Airworthiness Directives; The Boeing Company Airplanes, 59830-59834 [2016-20686]

Download as PDF 59830 Federal Register / Vol. 81, No. 169 / Wednesday, August 31, 2016 / Rules and Regulations (4) TR 5–2–13, dated June 4, 2014, to Part 2, Section 5–10–11, of Bombardier Global 5000 BD–700 Time Limits/Maintenance Checks (for Model BD–700–1A11 airplanes). (5) TR 5–2–44, dated June 4, 2014, to Part 2, Section 5–10–11, of Bombardier Global Express BD–700 Time Limits/Maintenance Checks (for Model BD–700–1A10 airplanes). (h) No Alternative Actions and Intervals After accomplishing the revision required by paragraph (g) of this AD, no alternative actions (e.g., inspections) and intervals may be used unless the actions and intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k)(1) of this AD. (i) Replacement For airplanes identified in section 1.A., ‘‘Effectivity,’’ of Bombardier Global 5000 Service Bulletin 700–1A11–52–023, dated October 4, 2013; or Bombardier Global Express/Global Express XRS Service Bulletin 700–52–046, dated October 4, 2013; except as provided by paragraph (j)(1) or (j)(2) of this AD: Within 15 months after the effective date of this AD, but not exceeding the applicable life limit of the passenger tensator spring identified in the applicable TR specified in paragraphs (g)(1) through (g)(5) of this AD, replace the passenger door tensator springs having part number (P/N) GS321–0580–1, with new springs, in accordance with the Accomplishment Instructions of Bombardier Global 5000 Service Bulletin 700–1A11–52– 023, dated October 4, 2013; or Bombardier Global Express/Global Express XRS Service Bulletin 700–52–046, dated October 4, 2013; as applicable. ehiers on DSK5VPTVN1PROD with RULES (j) Acceptable Alternative Actions for Paragraph (i) of This AD (1) For airplanes having serial numbers (S/ N) 9278 through 9360 inclusive: Replacement of the passenger door tensator springs having P/N GS321–0580–1 with new springs before the effective date of this AD is acceptable for compliance with the requirements of paragraph (i) of this AD. Refer to the task specified in the applicable TRs identified in paragraphs (g)(1) through (g)(5) of this AD for subsequent spring replacements. (2) For airplanes with serial numbers other than those identified in paragraph (j)(1) of this AD: Accomplishment after the effective date of this AD of the ‘‘Time Limits/ Maintenance Checks’’ discard task identified in the applicable service information specified in paragraphs (g)(1) through (g)(5) of this AD is acceptable for compliance with the requirements of paragraph (i) of this AD. (k) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York Aircraft Certification Office (ACO), ANE–170, 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 New York ACO, send it to VerDate Sep<11>2014 14:15 Aug 30, 2016 Jkt 238001 ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone: 516–228–7300; fax: 516–794–5531. 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. The AMOC approval letter must specifically reference this AD. (2) Contacting the Manufacturer: For any requirement in this AD to obtain corrective actions from a manufacturer, the action must be accomplished using a method approved by the Manager, New York ACO, ANE–170, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.’s TCCA Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. 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: https:// www.archives.gov/federal-register/cfr/ibrlocations.html. (l) Related Information Refer to Mandatory Continuing Airworthiness Information (MCAI) Canadian AD CF–2014–39, dated November 4, 2014, for related information. This MCAI may be found in the AD docket on the Internet at https://www.regulations.gov by searching for and locating Docket No. FAA–2016–3989. DEPARTMENT OF TRANSPORTATION (m) 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 this AD specifies otherwise. (i) Temporary Revision 5–2–7, dated June 4, 2014, to Part 2, Section 5–10–11, of Bombardier Global Express XRS BD–700 Time Limits/Maintenance Checks. (ii) Temporary Revision 5–2–10, dated September 9, 2014, to Part 2, Section 5–10– 11, of Bombardier Global 5000 GL 5000 Featuring Global Vision Flight Deck—Time Limits/Maintenance Checks. (iii) Temporary Revision 5–2–10, dated September 9, 2014, to Part 2, Section 5–10– 11, of Bombardier Global 6000 GL 6000 Time Limits/Maintenance Checks. (iv) Temporary Revision 5–2–13, dated June 4, 2014, to Part 2, Section 5–10–11, of Bombardier Global 5000 BD–700 Time Limits/Maintenance Checks. (v) Temporary Revision 5–2–44, dated June 4, 2014, to Part 2, Section 5–10–11, of Bombardier Global Express BD–700 Time Limits/Maintenance Checks. (vi) Bombardier Global Express/Global Express XRS Service Bulletin 700–52–046, dated October 4, 2013. (vii) Bombardier Global 5000 Service Bulletin 700–1A11–52–023, dated October 4, 2013. (3) For service information identified in ˆ this AD, contact Bombardier, Inc., 400 Cote´ Vertu Road West, Dorval, Quebec H4S 1Y9, Canada; telephone 514–855–5000; fax 514– 855–7401; email thd.crj@ aero.bombardier.com; Internet https:// www.bombardier.com. (4) You may view this service information at the FAA, Transport Airplane Directorate, PO 00000 Frm 00004 Fmt 4700 Sfmt 4700 Issued in Renton, Washington, on August 18, 2016. Dorr M. Anderson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2016–20693 Filed 8–30–16; 8:45 am] BILLING CODE 4910–13–P Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2015–8133; Directorate Identifier 2015–NM–101–AD; Amendment 39–18631; AD 2016–18–01] 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 certain The Boeing Company Model 737–600, –700, –700C, –800, –900, and –900ER series airplanes. This AD was prompted by reports of heavy corrosion and chrome damage on the forward and aft trunnion pin assemblies of the right and left main landing gears (MLGs). This AD requires repetitive lubrication of the forward and aft trunnion pin assemblies of the right and left MLGs; repetitive inspections of these assemblies for corrosion and chrome damage, and related investigative and corrective actions if necessary; and installation of new or modified trunnion pin assembly components, which will terminate the repetitive lubrication and repetitive inspections. We are issuing this AD to detect and correct heavy corrosion and chrome damage on the forward and aft trunnion pin assemblies of the right and left MLGs, which could result in cracking of these assemblies and collapse of the MLGs. DATES: This AD is effective October 5, 2016. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of October 5, 2016. SUMMARY: E:\FR\FM\31AUR1.SGM 31AUR1 Federal Register / Vol. 81, No. 169 / Wednesday, August 31, 2016 / Rules and Regulations For service information identified in this final rule, 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 view this referenced service information at the FAA, Transport Airplane Directorate, 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 https:// www.regulations.gov by searching for and locating Docket No. FAA–2015– 8133. actions if necessary; and installation of new or modified trunnion pin assembly components, which would terminate the repetitive lubrication and repetitive inspections. We are issuing this AD to detect and correct heavy corrosion and chrome damage on the forward and aft trunnion pin assemblies of the right and left MLGs, which could result in cracking of these assemblies and collapse of the MLGs. Examining the AD Docket You may examine the AD docket on the Internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2015– 8133; 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 AD, 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: Alan Pohl, Aerospace Engineer, Airframe Branch, ANM–120S, FAA Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, WA 98057–3356; phone: 425–917–6450; fax: 425–917–6590; email: alan.pohl@ faa.gov. Support for the NPRM Boeing stated that it concurs with the contents of the NPRM. ADDRESSES: ehiers on DSK5VPTVN1PROD with RULES 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 certain The Boeing Company Model 737–600, –700, –700C, –800, –900, and –900ER series airplanes. The NPRM published in the Federal Register on December 31, 2015 (80 FR 81795) (‘‘the NPRM’’). The NPRM was prompted by reports of heavy corrosion and chrome damage on the forward and aft trunnion pin assemblies of the right and left MLGs. The NPRM proposed to require repetitive lubrication of the forward and aft trunnion pin assemblies of the right and left MLGs; repetitive inspections of these assemblies for corrosion and chrome damage, and related investigative and corrective VerDate Sep<11>2014 14:15 Aug 30, 2016 Jkt 238001 Comments We gave the public the opportunity to participate in developing this AD. 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 stated that accomplishing Supplemental Type Certificate (STC) ST00830SE does not affect the accomplishment of the actions specified in the NPRM. We concur with the commenter. We have redesignated paragraph (c) of the proposed AD as paragraph (c)(1) and added new paragraph (c)(2) in this AD to state that installation of STC ST00830SE does not affect the ability to accomplish the actions required by this final rule. Therefore, for airplanes on which STC ST00830SE 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. Request for Clarification of Requirements Delta Airlines (DAL) requested an explanation of how the requirements are different between AD 2014–08–11, Amendment 39–17835 (79 FR 23903, April 29, 2014) (‘‘AD 2014–08–11’’) and the NPRM. DAL noted that the requirements of AD 2014–08–11 include an inspection for discrepancies of the transition radius of the MLG forward trunnion pins, and corrective actions if necessary. DAL elaborated that this inspection is for finish damage (scrapes through primer), signs of corrosion, pitting, and scratches in the base metal of that area. DAL pointed out that the NPRM requires a general visual inspection of the MLG forward trunnion pin assembly for signs of corrosion or chrome plating damage, and if either condition is found, a detailed inspection of the forward trunnion pin assembly is required. DAL mentioned that the detailed inspection requires verification PO 00000 Frm 00005 Fmt 4700 Sfmt 4700 59831 that a new seal and retainer configuration is installed, and if the overhaul limits exceed what is specified in the component maintenance manual, replacement of the forward trunnion pin assembly is necessary. DAL reasoned that the forward trunnion pin inspections required by AD 2014–08–11 should be superseded by the proposed forward trunnion pin inspections in the NPRM. DAL stated that the detailed inspection proposed in the NPRM has additional corrective actions if any loose or missing chrome plating is found, beyond what is required in AD 2014– 08–11. DAL also conveyed that the inspections for signs of corrosion are the same in the NPRM and AD 2014–08–11. We agree to provide clarification regarding how the requirements are different between the requirements in the proposed AD and the requirements mandated by AD 2014–08–11. The applicability of the proposed AD includes certain The Boeing Company Model 737–600, –700, –700C, –800, –900, and –900ER series airplanes, line numbers 1 through 3526 inclusive. The applicability of AD 2014–08–11 includes certain The Boeing Company Model 737–600, –700, –700C, –800, –900, and –900ER series airplanes, line numbers 1423 through 3526 inclusive. Although certain airplane line numbers are included in the applicability of both the proposed AD and AD 2014–08–11, the issues addressed by the NPRM and AD 2014–08–11 are not the same. Furthermore, the inspection instructions in the service information required for accomplishing the actions in the proposed AD are different from the inspection instructions in the service information required by AD 2014–08– 11. The inspections in the proposed AD focus on chrome damage and corrosion on the shank of the forward trunnion pins, and the inspections required by AD 2014–08–11 focus on finish scratches and corrosion in the transition radius of the forward trunnion pins. We have not changed this AD regarding this issue. In addition, we note that the service information required to do the actions required by AD 2014–08–11 (which cites Boeing Special Attention Service Bulletin 737–32–1402, Revision 1, dated February 7, 2013), includes a recommendation by Boeing that operators accomplish the specified actions concurrently with the actions specified in Boeing Special Attention Service Bulletin 737–32–1448 (Boeing Special Attention Service Bulletin 737– 32–1448, Revision 1, dated May 29, 2015, is the appropriate source of service information for accomplishing the actions required by this AD). E:\FR\FM\31AUR1.SGM 31AUR1 59832 Federal Register / Vol. 81, No. 169 / Wednesday, August 31, 2016 / Rules and Regulations Likewise, Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015, includes a recommendation by Boeing that operators accomplish the specified actions concurrently with the actions specified in Boeing Special Attention Service Bulletin 737–32–1402. Request for Clarification of Lube Fittings Location DAL requested clarification regarding the location of the lube fittings for the forward and aft MLG trunnion pin assemblies in paragraph (g) of the NPRM. DAL commented that the NPRM stated to do the repetitive lubrication in accordance with Work Package 1 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737– 32–1448, Revision 1, dated May 29, 2015. DAL noted that Work Package 1 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015, refers to section 12–21– 11 of the Boeing 737–600/700/800/900 Aircraft Maintenance Manual (AMM) as an accepted procedure for the repetitive lubrication of the MLG trunnion pin assemblies. DAL stated that section 12– 21–11 of the AMM specifically identifies the locations of the trunnion bearing housing and the aft trunnion bearing, but does not specifically identify the locations of the two lube fittings for the forward and aft trunnion pins. We agree with the commenter that the two lube fittings for the forward and aft trunnion pins are not specifically mentioned in section 12–21–11 of the Boeing 737–600/700/800/900 AMM. These locations are identified as Item [6], ‘‘Outer Cylinder,’’ on page 307 of the AMM. However, there are only three lube fittings associated with Item [6], so it is possible to determine which two fittings are to be used for lubricating the forward and aft trunnion pins. We consulted with Boeing and confirmed that the two lube fittings are located on the bottom of the outer cylinder trunnion, directly under the pins. We have not changed this AD regarding this issue. Request for Clarification of Corrective Actions in Paragraph (h) of the Proposed AD DAL requested clarification of certain corrective actions in paragraph (h) of the proposed AD. DAL asked if an operator can replace an affected trunnion pin assembly instead of overhauling it. DAL pointed out that neither the NPRM nor Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015, specify the part number of the replacement trunnion pin assembly. DAL asked if an operator can replace an affected pin assembly with any properly approved pin assembly using the Boeing 737 Aircraft Illustrated Parts Catalog, Boeing Drawing 161A0002, ‘‘Boeing Model 737–NG Main Landing Gear Component Interchangeability List,’’ or a similar document. We agree with the commenter’s request for clarification. Operators may elect to replace a trunnion pin assembly with a serviceable unit in lieu of performing an overhaul. However, operators should be aware that some of the existing trunnion pin assemblies require modification. Figures 9, 11, and 12 of Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015, provide instructions for modifying certain pin assemblies. Note (c) in each of these figures refers to paragraph 2.C.3., ‘‘Parts Modified and Reidentified,’’ of Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015, which shows the existing and modified part numbers. For use of other part numbers, such as those identified in the Boeing 737 Aircraft Illustrated Parts Catalog or Boeing Drawing 161A0002, ‘‘Boeing Model 737–NG Main Landing Gear Component Interchangeability List,’’ operators may request an alternative method of compliance in accordance with the procedures specified in paragraph (m) of this AD. We have not changed this AD regarding this issue. Conclusion We reviewed the relevant data, considered the comments received, and determined that air safety and the public interest require adopting this AD 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 AD. Related Service Information Under 1 CFR Part 51 We reviewed Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015. The service information describes procedures for lubricating the forward and aft trunnion pin assemblies on the left and right MLGs, inspecting the forward and aft trunnion pin assemblies for corrosion or damage, and performing corrective actions. In addition, the service information describes procedures for installing a new forward trunnion pin housing assembly, seal, and retainer configuration. 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 1,023 airplanes of U.S. registry. We estimate the following costs to comply with this AD: ESTIMATED COSTS Action Labor cost ehiers on DSK5VPTVN1PROD with RULES Lubrication ...................................... Inspection (Groups 1 and 2, Configuration 1 airplanes). Inspection (Group 3 airplanes) ....... Replacement/overhaul (Groups 1 and 2 airplanes). Replacement/overhaul (Group 3 airplanes). VerDate Sep<11>2014 14:15 Aug 30, 2016 2 work-hours × $85 per hour $170, per lubrication cycle. 51 work-hours × $85 per hour $4,335, per inspection cycle. 93 work-hours × $85 per hour $7,905, per inspection cycle. 84 work-hours × $85 per hour $7,140. 86 work-hours × $85 per hour $7,310. Jkt 238001 PO 00000 Frm 00006 Cost per product Parts cost Cost on U.S. operators = $0 $170 = 0 4,335 = 0 7,905 = 0 7,140 $173,910, per lubrication cycle (1,023 airplanes). 4,282,980, per inspection cycle (988 airplanes). 276,675, per inspection cycle (35 airplanes). 7,054,320 (988 airplanes). = 0 7,310 255,850 (35 airplanes). Fmt 4700 Sfmt 4700 E:\FR\FM\31AUR1.SGM 31AUR1 Federal Register / Vol. 81, No. 169 / Wednesday, August 31, 2016 / Rules and Regulations We have received no definitive data that would enable us to provide cost estimates for the on-condition actions specified in this AD. PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority for This Rulemaking Authority: 49 U.S.C. 106(g), 40113, 44701. 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 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. ehiers on DSK5VPTVN1PROD with RULES 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: VerDate Sep<11>2014 14:15 Aug 30, 2016 Jkt 238001 § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ 2016–18–01 The Boeing Company: Amendment 39–18631; Docket No. FAA–2015–8133; Directorate Identifier 2015–NM–101–AD. (a) Effective Date This AD is effective October 5, 2016. (b) Affected ADs None. (c) Applicability (1) This AD applies to certain The Boeing Company Model 737–600, –700, –700C, –800, –900, and –900ER series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015. (2) Installation of Supplemental Type Certificate (STC) ST00830SE (https:// rgl.faa.gov/Regulatory_and_Guidance_ Library/rgstc.nsf/0/184DE9A71EC3FA55862 57EAE00707DA6?OpenDocument&Highlight =st00830se) does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST00830SE 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 32, Landing Gear. (e) Unsafe Condition This AD was prompted by reports of heavy corrosion and chrome damage of the forward and aft trunnion pin assemblies of the right and left main landing gears (MLGs). We are issuing this AD to detect and correct heavy corrosion and chrome damage of the forward and aft trunnion pin assemblies of the right and left MLGs, which could result in cracking of these assemblies and collapse of the MLGs. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Repetitive Lubrication of MLG Trunnion Pin Assemblies For airplanes in Groups 1 and 2, Configuration 1, and airplanes in Group 3, as identified in Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015: Except as required by paragraph (k) of this AD, at the applicable time specified in Table 1 or Table 2 of paragraph 1.E., ‘‘Compliance,’’ of Boeing PO 00000 Frm 00007 Fmt 4700 Sfmt 4700 59833 Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015, lubricate the forward and aft trunnion pin assemblies of the left and right MLGs, in accordance with Work Package 1 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015. Repeat the lubrication thereafter at intervals not to exceed those specified in paragraph 1.E., ‘‘Compliance,’’ of Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015. Accomplishment of the actions specified in paragraph (i) of this AD terminates the repetitive lubrication required by this paragraph. (h) Repetitive Inspections, Corrective Actions, and Lubrication For airplanes in Groups 1 and 2, Configuration 1, and airplanes in Group 3, as identified in Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015: Except as required by paragraph (k) of this AD, at the applicable time specified in Table 1 or Table 2 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015, do a general visual inspection of the left and right MLGs at the forward and aft trunnion pin locations and the visible surfaces of the forward and aft trunnion pin assemblies for signs of corrosion or chrome plating damage and lubricate the forward and aft trunnion pin assemblies, in accordance with Work Package 2 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015. Repeat the general visual inspection thereafter at intervals not to exceed those specified in paragraph 1.E., ‘‘Compliance,’’ of Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015. If any discrepancy is found during any inspection required by this paragraph, before further flight, do all applicable related investigative and corrective actions in accordance with Work Package 2 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737 32–1448, Revision 1, dated May 29, 2015. Accomplishment of the actions required by paragraph (i) of this AD terminates the repetitive inspections required by this paragraph. (i) Modification of MLG Trunnion Pin Assemblies For airplanes in Groups 1 and 2, Configuration 1, and airplanes in Group 3, as identified in Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015: Except as required by paragraph (k) of this AD, at the applicable time specified in Table 1 or Table 2 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015, modify and lubricate the left and right MLG trunnion pin assemblies, and do all applicable related investigative and corrective actions, in accordance with Work Package 3 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015. E:\FR\FM\31AUR1.SGM 31AUR1 59834 Federal Register / Vol. 81, No. 169 / Wednesday, August 31, 2016 / Rules and Regulations Accomplishment of the actions in Work Package 3 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015, terminates the repetitive lubrication required by paragraph (g) of this AD and the repetitive inspections required by paragraph (h) of this AD. (j) Replacement of MLG Forward Trunnion Pin Housing Assembly, Seal, and Retainer For airplanes in Groups 1 and 2, Configuration 2, as identified in Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015: At the applicable time specified in Table 3 of paragraph 1.E., ‘‘Compliance,’’ of Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015, replace the seal, retainer, and support ring assembly with a new seal and retainer configuration; install the forward trunnion pin assembly into the housing assembly; and lubricate the forward and aft trunnion pin assemblies for the left and right MLGs; in accordance with Work Package 4 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737–32– 1448, Revision 1, dated May 29, 2015. (k) Exception to Service Information Specification Where paragraph 1.E., ‘‘Compliance,’’ of Boeing Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015, specifies a compliance time ‘‘from the original issue date on this service bulletin,’’ this AD requires compliance within the specified compliance time ‘‘after the effective date of this AD.’’ ehiers on DSK5VPTVN1PROD with RULES (l) Credit for Previous Actions This paragraph provides credit for the requirements of paragraph (g) of this AD, if those actions were performed before the effective date of this AD using Boeing Special Attention Service Bulletin 737–32–1448, dated May 19, 2011, which is not incorporated by reference in this AD. (m) 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 paragraph (n)(1) of this AD. Information 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 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, Seattle ACO VerDate Sep<11>2014 14:15 Aug 30, 2016 Jkt 238001 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. DEPARTMENT OF TRANSPORTATION (n) Related Information [Docket No. FAA–2016–9047; Directorate Identifier 2016–NM–092–AD; Amendment 39–18632; AD 2016–18–02] (1) For more information about this AD, contact Alan Pohl, Aerospace Engineer, Airframe Branch, ANM–120S, FAA Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, WA 98057–3356; phone: 425–917–6450; fax: 425–917–6590; email: alan.pohl@faa.gov. (2) Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs (o)(3) and (o)(4) of this AD. (o) 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 Special Attention Service Bulletin 737–32–1448, Revision 1, dated May 29, 2015. (ii) Reserved. (3) For 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. (4) You may view this service information at the FAA, Transport Airplane Directorate, 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: https:// www.archives.gov/federal-register/cfr/ibrlocations.html. Issued in Renton, Washington, on August 18, 2016. Dorr M. Anderson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2016–20686 Filed 8–30–16; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00008 Fmt 4700 Sfmt 4700 Federal Aviation Administration 14 CFR Part 39 RIN 2120–AA64 Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. AGENCY: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777–200 and –300ER series airplanes. This AD requires replacing the low-pressure oxygen flex hoses with new nonconductive low-pressure oxygen flex hoses in the gaseous passenger oxygen system in airplanes equipped with therapeutic oxygen. This AD was prompted by a determination that the low-pressure oxygen flex hoses in the gaseous passenger oxygen system can potentially be conductive. We are issuing this AD to prevent electrical current from passing through the lowpressure oxygen flex hoses in the gaseous passenger oxygen system, which can cause the flex hoses to melt or burn, and a consequent oxygen-fed fire in the passenger cabin. DATES: This AD is effective September 15, 2016. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of September 15, 2016]. We must receive comments on this AD by October 17, 2016. 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 final rule, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, SUMMARY: E:\FR\FM\31AUR1.SGM 31AUR1

Agencies

[Federal Register Volume 81, Number 169 (Wednesday, August 31, 2016)]
[Rules and Regulations]
[Pages 59830-59834]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-20686]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-8133; Directorate Identifier 2015-NM-101-AD; 
Amendment 39-18631; AD 2016-18-01]
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 certain 
The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER 
series airplanes. This AD was prompted by reports of heavy corrosion 
and chrome damage on the forward and aft trunnion pin assemblies of the 
right and left main landing gears (MLGs). This AD requires repetitive 
lubrication of the forward and aft trunnion pin assemblies of the right 
and left MLGs; repetitive inspections of these assemblies for corrosion 
and chrome damage, and related investigative and corrective actions if 
necessary; and installation of new or modified trunnion pin assembly 
components, which will terminate the repetitive lubrication and 
repetitive inspections. We are issuing this AD to detect and correct 
heavy corrosion and chrome damage on the forward and aft trunnion pin 
assemblies of the right and left MLGs, which could result in cracking 
of these assemblies and collapse of the MLGs.

DATES: This AD is effective October 5, 2016.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of October 5, 
2016.

[[Page 59831]]


ADDRESSES: For service information identified in this final rule, 
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 view this referenced service information 
at the FAA, Transport Airplane Directorate, 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 https://www.regulations.gov by searching for and locating Docket No. FAA-2015-
8133.

Examining the AD Docket

    You may examine the AD docket on the Internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2015-
8133; 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 AD, 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: Alan Pohl, Aerospace Engineer, 
Airframe Branch, ANM-120S, FAA Seattle Aircraft Certification Office, 
1601 Lind Avenue SW., Renton, WA 98057-3356; phone: 425-917-6450; fax: 
425-917-6590; email: alan.pohl@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 certain The Boeing Company 
Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. 
The NPRM published in the Federal Register on December 31, 2015 (80 FR 
81795) (``the NPRM''). The NPRM was prompted by reports of heavy 
corrosion and chrome damage on the forward and aft trunnion pin 
assemblies of the right and left MLGs. The NPRM proposed to require 
repetitive lubrication of the forward and aft trunnion pin assemblies 
of the right and left MLGs; repetitive inspections of these assemblies 
for corrosion and chrome damage, and related investigative and 
corrective actions if necessary; and installation of new or modified 
trunnion pin assembly components, which would terminate the repetitive 
lubrication and repetitive inspections. We are issuing this AD to 
detect and correct heavy corrosion and chrome damage on the forward and 
aft trunnion pin assemblies of the right and left MLGs, which could 
result in cracking of these assemblies and collapse of the MLGs.

Comments

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

Support for the NPRM

    Boeing stated that it concurs with the contents of the NPRM.

Effect of Winglets on Accomplishment of the Proposed Actions

    Aviation Partners Boeing stated that accomplishing Supplemental 
Type Certificate (STC) ST00830SE does not affect the accomplishment of 
the actions specified in the NPRM.
    We concur with the commenter. We have redesignated paragraph (c) of 
the proposed AD as paragraph (c)(1) and added new paragraph (c)(2) in 
this AD to state that installation of STC ST00830SE does not affect the 
ability to accomplish the actions required by this final rule. 
Therefore, for airplanes on which STC ST00830SE 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.

Request for Clarification of Requirements

    Delta Airlines (DAL) requested an explanation of how the 
requirements are different between AD 2014-08-11, Amendment 39-17835 
(79 FR 23903, April 29, 2014) (``AD 2014-08-11'') and the NPRM. DAL 
noted that the requirements of AD 2014-08-11 include an inspection for 
discrepancies of the transition radius of the MLG forward trunnion 
pins, and corrective actions if necessary. DAL elaborated that this 
inspection is for finish damage (scrapes through primer), signs of 
corrosion, pitting, and scratches in the base metal of that area. DAL 
pointed out that the NPRM requires a general visual inspection of the 
MLG forward trunnion pin assembly for signs of corrosion or chrome 
plating damage, and if either condition is found, a detailed inspection 
of the forward trunnion pin assembly is required. DAL mentioned that 
the detailed inspection requires verification that a new seal and 
retainer configuration is installed, and if the overhaul limits exceed 
what is specified in the component maintenance manual, replacement of 
the forward trunnion pin assembly is necessary. DAL reasoned that the 
forward trunnion pin inspections required by AD 2014-08-11 should be 
superseded by the proposed forward trunnion pin inspections in the 
NPRM. DAL stated that the detailed inspection proposed in the NPRM has 
additional corrective actions if any loose or missing chrome plating is 
found, beyond what is required in AD 2014-08-11. DAL also conveyed that 
the inspections for signs of corrosion are the same in the NPRM and AD 
2014-08-11.
    We agree to provide clarification regarding how the requirements 
are different between the requirements in the proposed AD and the 
requirements mandated by AD 2014-08-11. The applicability of the 
proposed AD includes certain The Boeing Company Model 737-600, -700, -
700C, -800, -900, and -900ER series airplanes, line numbers 1 through 
3526 inclusive. The applicability of AD 2014-08-11 includes certain The 
Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER 
series airplanes, line numbers 1423 through 3526 inclusive. Although 
certain airplane line numbers are included in the applicability of both 
the proposed AD and AD 2014-08-11, the issues addressed by the NPRM and 
AD 2014-08-11 are not the same. Furthermore, the inspection 
instructions in the service information required for accomplishing the 
actions in the proposed AD are different from the inspection 
instructions in the service information required by AD 2014-08-11. The 
inspections in the proposed AD focus on chrome damage and corrosion on 
the shank of the forward trunnion pins, and the inspections required by 
AD 2014-08-11 focus on finish scratches and corrosion in the transition 
radius of the forward trunnion pins. We have not changed this AD 
regarding this issue.
    In addition, we note that the service information required to do 
the actions required by AD 2014-08-11 (which cites Boeing Special 
Attention Service Bulletin 737-32-1402, Revision 1, dated February 7, 
2013), includes a recommendation by Boeing that operators accomplish 
the specified actions concurrently with the actions specified in Boeing 
Special Attention Service Bulletin 737-32-1448 (Boeing Special 
Attention Service Bulletin 737-32-1448, Revision 1, dated May 29, 2015, 
is the appropriate source of service information for accomplishing the 
actions required by this AD).

[[Page 59832]]

Likewise, Boeing Special Attention Service Bulletin 737-32-1448, 
Revision 1, dated May 29, 2015, includes a recommendation by Boeing 
that operators accomplish the specified actions concurrently with the 
actions specified in Boeing Special Attention Service Bulletin 737-32-
1402.

Request for Clarification of Lube Fittings Location

    DAL requested clarification regarding the location of the lube 
fittings for the forward and aft MLG trunnion pin assemblies in 
paragraph (g) of the NPRM. DAL commented that the NPRM stated to do the 
repetitive lubrication in accordance with Work Package 1 of the 
Accomplishment Instructions of Boeing Special Attention Service 
Bulletin 737-32-1448, Revision 1, dated May 29, 2015. DAL noted that 
Work Package 1 of the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 737-32-1448, Revision 1, dated May 29, 2015, 
refers to section 12-21-11 of the Boeing 737-600/700/800/900 Aircraft 
Maintenance Manual (AMM) as an accepted procedure for the repetitive 
lubrication of the MLG trunnion pin assemblies. DAL stated that section 
12-21-11 of the AMM specifically identifies the locations of the 
trunnion bearing housing and the aft trunnion bearing, but does not 
specifically identify the locations of the two lube fittings for the 
forward and aft trunnion pins.
    We agree with the commenter that the two lube fittings for the 
forward and aft trunnion pins are not specifically mentioned in section 
12-21-11 of the Boeing 737-600/700/800/900 AMM. These locations are 
identified as Item [6], ``Outer Cylinder,'' on page 307 of the AMM. 
However, there are only three lube fittings associated with Item [6], 
so it is possible to determine which two fittings are to be used for 
lubricating the forward and aft trunnion pins. We consulted with Boeing 
and confirmed that the two lube fittings are located on the bottom of 
the outer cylinder trunnion, directly under the pins. We have not 
changed this AD regarding this issue.

Request for Clarification of Corrective Actions in Paragraph (h) of the 
Proposed AD

    DAL requested clarification of certain corrective actions in 
paragraph (h) of the proposed AD. DAL asked if an operator can replace 
an affected trunnion pin assembly instead of overhauling it. DAL 
pointed out that neither the NPRM nor Boeing Special Attention Service 
Bulletin 737-32-1448, Revision 1, dated May 29, 2015, specify the part 
number of the replacement trunnion pin assembly. DAL asked if an 
operator can replace an affected pin assembly with any properly 
approved pin assembly using the Boeing 737 Aircraft Illustrated Parts 
Catalog, Boeing Drawing 161A0002, ``Boeing Model 737-NG Main Landing 
Gear Component Interchangeability List,'' or a similar document.
    We agree with the commenter's request for clarification. Operators 
may elect to replace a trunnion pin assembly with a serviceable unit in 
lieu of performing an overhaul. However, operators should be aware that 
some of the existing trunnion pin assemblies require modification. 
Figures 9, 11, and 12 of Boeing Special Attention Service Bulletin 737-
32-1448, Revision 1, dated May 29, 2015, provide instructions for 
modifying certain pin assemblies. Note (c) in each of these figures 
refers to paragraph 2.C.3., ``Parts Modified and Reidentified,'' of 
Boeing Special Attention Service Bulletin 737-32-1448, Revision 1, 
dated May 29, 2015, which shows the existing and modified part numbers. 
For use of other part numbers, such as those identified in the Boeing 
737 Aircraft Illustrated Parts Catalog or Boeing Drawing 161A0002, 
``Boeing Model 737-NG Main Landing Gear Component Interchangeability 
List,'' operators may request an alternative method of compliance in 
accordance with the procedures specified in paragraph (m) of this AD. 
We have not changed this AD regarding this issue.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
this AD 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 AD.

Related Service Information Under 1 CFR Part 51

    We reviewed Boeing Special Attention Service Bulletin 737-32-1448, 
Revision 1, dated May 29, 2015. The service information describes 
procedures for lubricating the forward and aft trunnion pin assemblies 
on the left and right MLGs, inspecting the forward and aft trunnion pin 
assemblies for corrosion or damage, and performing corrective actions. 
In addition, the service information describes procedures for 
installing a new forward trunnion pin housing assembly, seal, and 
retainer configuration. 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 1,023 airplanes of U.S. registry.
    We estimate the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                              Cost per          Cost on U.S.
              Action                      Labor cost         Parts cost        product           operators
----------------------------------------------------------------------------------------------------------------
Lubrication.......................  2 work-hours x $85                 $0            $170  $173,910, per
                                     per hour = $170, per                                   lubrication cycle
                                     lubrication cycle.                                     (1,023 airplanes).
Inspection (Groups 1 and 2,         51 work-hours x $85                 0           4,335  4,282,980, per
 Configuration 1 airplanes).         per hour = $4,335,                                     inspection cycle
                                     per inspection cycle.                                  (988 airplanes).
Inspection (Group 3 airplanes)....  93 work-hours x $85                 0           7,905  276,675, per
                                     per hour = $7,905,                                     inspection cycle (35
                                     per inspection cycle.                                  airplanes).
Replacement/overhaul (Groups 1 and  84 work-hours x $85                 0           7,140  7,054,320 (988
 2 airplanes).                       per hour = $7,140.                                     airplanes).
Replacement/overhaul (Group 3       86 work-hours x $85                 0           7,310  255,850 (35
 airplanes).                         per hour = $7,310.                                     airplanes).
----------------------------------------------------------------------------------------------------------------


[[Page 59833]]

    We have received no definitive data that would enable 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.

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):

2016-18-01 The Boeing Company: Amendment 39-18631; Docket No. FAA-
2015-8133; Directorate Identifier 2015-NM-101-AD.

(a) Effective Date

    This AD is effective October 5, 2016.

(b) Affected ADs

    None.

(c) Applicability

    (1) This AD applies to certain The Boeing Company Model 737-600, 
-700, -700C, -800, -900, and -900ER series airplanes, certificated 
in any category, as identified in Boeing Special Attention Service 
Bulletin 737-32-1448, Revision 1, dated May 29, 2015.
    (2) Installation of Supplemental Type Certificate (STC) 
ST00830SE (https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/184DE9A71EC3FA5586257EAE00707DA6?OpenDocument&Highlight=st00830se) 
does not affect the ability to accomplish the actions required by 
this AD. Therefore, for airplanes on which STC ST00830SE 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 32, Landing 
Gear.

(e) Unsafe Condition

    This AD was prompted by reports of heavy corrosion and chrome 
damage of the forward and aft trunnion pin assemblies of the right 
and left main landing gears (MLGs). We are issuing this AD to detect 
and correct heavy corrosion and chrome damage of the forward and aft 
trunnion pin assemblies of the right and left MLGs, which could 
result in cracking of these assemblies and collapse of the MLGs.

(f) Compliance

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

(g) Repetitive Lubrication of MLG Trunnion Pin Assemblies

    For airplanes in Groups 1 and 2, Configuration 1, and airplanes 
in Group 3, as identified in Boeing Special Attention Service 
Bulletin 737-32-1448, Revision 1, dated May 29, 2015: Except as 
required by paragraph (k) of this AD, at the applicable time 
specified in Table 1 or Table 2 of paragraph 1.E., ``Compliance,'' 
of Boeing Special Attention Service Bulletin 737-32-1448, Revision 
1, dated May 29, 2015, lubricate the forward and aft trunnion pin 
assemblies of the left and right MLGs, in accordance with Work 
Package 1 of the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 737-32-1448, Revision 1, dated May 29, 
2015. Repeat the lubrication thereafter at intervals not to exceed 
those specified in paragraph 1.E., ``Compliance,'' of Boeing Special 
Attention Service Bulletin 737-32-1448, Revision 1, dated May 29, 
2015. Accomplishment of the actions specified in paragraph (i) of 
this AD terminates the repetitive lubrication required by this 
paragraph.

(h) Repetitive Inspections, Corrective Actions, and Lubrication

    For airplanes in Groups 1 and 2, Configuration 1, and airplanes 
in Group 3, as identified in Boeing Special Attention Service 
Bulletin 737-32-1448, Revision 1, dated May 29, 2015: Except as 
required by paragraph (k) of this AD, at the applicable time 
specified in Table 1 or Table 2 of paragraph 1.E., ``Compliance,'' 
of Boeing Special Attention Service Bulletin 737-32-1448, Revision 
1, dated May 29, 2015, do a general visual inspection of the left 
and right MLGs at the forward and aft trunnion pin locations and the 
visible surfaces of the forward and aft trunnion pin assemblies for 
signs of corrosion or chrome plating damage and lubricate the 
forward and aft trunnion pin assemblies, in accordance with Work 
Package 2 of the Accomplishment Instructions of Boeing Special 
Attention Service Bulletin 737-32-1448, Revision 1, dated May 29, 
2015. Repeat the general visual inspection thereafter at intervals 
not to exceed those specified in paragraph 1.E., ``Compliance,'' of 
Boeing Special Attention Service Bulletin 737-32-1448, Revision 1, 
dated May 29, 2015. If any discrepancy is found during any 
inspection required by this paragraph, before further flight, do all 
applicable related investigative and corrective actions in 
accordance with Work Package 2 of the Accomplishment Instructions of 
Boeing Special Attention Service Bulletin 737 32-1448, Revision 1, 
dated May 29, 2015. Accomplishment of the actions required by 
paragraph (i) of this AD terminates the repetitive inspections 
required by this paragraph.

(i) Modification of MLG Trunnion Pin Assemblies

    For airplanes in Groups 1 and 2, Configuration 1, and airplanes 
in Group 3, as identified in Boeing Special Attention Service 
Bulletin 737-32-1448, Revision 1, dated May 29, 2015: Except as 
required by paragraph (k) of this AD, at the applicable time 
specified in Table 1 or Table 2 of paragraph 1.E., ``Compliance,'' 
of Boeing Special Attention Service Bulletin 737-32-1448, Revision 
1, dated May 29, 2015, modify and lubricate the left and right MLG 
trunnion pin assemblies, and do all applicable related investigative 
and corrective actions, in accordance with Work Package 3 of the 
Accomplishment Instructions of Boeing Special Attention Service 
Bulletin 737-32-1448, Revision 1, dated May 29, 2015.

[[Page 59834]]

Accomplishment of the actions in Work Package 3 of the 
Accomplishment Instructions of Boeing Special Attention Service 
Bulletin 737-32-1448, Revision 1, dated May 29, 2015, terminates the 
repetitive lubrication required by paragraph (g) of this AD and the 
repetitive inspections required by paragraph (h) of this AD.

(j) Replacement of MLG Forward Trunnion Pin Housing Assembly, Seal, and 
Retainer

    For airplanes in Groups 1 and 2, Configuration 2, as identified 
in Boeing Special Attention Service Bulletin 737-32-1448, Revision 
1, dated May 29, 2015: At the applicable time specified in Table 3 
of paragraph 1.E., ``Compliance,'' of Boeing Special Attention 
Service Bulletin 737-32-1448, Revision 1, dated May 29, 2015, 
replace the seal, retainer, and support ring assembly with a new 
seal and retainer configuration; install the forward trunnion pin 
assembly into the housing assembly; and lubricate the forward and 
aft trunnion pin assemblies for the left and right MLGs; in 
accordance with Work Package 4 of the Accomplishment Instructions of 
Boeing Special Attention Service Bulletin 737-32-1448, Revision 1, 
dated May 29, 2015.

(k) Exception to Service Information Specification

    Where paragraph 1.E., ``Compliance,'' of Boeing Special 
Attention Service Bulletin 737-32-1448, Revision 1, dated May 29, 
2015, specifies a compliance time ``from the original issue date on 
this service bulletin,'' this AD requires compliance within the 
specified compliance time ``after the effective date of this AD.''

(l) Credit for Previous Actions

    This paragraph provides credit for the requirements of paragraph 
(g) of this AD, if those actions were performed before the effective 
date of this AD using Boeing Special Attention Service Bulletin 737-
32-1448, dated May 19, 2011, which is not incorporated by reference 
in this AD.

(m) 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 paragraph (n)(1) of this AD. 
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, 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, Seattle ACO 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.

(n) Related Information

    (1) For more information about this AD, contact Alan Pohl, 
Aerospace Engineer, Airframe Branch, ANM-120S, FAA Seattle Aircraft 
Certification Office, 1601 Lind Avenue SW., Renton, WA 98057-3356; 
phone: 425-917-6450; fax: 425-917-6590; email: alan.pohl@faa.gov.
    (2) Service information identified in this AD that is not 
incorporated by reference is available at the addresses specified in 
paragraphs (o)(3) and (o)(4) of this AD.

(o) 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 Special Attention Service Bulletin 737-32-1448, 
Revision 1, dated May 29, 2015.
    (ii) Reserved.
    (3) For 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.
    (4) You may view this service information at the FAA, Transport 
Airplane Directorate, 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: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Renton, Washington, on August 18, 2016.
Dorr M. Anderson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-20686 Filed 8-30-16; 8:45 am]
 BILLING CODE 4910-13-P
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