Airworthiness Directives; The Boeing Company Airplanes, 22686-22689 [2012-9177]

Download as PDF 22686 Proposed Rules Federal Register Vol. 77, No. 74 Tuesday, April 17, 2012 This section of the FEDERAL REGISTER contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules. FEDERAL RESERVE SYSTEM 12 CFR Part 225 [Regulation Y; Docket No. R–1405] RIN 7100–AD64 Definition of ‘‘Predominantly Engaged in Financial Activities’’; Correction Board of Governors of the Federal Reserve System (‘‘Board’’). ACTION: Supplemental notice of proposed rulemaking and request for comment; correction. AGENCY: On April 10, 2012, the Board published in the Federal Register a supplemental notice of proposed rulemaking and request for comment that would establish the criteria for determining whether a company is ‘‘predominantly engaged in financial activities’’ for purposes of Title I of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. That Federal Register notice omitted the instructions for submitting comments. This document corrects that omission. DATES: The comment period closing date for the proposed rule published April 10, 2012, at 77 FR 21494 remains May 25, 2012. ADDRESSES: You may submit comments on the proposed rule published April 10, 2012, at 77 FR 21494, identified by Docket No. 1405 and RIN 7100–AD64 by any of the following methods: • Agency Web Site: http:// www.federalreserve.gov. Follow the instructions for submitting comments at http://www.federalreserve.gov/apps/ foia/proposedregs.aspx. • Federal eRulemaking Portal: http:// www.regulations.gov. Follow the instructions for submitting comments. • Email: regs.comments@ federalreserve.gov. Include docket and RIN numbers in the subject line of the message. • Fax: (202) 452–3819 or (202) 452– 3102. • Mail: Jennifer J. Johnson, Secretary, Board of Governors of the Federal Reserve System, 20th Street and wreier-aviles on DSK5TPTVN1PROD with PROPOSALS SUMMARY: VerDate Mar<15>2010 14:21 Apr 16, 2012 Jkt 226001 Constitution Avenue NW., Washington, DC 20551. All public comments are available from the Board’s Web site at http:// www.federalreserve.gov/apps/foia/ proposedregs.aspx as submitted, unless modified for technical reasons. Accordingly, your comments will not be edited to remove any identifying or contact information. Public comments may also be viewed electronically or in paper form in Room MP–500 of the Board’s Martin Building (20th and C Streets NW.) between 9 a.m. and 5 p.m. on weekdays. FOR FURTHER INFORMATION CONTACT: Laurie S. Schaffer, Associate General Counsel, (202) 452–2272, Paige E. Pidano, Senior Attorney, (202) 452– 2803 or Christine E. Graham, Senior Attorney, (202) 452–3005, Legal Division; Mark Van Der Weide, Senior Associate Director, (202) 452–2263, Division of Banking Supervision and Regulation, Board of Governors of the Federal Reserve System, 20th Street and Constitution Avenue NW., Washington, DC 20551. Users of Telecommunication Device for the Deaf (TDD) only, call (202) 263–4869. On April 10, 2012, the Board published in the Federal Register a supplemental notice of proposed rulemaking and request for comment that would establish the criteria for determining whether a company is ‘‘predominantly engaged in financial activities’’ for purposes of Title I of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. That Federal Register notice omitted the instructions for submitting comments. This document corrects that omission. SUPPLEMENTARY INFORMATION: By order of the Board of Governors of the Federal Reserve System, April 12, 2012. Jennifer J. Johnson, Secretary of the Board. [FR Doc. 2012–9210 Filed 4–16–12; 8:45 am] BILLING CODE 6210–01–P PO 00000 Frm 00001 Fmt 4702 Sfmt 4702 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2012–0336; Directorate Identifier 2011–NM–213–AD] RIN 2120–AA64 Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737–500 series airplanes. This proposed AD was prompted by reports of chem-mill step cracking on the aft lower lobe fuselage skins. This proposed AD would require inspections of the fuselage skin at the chem-mill steps, and repair if necessary. We are proposing this AD to detect and correct cracking on the aft lower lobe fuselage skins, which could result in decompression of the airplane. DATES: We must receive comments on this proposed AD by June 1, 2012. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this proposed AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H–65, Seattle, Washington 98124– 2207; telephone 206–544–5000, extension 1; fax 206–766–5680; email me.boecom@boeing.com; Internet https://www.myboeingfleet.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. SUMMARY: E:\FR\FM\17APP1.SGM 17APP1 Federal Register / Vol. 77, No. 74 / Tuesday, April 17, 2012 / Proposed Rules For information on the availability of this material at the FAA, call 425–227– 1221. Examining the AD Docket You may examine the AD docket on the Internet at http:// www.regulations.gov; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (phone: 800–647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Wayne Lockett, Aerospace Engineer, Airframe Branch, ANM–120S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue SW., Renton, Washington 98057–3356; phone: 425– 917–6447; fax: 425–917–6590; email: wayne.lockett@faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA– 2012–0336; Directorate Identifier 2011– NM–213–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments. We will post all comments we receive, without change, to http:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Discussion More than 300 incidents of skin chem-mill cracks on 26 airplanes have been reported from body station (STA) 727 to 1016, and from stringer S–14 to S–25 (left and right sides). The affected airplanes had accumulated between 29,808 and 53,454 total flight cycles. Most of the skin cracks were found aft of STA 747 on the left side. Several of the reported cracks occurred in multiple adjacent bays. On the existing skin panel assembly, the doubler is chemmilled to the skin. At these skin panel locations on the airplanes, the loads could cause a condition where skin cracks could form along the longitudinal edges of the doubler. This condition, if not corrected, could result in decompression of the airplane. Relevant Service Information We reviewed Boeing Special Attention Service Bulletin 737–53– 1315, dated July 29, 2011. For information on the procedures and compliance times, see this service information at http:// www.regulations.gov by searching for Docket No. FAA–2012–0336. ‘‘Related investigative actions’’ and ‘‘corrective actions’’ are those actions specified in the service information that are necessary to address the identified unsafe condition. FAA’s Determination We are proposing this AD because we evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. Proposed AD Requirements This proposed AD would require various repetitive inspections for cracking in the fuselage skin at the chem-mill steps. For airplanes on which cracking is found, this proposed AD would require doing one of the following: 22687 • A time-limited repair, followed by related investigative actions (including a general visual inspection for loose or missing fasteners; an internal detailed inspection and a high frequency eddy current (HFEC) inspection for disbonding and cracks of the bonded doubler); corrective actions if necessary (i.e., replacing any loose or missing fastener, and contacting Boeing for repair instructions and doing the repair); and making the time-limited repair permanent; or • A permanent repair, including a detailed inspection of the bonded doubler for disbonding, and an HFEC inspection for cracks in the bonded doubler; and repair of any cracks and disbonding. Accomplishment of the permanent repair would terminate the repetitive inspections required by this proposed AD for the area(s) of the repair only. Difference Between the Proposed AD and the Service Information Boeing Special Attention Service Bulletin 737–53–1315, dated July 29, 2011, specifies to contact the manufacturer for instructions on how to repair certain conditions, but this proposed AD would require repairing those conditions in one of the following ways: • In accordance with a method that we approve; or • Using data that meet the certification basis of the airplane, and that have been approved by the Boeing Commercial Airplanes Organization Designation Authorization (ODA) whom we have authorized to make those findings. Costs of Compliance We estimate that this proposed AD affects 91 airplanes of U.S. registry. We estimate the following costs to comply with this proposed AD: ESTIMATED COSTS wreier-aviles on DSK5TPTVN1PROD with PROPOSALS Action Labor cost Inspections ..................... 23 work-hours × $85 per hour = $1,955 per inspection cycle. We estimate the following costs to do any necessary corrective actions that would be required based on the results VerDate Mar<15>2010 14:21 Apr 16, 2012 Jkt 226001 Cost per product Parts cost $0 $1,955 per inspection cycle. of the proposed inspection. We have no way of determining the number of PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 Cost on U.S. operators $177,905 per inspection cycle. aircraft that might need these corrective actions: E:\FR\FM\17APP1.SGM 17APP1 22688 Federal Register / Vol. 77, No. 74 / Tuesday, April 17, 2012 / Proposed Rules ON-CONDITION COSTS Action Labor cost Inspection ...................................... Repair ............................................ 2 work-hours × $85 per hour = $170 .................................................. 7 work-hours × $85 per hour = $595 .................................................. 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. wreier-aviles on DSK5TPTVN1PROD with PROPOSALS Regulatory Findings We determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify this proposed regulation: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Is not a ‘‘significant rule’’ under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska, and (4) 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. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, VerDate Mar<15>2010 14:21 Apr 16, 2012 Jkt 226001 Parts cost the FAA proposes to amend 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): The Boeing Company: Docket No. FAA– 2012–0336; Directorate Identifier 2011– NM–213–AD. (a) Comments Due Date We must receive comments by June 1, 2012. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 737–500 series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 737–53– 1315, dated July 29, 2011. (d) Subject Joint Aircraft System Component (JASC)/ Air Transport Association (ATA) of America Code 53, Fuselage. Cost per product $0 $0 $170 $595 Boeing Special Attention Service Bulletin 737–53–1315, dated July 29, 2011. (h) Repair If any crack is found during any inspection required by paragraph (g) of this AD: At the applicable times specified in paragraph 1.E., ‘‘Compliance,’’ of Boeing Special Attention Service Bulletin 737–53–1315, dated July 29, 2011, do all the actions specified in either paragraph (h)(1) or (h)(2) of this AD. (1) Do a time-limited repair; followed by applicable related investigative actions, corrective actions, and making the timelimited repair permanent; in accordance with Boeing Special Attention Service Bulletin 737–53–1315, dated July 29, 2011, except as required by paragraph (i)(2) of this AD. (2) Do a permanent repair, including a detailed inspection of the bonded doubler for disbonding and a high frequency eddy current inspection for cracks of the bonded doubler, in accordance with Boeing Special Attention Service Bulletin 737–53–1315, dated July 29, 2011. Repair any cracks and disbonding before further flight, in accordance with Boeing Special Attention Service Bulletin 737–53–1315, dated July 29, 2011, except as required by paragraph (i)(2) of this AD. Accomplishment of the permanent repair terminates the repetitive inspections required by this AD for the area(s) of the repair only. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (i) Exceptions to Service Bulletin Specifications The exceptions specified in paragraphs (i)(1) and (i)(2) of this AD apply to this AD. (1) Where Boeing Special Attention Service Bulletin 737–53–1315, dated July 29, 2011, specifies a compliance time after the date on this service bulletin, this AD requires compliance within the specified compliance time after the effective date of this AD. (2) Where Boeing Special Attention Service Bulletin 737–53–1315, dated July 29, 2011, specifies to contact Boeing for repair instructions: Before further flight, repair using a method approved in accordance with the procedures specified in paragraph (j) of this AD. (g) Inspection At the applicable time specified in paragraph 1.E., ‘‘Compliance,’’ of Boeing Special Attention Service Bulletin 737–53– 1315, dated July 29, 2011, except as required by paragraph (i)(1) of this AD: Do an external detailed inspection; and, as applicable, do an external or internal subsurface eddy current, magneto optic imager, or C-scan inspection; to detect cracks in the fuselage skin at the chem-mill steps; in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737–53– 1315, dated July 29, 2011. Repeat the inspections thereafter at the applicable times specified in paragraph 1.E., ‘‘Compliance,’’ of (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, Seattle Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ACO, it may be emailed to 9-ANM-Seattle-ACO-AMOCRequests@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager (e) Unsafe Condition This AD was prompted by reports of chemmill step cracking on the aft lower lobe fuselage skins. We are issuing this AD to detect and correct step cracking on the aft lower lobe fuselage skins, which could result in decompression of the airplane. PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 E:\FR\FM\17APP1.SGM 17APP1 Federal Register / Vol. 77, No. 74 / Tuesday, April 17, 2012 / Proposed Rules of the local flight standards district office/ certificate holding district office. (3) An AMOC that provides an acceptable level of safety may be used for any repair required by this AD if it is approved by the Boeing Commercial Airplanes Organization Designation Authorization (ODA) that 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. Authorization Validated End-User (VEU) to send written notice of such shipments to the recipient VEU. BIS further proposes to amend the EAR to clarify that when items subject to itemspecific conditions under Authorization VEU no longer require a license for export or reexport or become eligible for shipment under a license exception, as set forth in the EAR, VEUs are no longer bound by the conditions associated with such items. (k) Related Information DATES: Comments must be received by (1) For more information about this AD, contact Wayne Lockett, Aerospace Engineer, no later than June 18, 2012. Airframe Branch, ANM–120S, FAA, Seattle ADDRESSES: Comments on this rule may Aircraft Certification Office (ACO), 1601 Lind be submitted to the Federal rulemaking Avenue SW., Renton, Washington 98057– portal (http://www.regulations.gov). The 3356; phone: 425–917–6447; fax: 425–917– regulations.gov ID for this rule is: BIS– 6590; email: wayne.lockett@faa.gov. 2012–0005. Comments may also be (2) For service information identified in submitted via email to this AD, contact Boeing Commercial Airplanes, Attention: Data & Services publiccomments@bis.doc.gov or on Management, P.O. Box 3707, MC 2H–65, paper to Regulatory Policy Division, Seattle, Washington 98124–2207; telephone Bureau of Industry and Security, Room 206–544–5000, extension 1; fax 206–766– 2099B, U.S. Department of Commerce, 5680; email me.boecom@boeing.com; Internet 14th St. and Pennsylvania Ave. NW., https://www.myboeingfleet.com. You may Washington, DC 20230. Please refer to also review the referenced service RIN 0694–AF19 in all comments and in information in the docket at the subject line of email comments. www.regulations.gov (refer to Docket No. FAA–2012–0336). You may review copies of FOR FURTHER INFORMATION CONTACT: the referenced service information at the Karen H. Nies-Vogel, Chair, End-User FAA, Transport Airplane Directorate, 1601 Review Committee, Bureau of Industry Lind Avenue SW., Renton, Washington and Security, U.S. Department of 98057–3356. For information on the Commerce, 14th St. and Pennsylvania availability of this material at the FAA, call Avenue NW., Washington, DC 20230; by 425–227–1221. telephone: (202) 482–5991, fax: (202) Issued in Renton, Washington, on April 5, 482–3911, or email: ERC@bis.doc.gov. 2012. SUPPLEMENTARY INFORMATION: Ali Bahrami, Background Manager, Transport Airplane Directorate, Aircraft Certification Service. Authorization Validated End-User (VEU) [FR Doc. 2012–9177 Filed 4–16–12; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF COMMERCE Bureau of Industry and Security 15 CFR Part 748 [Docket No. 110331231–1608–02] RIN 0694–AF19 wreier-aviles on DSK5TPTVN1PROD with PROPOSALS Revisions to Authorization Validated End-User Provisions: Requirement for Notice of Export, Reexport, or Transfer (In-Country) and Clarification Regarding Termination of Conditions on VEU Authorizations Bureau of Industry and Security, Commerce. ACTION: Proposed rule. AGENCY: In this rule, the Bureau of Industry and Security (BIS) proposes to amend the Export Administration Regulations (EAR) by adding a requirement for persons shipping under SUMMARY: VerDate Mar<15>2010 14:21 Apr 16, 2012 Jkt 226001 BIS amended the EAR in a final rule on June 19, 2007 (72 FR 33646), to create a new authorization for ‘‘validated end-users’’ (VEUs) located in eligible destinations to which eligible items may be exported, reexported, or transferred (in-country) under a general authorization instead of a license. VEUs may obtain eligible items that are on the Commerce Control List, which are identified in Supplement No. 7 to part 748 of the EAR, without having to wait for their suppliers to obtain export licenses from BIS. Eligible items may include commodities, software, and technology, except those controlled for missile technology or crime control reasons. The VEUs listed in Supplement No. 7 to part 748 of the EAR were reviewed and approved by the U.S. Government in accordance with the provisions of section 748.15 and Supplement Nos. 8 and 9 to part 748 of the EAR. The EndUser Review Committee (ERC), composed of representatives from the PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 22689 Departments of State, Defense, Energy, and Commerce, and other agencies, as appropriate, is responsible for administering the VEU program. A unanimous vote by the ERC is required to authorize VEU status for a candidate or to add any eligible items to an existing authorization. A majority vote of the ERC is required to remove VEU authorization or to remove eligible items from an existing authorization. In addition to U.S. exporters, Authorization VEU may be used in accordance with the provisions of the EAR by foreign reexporters and by persons transferring in-country. VEUs are subject to regular reviews by the U.S. Government to ensure that items shipped under Authorization VEU are used for civilian purposes. In addition, VEUs are subject to on-site reviews as warranted. As of the date of this rule, pursuant to section 748.15(b) of the EAR, VEUs are located in the People’s Republic of China (PRC) and India. Amendments to Section 748.15 of the EAR Prior Notification Requirement Through this rule, BIS proposes amending the EAR by adding paragraph (g)—Notification requirement—to section 748.15—Authorization Validated End-User. The new paragraph (g) would require persons exporting, reexporting, or transferring (in-country) under Authorization VEU to send written notification to the recipient VEU with details about their shipment within seven days of the shipment. Details that would be required in the notification include a list of the contents of the shipment and the quantity of such items that have been or will be shipped to the respective VEUs under Authorization VEU, as well as a list of the applicable Export Control Classification Numbers (ECCNs) for items included in the shipment under Authorization VEU. The purpose of this proposed new requirement is to enhance the ability of VEUs to comply with the requirements of the VEU program. This amendment to the EAR is not the result of noncompliance with VEU requirements by existing VEUs. Rather, BIS proposes making this change at the request of VEUs. Some VEUs have informed BIS that compliance is challenging when they receive items under multiple authorizations, but are unable to determine which authorization is used for each shipment, and thus determine which set of conditions applies to the items received in each shipment. Because items may be shipped to VEUs under different forms of authorization E:\FR\FM\17APP1.SGM 17APP1

Agencies

[Federal Register Volume 77, Number 74 (Tuesday, April 17, 2012)]
[Proposed Rules]
[Pages 22686-22689]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-9177]


=======================================================================
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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2012-0336; Directorate Identifier 2011-NM-213-AD]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
certain The Boeing Company Model 737-500 series airplanes. This 
proposed AD was prompted by reports of chem-mill step cracking on the 
aft lower lobe fuselage skins. This proposed AD would require 
inspections of the fuselage skin at the chem-mill steps, and repair if 
necessary. We are proposing this AD to detect and correct cracking on 
the aft lower lobe fuselage skins, which could result in decompression 
of the airplane.

DATES: We must receive comments on this proposed AD by June 1, 2012.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact 
Boeing Commercial Airplanes, Attention: Data & Services Management, 
P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-
544-5000, extension 1; fax 206-766-5680; email me.boecom@boeing.com; 
Internet https://www.myboeingfleet.com. You may review copies of the 
referenced service information at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue SW., Renton, Washington.

[[Page 22687]]

For information on the availability of this material at the FAA, call 
425-227-1221.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this proposed AD, the regulatory 
evaluation, any comments received, and other information. The street 
address for the Docket Office (phone: 800-647-5527) is in the ADDRESSES 
section. Comments will be available in the AD docket shortly after 
receipt.

FOR FURTHER INFORMATION CONTACT: Wayne Lockett, Aerospace Engineer, 
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office 
(ACO), 1601 Lind Avenue SW., Renton, Washington 98057-3356; phone: 425-
917-6447; fax: 425-917-6590; email: wayne.lockett@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2012-0336; 
Directorate Identifier 2011-NM-213-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD because of those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    More than 300 incidents of skin chem-mill cracks on 26 airplanes 
have been reported from body station (STA) 727 to 1016, and from 
stringer S-14 to S-25 (left and right sides). The affected airplanes 
had accumulated between 29,808 and 53,454 total flight cycles. Most of 
the skin cracks were found aft of STA 747 on the left side. Several of 
the reported cracks occurred in multiple adjacent bays. On the existing 
skin panel assembly, the doubler is chem-milled to the skin. At these 
skin panel locations on the airplanes, the loads could cause a 
condition where skin cracks could form along the longitudinal edges of 
the doubler. This condition, if not corrected, could result in 
decompression of the airplane.

Relevant Service Information

    We reviewed Boeing Special Attention Service Bulletin 737-53-1315, 
dated July 29, 2011. For information on the procedures and compliance 
times, see this service information at http://www.regulations.gov by 
searching for Docket No. FAA-2012-0336. ``Related investigative 
actions'' and ``corrective actions'' are those actions specified in the 
service information that are necessary to address the identified unsafe 
condition.

FAA's Determination

    We are proposing this AD because we evaluated all the relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the same type design.

Proposed AD Requirements

    This proposed AD would require various repetitive inspections for 
cracking in the fuselage skin at the chem-mill steps. For airplanes on 
which cracking is found, this proposed AD would require doing one of 
the following:
     A time-limited repair, followed by related investigative 
actions (including a general visual inspection for loose or missing 
fasteners; an internal detailed inspection and a high frequency eddy 
current (HFEC) inspection for disbonding and cracks of the bonded 
doubler); corrective actions if necessary (i.e., replacing any loose or 
missing fastener, and contacting Boeing for repair instructions and 
doing the repair); and making the time-limited repair permanent; or
     A permanent repair, including a detailed inspection of the 
bonded doubler for disbonding, and an HFEC inspection for cracks in the 
bonded doubler; and repair of any cracks and disbonding. Accomplishment 
of the permanent repair would terminate the repetitive inspections 
required by this proposed AD for the area(s) of the repair only.

Difference Between the Proposed AD and the Service Information

    Boeing Special Attention Service Bulletin 737-53-1315, dated July 
29, 2011, specifies to contact the manufacturer for instructions on how 
to repair certain conditions, but this proposed AD would require 
repairing those conditions in one of the following ways:
     In accordance with a method that we approve; or
     Using data that meet the certification basis of the 
airplane, and that have been approved by the Boeing Commercial 
Airplanes Organization Designation Authorization (ODA) whom we have 
authorized to make those findings.

Costs of Compliance

    We estimate that this proposed AD affects 91 airplanes of U.S. 
registry. We estimate the following costs to comply with this proposed 
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                               Parts                             Cost on U.S.
              Action                      Labor cost            cost     Cost per  product        operators
----------------------------------------------------------------------------------------------------------------
Inspections......................  23 work-hours x $85 per          $0  $1,955 per           $177,905 per
                                    hour = $1,955 per                    inspection cycle.    inspection cycle.
                                    inspection cycle.
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary corrective 
actions that would be required based on the results of the proposed 
inspection. We have no way of determining the number of aircraft that 
might need these corrective actions:

[[Page 22688]]



                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                  Action                               Labor cost                Parts cost     Cost per product
----------------------------------------------------------------------------------------------------------------
Inspection...............................  2 work-hours x $85 per hour =                    $0              $170
                                            $170.
Repair...................................  7 work-hours x $85 per hour =                    $0              $595
                                            $595.
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

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

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) 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.

List of Subjects in 14 CFR Part 39

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

The Proposed Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

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

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


Sec.  39.13  [Amended]

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

The Boeing Company: Docket No. FAA-2012-0336; Directorate Identifier 
2011-NM-213-AD.

(a) Comments Due Date

    We must receive comments by June 1, 2012.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to The Boeing Company Model 737-500 series 
airplanes, certificated in any category, as identified in Boeing 
Special Attention Service Bulletin 737-53-1315, dated July 29, 2011.

(d) Subject

    Joint Aircraft System Component (JASC)/Air Transport Association 
(ATA) of America Code 53, Fuselage.

(e) Unsafe Condition

    This AD was prompted by reports of chem-mill step cracking on 
the aft lower lobe fuselage skins. We are issuing this AD to detect 
and correct step cracking on the aft lower lobe fuselage skins, 
which could result in decompression of the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Inspection

    At the applicable time specified in paragraph 1.E., 
``Compliance,'' of Boeing Special Attention Service Bulletin 737-53-
1315, dated July 29, 2011, except as required by paragraph (i)(1) of 
this AD: Do an external detailed inspection; and, as applicable, do 
an external or internal subsurface eddy current, magneto optic 
imager, or C-scan inspection; to detect cracks in the fuselage skin 
at the chem-mill steps; in accordance with the Accomplishment 
Instructions of Boeing Special Attention Service Bulletin 737-53-
1315, dated July 29, 2011. Repeat the inspections thereafter at the 
applicable times specified in paragraph 1.E., ``Compliance,'' of 
Boeing Special Attention Service Bulletin 737-53-1315, dated July 
29, 2011.

(h) Repair

    If any crack is found during any inspection required by 
paragraph (g) of this AD: At the applicable times specified in 
paragraph 1.E., ``Compliance,'' of Boeing Special Attention Service 
Bulletin 737-53-1315, dated July 29, 2011, do all the actions 
specified in either paragraph (h)(1) or (h)(2) of this AD.
    (1) Do a time-limited repair; followed by applicable related 
investigative actions, corrective actions, and making the time-
limited repair permanent; in accordance with Boeing Special 
Attention Service Bulletin 737-53-1315, dated July 29, 2011, except 
as required by paragraph (i)(2) of this AD.
    (2) Do a permanent repair, including a detailed inspection of 
the bonded doubler for disbonding and a high frequency eddy current 
inspection for cracks of the bonded doubler, in accordance with 
Boeing Special Attention Service Bulletin 737-53-1315, dated July 
29, 2011. Repair any cracks and disbonding before further flight, in 
accordance with Boeing Special Attention Service Bulletin 737-53-
1315, dated July 29, 2011, except as required by paragraph (i)(2) of 
this AD. Accomplishment of the permanent repair terminates the 
repetitive inspections required by this AD for the area(s) of the 
repair only.

(i) Exceptions to Service Bulletin Specifications

    The exceptions specified in paragraphs (i)(1) and (i)(2) of this 
AD apply to this AD.
    (1) Where Boeing Special Attention Service Bulletin 737-53-1315, 
dated July 29, 2011, specifies a compliance time after the date on 
this service bulletin, this AD requires compliance within the 
specified compliance time after the effective date of this AD.
    (2) Where Boeing Special Attention Service Bulletin 737-53-1315, 
dated July 29, 2011, specifies to contact Boeing for repair 
instructions: Before further flight, repair using a method approved 
in accordance with the procedures specified in paragraph (j) of this 
AD.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Seattle Aircraft Certification Office (ACO), 
FAA, has the authority to approve AMOCs for this AD, if requested 
using the procedures found in 14 CFR 39.19. In accordance with 14 
CFR 39.19, send your request to your principal inspector or local 
Flight Standards District Office, as appropriate. If sending 
information directly to the manager of the ACO, it may be emailed to 
9-ANM-Seattle-ACO-AMOC-Requests@faa.gov.
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager

[[Page 22689]]

of the local flight standards district office/certificate holding 
district office.
    (3) An AMOC that provides an acceptable level of safety may be 
used for any repair required by this AD if it is approved by the 
Boeing Commercial Airplanes Organization Designation Authorization 
(ODA) that 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.

(k) Related Information

    (1) For more information about this AD, contact Wayne Lockett, 
Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft 
Certification Office (ACO), 1601 Lind Avenue SW., Renton, Washington 
98057-3356; phone: 425-917-6447; fax: 425-917-6590; email: 
wayne.lockett@faa.gov.
    (2) For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Data & Services Management, 
P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 
206-544-5000, extension 1; fax 206-766-5680; email 
me.boecom@boeing.com; Internet https://www.myboeingfleet.com. You 
may also review the referenced service information in the docket at 
www.regulations.gov (refer to Docket No. FAA-2012-0336). You may 
review copies of the referenced service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, 
Washington 98057-3356. For information on the availability of this 
material at the FAA, call 425-227-1221.

    Issued in Renton, Washington, on April 5, 2012.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2012-9177 Filed 4-16-12; 8:45 am]
BILLING CODE 4910-13-P