Airworthiness Directives; The Boeing Company Airplanes, 56156-56158 [2017-25379]

Download as PDF 56156 Federal Register / Vol. 82, No. 227 / Tuesday, November 28, 2017 / Rules and Regulations DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 FOR FURTHER INFORMATION CONTACT: [Docket No. FAA–2017–0526; Product Identifier 2017–NM–026–AD; Amendment 39–19109; AD 2017–24–05] RIN 2120–AA64 Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737–100, –200, –200C, –300, –400, and –500 series airplanes. This AD was prompted by reports of cracking in the upper aft skin at the rear spar of the wings. This AD requires repetitive inspections for cracking of the upper aft skin of the wings, and repair if necessary. We are issuing this AD to address the unsafe condition on these products. DATES: This AD is effective January 2, 2018. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of January 2, 2018. ADDRESSES: For service information identified in this final rule, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110–SK57, Seal Beach, CA 90740; telephone 562–797–1717; Internet https://www.myboeingfleet.com. You may view this service information at the FAA, Transport Standards Branch, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425–227–1221. It is also available on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA–2017– 0526. jstallworth on DSKBBY8HB2PROD with RULES Examining the AD Docket You may examine the AD docket on the Internet at http:// www.regulations.gov by searching for and locating Docket No. FAA–2017– 0526; 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 final rule, the regulatory evaluation, any comments received, and other information. The address for the Docket Office (phone: 800–647–5527) is Docket Management Facility, U.S. Department of Transportation, Docket 15:23 Nov 27, 2017 Payman Soltani, Aerospace Engineer, Airframe Section, FAA, Los Angeles ACO Branch, 3960 Paramount Boulevard, Lakewood, CA 90712–4137; phone: 562–627–5313; fax: 562–627– 5210; email: payman.soltani@faa.gov. SUPPLEMENTARY INFORMATION: Discussion SUMMARY: VerDate Sep<11>2014 Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. Jkt 244001 We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all The Boeing Company Model 737–100, –200, –200C, –300, –400, and –500 series airplanes. The NPRM published in the Federal Register on June 5, 2017 (82 FR 25744). The NPRM was prompted by reports of cracking in the upper aft skin at the rear spar of the wings. The NPRM proposed to require repetitive inspections for cracking of the upper aft skin of the wings, and repair if necessary. Comments We gave the public the opportunity to participate in developing this final rule. The following presents the comments received on the NPRM and the FAA’s response to each comment. Effect of Winglets on Accomplishment of the Proposed Actions Aviation Partners Boeing (APB) stated that the installation of winglets per Supplemental Type Certificate (STC) ST01219SE does not affect the accomplishment of the manufacturer’s service instructions. Southwest Airlines requested clarification that additional alternative method of compliance (AMOC) approvals are not necessary during accomplishment of the actions specified in Boeing Alert Service Bulletin 737– 57A1329, dated January 16, 2017, if the installation of winglets was done using STC ST01219SE. We agree with the commenters’ statements. We have redesignated paragraph (c) of the proposed AD as paragraph (c)(1) of this AD and added paragraph (c)(2) to this AD to state that installation of STC ST01219SE does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST01219SE is installed, a ‘‘change in product’’ AMOC approval request is not necessary to comply with the requirements of 14 CFR 39.17. PO 00000 Frm 00006 Fmt 4700 Sfmt 4700 Request To Revise Certain Corrective Action Requirements All Nippon Airways (ANA) asked that we revise paragraph (h) of the proposed AD to change the compliance method for crack repair to allow use of the Boeing 737–500 Structural Repair Manual (SRM) 57–20–10, Repair 7. ANA stated that Boeing has already developed the repair procedure for the outer wing upper aft skin at the trailing edge between wing buttock line (WBL) 160 and WBL 205, as specified in Boeing 737–500 SRM 57–20–10, Repair 7. ANA added that the repair procedure is applicable to part of an inspection area specified in Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017. ANA noted that its request should be considered to reduce AMOC requests. We disagree with the request. Boeing has indicated that Repair 7 of the SRM is currently being revised. We do not consider that delaying this rulemaking until release of the revised service information is warranted. However, under the provisions of paragraph (j) of this AD, we will consider requests for approval of alternative service information if sufficient data are submitted to substantiate that the service information would provide an acceptable level of safety. Boeing has indicated it intends to request approval of a global AMOC for the revised service information after this AD is published. Therefore, we have made no change to this AD in this regard. Request To Clarify Certain Requirements Boeing asked that paragraph (g) of the proposed AD, and the heading for paragraph (g), be changed to include ‘‘corrective actions’’ to clarify that corrective actions may be required. We agree with the commenter’s request. We have revised paragraph (g) of this AD accordingly. Boeing also asked that the header for paragraph (h) of the proposed AD be changed to remove ‘‘repetitive’’ because merely specifying ‘‘inspections’’ addresses both initial and repetitive inspections. We agree to clarify the terminology in the header for paragraph (h) of this AD. We do not presume that the term ‘‘repetitive’’ necessarily excludes the initial action. An action cannot be repeated without accomplishment of the initial action. Many existing ADs use the term ‘‘repetitive’’ actions, which we intend as including the initial action. Therefore, we have not changed this AD regarding this issue. E:\FR\FM\28NOR1.SGM 28NOR1 Federal Register / Vol. 82, No. 227 / Tuesday, November 28, 2017 / Rules and Regulations Conclusion We reviewed the relevant data, considered the comments received, and determined that air safety and the public interest require adopting this final rule with the changes described previously and minor editorial changes. We have determined that these minor changes: • Are consistent with the intent that was proposed in the NPRM for correcting the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM. We also determined that these changes will not increase the economic burden on any operator or increase the scope of this final rule. Related Service Information Under 1 CFR Part 51 We reviewed Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017. The service information describes procedures for repetitive surface high frequency eddy current inspections, low frequency eddy current inspections, and detailed inspections on airplanes with or without an external 56157 repair, for cracking of the upper aft skin from WBL 159 to WBL 220. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. Costs of Compliance We estimate that this AD affects 471 airplanes of U.S. registry. We estimate the following costs to comply with this AD: ESTIMATED COSTS Action Labor cost Inspection ........ Up to 9 work-hours × $85 per hour = up to $765 per inspection cycle. We have received no definitive data that enables us to provide cost estimates for the on-condition actions specified in this AD. jstallworth on DSKBBY8HB2PROD with RULES 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. This AD is issued in accordance with authority delegated by the Executive Director, Aircraft Certification Service, as authorized by FAA Order 8000.51C. In accordance with that order, issuance of ADs is normally a function of the Compliance and Airworthiness Division, but during this transition period, the Executive Director has delegated the authority to issue ADs applicable to transport category airplanes to the Director of the System Oversight Division. VerDate Sep<11>2014 15:23 Nov 27, 2017 Jkt 244001 Cost per product Parts cost $0 Cost on U.S. operators Up to $765 per inspection cycle. Regulatory Findings § 39.13 This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Is not a ‘‘significant rule’’ under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (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. Up to $360,315 per inspection cycle. ■ List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. Frm 00007 Fmt 4700 Sfmt 4700 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): 2017–24–05 The Boeing Company: Amendment 39–19109; Docket No. FAA–2017–0526; Product Identifier 2017–NM–026–AD. (a) Effective Date This AD is effective January 2, 2018. (b) Affected ADs None. (c) Applicability (1) This AD applies to all The Boeing Company Model 737–100, –.200, –.200C, –.300, –.400, and –.500 series airplanes, certificated in any category. (2) Installation of Supplemental Type Certificate (STC) ST01219SE (http:// rgl.faa.gov/Regulatory_and_Guidance_ Library/rgstc.nsf/0/ 48e13cdfbbc32cf4862576a4005d308b/$FILE/ ST01219SE.pdf) does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST01219SE is installed, a ‘‘change in product’’ alternative method of compliance (AMOC) approval request is not necessary to comply with the requirements of 14 CFR 39.17. (d) Subject Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PO 00000 [Amended] Air Transport Association (ATA) of America Code 57; Wings. (e) Unsafe Condition This AD was prompted by reports of cracking in the upper aft skin at the rear spar of the wings. We are issuing this AD to detect and correct cracks in the upper aft skin of the wings, which could result in the inability of a principal structural element to sustain limit load, and consequent reduced structural integrity of the airplane. E:\FR\FM\28NOR1.SGM 28NOR1 56158 Federal Register / Vol. 82, No. 227 / Tuesday, November 28, 2017 / Rules and Regulations (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) For Group 1 Airplanes: Inspection and Corrective Actions For airplanes identified as Group 1 in Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017: Within 120 days after the effective date of this AD, do an inspection for cracking of the upper aft skin of the wings, and do all applicable corrective actions, using a method approved in accordance with the procedures specified in paragraph (j) of this AD. (h) For Groups 2 and 3 Airplanes: Repetitive Inspections and Repair For Groups 2 and 3 airplanes identified in Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017: At the applicable time specified in paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017, except as required by paragraph (i) of this AD, do the applicable inspection for cracking of the upper aft skin of the wings from wing buttock line (WBL) 159 to WBL 220, in accordance with the Work Instructions of Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017. If any cracking is found, repair before further flight, in accordance with the procedures specified in paragraph (j) of this AD. Repeat the inspection thereafter at the applicable time specified in paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017. jstallworth on DSKBBY8HB2PROD with RULES (i) Exceptions to the Service Information (1) Where Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017, specifies a compliance time ‘‘after the original issue date of this service bulletin,’’ paragraph (h) of this AD requires compliance within the specified compliance time after the effective date of this AD. (2) Although Boeing Alert Service Bulletin 737–57A1329, dated January 16, 2017, specifies to contact Boeing for repair instructions, and specifies that action as ‘‘RC’’ (Required for Compliance), this AD requires repair in accordance with the procedures specified in paragraph (j) of this AD. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, Los Angeles ACO Branch, 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 certification office, send it to the attention of the person identified in paragraph (k) of this AD. Information may be emailed to: 9-ANMLAACO-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. VerDate Sep<11>2014 15:23 Nov 27, 2017 Jkt 244001 (3) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by the Boeing Commercial Airplanes Organization Designation Authorization (ODA) that has been authorized by the Manager, Los Angeles ACO Branch, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD. (4) Except as required by paragraph (i)(2) of this AD: For service information that contains steps that are labeled as RC, the provisions of paragraphs (j)(4)(i) and (j)(4)(ii) of this AD apply. (i) The steps labeled as RC, including substeps under an RC step and any figures identified in an RC step, must be done to comply with the AD. If a step or substep is labeled ‘‘RC Exempt,’’ then the RC requirement is removed from that step or substep. An AMOC is required for any deviations to RC steps, including substeps and identified figures. (ii) Steps not labeled as RC may be deviated from using accepted methods in accordance with the operator’s maintenance or inspection program without obtaining approval of an AMOC, provided the RC steps, including substeps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition. Issued in Renton, Washington, on November 15, 2017. Chris Spangenberg, Acting Director, System Oversight Division, Aircraft Certification Service. [FR Doc. 2017–25379 Filed 11–27–17; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2017–0478; Product Identifier 2016–NM–174–AD; Amendment 39–19087; AD 2017–22–07] RIN 2120–AA64 Airworthiness Directives; Airbus Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for certain Airbus Model A319 series airplanes; Model A320–211, –212, –214, –231, –232, and –233 airplanes; and Model (k) Related Information A321–111, –112, –131, –211, –212, For more information about this AD, contact Payman Soltani, Aerospace Engineer, –213, –231, and –232 airplanes. This AD was prompted by a report of cracks on Airframe Section, FAA, Los Angeles ACO frame forks and outer skin on the Branch, 3960 Paramount Boulevard, Lakewood, CA 90712–4137; phone: 562–627– forward and aft cargo compartment 5313; fax: 562–627–5210; email: doors. This AD requires repetitive payman.soltani@faa.gov. inspections of the frame forks, and corrective actions if necessary. This AD (l) Material Incorporated by Reference also includes optional modifications (1) The Director of the Federal Register that constitute terminating action. We approved the incorporation by reference are issuing this AD to address the unsafe (IBR) of the service information listed in this condition on these products. paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. DATES: This AD is effective January 2, (2) You must use this service information 2018. as applicable to do the actions required by The Director of the Federal Register this AD, unless the AD specifies otherwise. approved the incorporation by reference (i) Boeing Alert Service Bulletin 737– of certain publications listed in this AD 57A1329, dated January 16, 2017. as of January 2, 2018. (ii) Reserved. (3) For service information identified in ADDRESSES: For service information this AD, contact Boeing Commercial identified in this final rule, contact Airplanes, Attention: Contractual & Data Airbus, Airworthiness Office—EIAS, Services (C&DS), 2600 Westminster Blvd., 1 Rond Point Maurice Bellonte, 31707 MC 110–SK57, Seal Beach, CA 90740; Blagnac Cedex, France; telephone: +33 5 telephone 562–797–1717; Internet https:// 61 93 36 96; fax: +33 5 61 93 44 51; www.myboeingfleet.com. email: account.airworth-eas@ (4) You may view this service information airbus.com; Internet: http:// at the FAA, Transport Standards Branch, 1601 Lind Avenue SW., Renton, WA. For www.airbus.com. You may view this information on the availability of this referenced service information at the material at the FAA, call 425–227–1221. FAA, Transport Standards Branch, 1601 (5) You may view this service information Lind Avenue SW., Renton, WA. For that is incorporated by reference at the information on the availability of this National Archives and Records material at the FAA, call 425–227–1221. Administration (NARA). For information on the availability of this material at NARA, call It is also available on the Internet at http://www.regulations.gov by searching 202–741–6030, or go to: http:// for and locating Docket No. FAA–2017– www.archives.gov/federal-register/cfr/ibrlocations.html. 0478. PO 00000 Frm 00008 Fmt 4700 Sfmt 4700 SUMMARY: E:\FR\FM\28NOR1.SGM 28NOR1

Agencies

[Federal Register Volume 82, Number 227 (Tuesday, November 28, 2017)]
[Rules and Regulations]
[Pages 56156-56158]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-25379]



[[Page 56156]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0526; Product Identifier 2017-NM-026-AD; Amendment 
39-19109; AD 2017-24-05]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for all The 
Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series 
airplanes. This AD was prompted by reports of cracking in the upper aft 
skin at the rear spar of the wings. This AD requires repetitive 
inspections for cracking of the upper aft skin of the wings, and repair 
if necessary. We are issuing this AD to address the unsafe condition on 
these products.

DATES: This AD is effective January 2, 2018.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of January 2, 
2018.

ADDRESSES: For service information identified in this final rule, 
contact Boeing Commercial Airplanes, Attention: Contractual & Data 
Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 
90740; telephone 562-797-1717; Internet https://www.myboeingfleet.com. 
You may view this service information at the FAA, Transport Standards 
Branch, 1601 Lind Avenue SW., Renton, WA. For information on the 
availability of this material at the FAA, call 425-227-1221. It is also 
available on the Internet at http://www.regulations.gov by searching 
for and locating Docket No. FAA-2017-0526.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2017-
0526; 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 final rule, the regulatory evaluation, any comments 
received, and other information. The address for the Docket Office 
(phone: 800-647-5527) is Docket Management Facility, U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Payman Soltani, Aerospace Engineer, 
Airframe Section, FAA, Los Angeles ACO Branch, 3960 Paramount 
Boulevard, Lakewood, CA 90712-4137; phone: 562-627-5313; fax: 562-627-
5210; email: payman.soltani@faa.gov.

SUPPLEMENTARY INFORMATION: 

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 by adding an AD that would apply to all The Boeing Company 
Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. The 
NPRM published in the Federal Register on June 5, 2017 (82 FR 25744). 
The NPRM was prompted by reports of cracking in the upper aft skin at 
the rear spar of the wings. The NPRM proposed to require repetitive 
inspections for cracking of the upper aft skin of the wings, and repair 
if necessary.

Comments

    We gave the public the opportunity to participate in developing 
this final rule. The following presents the comments received on the 
NPRM and the FAA's response to each comment.

Effect of Winglets on Accomplishment of the Proposed Actions

    Aviation Partners Boeing (APB) stated that the installation of 
winglets per Supplemental Type Certificate (STC) ST01219SE does not 
affect the accomplishment of the manufacturer's service instructions.
    Southwest Airlines requested clarification that additional 
alternative method of compliance (AMOC) approvals are not necessary 
during accomplishment of the actions specified in Boeing Alert Service 
Bulletin 737-57A1329, dated January 16, 2017, if the installation of 
winglets was done using STC ST01219SE.
    We agree with the commenters' statements. We have redesignated 
paragraph (c) of the proposed AD as paragraph (c)(1) of this AD and 
added paragraph (c)(2) to this AD to state that installation of STC 
ST01219SE does not affect the ability to accomplish the actions 
required by this AD. Therefore, for airplanes on which STC ST01219SE is 
installed, a ``change in product'' AMOC approval request is not 
necessary to comply with the requirements of 14 CFR 39.17.

Request To Revise Certain Corrective Action Requirements

    All Nippon Airways (ANA) asked that we revise paragraph (h) of the 
proposed AD to change the compliance method for crack repair to allow 
use of the Boeing 737-500 Structural Repair Manual (SRM) 57-20-10, 
Repair 7. ANA stated that Boeing has already developed the repair 
procedure for the outer wing upper aft skin at the trailing edge 
between wing buttock line (WBL) 160 and WBL 205, as specified in Boeing 
737-500 SRM 57-20-10, Repair 7. ANA added that the repair procedure is 
applicable to part of an inspection area specified in Boeing Alert 
Service Bulletin 737-57A1329, dated January 16, 2017. ANA noted that 
its request should be considered to reduce AMOC requests.
    We disagree with the request. Boeing has indicated that Repair 7 of 
the SRM is currently being revised. We do not consider that delaying 
this rulemaking until release of the revised service information is 
warranted. However, under the provisions of paragraph (j) of this AD, 
we will consider requests for approval of alternative service 
information if sufficient data are submitted to substantiate that the 
service information would provide an acceptable level of safety. Boeing 
has indicated it intends to request approval of a global AMOC for the 
revised service information after this AD is published. Therefore, we 
have made no change to this AD in this regard.

Request To Clarify Certain Requirements

    Boeing asked that paragraph (g) of the proposed AD, and the heading 
for paragraph (g), be changed to include ``corrective actions'' to 
clarify that corrective actions may be required.
    We agree with the commenter's request. We have revised paragraph 
(g) of this AD accordingly.
    Boeing also asked that the header for paragraph (h) of the proposed 
AD be changed to remove ``repetitive'' because merely specifying 
``inspections'' addresses both initial and repetitive inspections.
    We agree to clarify the terminology in the header for paragraph (h) 
of this AD. We do not presume that the term ``repetitive'' necessarily 
excludes the initial action. An action cannot be repeated without 
accomplishment of the initial action. Many existing ADs use the term 
``repetitive'' actions, which we intend as including the initial 
action. Therefore, we have not changed this AD regarding this issue.

[[Page 56157]]

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
this final rule with the changes described previously and minor 
editorial changes. We have determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM for correcting the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.
    We also determined that these changes will not increase the 
economic burden on any operator or increase the scope of this final 
rule.

Related Service Information Under 1 CFR Part 51

    We reviewed Boeing Alert Service Bulletin 737-57A1329, dated 
January 16, 2017. The service information describes procedures for 
repetitive surface high frequency eddy current inspections, low 
frequency eddy current inspections, and detailed inspections on 
airplanes with or without an external repair, for cracking of the upper 
aft skin from WBL 159 to WBL 220. This service information is 
reasonably available because the interested parties have access to it 
through their normal course of business or by the means identified in 
the ADDRESSES section.

Costs of Compliance

    We estimate that this AD affects 471 airplanes of U.S. registry. We 
estimate the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                Cost on U.S.
         Action                   Labor cost            Parts cost      Cost per product          operators
----------------------------------------------------------------------------------------------------------------
Inspection..............  Up to 9 work-hours x $85                $0  Up to $765 per        Up to $360,315 per
                           per hour = up to $765 per                   inspection cycle.     inspection cycle.
                           inspection cycle.
----------------------------------------------------------------------------------------------------------------

    We have received no definitive data that enables us to provide cost 
estimates for the on-condition actions specified in this AD.

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.
    This AD is issued in accordance with authority delegated by the 
Executive Director, Aircraft Certification Service, as authorized by 
FAA Order 8000.51C. In accordance with that order, issuance of ADs is 
normally a function of the Compliance and Airworthiness Division, but 
during this transition period, the Executive Director has delegated the 
authority to issue ADs applicable to transport category airplanes to 
the Director of the System Oversight Division.

Regulatory Findings

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

Adoption of the Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

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

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


Sec.  39.13   [Amended]

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

2017-24-05 The Boeing Company: Amendment 39-19109; Docket No. FAA-
2017-0526; Product Identifier 2017-NM-026-AD.

(a) Effective Date

    This AD is effective January 2, 2018.

(b) Affected ADs

    None.

(c) Applicability

    (1) This AD applies to all The Boeing Company Model 737-100, 
-.200, -.200C, -.300, -.400, and -.500 series airplanes, 
certificated in any category.
    (2) Installation of Supplemental Type Certificate (STC) 
ST01219SE (http://rgl.faa.gov/Regulatory_and_Guidance_Library/
rgstc.nsf/0/48e13cdfbbc32cf4862576a4005d308b/$FILE/ST01219SE.pdf) 
does not affect the ability to accomplish the actions required by 
this AD. Therefore, for airplanes on which STC ST01219SE is 
installed, a ``change in product'' alternative method of compliance 
(AMOC) approval request is not necessary to comply with the 
requirements of 14 CFR 39.17.

(d) Subject

    Air Transport Association (ATA) of America Code 57; Wings.

(e) Unsafe Condition

    This AD was prompted by reports of cracking in the upper aft 
skin at the rear spar of the wings. We are issuing this AD to detect 
and correct cracks in the upper aft skin of the wings, which could 
result in the inability of a principal structural element to sustain 
limit load, and consequent reduced structural integrity of the 
airplane.

[[Page 56158]]

(f) Compliance

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

(g) For Group 1 Airplanes: Inspection and Corrective Actions

    For airplanes identified as Group 1 in Boeing Alert Service 
Bulletin 737-57A1329, dated January 16, 2017: Within 120 days after 
the effective date of this AD, do an inspection for cracking of the 
upper aft skin of the wings, and do all applicable corrective 
actions, using a method approved in accordance with the procedures 
specified in paragraph (j) of this AD.

(h) For Groups 2 and 3 Airplanes: Repetitive Inspections and Repair

    For Groups 2 and 3 airplanes identified in Boeing Alert Service 
Bulletin 737-57A1329, dated January 16, 2017: At the applicable time 
specified in paragraph 1.E., ``Compliance,'' of Boeing Alert Service 
Bulletin 737-57A1329, dated January 16, 2017, except as required by 
paragraph (i) of this AD, do the applicable inspection for cracking 
of the upper aft skin of the wings from wing buttock line (WBL) 159 
to WBL 220, in accordance with the Work Instructions of Boeing Alert 
Service Bulletin 737-57A1329, dated January 16, 2017. If any 
cracking is found, repair before further flight, in accordance with 
the procedures specified in paragraph (j) of this AD. Repeat the 
inspection thereafter at the applicable time specified in paragraph 
1.E., ``Compliance,'' of Boeing Alert Service Bulletin 737-57A1329, 
dated January 16, 2017.

(i) Exceptions to the Service Information

    (1) Where Boeing Alert Service Bulletin 737-57A1329, dated 
January 16, 2017, specifies a compliance time ``after the original 
issue date of this service bulletin,'' paragraph (h) of this AD 
requires compliance within the specified compliance time after the 
effective date of this AD.
    (2) Although Boeing Alert Service Bulletin 737-57A1329, dated 
January 16, 2017, specifies to contact Boeing for repair 
instructions, and specifies that action as ``RC'' (Required for 
Compliance), this AD requires repair in accordance with the 
procedures specified in paragraph (j) of this AD.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Los Angeles ACO Branch, 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 certification office, send it to the attention of 
the person identified in paragraph (k) of this AD. Information may 
be emailed to: 9-ANM-LAACO-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, modification, or alteration required by this AD 
if it is approved by the Boeing Commercial Airplanes Organization 
Designation Authorization (ODA) that has been authorized by the 
Manager, Los Angeles ACO Branch, to make those findings. To be 
approved, the repair method, modification deviation, or alteration 
deviation must meet the certification basis of the airplane, and the 
approval must specifically refer to this AD.
    (4) Except as required by paragraph (i)(2) of this AD: For 
service information that contains steps that are labeled as RC, the 
provisions of paragraphs (j)(4)(i) and (j)(4)(ii) of this AD apply.
    (i) The steps labeled as RC, including substeps under an RC step 
and any figures identified in an RC step, must be done to comply 
with the AD. If a step or substep is labeled ``RC Exempt,'' then the 
RC requirement is removed from that step or substep. An AMOC is 
required for any deviations to RC steps, including substeps and 
identified figures.
    (ii) Steps not labeled as RC may be deviated from using accepted 
methods in accordance with the operator's maintenance or inspection 
program without obtaining approval of an AMOC, provided the RC 
steps, including substeps and identified figures, can still be done 
as specified, and the airplane can be put back in an airworthy 
condition.

(k) Related Information

    For more information about this AD, contact Payman Soltani, 
Aerospace Engineer, Airframe Section, FAA, Los Angeles ACO Branch, 
3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-
5313; fax: 562-627-5210; email: payman.soltani@faa.gov.

(l) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) Boeing Alert Service Bulletin 737-57A1329, dated January 16, 
2017.
    (ii) Reserved.
    (3) For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Contractual & Data Services 
(C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740; 
telephone 562-797-1717; Internet https://www.myboeingfleet.com.
    (4) You may view this service information at the FAA, Transport 
Standards Branch, 1601 Lind Avenue SW., Renton, WA. For information 
on the availability of this material at the FAA, call 425-227-1221.
    (5) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Renton, Washington, on November 15, 2017.
Chris Spangenberg,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2017-25379 Filed 11-27-17; 8:45 am]
 BILLING CODE 4910-13-P