Airworthiness Directives; The Boeing Company Airplanes, 21276-21279 [2013-08342]

Download as PDF 21276 Federal Register / Vol. 78, No. 69 / Wednesday, April 10, 2013 / Proposed Rules III. Publicly Available Documents The NRC has posted on www.regulations.gov for public availability the draft regulatory basis to incorporate requirements involving station blackout mitigation strategies (ADAMS Accession No. ML13077A453). The draft regulatory basis documents the reasons why the NRC determined that rulemaking is the appropriate course of action to remedy a regulatory shortcoming. In addition, in Appendix A, the draft regulatory basis provides a discussion of rule language concepts that the NRC staff is considering for this potential rulemaking. Appendix A also contains a set of questions soliciting stakeholder feedback in areas that would support the NRC staff in developing a proposed rule. The draft rule concepts provide the NRC’s current thoughts about what requirements would be needed. The draft rule concepts do not represent a final NRC staff position nor have they been reviewed by the Commission. These concepts may undergo significant revision during the rulemaking process. The NRC is requesting formal public comments on the draft regulatory basis and the draft rule concepts. The NRC may post additional materials to the Federal rulemaking Web site at www.regulations.gov under Docket ID NRC–2011–0299. The Federal rulemaking Web site allows you to receive alerts when changes or additions occur in a docket folder. To subscribe: (1) Navigate to the docket folder (NRC–2011–0299); (2) click the ‘‘Email Alert’’ link; and (3) enter your email address and select how frequently you would like to receive emails (daily, weekly, or monthly). Dated at Rockville, Maryland, this 2nd day of April, 2013. For the Nuclear Regulatory Commission. Lawrence E. Kokajko, Director, Division of Policy and Rulemaking, Office of Nuclear Reactor Regulation. [FR Doc. 2013–08216 Filed 4–9–13; 8:45 am] BILLING CODE 7590–01–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration mstockstill on DSK4VPTVN1PROD with PROPOSALS 14 CFR Part 39 [Docket No. FAA–2013–0301; Directorate Identifier 2013–NM–025–AD] RIN 2120–AA64 Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration (FAA), DOT. AGENCY: VerDate Mar<15>2010 16:39 Apr 09, 2013 Jkt 229001 Notice of proposed rulemaking (NPRM). ACTION: We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 767–200, –300, –300F, and –400ER series airplanes. This proposed AD was prompted by reports of cracked and corroded nuts on an outboard flap support rib. This proposed AD would require, for certain airplanes, repetitive inspections of the cap seal for damaged sealant on nuts common to certain outboard flap support ribs, related investigative and corrective actions if necessary, and replacement of all fasteners in the support ribs, which terminates the repetitive inspections. For certain other airplanes, this proposed AD would require repetitive inspections of the cap seal for damaged sealant on nuts common to certain outboard flap support ribs, related investigative and corrective actions if necessary, and if necessary, a detailed inspection to determine the nut type installed in the outboard flap support rib and corrective actions; for these airplanes, this proposed AD provides optional replacement of all fasteners in the support ribs, which would terminate the repetitive inspections. We are proposing this AD to detect and correct cracked and corroded nuts and bolts and the installation of incorrect nuts on certain outboard flap support ribs, which could lead to additional nut and bolt damage in the joint, and result in loss of an outboard flap, and adversely affect continued safe flight and landing of the airplane. DATES: We must receive comments on this proposed AD by May 28, 2013. 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 https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For Boeing service information identified in this proposed AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H–65, Seattle, WA 98124–2207; telephone 206–544–5000, extension 1; fax 206–766–5680; Internet https://www.myboeingfleet.com. You SUMMARY: PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227– 1221. Examining the AD Docket You may examine the AD docket on the Internet at https:// www.regulations.gov; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (phone: 800–647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Berhane Alazar, Aerospace Engineer, Airframe Branch, ANM–120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, Washington 98057–3356; phone: 425– 917–6577; fax: 425–917–6590; email: berhane.alazar@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– 2013–0301; Directorate Identifier 2013– NM–025–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments. We will post all comments we receive, without change, to https:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Discussion We received reports that two cracked and corroded nuts were found on support rib number 2 of an outboard flap. It was determined that incorrect nuts were installed on support rib numbers 2 and 7. The correct nuts for this installation have part number (P/N) BACN10HR12 and a torque of 3,300 to 4,300 inch-pounds (in-lbs). The installed incorrect nuts have P/N E:\FR\FM\10APP1.SGM 10APP1 Federal Register / Vol. 78, No. 69 / Wednesday, April 10, 2013 / Proposed Rules NAS1804–12 and a torque of 2,400 to 3,500 in-lbs. The installed P/N NAS1804–12 nuts might have been over-torqued. Over-torqued nuts are at risk of fracture. Fractured nuts could create a breach in the cap seal and allow moisture to contact the nuts, resulting in corrosion. Nut fractures could lead to additional nut or bolt fractures within that support rib, and these additional fractures could cause the joint to be compromised. We are proposing this AD to detect and correct cracked and corroded nuts and bolts and the installation of incorrect nuts on certain outboard flap support ribs, which could lead to additional nut and bolt damage in the joint, and result in loss of an outboard flap, and adversely affect continued safe flight and landing of the airplane. Relevant Service Information We reviewed Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012. For information on the procedures and compliance times, see this service information at https:// www.regulations.gov by searching for Docket No. FAA–2013–0301. 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 accomplishing the actions specified in the service information described previously. 21277 The phrase ‘‘related investigative actions’’ might be used in this proposed AD. ‘‘Related investigative actions’’ are follow-on actions that (1) are related to the primary action, and (2) are actions that further investigate the nature of any condition found. Related investigative actions in an AD could include, for example, inspections. In addition, the phrase ‘‘corrective actions’’ might be used in this proposed AD. ‘‘Corrective actions’’ are actions that correct or address any condition found. Corrective actions in an AD could include, for example, repairs. Costs of Compliance We estimate that this proposed AD affects 440 airplanes of U.S. registry. We estimate the following costs to comply with this proposed AD: ESTIMATED COSTS Action Labor cost Detailed inspections ............................................ Replacement of all fasteners (Group 1 airplanes). 1 work-hour × $85 per hour = $85 .................... 2 work-hours × $85 per hour = $170 ................. We estimate the following costs to do any necessary related investigative and corrective actions and detailed Parts cost inspections for nut type that would be required based on the results of the proposed inspections. We have no way $0 2,553 Cost per product $85 2,723 Cost on U.S. operators $37,400 1,198,120 of determining the number of aircraft that might need these actions. ON-CONDITION COSTS Action Labor cost Related investigative and corrective actions and detailed inspection for nut type. Up to 3 work-hours × $85 per hour = $255 ................... mstockstill on DSK4VPTVN1PROD with PROPOSALS According to the manufacturer, some of the costs of this proposed AD may be covered under warranty, thereby reducing the cost impact on affected individuals. We do not control warranty coverage for affected individuals. As a result, we have included all costs in our cost estimate. 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 VerDate Mar<15>2010 16:39 Apr 09, 2013 Jkt 229001 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: PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 Parts cost $2,553 Cost per product Up to $2,808 (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: E:\FR\FM\10APP1.SGM 10APP1 21278 Federal Register / Vol. 78, No. 69 / Wednesday, April 10, 2013 / Proposed Rules 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– 2013–0301; Directorate Identifier 2013– NM–025–AD. (a) Comments Due Date We must receive comments by May 28, 2013. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 767–200, 767–300, 767–300F, and 767–400ER series airplanes; certificated in any category; as identified in Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012. (d) Subject Joint Aircraft System Component (JASC)/ Air Transport Association (ATA) of America Code 57, Wings. (e) Unsafe Condition This AD was prompted by reports of cracked and corroded nuts on an outboard flap support rib. We are issuing this AD to detect and correct cracked and corroded nuts and bolts and the installation of incorrect nuts on certain outboard flap support ribs, which could lead to additional nut and bolt damage in the joint, and result in loss of an outboard flap, and adversely affect continued safe flight and landing of the airplane. mstockstill on DSK4VPTVN1PROD with PROPOSALS (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) For Group 1 Airplanes: Repetitive Inspections of the Support Ribs, Related Investigative and Corrective Actions, and Fastener Replacement For Group 1 airplanes, as specified in Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012: Except as required by paragraph (j) of this AD, at the time specified in table 1 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012: Do a detailed inspection of the cap seal for damaged sealant on the nuts common to outboard flap support rib numbers 1, 2, 7, and 8, and do all applicable related investigative and corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012. Do all applicable related investigative and corrective actions before further flight, except as specified in paragraphs (g)(1)(ii) and (g)(2)(ii) of this AD. VerDate Mar<15>2010 16:39 Apr 09, 2013 Jkt 229001 (1) If, during any detailed inspection of the cap seal required by paragraph (g) of this AD, no damaged sealant is found on any support rib, do the actions specified in paragraphs (g)(1)(i) and (g)(1)(ii) of this AD. (i) Repeat the detailed inspection of the cap seal on that support rib thereafter at the intervals specified in table 1 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012, until all fasteners are replaced within that support rib as required by paragraph (g)(1)(ii) of this AD. (ii) Except as required by paragraph (j) of this AD, at the time specified in table 1 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012: Replace all fasteners within the support rib in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012. (2) If, during any related investigative action required by paragraph (g) of this AD, no cracking and no corrosion is found on the nut, bolt, and washers of any support rib, do the actions specified in paragraphs (g)(2)(i) and (g)(2)(ii) of this AD. (i) Repeat the detailed inspection of the cap seal on that support rib thereafter at the intervals specified in table 1 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012, until all fasteners are replaced within that support rib as required by paragraph (g)(2)(ii) of this AD. (ii) Except as required by paragraph (j) of this AD, at the time specified in table 1 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012: Replace all fasteners within the support rib in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012. (h) For Group 2 and 3 Airplanes: Repetitive Inspections of the Support Ribs, Related Investigative and Corrective Actions, and Fastener Replacement For Group 2 and 3 airplanes, as specified in Boeing Alert Service Bulletin 767– 57A0131, dated October 30, 2012: Except as required by paragraph (j) of this AD, at the time specified in table 2 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012: Do a detailed inspection of the cap seal for damaged sealant on the nuts common to outboard flap support rib numbers 1, 2, 7, and 8, and do all applicable related investigative and corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012. Do all applicable related investigative and corrective actions before further flight. (1) If, during any detailed inspection of the cap seal required by paragraph (h) of this AD, no damaged sealant is found on any support rib, do the actions specified in paragraphs (h)(1)(i) and (h)(1)(ii) of this AD. (i) Repeat the detailed inspection of the cap seal on that support rib thereafter at the intervals specified in table 1 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 Bulletin 767–57A0131, dated October 30, 2012, until the actions required by paragraph (h)(1)(ii) of this AD are done or until all fasteners are replaced within that support rib as specified in paragraph (i) of this AD. (ii) Except as required by paragraph (j) of this AD, at the time specified in table 2 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012: Do a detailed inspection to determine the nut type installed in the outboard flap support rib and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012. Do all applicable corrective actions before further flight. (2) If, during any related investigative action required by paragraph (h) of this AD, no cracking and no corrosion is found on the nut, bolt, and washers of any support rib, do the actions specified in paragraphs (h)(2)(i) and (h)(2)(ii) of this AD. (i) Repeat the detailed inspection of the cap seal on that support rib thereafter at the intervals specified in table 2 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012, until the actions required by paragraph (h)(2)(ii) of this AD are done or until all fasteners are replaced within that support rib as specified in paragraph (i) of this AD. (ii) Except as required by paragraph (j) of this AD, at the time specified in table 2 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012: Do a detailed inspection to determine the nut type installed in the outboard flap support rib and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012. Do all applicable corrective actions before further flight. (i) Replacement of all Fasteners Within Outboard Flap Support Ribs 1, 2, 7, and 8 Replacing all fasteners within outboard flap support rib number 1, 2, 7, or 8, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767–57A0131, dated October 30, 2012, terminates the inspections required by paragraphs (g) and (h) of this AD for that support rib only. (j) Exception to Service Information Where Boeing Alert Service Bulletin 767– 57A0131, dated October 30, 2012, specifies a compliance time relative to the issue date of that service bulletin, this AD requires compliance within the specified compliance time after the effective date of this AD. (k) 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, send it to the attention of the person identified in the Related Information section of this AD. E:\FR\FM\10APP1.SGM 10APP1 Federal Register / Vol. 78, No. 69 / Wednesday, April 10, 2013 / Proposed Rules Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager 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. (l) Related Information (1) For more information about this AD, contact Berhane Alazar, Aerospace Engineer, Airframe Branch, ANM–120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, Washington 98057– 3356; phone: 425–917–6577; fax: 425–917– 6590; email: berhane.alazar@faa.gov. (2) For Boeing service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H–65, Seattle, WA 98124–2207; telephone 206–544–5000, extension 1; fax 206–766– 5680; Internet https:// www.myboeingfleet.com. You may also review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221. Issued in Renton, Washington, on March 28, 2013. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2013–08342 Filed 4–9–13; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2013–0302; Directorate Identifier 2013–NM–019–AD] RIN 2120–AA64 Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). mstockstill on DSK4VPTVN1PROD with PROPOSALS AGENCY: We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model 737–100 and –200 series airplanes. The existing AD currently requires replacement of SUMMARY: VerDate Mar<15>2010 16:39 Apr 09, 2013 Jkt 229001 certain underwing fuel tank access covers with stronger, fire-resistant covers. Since we issued that AD, we received reports of standard access doors installed where impact resistant access doors are required and reports of impact resistant doors without stencils. This proposed AD would require inspecting fuel tank access doors to determine that impact resistant access doors are installed in the correct locations, inspecting application of stencils and index markers of impact resistant access doors, corrective actions if necessary, revising the maintenance program, and adding airplanes to the applicability. We are proposing this AD to prevent foreign object penetration of the wing tank, which could lead to a fuel leak near ignition sources (engine, hot brakes), consequently leading to a fuel-fed fire. DATES: We must receive comments on this proposed AD by May 28, 2013. 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 https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. • Hand Delivery: 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, WA 98124–2207; telephone 206–544–5000, extension 1; fax 206–766–5680; Internet https:// www.myboeingfleet.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221. Examining the AD Docket You may examine the AD docket on the Internet at https:// www.regulations.gov; or in person at the Docket Management Facility between 9 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 PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 21279 ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Suzanne Lucier, Aerospace Engineer, Propulsion Branch, ANM–140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, Washington 98057–3356; phone: 425– 917–6438; fax: 425–917–6590; email: suzanne.lucier@faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2013–0302; Directorate Identifier 2013–NM–019–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments. We will post all comments we receive, without change, to https:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Discussion On December 29, 1986, we issued AD 87–02–07, Amendment 39–5506 (Docket No. 86–NM–175–AD; 52 FR 518–01, January 7, 1987), for certain Model 737– 100 and 737–200 series airplanes. That AD requires replacement of certain underwing fuel tank access covers with stronger, fire-resistant covers. That AD resulted from an incident of cover penetration, which resulted in a fire and total loss of the airplane. We issued that AD to prevent foreign object penetration of the wing tank, which could lead to a fuel leak near ignition sources (engine, hot brakes), consequently leading to a fuel-fed fire. Actions Since Existing AD Was Issued Since we issued AD 87–02–07, Amendment 39–5506 (Docket No. 86– NM–175–AD; 52 FR 518–01, January 7, 1987), we received reports of standard access doors installed where impact resistant access doors are required and reports of impact resistant doors without stencils. Relevant Service Information We reviewed Boeing Service Bulletin 737–28–1286, dated January 10, 2012. E:\FR\FM\10APP1.SGM 10APP1

Agencies

[Federal Register Volume 78, Number 69 (Wednesday, April 10, 2013)]
[Proposed Rules]
[Pages 21276-21279]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-08342]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0301; Directorate Identifier 2013-NM-025-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 767-200, -300, -300F, and -400ER 
series airplanes. This proposed AD was prompted by reports of cracked 
and corroded nuts on an outboard flap support rib. This proposed AD 
would require, for certain airplanes, repetitive inspections of the cap 
seal for damaged sealant on nuts common to certain outboard flap 
support ribs, related investigative and corrective actions if 
necessary, and replacement of all fasteners in the support ribs, which 
terminates the repetitive inspections. For certain other airplanes, 
this proposed AD would require repetitive inspections of the cap seal 
for damaged sealant on nuts common to certain outboard flap support 
ribs, related investigative and corrective actions if necessary, and if 
necessary, a detailed inspection to determine the nut type installed in 
the outboard flap support rib and corrective actions; for these 
airplanes, this proposed AD provides optional replacement of all 
fasteners in the support ribs, which would terminate the repetitive 
inspections. We are proposing this AD to detect and correct cracked and 
corroded nuts and bolts and the installation of incorrect nuts on 
certain outboard flap support ribs, which could lead to additional nut 
and bolt damage in the joint, and result in loss of an outboard flap, 
and adversely affect continued safe flight and landing of the airplane.

DATES: We must receive comments on this proposed AD by May 28, 2013.

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 https://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For Boeing service information identified in this proposed AD, 
contact Boeing Commercial Airplanes, Attention: Data & Services 
Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone 
206-544-5000, extension 1; fax 206-766-5680; Internet https://www.myboeingfleet.com. You may review copies of the referenced service 
information at the FAA, Transport Airplane Directorate, 1601 Lind 
Avenue SW., Renton, Washington. For information on the availability of 
this material at the FAA, call 425-227-1221.

Examining the AD Docket

    You may examine the AD docket on the Internet at https://www.regulations.gov; or in person at the Docket Management Facility 
between 9 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: Berhane Alazar, Aerospace Engineer, 
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 
1601 Lind Avenue SW., Renton, Washington 98057-3356; phone: 425-917-
6577; fax: 425-917-6590; email: berhane.alazar@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-2013-0301; 
Directorate Identifier 2013-NM-025-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD because of those comments.
    We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    We received reports that two cracked and corroded nuts were found 
on support rib number 2 of an outboard flap. It was determined that 
incorrect nuts were installed on support rib numbers 2 and 7. The 
correct nuts for this installation have part number (P/N) BACN10HR12 
and a torque of 3,300 to 4,300 inch-pounds (in-lbs). The installed 
incorrect nuts have P/N

[[Page 21277]]

NAS1804-12 and a torque of 2,400 to 3,500 in-lbs. The installed P/N 
NAS1804-12 nuts might have been over-torqued. Over-torqued nuts are at 
risk of fracture. Fractured nuts could create a breach in the cap seal 
and allow moisture to contact the nuts, resulting in corrosion. Nut 
fractures could lead to additional nut or bolt fractures within that 
support rib, and these additional fractures could cause the joint to be 
compromised. We are proposing this AD to detect and correct cracked and 
corroded nuts and bolts and the installation of incorrect nuts on 
certain outboard flap support ribs, which could lead to additional nut 
and bolt damage in the joint, and result in loss of an outboard flap, 
and adversely affect continued safe flight and landing of the airplane.

Relevant Service Information

    We reviewed Boeing Alert Service Bulletin 767-57A0131, dated 
October 30, 2012. For information on the procedures and compliance 
times, see this service information at https://www.regulations.gov by 
searching for Docket No. FAA-2013-0301.

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 accomplishing the actions specified 
in the service information described previously.
    The phrase ``related investigative actions'' might be used in this 
proposed AD. ``Related investigative actions'' are follow-on actions 
that (1) are related to the primary action, and (2) are actions that 
further investigate the nature of any condition found. Related 
investigative actions in an AD could include, for example, inspections.
    In addition, the phrase ``corrective actions'' might be used in 
this proposed AD. ``Corrective actions'' are actions that correct or 
address any condition found. Corrective actions in an AD could include, 
for example, repairs.

Costs of Compliance

    We estimate that this proposed AD affects 440 airplanes of U.S. 
registry.
    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                       Cost per    Cost on U.S.
                  Action                            Labor cost           Parts cost    product       operators
----------------------------------------------------------------------------------------------------------------
Detailed inspections.....................  1 work-hour x $85 per hour            $0          $85         $37,400
                                            = $85.
Replacement of all fasteners (Group 1      2 work-hours x $85 per hour        2,553        2,723       1,198,120
 airplanes).                                = $170.
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary related 
investigative and corrective actions and detailed inspections for nut 
type that would be required based on the results of the proposed 
inspections. We have no way of determining the number of aircraft that 
might need these actions.

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                Action                            Labor cost             Parts cost       Cost per  product
----------------------------------------------------------------------------------------------------------------
Related investigative and corrective    Up to 3 work-hours x $85 per         $2,553  Up to $2,808
 actions and detailed inspection for     hour = $255.
 nut type.
----------------------------------------------------------------------------------------------------------------

    According to the manufacturer, some of the costs of this proposed 
AD may be covered under warranty, thereby reducing the cost impact on 
affected individuals. We do not control warranty coverage for affected 
individuals. As a result, we have included all costs in our cost 
estimate.

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:

[[Page 21278]]

PART 39--AIRWORTHINESS DIRECTIVES

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

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


Sec.  39.13  [Amended]

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

The Boeing Company: Docket No. FAA-2013-0301; Directorate Identifier 
2013-NM-025-AD.

(a) Comments Due Date

    We must receive comments by May 28, 2013.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to The Boeing Company Model 767-200, 767-300, 
767-300F, and 767-400ER series airplanes; certificated in any 
category; as identified in Boeing Alert Service Bulletin 767-
57A0131, dated October 30, 2012.

(d) Subject

    Joint Aircraft System Component (JASC)/Air Transport Association 
(ATA) of America Code 57, Wings.

(e) Unsafe Condition

    This AD was prompted by reports of cracked and corroded nuts on 
an outboard flap support rib. We are issuing this AD to detect and 
correct cracked and corroded nuts and bolts and the installation of 
incorrect nuts on certain outboard flap support ribs, which could 
lead to additional nut and bolt damage in the joint, and result in 
loss of an outboard flap, and adversely affect continued safe flight 
and landing of the airplane.

(f) Compliance

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

(g) For Group 1 Airplanes: Repetitive Inspections of the Support Ribs, 
Related Investigative and Corrective Actions, and Fastener Replacement

    For Group 1 airplanes, as specified in Boeing Alert Service 
Bulletin 767-57A0131, dated October 30, 2012: Except as required by 
paragraph (j) of this AD, at the time specified in table 1 of 
paragraph 1.E., ``Compliance,'' of Boeing Alert Service Bulletin 
767-57A0131, dated October 30, 2012: Do a detailed inspection of the 
cap seal for damaged sealant on the nuts common to outboard flap 
support rib numbers 1, 2, 7, and 8, and do all applicable related 
investigative and corrective actions, in accordance with the 
Accomplishment Instructions of Boeing Alert Service Bulletin 767-
57A0131, dated October 30, 2012. Do all applicable related 
investigative and corrective actions before further flight, except 
as specified in paragraphs (g)(1)(ii) and (g)(2)(ii) of this AD.
    (1) If, during any detailed inspection of the cap seal required 
by paragraph (g) of this AD, no damaged sealant is found on any 
support rib, do the actions specified in paragraphs (g)(1)(i) and 
(g)(1)(ii) of this AD.
    (i) Repeat the detailed inspection of the cap seal on that 
support rib thereafter at the intervals specified in table 1 of 
paragraph 1.E., ``Compliance,'' of Boeing Alert Service Bulletin 
767-57A0131, dated October 30, 2012, until all fasteners are 
replaced within that support rib as required by paragraph (g)(1)(ii) 
of this AD.
    (ii) Except as required by paragraph (j) of this AD, at the time 
specified in table 1 of paragraph 1.E., ``Compliance,'' of Boeing 
Alert Service Bulletin 767-57A0131, dated October 30, 2012: Replace 
all fasteners within the support rib in accordance with the 
Accomplishment Instructions of Boeing Alert Service Bulletin 767-
57A0131, dated October 30, 2012.
    (2) If, during any related investigative action required by 
paragraph (g) of this AD, no cracking and no corrosion is found on 
the nut, bolt, and washers of any support rib, do the actions 
specified in paragraphs (g)(2)(i) and (g)(2)(ii) of this AD.
    (i) Repeat the detailed inspection of the cap seal on that 
support rib thereafter at the intervals specified in table 1 of 
paragraph 1.E., ``Compliance,'' of Boeing Alert Service Bulletin 
767-57A0131, dated October 30, 2012, until all fasteners are 
replaced within that support rib as required by paragraph (g)(2)(ii) 
of this AD.
    (ii) Except as required by paragraph (j) of this AD, at the time 
specified in table 1 of paragraph 1.E., ``Compliance,'' of Boeing 
Alert Service Bulletin 767-57A0131, dated October 30, 2012: Replace 
all fasteners within the support rib in accordance with the 
Accomplishment Instructions of Boeing Alert Service Bulletin 767-
57A0131, dated October 30, 2012.

(h) For Group 2 and 3 Airplanes: Repetitive Inspections of the Support 
Ribs, Related Investigative and Corrective Actions, and Fastener 
Replacement

    For Group 2 and 3 airplanes, as specified in Boeing Alert 
Service Bulletin 767-57A0131, dated October 30, 2012: Except as 
required by paragraph (j) of this AD, at the time specified in table 
2 of paragraph 1.E., ``Compliance,'' of Boeing Alert Service 
Bulletin 767-57A0131, dated October 30, 2012: Do a detailed 
inspection of the cap seal for damaged sealant on the nuts common to 
outboard flap support rib numbers 1, 2, 7, and 8, and do all 
applicable related investigative and corrective actions, in 
accordance with the Accomplishment Instructions of Boeing Alert 
Service Bulletin 767-57A0131, dated October 30, 2012. Do all 
applicable related investigative and corrective actions before 
further flight.
    (1) If, during any detailed inspection of the cap seal required 
by paragraph (h) of this AD, no damaged sealant is found on any 
support rib, do the actions specified in paragraphs (h)(1)(i) and 
(h)(1)(ii) of this AD.
    (i) Repeat the detailed inspection of the cap seal on that 
support rib thereafter at the intervals specified in table 1 of 
paragraph 1.E., ``Compliance,'' of Boeing Alert Service Bulletin 
767-57A0131, dated October 30, 2012, until the actions required by 
paragraph (h)(1)(ii) of this AD are done or until all fasteners are 
replaced within that support rib as specified in paragraph (i) of 
this AD.
    (ii) Except as required by paragraph (j) of this AD, at the time 
specified in table 2 of paragraph 1.E., ``Compliance,'' of Boeing 
Alert Service Bulletin 767-57A0131, dated October 30, 2012: Do a 
detailed inspection to determine the nut type installed in the 
outboard flap support rib and do all applicable corrective actions, 
in accordance with the Accomplishment Instructions of Boeing Alert 
Service Bulletin 767-57A0131, dated October 30, 2012. Do all 
applicable corrective actions before further flight.
    (2) If, during any related investigative action required by 
paragraph (h) of this AD, no cracking and no corrosion is found on 
the nut, bolt, and washers of any support rib, do the actions 
specified in paragraphs (h)(2)(i) and (h)(2)(ii) of this AD.
    (i) Repeat the detailed inspection of the cap seal on that 
support rib thereafter at the intervals specified in table 2 of 
paragraph 1.E., ``Compliance,'' of Boeing Alert Service Bulletin 
767-57A0131, dated October 30, 2012, until the actions required by 
paragraph (h)(2)(ii) of this AD are done or until all fasteners are 
replaced within that support rib as specified in paragraph (i) of 
this AD.
    (ii) Except as required by paragraph (j) of this AD, at the time 
specified in table 2 of paragraph 1.E., ``Compliance,'' of Boeing 
Alert Service Bulletin 767-57A0131, dated October 30, 2012: Do a 
detailed inspection to determine the nut type installed in the 
outboard flap support rib and do all applicable corrective actions, 
in accordance with the Accomplishment Instructions of Boeing Alert 
Service Bulletin 767-57A0131, dated October 30, 2012. Do all 
applicable corrective actions before further flight.

(i) Replacement of all Fasteners Within Outboard Flap Support Ribs 1, 
2, 7, and 8

    Replacing all fasteners within outboard flap support rib number 
1, 2, 7, or 8, in accordance with the Accomplishment Instructions of 
Boeing Alert Service Bulletin 767-57A0131, dated October 30, 2012, 
terminates the inspections required by paragraphs (g) and (h) of 
this AD for that support rib only.

(j) Exception to Service Information

    Where Boeing Alert Service Bulletin 767-57A0131, dated October 
30, 2012, specifies a compliance time relative to the issue date of 
that service bulletin, this AD requires compliance within the 
specified compliance time after the effective date of this AD.

(k) 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, send it to the 
attention of the person identified in the Related Information 
section of this AD.

[[Page 21279]]

Information 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 
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.

(l) Related Information

    (1) For more information about this AD, contact Berhane Alazar, 
Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft 
Certification Office, 1601 Lind Avenue SW., Renton, Washington 
98057-3356; phone: 425-917-6577; fax: 425-917-6590; email: 
berhane.alazar@faa.gov.
    (2) For Boeing service information identified in this AD, 
contact Boeing Commercial Airplanes, Attention: Data & Services 
Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; 
telephone 206-544-5000, extension 1; fax 206-766-5680; Internet 
https://www.myboeingfleet.com. You may also review copies of the 
referenced service information at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue SW., Renton, Washington. For 
information on the availability of this material at the FAA, call 
425-227-1221.

    Issued in Renton, Washington, on March 28, 2013.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2013-08342 Filed 4-9-13; 8:45 am]
BILLING CODE 4910-13-P

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