance
time specified in paragraph (f) of the
NPRM be revised from 60 to 72 months.
The ATA states that the operators’
routine maintenance schedules may not
allow for accomplishment of the
proposed replacement on affected
aircraft within the proposed compliance
time, and thus operators would incur
additional costs associated with special
scheduling.
We do not agree with the commenter’s
request to extend the compliance time.
In developing an appropriate
compliance time for this action, we
considered the urgency associated with
the subject unsafe condition, the
availability of required parts, and the
practical aspect of accomplishing the
required replacement within a period of
time that corresponds to the normal
scheduled maintenance for most
affected operators. However, according
to the provisions of paragraph (g) of the
final rule, we may approve requests to
adjust the compliance time if the
request includes data that prove that the
new compliance time would provide an
acceptable level of safety.
Request To Change the Work Hours of
the ‘‘Costs of Compliance’’ Section
The ATA also requests that the work
hours specified in the ‘‘Costs of
Compliance’’ section of the NPRM be
changed from 4 to 10.5 work hours. The
ATA states that Boeing Special
Attention Service Bulletin 737–54–
1043, dated May 2, 2007 (referred to as
the appropriate source of service
information for accomplishing the
proposed actions in the NPRM),
includes 7 work hours for open and
close access. The ATA states that such
a change will provide a better
representation of the time included in
the service bulletin.
We do not agree with the ATA’s
request to increase the work hours
specified in the ‘‘Costs of Compliance’’
section of the NPRM. That section
describes only the direct costs of the
specific actions required by this AD.
Based on the best data available, the
manufacturer provided the number of
work hours (four) necessary to do the
required actions. This number
represents the time necessary to perform
only the actions actually required by
this AD. We recognize that, in doing the
actions required by an AD, operators
might incur incidental costs in addition
to the direct costs. The cost analysis in
AD rulemaking actions, however,
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21243
typically does not include incidental
costs such as the time required to gain
access and close up, time necessary for
planning, or time necessitated by other
administrative actions. Those incidental
costs, which might vary significantly
among operators, are almost impossible
to calculate. Therefore, we have made
no change to the AD in this regard.
Clarification of Replacement
For clarification purposes, we have
revised paragraph (f) from: ‘‘Within 60
months after the effective date of this
AD, remove the drain tube assemblies
and support clamps on the aft fairing of
the struts of engine number 1 and
engine number 2. These are to be
replaced with new drain tube
assemblies and clamps * * *’’ to:
‘‘Within 60 months after the effective
date of this AD, replace the drain tube
assemblies and support clamps on the
aft fairing of the struts of engine number
1 and engine number 2 with new drain
tube assemblies and clamps * * *’’ to
provide consistency of terminology.
Conclusion
We reviewed the relevant data,
considered the comments received, and
determined that air safety and the
public interest require adopting the AD
with the change described previously.
We also determined that this change
will not increase the economic burden
on any operator or increase the scope of
the AD.
Costs of Compliance
There are about 2,058 airplanes of the
affected design in the worldwide fleet.
This AD affects about 721 airplanes of
U.S. registry. The actions take about 4
work hours per airplane, at an average
labor rate of $80 per work hour.
Required parts cost about $2,351 per
airplane. Based on these figures, the
estimated cost of this AD for U.S.
operators is $1,925,791, or $2,671 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
E:\FR\FM\21APR1.SGM
21APR1
21244
Federal Register / Vol. 73, No. 77 / Monday, April 21, 2008 / Rules and Regulations
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
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.
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.
Adoption of the Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as
follows:
I
PART 39—AIRWORTHINESS
DIRECTIVES
Authority: 49 U.S.C. 106(g), 40113, 44701.
[Amended]
2. The FAA amends § 39.13 by adding
the following new AD:
I
2008–08–24 Boeing: Amendment 39–15478.
Docket No. FAA–2007–0049; Directorate
Identifier 2007–NM–168–AD.
rfrederick on PROD1PC67 with RULES
Effective Date
(a) This airworthiness directive (AD) is
effective May 27, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing Model 737–
600, –700, –700C, –800, and –900 series
airplanes, certificated in any category; as
VerDate Aug<31>2005
15:19 Apr 18, 2008
Jkt 214001
Unsafe Condition
(d) This AD results from reports of failure
of the drain tube assembly and support
clamp on the aft fairing of an engine strut.
We are issuing this AD to prevent failure of
the drain tube assemblies and clamps on the
aft fairings of the engine struts. Such a failure
could allow leaked flammable fluids in the
drain systems to discharge on to the heat
shields of the aft fairings of the engine struts,
which could result in an undetected and
uncontrollable fire.
Issued in Renton, Washington, on April 8,
2008.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E8–8328 Filed 4–18–08; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
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.
[Docket No. FAA–2008–0196; Directorate
Identifier 2008–CE–002–AD; Amendment
39–15482; AD 2008–09–02]
RIN 2120–AA64
Replacement
(f) Within 60 months after the effective
date of this AD, replace the drain tube
assemblies and support clamps on the aft
fairing of the struts of engine number 1 and
engine number 2 with new drain tube
assemblies and clamps, in accordance with
the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 737–54–
1043, dated May 2, 2007.
Alternative Methods of Compliance
(AMOCs)
(g)(1) The Manager, Seattle 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.
(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 appropriate principal inspector
(PI) in the FAA Flight Standards District
Office (FSDO), or lacking a PI, your local
FSDO.
Material Incorporated by Reference
1. The authority citation for part 39
continues to read as follows:
I
§ 39.13
identified in Boeing Special Attention
Service Bulletin 737–54–1043, dated May 2,
2007.
(h) You must use Boeing Special Attention
Service Bulletin 737–54–1043, dated May 2,
2007, to do the actions required by this AD,
unless the AD specifies otherwise.
(1) The Director of the Federal Register
approved the incorporation by reference of
this service information under 5 U.S.C.
552(a) and 1 CFR part 51.
(2) For service information identified in
this AD, contact Boeing Commercial
Airplanes, P.O. Box 3707, Seattle,
Washington 98124–2207.
(3) You may review copies of the service
information incorporated by reference at the
FAA, Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington; or at
the National Archives and Records
Administration (NARA). For information on
the availability of this material at NARA, call
202–741–6030, or go to: https://
www.archives.gov/federal_register/
code_of_federal_regulations/
ibr_locations.html.
PO 00000
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Fmt 4700
Sfmt 4700
Airworthiness Directives; APEX
Aircraft Model CAP 10B Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
AGENCY:
SUMMARY: We are superseding an
existing airworthiness directive (AD) for
the products listed above. This AD
results from mandatory continuing
airworthiness information (MCAI)
issued 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:
Further to a new fracture in flight of a CAP
10B wing in June 2003, the investigation in
process seems to point out that a wrong
application of CAP 10B Service Bulletin No.
16 (CAP 10B–57–004) would lead to the
impossibility of detecting the potential spar
damage while performing the Type
Certificate holder upper spar flange
inspection.
We are issuing this AD to require
actions to correct the unsafe condition
on these products.
DATES: This AD becomes effective May
27, 2008.
On May 27, 2008, the Director of the
Federal Register approved the
incorporation by reference of APEX
Aircraft Document No. 1000913GB,
dated February 4, 2002; APEX Aircraft
Document No. 1000914GB, dated
February 4, 2002; and APEX Aircraft
Document No. 1000915GB, dated
February 4, 2002, listed in this AD.
As of July 23, 1993 (58 FR 31342, June
2, 1993), the Director of the Federal
Register approved the incorporation by
reference of Avions Mudry & CIE
Service Bulletin CAP 10B No. 16, dated
April 27, 1992, listed in this AD.
ADDRESSES: You may examine the AD
docket on the Internet at https://
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21APR1
]]>Agencies
[Federal Register Volume 73, Number 77 (Monday, April 21, 2008)]
[Rules and Regulations]
[Pages 21242-21244]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-8328]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2007-0049; Directorate Identifier 2007-NM-168-AD;
Amendment 39-15478; AD 2008-08-24]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 737-600, -700, -700C, -
800, and -900 Series Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes.
This AD requires replacing the drain tube assemblies and support clamps
on the aft fairing of the engine struts. This AD results from reports
of failure of the drain tube assembly and clamp on the aft fairings of
an engine strut. We are issuing this AD to prevent failure of the
[[Page 21243]]
drain tube assemblies and clamps on the aft fairings of the of the
engine struts. Such a failure could allow leaked flammable fluids in
the drain systems to discharge on to the heat shields of the aft
fairings of the engine struts, which could result in an undetected and
uncontrollable fire.
DATES: This AD is effective May 27, 2008.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of May 27,
2008.
ADDRESSES: For service information identified in this AD, contact
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-
2207.
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 AD, the regulatory evaluation,
any comments received, and other information. The address for the
Docket Office (telephone 800-647-5527) is the Document Management
Facility, U.S. Department of Transportation, Docket Operations, M-30,
West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE.,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Samuel Spitzer, Aerospace Engineer,
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification
Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone
(425) 917-6510; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to include an airworthiness directive (AD) that would apply to
certain Boeing Model 737-600, -700, -700C, -800, and -900 series
airplanes. That NPRM was published in the Federal Register on October
17, 2007 (72 FR 58773). That NPRM proposed to require replacing the
drain tube assemblies and support clamps on the aft fairings of the
engine struts.
Comments
We gave the public the opportunity to participate in developing
this AD. We considered the comments received from the two commenters.
Support for the NPRM
Boeing supports the NPRM.
Request for Revision of Compliance Time
The Air Transport Association (ATA), on behalf of a member,
American Airlines, requests that the compliance time specified in
paragraph (f) of the NPRM be revised from 60 to 72 months. The ATA
states that the operators' routine maintenance schedules may not allow
for accomplishment of the proposed replacement on affected aircraft
within the proposed compliance time, and thus operators would incur
additional costs associated with special scheduling.
We do not agree with the commenter's request to extend the
compliance time. In developing an appropriate compliance time for this
action, we considered the urgency associated with the subject unsafe
condition, the availability of required parts, and the practical aspect
of accomplishing the required replacement within a period of time that
corresponds to the normal scheduled maintenance for most affected
operators. However, according to the provisions of paragraph (g) of the
final rule, we may approve requests to adjust the compliance time if
the request includes data that prove that the new compliance time would
provide an acceptable level of safety.
Request To Change the Work Hours of the ``Costs of Compliance'' Section
The ATA also requests that the work hours specified in the ``Costs
of Compliance'' section of the NPRM be changed from 4 to 10.5 work
hours. The ATA states that Boeing Special Attention Service Bulletin
737-54-1043, dated May 2, 2007 (referred to as the appropriate source
of service information for accomplishing the proposed actions in the
NPRM), includes 7 work hours for open and close access. The ATA states
that such a change will provide a better representation of the time
included in the service bulletin.
We do not agree with the ATA's request to increase the work hours
specified in the ``Costs of Compliance'' section of the NPRM. That
section describes only the direct costs of the specific actions
required by this AD. Based on the best data available, the manufacturer
provided the number of work hours (four) necessary to do the required
actions. This number represents the time necessary to perform only the
actions actually required by this AD. We recognize that, in doing the
actions required by an AD, operators might incur incidental costs in
addition to the direct costs. The cost analysis in AD rulemaking
actions, however, typically does not include incidental costs such as
the time required to gain access and close up, time necessary for
planning, or time necessitated by other administrative actions. Those
incidental costs, which might vary significantly among operators, are
almost impossible to calculate. Therefore, we have made no change to
the AD in this regard.
Clarification of Replacement
For clarification purposes, we have revised paragraph (f) from:
``Within 60 months after the effective date of this AD, remove the
drain tube assemblies and support clamps on the aft fairing of the
struts of engine number 1 and engine number 2. These are to be replaced
with new drain tube assemblies and clamps * * *'' to: ``Within 60
months after the effective date of this AD, replace the drain tube
assemblies and support clamps on the aft fairing of the struts of
engine number 1 and engine number 2 with new drain tube assemblies and
clamps * * *'' to provide consistency of terminology.
Conclusion
We reviewed the relevant data, considered the comments received,
and determined that air safety and the public interest require adopting
the AD with the change described previously. We also determined that
this change will not increase the economic burden on any operator or
increase the scope of the AD.
Costs of Compliance
There are about 2,058 airplanes of the affected design in the
worldwide fleet. This AD affects about 721 airplanes of U.S. registry.
The actions take about 4 work hours per airplane, at an average labor
rate of $80 per work hour. Required parts cost about $2,351 per
airplane. Based on these figures, the estimated cost of this AD for
U.S. operators is $1,925,791, or $2,671 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
[[Page 21244]]
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
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.
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.
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 AD:
2008-08-24 Boeing: Amendment 39-15478. Docket No. FAA-2007-0049;
Directorate Identifier 2007-NM-168-AD.
Effective Date
(a) This airworthiness directive (AD) is effective May 27, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing Model 737-600, -700, -700C, -800,
and -900 series airplanes, certificated in any category; as
identified in Boeing Special Attention Service Bulletin 737-54-1043,
dated May 2, 2007.
Unsafe Condition
(d) This AD results from reports of failure of the drain tube
assembly and support clamp on the aft fairing of an engine strut. We
are issuing this AD to prevent failure of the drain tube assemblies
and clamps on the aft fairings of the engine struts. Such a failure
could allow leaked flammable fluids in the drain systems to
discharge on to the heat shields of the aft fairings of the engine
struts, which could result in an undetected and uncontrollable fire.
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.
Replacement
(f) Within 60 months after the effective date of this AD,
replace the drain tube assemblies and support clamps on the aft
fairing of the struts of engine number 1 and engine number 2 with
new drain tube assemblies and clamps, in accordance with the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 737-54-1043, dated May 2, 2007.
Alternative Methods of Compliance (AMOCs)
(g)(1) The Manager, Seattle 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.
(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 appropriate principal inspector (PI) in the FAA
Flight Standards District Office (FSDO), or lacking a PI, your local
FSDO.
Material Incorporated by Reference
(h) You must use Boeing Special Attention Service Bulletin 737-
54-1043, dated May 2, 2007, to do the actions required by this AD,
unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington
98124-2207.
(3) You may review copies of the service information
incorporated by reference at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the
National Archives and Records Administration (NARA). For information
on the availability of this material at NARA, call 202-741-6030, or
go to: https://www.archives.gov/federal_register/code_of_federal_
regulations/ibr_locations.html.
Issued in Renton, Washington, on April 8, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E8-8328 Filed 4-18-08; 8:45 am]
BILLING CODE 4910-13-P
