Airworthiness Directives; Boeing Model 747-400 and 747-400D Series Airplanes, 46072-46074 [05-15586]

Download as PDF 46072 Federal Register / Vol. 70, No. 152 / Tuesday, August 9, 2005 / Rules and Regulations (1) The Director of the Federal Register approved the incorporation by reference of Bombardier Service Bulletin SB 23/24/25– 28–7, Revision 2, dated May 9, 2001; and Bombardier Service Bulletin SB 35/36–28– 14, Revision 2, dated May 9, 2001; in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. (2) On December 27, 1995 (60 FR 63617, December 12, 1995), the Director of the Federal Register approved the incorporation by reference of Learjet Service Bulletin SB 23/24/25–28–2, dated October 6, 1995; and Learjet Service Bulletin SB 35/36–28–10, dated October 6, 1995. (3) Contact Learjet, Inc., One Learjet Way, Wichita, Kansas 67209–2942, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Room PL–401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741– 6030, or go to http://www.archives.gov/ federal_register/code_of_federal_regulations/ ibr_locations.html. TABLE 2.—MATERIAL INCORPORATED BY REFERENCE Service bulletin Revision level Bombardier Service Bulletin SB 23/24/25–28–7 ................................................................................. Bombardier Service Bulletin SB 35/36–28–14 .................................................................................... Learjet Service Bulletin SB 23/24/25–28–2 ........................................................................................ Learjet Service Bulletin SB 35/36–28–10 ........................................................................................... 2 ............................... 2 ............................... Original .................... Original .................... Issued in Renton, Washington, on July 29, 2005. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–15585 Filed 8–8–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2005–21088; Directorate Identifier 2004–NM–267–AD; Amendment 39–14215; AD 2005–16–10] RIN 2120–AA64 Airworthiness Directives; Boeing Model 747–400 and 747–400D 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 747–400 and 747–400D series airplanes. This AD requires an inspection for corrosion and cracks of the station 980 upper deck floor beam, and repair and related investigative actions if necessary. This AD results from reports of corrosion under the cart lift threshold at the station 980 upper deck floor beam. We are issuing this AD to detect and correct such corrosion, which could result in a cracked or broken floor beam, extensive damage to adjacent structure, and possible rapid decompression of the airplane. DATES: Effective September 13, 2005. The Director of the Federal Register approved the incorporation by reference VerDate jul<14>2003 15:06 Aug 08, 2005 Jkt 205001 of a certain publication listed in the AD as of September 13, 2005. ADDRESSES: You may examine the AD docket on the Internet at http:// dms.dot.gov or in person at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Nassif Building, Room PL–401, 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: Ivan Li, Aerospace Engineer, Airframe Branch, ANM–120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055–4056; telephone (425) 917–6437; fax (425) 917–6590. SUPPLEMENTARY INFORMATION: Examining the Docket You may examine the AD docket on the Internet at http://dms.dot.gov or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647–5227) is located on the plaza level of the Nassif Building at the 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 747–400 and 747–400D series airplanes. That NPRM was published in the Federal Register on May 3, 2005 (70 FR 22826). That NPRM proposed to require an inspection for corrosion and cracks of the station 980 upper deck floor beam, and repair and related investigative actions if necessary. PO 00000 Frm 00008 Fmt 4700 Sfmt 4700 Date May 9, 2001. May 9, 2001. October 6, 1995. October 6, 1995. Comments We provided the public the opportunity to participate in the development of this AD. We have considered the comment that has been received on the NPRM. Support for the Proposed AD The commenter supports the NPRM. Explanation of Change to Paragraph (f)(2) We have revised paragraph (f)(2) of this AD to correct a typographical error that resulted in an incorrect paragraph reference. Clarification of Alternative Methods of Compliance (AMOCs) We have revised paragraph (h)(2) of this AD to clarify the AMOC requirements. Clarification of Compliance Time We have made a minor editorial change to clarify the compliance time in paragraph (f)(1) of this AD. 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 with the changes described previously. We have determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD. Costs of Compliance There are about 363 airplanes of the affected design in the worldwide fleet. The following table provides the estimated costs for U.S. operators to comply with this AD. E:\FR\FM\09AUR1.SGM 09AUR1 Federal Register / Vol. 70, No. 152 / Tuesday, August 9, 2005 / Rules and Regulations 46073 ESTIMATED COSTS Action Work hours Average labor rate per hour Parts Cost per airplane Number of U.S.-registered airplanes Fleet cost Inspection ............................................................................ 3 $65 None required ..... $195 46 $8,970 Adoption of the Amendment 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 List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. 15:06 Aug 08, 2005 Repair Affected ADs 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. VerDate jul<14>2003 floor beam, in accordance with Boeing Alert Service Bulletin 747–53A2503, I Accordingly, under the authority dated November 11, 2004. delegated to me by the Administrator, (1) Inspect within 120 months since the FAA amends 14 CFR part 39 as the date of issuance of the original follows: standard Airworthiness Certificate or the date of issuance of the original PART 39—AIRWORTHINESS Export Certificate of Airworthiness; or DIRECTIVES (2) Inspect at the time specified in I 1. The authority citation for part 39 paragraph (f)(2)(i), (f)(2)(ii), or (f)(2)(iii) continues to read as follows: of this AD for the applicable airplane group as identified in the service Authority: 49 U.S.C. 106(g), 40113, 44701. bulletin. § 39.13 [Amended] (i) For Group 1 airplanes: Within 18 months after the effective date of this I 2. The Federal Aviation Administration (FAA) amends § 39.13 by AD. (ii) For Group 2 airplanes: Within 36 adding the following new airworthiness months after the effective date of this directive (AD): AD. 2005–16–10 Boeing: Amendment 39–14215. (iii) For Group 3 airplanes: Within Docket No. FAA–2005–21088; 120 months after the airplane has been Directorate Identifier 2004–NM–267–AD. modified in accordance with Boeing Effective Date Service Bulletin 747–25–3107, or within 36 months after the effective date of this (a) This AD becomes effective AD, whichever occurs later. September 13, 2005. Jkt 205001 (b) None. Applicability (c) This AD applies to Boeing Model 747–400 and 747–400D series airplanes, certificated in any category, as listed in Boeing Alert Service Bulletin 747– 53A2503, dated November 11, 2004. Unsafe Condition (d) This AD was prompted by reports of corrosion under the cart lift threshold at the station 980 upper deck floor beam. We are issuing this AD to detect and correct such corrosion, which could result in a cracked or broken floor beam, extensive damage to adjacent structure, and possible rapid decompression of the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Inspection (f) At the later of the times specified in paragraphs (f)(1) and (f)(2) of this AD: Do a detailed inspection for corrosion and cracks of the station 980 upper deck PO 00000 Frm 00009 Fmt 4700 Sfmt 4700 (g) If any cracking or corrosion is found during any inspection required by this AD, do all related investigative and corrective actions before further flight, in accordance with Boeing Alert Service Bulletin 747–53A2503, dated November 11, 2004. If the service bulletin specifies to contact Boeing for appropriate action, repair before further flight according to a method approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA; or according to data meeting the certification basis of the airplane approved by an Authorized Representative for the Boeing Delegation Option Authorization (DOA) Organization who has been authorized by the Manager, Seattle ACO, to make those findings. For a repair method to be approved, the approval must specifically reference this AD. Alternative Methods of Compliance (AMOCs) (h)(1) The Manager, Seattle 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) An AMOC that provides an acceptable level of safety may be used for any repair required by this AD, if it E:\FR\FM\09AUR1.SGM 09AUR1 46074 Federal Register / Vol. 70, No. 152 / Tuesday, August 9, 2005 / Rules and Regulations is approved by an Authorized Representative for the Boeing DOA Organization who has been authorized by the Manager, Seattle ACO, to make those findings. For a repair method to be approved, the repair must meet the certification basis of the airplane, and the approval must specifically refer to this AD. Material Incorporated by Reference (i) You must use Boeing Alert Service Bulletin 747–53A2503, dated November 11, 2004, 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 this document 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 Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Room PL–401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741–6030, or go to http://www.archives.gov/ federal_register/code_of_ federal_regulations/ibr_locations.html. Issued in Renton, Washington, on July 29, 2005. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–15586 Filed 8–8–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration and corrective actions if necessary. This AD results from reports of contamination of the fueling float switch by moisture or fuel, and chafing of the float switch wiring against the fuel tank conduit. We are issuing this AD to prevent such contamination and chafing, which could present an ignition source inside the fuel tank that could cause a fire or explosion. Effective September 13, 2005. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of September 13, 2005. DATES: You may examine the AD docket on the Internet at http:// dms.dot.gov or in person at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Nassif Building, Room PL–401, Washington, DC. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for service information identified in this AD. ADDRESSES: FOR FURTHER INFORMATION CONTACT: Sulmo Mariano, Aerospace Engineer, Propulsion Branch, ANM–140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055–4056; telephone (425) 917–6501; fax (425) 917–6590. SUPPLEMENTARY INFORMATION: Examining the Docket You may examine the AD docket on the Internet at http://dms.dot.gov or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647–5227) is located on the plaza level of the Nassif Building at the street address stated in the ADDRESSES section. 14 CFR Part 39 Discussion [Docket No. FAA–2005–20799; Directorate Identifier 2004–NM–264–AD; Amendment 39–14212; AD 2005–16–07] The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to all Boeing Model 727 airplanes. That NPRM was published in the Federal Register on April 4, 2005 (70 FR 16979). That NPRM proposed to require determining whether any float switches are installed in the fuel tanks, and corrective actions if necessary. RIN 2120–AA64 Airworthiness Directives; Boeing Model 727 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 Boeing Model 727 airplanes. This AD requires determining whether any float switches are installed in the fuel tanks, VerDate jul<14>2003 15:06 Aug 08, 2005 Jkt 205001 Comments We provided the public the opportunity to participate in the development of this AD. We have considered the comments that have been received on the NPRM. PO 00000 Frm 00010 Fmt 4700 Sfmt 4700 Support for Proposed AD One commenter, the airplane manufacturer, concurs with the content of the proposed AD. Request To Change Applicability One commenter asks that the applicability specified in the proposed AD be limited to Boeing Model 727 airplanes that have float switches installed. The commenter states that the effectivity of the proposed AD will encompass all Boeing Model 727–100 airplanes operated by them, even though Model 727–100 airplanes are not included in the effectivity specified in the service bulletin referenced in the proposed AD. The commenter adds that the effectivity in the referenced service bulletin is limited to airplanes with factory installed auxiliary fuel tanks; the design for Model 727–100 airplanes does not include float switches in the main fuel tanks because those airplanes utilize the Volumetric Top-Off system instead. The commenter realizes that we are concerned that the effectivity of the referenced service bulletin may not encompass all possible scenarios involving the subject float switches, as stated in the Supplementary Information section of the proposed AD. In consideration of this concern, the commenter notes that the effectivity of the proposed AD can be reduced to include only airplanes where the design, as delivered or modified, utilizes float switches in the airplane fuel tanks. The commenter adds that, the requested change has no effect on safety, but does remove the burden of showing compliance to a known nonapplicable configuration. We do not agree with the commenter. The planning information specified in the referenced service bulletin identifies only Boeing Model 727–100 airplanes delivered with two auxiliary fuel tanks installed. However, the effectivity specified in the service bulletin identifies all Boeing Model 727–100 and –200 airplanes with active Boeing fueling float switch shutoff systems installed. We point out that the subject of this AD is the float switch itself— regardless of the airplane model on which it is installed. To help operators determine if a particular airplane is subject to this AD, we have included all airplane models on which the float switch may be installed in the applicability of this AD. However, operators must determine if the float switch is installed on their airplanes. As specified in the AD, this determination can be made by a review of airplane maintenance records, instead of an inspection of the fuel tanks; such a E:\FR\FM\09AUR1.SGM 09AUR1

Agencies

[Federal Register Volume 70, Number 152 (Tuesday, August 9, 2005)]
[Rules and Regulations]
[Pages 46072-46074]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-15586]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2005-21088; Directorate Identifier 2004-NM-267-AD; 
Amendment 39-14215; AD 2005-16-10]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 747-400 and 747-400D 
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 747-400 and 747-400D series airplanes. This AD 
requires an inspection for corrosion and cracks of the station 980 
upper deck floor beam, and repair and related investigative actions if 
necessary. This AD results from reports of corrosion under the cart 
lift threshold at the station 980 upper deck floor beam. We are issuing 
this AD to detect and correct such corrosion, which could result in a 
cracked or broken floor beam, extensive damage to adjacent structure, 
and possible rapid decompression of the airplane.

DATES: Effective September 13, 2005.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in the AD as of September 13, 
2005.

ADDRESSES: You may examine the AD docket on the Internet at http://
dms.dot.gov or in person at the Docket Management Facility, U.S. 
Department of Transportation, 400 Seventh Street SW., Nassif Building, 
Room PL-401, 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: Ivan Li, Aerospace Engineer, Airframe 
Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601 Lind 
Avenue, SW., Renton, Washington 98055-4056; telephone (425) 917-6437; 
fax (425) 917-6590.

SUPPLEMENTARY INFORMATION:

Examining the Docket

    You may examine the AD docket on the Internet at http://dms.dot.gov 
or in person at the Docket Management Facility office between 9 a.m. 
and 5 p.m., Monday through Friday, except Federal holidays. The Docket 
Management Facility office (telephone (800) 647-5227) is located on the 
plaza level of the Nassif Building at the 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 
747-400 and 747-400D series airplanes. That NPRM was published in the 
Federal Register on May 3, 2005 (70 FR 22826). That NPRM proposed to 
require an inspection for corrosion and cracks of the station 980 upper 
deck floor beam, and repair and related investigative actions if 
necessary.

Comments

    We provided the public the opportunity to participate in the 
development of this AD. We have considered the comment that has been 
received on the NPRM.

Support for the Proposed AD

    The commenter supports the NPRM.

Explanation of Change to Paragraph (f)(2)

    We have revised paragraph (f)(2) of this AD to correct a 
typographical error that resulted in an incorrect paragraph reference.

Clarification of Alternative Methods of Compliance (AMOCs)

    We have revised paragraph (h)(2) of this AD to clarify the AMOC 
requirements.

Clarification of Compliance Time

    We have made a minor editorial change to clarify the compliance 
time in paragraph (f)(1) of this AD.

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 with the changes described previously. 
We have determined that these changes will neither increase the 
economic burden on any operator nor increase the scope of the AD.

Costs of Compliance

    There are about 363 airplanes of the affected design in the 
worldwide fleet. The following table provides the estimated costs for 
U.S. operators to comply with this AD.

[[Page 46073]]



                                                                     Estimated Costs
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                 Number of
                                                               Average                                               Cost per      U.S.-
                     Action                      Work hours   labor rate                   Parts                     airplane    registered   Fleet cost
                                                               per hour                                                          airplanes
--------------------------------------------------------------------------------------------------------------------------------------------------------
Inspection.....................................          3          $65   None required..........................        $195           46       $8,970
--------------------------------------------------------------------------------------------------------------------------------------------------------

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):

2005-16-10 Boeing: Amendment 39-14215. Docket No. FAA-2005-21088; 
Directorate Identifier 2004-NM-267-AD.

Effective Date

    (a) This AD becomes effective September 13, 2005.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Boeing Model 747-400 and 747-400D series 
airplanes, certificated in any category, as listed in Boeing Alert 
Service Bulletin 747-53A2503, dated November 11, 2004.

Unsafe Condition

    (d) This AD was prompted by reports of corrosion under the cart 
lift threshold at the station 980 upper deck floor beam. We are issuing 
this AD to detect and correct such corrosion, which could result in a 
cracked or broken floor beam, extensive damage to adjacent structure, 
and possible rapid decompression of the airplane.

Compliance

    (e) You are responsible for having the actions required by this AD 
performed within the compliance times specified, unless the actions 
have already been done.

Inspection

    (f) At the later of the times specified in paragraphs (f)(1) and 
(f)(2) of this AD: Do a detailed inspection for corrosion and cracks of 
the station 980 upper deck floor beam, in accordance with Boeing Alert 
Service Bulletin 747-53A2503, dated November 11, 2004.
    (1) Inspect within 120 months since the date of issuance of the 
original standard Airworthiness Certificate or the date of issuance of 
the original Export Certificate of Airworthiness; or
    (2) Inspect at the time specified in paragraph (f)(2)(i), 
(f)(2)(ii), or (f)(2)(iii) of this AD for the applicable airplane group 
as identified in the service bulletin.
    (i) For Group 1 airplanes: Within 18 months after the effective 
date of this AD.
    (ii) For Group 2 airplanes: Within 36 months after the effective 
date of this AD.
    (iii) For Group 3 airplanes: Within 120 months after the airplane 
has been modified in accordance with Boeing Service Bulletin 747-25-
3107, or within 36 months after the effective date of this AD, 
whichever occurs later.

Repair

    (g) If any cracking or corrosion is found during any inspection 
required by this AD, do all related investigative and corrective 
actions before further flight, in accordance with Boeing Alert Service 
Bulletin 747-53A2503, dated November 11, 2004. If the service bulletin 
specifies to contact Boeing for appropriate action, repair before 
further flight according to a method approved by the Manager, Seattle 
Aircraft Certification Office (ACO), FAA; or according to data meeting 
the certification basis of the airplane approved by an Authorized 
Representative for the Boeing Delegation Option Authorization (DOA) 
Organization who has been authorized by the Manager, Seattle ACO, to 
make those findings. For a repair method to be approved, the approval 
must specifically reference this AD.

Alternative Methods of Compliance (AMOCs)

    (h)(1) The Manager, Seattle 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) An AMOC that provides an acceptable level of safety may be used 
for any repair required by this AD, if it

[[Page 46074]]

is approved by an Authorized Representative for the Boeing DOA 
Organization who has been authorized by the Manager, Seattle ACO, to 
make those findings. For a repair method to be approved, the repair 
must meet the certification basis of the airplane, and the approval 
must specifically refer to this AD.

Material Incorporated by Reference

    (i) You must use Boeing Alert Service Bulletin 747-53A2503, dated 
November 11, 2004, 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 this document 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 Docket 
Management Facility, U.S. Department of Transportation, 400 Seventh 
Street SW., Room PL-401, Nassif Building, Washington, DC; on the 
Internet at http://dms.dot.gov; or at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at the NARA, call (202) 741-6030, or go to http://
www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html.

    Issued in Renton, Washington, on July 29, 2005.
Kevin M. Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-15586 Filed 8-8-05; 8:45 am]
BILLING CODE 4910-13-P