Airworthiness Directives; Boeing Model 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SP Series Airplanes, 54533-54535 [E7-18747]

Download as PDF Federal Register / Vol. 72, No. 186 / Wednesday, September 26, 2007 / Rules and Regulations full-scale test, there are other approaches using tests and analysis that can actually yield more data than would a single test. Thus, we consider it more effective to establish the standards and encourage the applicant to develop the most effective method of compliance. The FAA agrees that fuselage postcrash fire survivability of the 787, including FST hazards that may be associated with use of carbon fiber epoxy structure, is an important issue. This issue is outside the scope of these special conditions, however. It is being addressed in conjunction with the requirements for § 25.856(b) relating to fuselage fire penetration protection. These special conditions are adopted as proposed. Applicability As discussed above, these special conditions are applicable to the 787. Should Boeing apply at a later date for a change to the type certificate to include another model on the same type certificate incorporating the same novel or unusual design features, these special conditions would apply to that model as well. Conclusion This action affects only certain novel or unusual design features of the 787. It is not a rule of general applicability. List of Subjects in 14 CFR Part 25 Aircraft, Aviation safety, Reporting and recordkeeping requirements. The authority citation for these special conditions is as follows: rmajette on PROD1PC64 with RULES Authority: 49 U.S.C. 106(g), 40113, 44701, 44702, 44704. The Special Conditions Accordingly, pursuant to the authority delegated to me by the Administrator, the following special conditions are issued as part of the type certification basis for the Boeing Model 787–8 airplane. The Boeing Model 787–8 must provide an equivalent level of occupant safety and survivability to that provided by previously certificated wide-body transports of similar size under foreseeable survivable impact events for the following four criteria. In order to demonstrate an equivalent level of occupant safety and survivability, the applicant must demonstrate that the Model 787–8 meets the following criteria for a range of airplane vertical descent velocities up to 30 ft/sec. 1. Retention of items of mass. The occupants, i.e., passengers, flight attendants, and flightcrew, must be protected during the impact event from release of seats, overhead bins, and VerDate Aug<31>2005 15:42 Sep 25, 2007 Jkt 211001 other items of mass due to the impact loads and resultant structural deformation of the supporting airframe and floor structures. The applicant must show that loads due to the impact event and resultant structural deformation of the supporting airframe and floor structure at the interface of the airplane structure to seats, overhead bins, and other items of mass are comparable to those of previously certificated widebody transports of similar size for the range of descent velocities stated above. The attachments of these items need not be designed for static emergency landing loads in excess of those defined in § 25.561 if impact response characteristics of the Boeing Model 787– 8 yield load factors at the attach points that are comparable to those for a previously certificated wide-body transport category airplane. 2. Maintenance of acceptable acceleration and loads experienced by the occupants. The applicant must show that the impact response characteristics of the Boeing Model 787–8, specifically the vertical acceleration levels experienced at the seat/floor interface and loads experienced by the occupants during the impact events, are consistent with those found in § 25.562(b) or with levels expected for a previously certificated wide-body transport category airplane for the conditions stated above. 3. Maintenance of a survivable volume. For the conditions stated above, the applicant must show that all areas of the airplane occupied for takeoff and landing provide a survivable volume comparable to that of previously certificated wide-body transports of similar size during and after the impact event. This means that structural deformation will not result in infringement of the occupants’ normal living space so that passenger survivability will not be significantly affected. 4. Maintenance of occupant emergency egress paths. The evacuation of occupants must be comparable to that from a previously certificated widebody transport of similar size. To show this, the applicant must show that the suitability of the egress paths, as determined following the vertical impact events, is comparable to the suitability of the egress paths of a comparable, certificated wide-body transport, as determined following the same vertical impact events. PO 00000 Frm 00015 Fmt 4700 Sfmt 4700 54533 Issued in Renton, Washington, on September 14, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7–18942 Filed 9–25–07; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2007–28349; Directorate Identifier 2007–NM–025–AD; Amendment 39–15211; AD 2007–20–01] RIN 2120–AA64 Airworthiness Directives; Boeing Model 747–100B SUD, 747–200B, 747– 200C, 747–200F, 747–300, 747–400, 747–400D, 747–400F, and 747SP Series Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747–100B SUD, 747– 200B, 747–200C, 747–200F, 747–300, 747–400, 747–400D, 747–400F, and 747SP series airplanes. This AD requires reconfiguring the clamps of certain wire bundles and applying insulating sealant to certain fasteners inside the fuel tanks. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to prevent arcing inside the fuel tanks in the event of a lightning strike or high-powered short circuit, which could result in a fuel tank explosion or fire. DATES: This AD becomes effective October 31, 2007. The Director of the Federal Register approved the incorporation by reference of certain publications listed in the AD as of October 31, 2007. ADDRESSES: You may examine the AD docket on the Internet at https:// dms.dot.gov or in person at the U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for service information identified in this AD. FOR FURTHER INFORMATION CONTACT: Sulmo Mariano, Aerospace Engineer, Propulsion Branch, ANM–140S, FAA, Seattle Aircraft Certification Office, E:\FR\FM\26SER1.SGM 26SER1 54534 Federal Register / Vol. 72, No. 186 / Wednesday, September 26, 2007 / Rules and Regulations received, and determined that air safety and the public interest require adopting the AD as proposed. 1601 Lind Avenue, SW., Renton, Washington 98057–3356; telephone (425) 917–6501; fax (425) 917–6590. SUPPLEMENTARY INFORMATION: Examining the Docket You may examine the AD docket on the Internet at https://dms.dot.gov or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Operations office (telephone (800) 647–5527) is located on the ground floor of the West Building at the DOT street address stated in the ADDRESSES section. Discussion The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to certain Boeing Model 747– 100B SUD, 747–200B, 747–200C, 747– 200F, 747–300, 747–400, 747–400D, 747–400F, and 747SP series airplanes. That NPRM was published in the Federal Register on June 5, 2007 (72 FR 30999). That NPRM proposed to require reconfiguring the clamps of certain wire bundles and applying insulating sealant to certain fasteners inside the fuel tanks. rmajette on PROD1PC64 with RULES Comments We provided the public the opportunity to participate in the development of this AD. We have considered the single comment received. Request To Add Information About New Clamp Design Boeing requests that we add information about the design of the replacement clamps. Boeing asserts that the second paragraph of the Relevant Service Information section of the NPRM does not describe how the new clamps protect the wire bundle. Boeing explains that the new clamps are of a different design and have additional protection on their edges. Boeing therefore requests that we revise the described paragraph to read ‘‘* * * installing new, larger clamps, which contain additional protection against metal to bundle contact, * * *.’’ We partially agree with this request. We agree that this information clarifies the nature of the modification developed to address the unsafe condition; however, the Relevant Service Information section of the NPRM is not retained in the final rule. Therefore, we find that no change to the AD is necessary in this regard. Conclusion We have carefully reviewed the available data, including the comment VerDate Aug<31>2005 15:42 Sep 25, 2007 Jkt 211001 this AD and placed it in the AD docket. See the ADDRESSES section for a location to examine the regulatory evaluation. Costs of Compliance There are about 707 airplanes of the affected design in the worldwide fleet. This AD affects about 107 airplanes of U.S. registry. Depending on airplane configuration, the required actions take between 106 and 448 work hours per airplane, at an average labor rate of $80 per work hour. Required parts cost between $430 and $2,074 per airplane. Based on these figures, the estimated cost of the AD for U.S. operators is between $8,910 and $37,914 per airplane, or up to $4,056,798 for all airplanes. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, ‘‘General requirements.’’ Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We have determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866; (2) Is not a ‘‘significant rule’’ under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. We prepared a regulatory evaluation of the estimated costs to comply with PO 00000 Frm 00016 Fmt 4700 Sfmt 4700 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 1. The authority citation for part 39 continues to read as follows: I Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The Federal Aviation Administration (FAA) amends § 39.13 by adding the following new airworthiness directive (AD): I 2007–20–01 Boeing: Amendment 39–15211. Docket No. FAA–2007–28349; Directorate Identifier 2007–NM–025–AD. Effective Date (a) This AD becomes effective October 31, 2007. Affected ADs (b) None. Applicability (c) This AD applies to Boeing Model 747– 100B SUD, 747–200B, 747–200C, 747–200F, 747–300, 747–400, 747–400D, 747–400F, and 747SP series airplanes, certificated in any category; as identified in Boeing Special Attention Service Bulletin 747–57–2327, Revision 1, dated July 10, 2006; and Boeing Special Attention Service Bulletin 747–57– 2326, dated January 4, 2007. Unsafe Condition (d) This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to prevent arcing inside the fuel tanks in the event of a lightning strike or high-powered short circuit, which could result in a fuel tank explosion or 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. Change and Seal (f) Within 60 months after the effective date of this AD, do the actions required by paragraphs (f)(1) and (f)(2) of this AD. (1) Reconfigure the wire bundle clamps and seal the ends of certain fasteners inside the auxiliary fuel tank, main fuel tanks, and surge fuel tanks, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747–57– 2327, Revision 1, dated July 10, 2006. E:\FR\FM\26SER1.SGM 26SER1 Federal Register / Vol. 72, No. 186 / Wednesday, September 26, 2007 / Rules and Regulations (2) Seal the ends of certain fasteners inside the main fuel tanks, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747–57– 2326, dated January 4, 2007. DEPARTMENT OF TRANSPORTATION Alternative Methods of Compliance (AMOCs) [Docket No. FAA–2007–28619; Directorate Identifier 2007–NM–004–AD; Amendment 39–15212; AD 2007–20–02] (g)(1) The Manager, Seattle Aircraft Certification Office (ACO), 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 747–57–2327, Revision 1, dated July 10, 2006; and Boeing Special Attention Service Bulletin 747–57–2326, dated January 4, 2007; as applicable, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for a copy of this service information. You may review copies 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/ cfr/ibr-locations.html. Issued in Renton, Washington, on September 17, 2007. John Piccola, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7–18747 Filed 9–25–07; 8:45 am] BILLING CODE 4910–13–P Federal Aviation Administration 14 CFR Part 39 RIN 2120–AA64 Airworthiness Directives; Viking Air Limited Model DHC–7 Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all Viking Air Limited Model DHC–7 airplanes. This AD requires an inspection of certain SM–200 servo drive units (power servo motor and housing assemblies) for certain markings, related investigative action if necessary, and modification if necessary. This AD results from a report that some SM–200 servo drive units that were not in configuration MOD H are installed on Model DHC–7 airplanes. MOD H prevents the internal clutch fasteners from backing out. We are issuing this AD to prevent the possibility of internal clutch fasteners from backing out, which could cause an inadvertent servo engagement and consequent reduced controllability of the airplane. DATES: This AD becomes effective October 31, 2007. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of October 31, 2007. ADDRESSES: You may examine the AD docket on the Internet at https:// dms.dot.gov or in person at the U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC. Contact Viking Air Limited, 9574 Hampden Road, Sidney, British 54535 Columbia V8L 5V5, Canada, for service information identified in this AD. FOR FURTHER INFORMATION CONTACT: Ezra Sasson, Aerospace Engineer, Systems and Flight Test Branch, ANE–172, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228–7320; fax (516) 794–5531. SUPPLEMENTARY INFORMATION: Examining the Docket You may examine the AD docket on the Internet at https://dms.dot.gov or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Operations office (telephone (800) 647–5527) is located on the ground floor of the West Building at the DOT street address stated in the ADDRESSES section. Discussion The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to all Viking Air Limited Model DHC–7 airplanes. That NPRM was published in the Federal Register on July 6, 2007 (72 FR 36925). That NPRM proposed to require an inspection of certain SM–200 servo drive units (power servo motor and housing assemblies) for certain markings, related investigative action if necessary, and modification if necessary. Comments We provided the public the opportunity to participate in the development of this AD. We received no comments on the NPRM or on the determination of the cost to the public. Conclusion We have carefully reviewed the available data and determined that air safety and the public interest require adopting the AD as proposed. Costs of Compliance The following table provides the estimated costs for U.S. operators to comply with this AD. ESTIMATED COSTS Work hours Average labor rate per hour Cost per airplane Number of U.S.-registered airplanes Fleet cost Inspection ........................................................................................... rmajette on PROD1PC64 with RULES Action 1 $80 $80 21 $1,680 Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue VerDate Aug<31>2005 15:42 Sep 25, 2007 Jkt 211001 rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, PO 00000 Frm 00017 Fmt 4700 Sfmt 4700 Aviation Programs, describes in more detail the scope of the Agency’s authority. E:\FR\FM\26SER1.SGM 26SER1

Agencies

[Federal Register Volume 72, Number 186 (Wednesday, September 26, 2007)]
[Rules and Regulations]
[Pages 54533-54535]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-18747]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-28349; Directorate Identifier 2007-NM-025-AD; 
Amendment 39-15211; AD 2007-20-01]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 747-100B SUD, 747-200B, 
747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SP 
Series Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Boeing Model 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-
300, 747-400, 747-400D, 747-400F, and 747SP series airplanes. This AD 
requires reconfiguring the clamps of certain wire bundles and applying 
insulating sealant to certain fasteners inside the fuel tanks. This AD 
results from fuel system reviews conducted by the manufacturer. We are 
issuing this AD to prevent arcing inside the fuel tanks in the event of 
a lightning strike or high-powered short circuit, which could result in 
a fuel tank explosion or fire.

DATES: This AD becomes effective October 31, 2007.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the AD as of October 31, 
2007.

ADDRESSES: You may examine the AD docket on the Internet at https://
dms.dot.gov or in person at the U.S. Department of Transportation, 
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 
New Jersey Avenue, SE., Washington, DC.
    Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, 
Washington 98124-2207, for service information identified in this AD.

FOR FURTHER INFORMATION CONTACT: Sulmo Mariano, Aerospace Engineer, 
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification 
Office,

[[Page 54534]]

1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 
917-6501; fax (425) 917-6590.

SUPPLEMENTARY INFORMATION:

Examining the Docket

    You may examine the AD docket on the Internet at https://dms.dot.gov 
or in person at the Docket Operations office between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The Docket Operations 
office (telephone (800) 647-5527) is located on the ground floor of the 
West Building at the DOT street address stated in the ADDRESSES 
section.

Discussion

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 to include an AD that would apply to certain Boeing Model 
747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 
747-400F, and 747SP series airplanes. That NPRM was published in the 
Federal Register on June 5, 2007 (72 FR 30999). That NPRM proposed to 
require reconfiguring the clamps of certain wire bundles and applying 
insulating sealant to certain fasteners inside the fuel tanks.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. We have considered the single comment received.

Request To Add Information About New Clamp Design

    Boeing requests that we add information about the design of the 
replacement clamps. Boeing asserts that the second paragraph of the 
Relevant Service Information section of the NPRM does not describe how 
the new clamps protect the wire bundle. Boeing explains that the new 
clamps are of a different design and have additional protection on 
their edges. Boeing therefore requests that we revise the described 
paragraph to read ``* * * installing new, larger clamps, which contain 
additional protection against metal to bundle contact, * * *.''
    We partially agree with this request. We agree that this 
information clarifies the nature of the modification developed to 
address the unsafe condition; however, the Relevant Service Information 
section of the NPRM is not retained in the final rule. Therefore, we 
find that no change to the AD is necessary in this regard.

Conclusion

    We have carefully reviewed the available data, including the 
comment received, and determined that air safety and the public 
interest require adopting the AD as proposed.

Costs of Compliance

    There are about 707 airplanes of the affected design in the 
worldwide fleet. This AD affects about 107 airplanes of U.S. registry. 
Depending on airplane configuration, the required actions take between 
106 and 448 work hours per airplane, at an average labor rate of $80 
per work hour. Required parts cost between $430 and $2,074 per 
airplane. Based on these figures, the estimated cost of the AD for U.S. 
operators is between $8,910 and $37,914 per airplane, or up to 
$4,056,798 for all airplanes.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We have determined that this AD will not have federalism 
implications under Executive Order 13132. This AD will not have a 
substantial direct effect on the States, on the relationship between 
the national government and the States, or on the distribution of power 
and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866;
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979); and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket. See the ADDRESSES 
section for a location to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator, 
the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The Federal Aviation Administration (FAA) amends Sec.  39.13 by 
adding the following new airworthiness directive (AD):

2007-20-01 Boeing: Amendment 39-15211. Docket No. FAA-2007-28349; 
Directorate Identifier 2007-NM-025-AD.

Effective Date

    (a) This AD becomes effective October 31, 2007.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Boeing Model 747-100B SUD, 747-200B, 747-
200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SP 
series airplanes, certificated in any category; as identified in 
Boeing Special Attention Service Bulletin 747-57-2327, Revision 1, 
dated July 10, 2006; and Boeing Special Attention Service Bulletin 
747-57-2326, dated January 4, 2007.

Unsafe Condition

    (d) This AD results from fuel system reviews conducted by the 
manufacturer. We are issuing this AD to prevent arcing inside the 
fuel tanks in the event of a lightning strike or high-powered short 
circuit, which could result in a fuel tank explosion or 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.

Change and Seal

    (f) Within 60 months after the effective date of this AD, do the 
actions required by paragraphs (f)(1) and (f)(2) of this AD.
    (1) Reconfigure the wire bundle clamps and seal the ends of 
certain fasteners inside the auxiliary fuel tank, main fuel tanks, 
and surge fuel tanks, in accordance with the Accomplishment 
Instructions of Boeing Special Attention Service Bulletin 747-57-
2327, Revision 1, dated July 10, 2006.

[[Page 54535]]

    (2) Seal the ends of certain fasteners inside the main fuel 
tanks, in accordance with the Accomplishment Instructions of Boeing 
Special Attention Service Bulletin 747-57-2326, dated January 4, 
2007.

Alternative Methods of Compliance (AMOCs)

    (g)(1) The Manager, Seattle Aircraft Certification Office (ACO), 
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 747-
57-2327, Revision 1, dated July 10, 2006; and Boeing Special 
Attention Service Bulletin 747-57-2326, dated January 4, 2007; as 
applicable, to perform the actions that are required by this AD, 
unless the AD specifies otherwise. The Director of the Federal 
Register approved the incorporation by reference of these documents 
in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Boeing 
Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207, 
for a copy of this service information. You may review copies 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/cfr/ibr-locations.html.

    Issued in Renton, Washington, on September 17, 2007.
John Piccola,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service. 7
 [FR Doc. E7-18747 Filed 9-25-07; 8:45 am]
BILLING CODE 4910-13-P
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