Airworthiness Directives; The Boeing Company Airplanes, 10750-10753 [2021-03593]

Download as PDF 10750 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations paragraph (i) of this AD was done before the effective date of this AD: (1) The actions specified in paragraph (g) of this AD are not required. (2) The initial accomplishment of the task specified in paragraphs (h)(1) and (2) of this AD is not required. (3) Task 33–51–54–603 must be done within 48 months after task ‘‘33–51–54–602’’ was accomplished, and thereafter at the intervals specified in task 33–51–54–603. (k) No Alternative Actions and Intervals After the existing maintenance or inspection program has been revised as required by paragraph (h) 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 (l)(1) of this AD. (l) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York 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 ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO Branch, 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. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, New York ACO Branch, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier’s TCCA Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (m) Related Information (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) Canadian AD CF–2020–07, dated March 17, 2020, 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–2020–0843. (2) For more information about this AD, contact Thomas Niczky, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7347; fax 516–794–5531; email 9-avs-nyaco-cos@faa.gov. (n) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this VerDate Sep<11>2014 21:28 Feb 22, 2021 Jkt 253001 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) Bombardier Service Bulletin 700–33– 024, dated May 13, 2019. (ii) Bombardier Global Express BD–700 Supplemental Time Limits/Maintenance Checks (STLMC) Temporary Revision (TR) 05–19091701, dated September 17, 2019. (iii) Bombardier Global Express BD–700 STLMC TR 05–19091704, dated September 17, 2019. (iv) Bombardier Global Express XRS BD– 700 STLMC TR 05–19091705, dated September 17, 2019. (3) For service information identified in this AD, contact Bombardier, Inc., 400 CoˆteVertu Road West, Dorval, Que´bec H4S 1Y9, Canada; telephone 514–855–5000; fax 514– 855–7401; email ac.yul@ aero.bombardier.com; internet https:// www.bombardier.com. (4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. (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, email fedreg.legal@nara.gov, or go to: https:// www.archives.gov/federal-register/cfr/ibrlocations.html. Issued on January 29, 2021. Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–03574 Filed 2–22–21; 8:45 am] BILLING CODE 4910–13–P from the airplane. This AD requires repetitive replacement of certain parts; a general visual inspection to determine production configuration for certain parts; a repetitive lubrication of certain parts and a repetitive general visual inspection of certain parts for any exuding grease; repetitive detailed inspections of certain parts for loose or missing attachment bolts, cracks or bushing migration, cracks or gouges, or broken, binding, or missing rollers; repetitive detailed inspections of certain parts for cracks or corrosion; repetitive lubrication; and on-condition actions if necessary. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective March 30, 2021. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of March 30, 2021. DATES: 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 90740–5600; phone: 562–797–1717; internet: https:// www.myboeingfleet.com. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. It is also available on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA–2020–0211. ADDRESSES: DEPARTMENT OF TRANSPORTATION Examining the AD Docket Federal Aviation Administration You may examine the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2020– 0211; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. 14 CFR Part 39 [Docket No. FAA–2020–0211; Product Identifier 2020–NM–006–AD; Amendment 39–21398; AD 2021–02–15] RIN 2120–AA64 Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747–100, 747–100B, 747–100B SUD, 747–200B, 747–200C, 747–200F, 747–300, 747– 400, 747–400D, 747–400F, and 747SR series airplanes. This AD was prompted by reports of inboard foreflap departures SUMMARY: PO 00000 Frm 00048 Fmt 4700 Sfmt 4700 Eric Lin, Aerospace Engineer, Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206–231–3523; email: eric.lin@faa.gov. FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: E:\FR\FM\23FER1.SGM 23FER1 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations Discussion The FAA 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 747–100, 747–100B, 747–100B SUD, 747–200B, 747–200C, 747–200F, 747–300, 747–400, 747–400D, 747– 400F, and 747SR series airplanes. The NPRM published in the Federal Register on May 18, 2020 (85 FR 29673). The NPRM was prompted by reports of inboard foreflap departures from the airplane. The NPRM proposed to require repetitive replacement of certain parts; a general visual inspection to determine production configuration for certain parts; a repetitive lubrication of certain parts and a repetitive general visual inspection of certain parts for any exuding grease; repetitive detailed inspections of certain parts for loose or missing attachment bolts, cracks or bushing migration, cracks or gouges, or broken, binding, or missing rollers; repetitive detailed inspections of certain parts for cracks or corrosion; repetitive lubrication; and on-condition actions if necessary. The FAA is issuing this AD to address departures of the inboard foreflap assembly from the airplane, which could result in damage to the airplane and adversely affect the airplane’s continued safe flight and landing. Comments The FAA 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. Support for the NPRM The Air Line Pilots Association, International (ALPA) and Boeing expressed support for the NPRM. Request To Incorporate Inspection and Overhaul Program Atlas Air (Atlas) requested that the FAA revise the proposed AD to incorporate and provide credit for Atlas’s flap inspection and overhaul program. Atlas explained that after four flap failure events, their flap mitigation team formulated a program of actions that successfully address the unsafe conditions cited in the NPRM. The FAA acknowledges that alternative methods may exist to address the potential unsafe condition, but disagrees with the request to revise this AD to incorporate specific actions from the Atlas flap mitigation program. That program is unique to an individual operator, and Atlas has not provided the FAA substantiating data demonstrating VerDate Sep<11>2014 21:28 Feb 22, 2021 Jkt 253001 that these proposed changes provide an equivalent level of safety. Atlas may apply for an AMOC with substantiating data. The FAA has not changed this AD with regard to this request. Request for Change in Inspection Requirement Cargolux (CLX) requested that the proposed inspection, as specified in Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019, Table 1, Action 2, no longer include identifying nuts with part number BACN10HR7CD. CLX explained that determining the part number by inspection is difficult due to access restrictions, and operators may have to replace the subject nuts to be compliant with the proposed AD. The FAA disagrees with the requested exemption because it is unnecessary. Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019, Table 1, Action 2, specifies a ‘‘general visual inspection of the inboard foreflap assembly stop, stop attachment bolts, stop lug attachment bolts, and rollers.’’ The subject nuts are not specifically identified. Additionally, the service bulletin does not mandate a specific method of compliance for this inspection. It refers to Part 2 of Boeing Alert Service Bulletin 747–57A2367, dated November 15, 2019, where the subject nut is listed, as an accepted procedure. In accordance with Note 6 of the Accomplishment Instructions, ‘‘when the words ‘refer to’ are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used.’’ The FAA has not changed this AD regarding this request. Request To Allow Alternative Part Numbers CLX requested that approved alternative, substitute, or interchangeable part numbers for specified parts be allowed when demonstrating compliance. CLX is concerned that operators may have trouble obtaining parts if the parts have been replaced and there are interchangeable parts available in lieu of the required part number. The FAA disagrees with the request. The design approval holder (DAH) identified the parts necessary to address the unsafe condition. Kits with those replacement part numbers may be acquired from the DAH. Additionally, CLX did not provide the FAA any substantiating data to demonstrate that any alternative/substitute part provides an acceptable level of safety. CLX may submit an AMOC request with supporting data that demonstrates an PO 00000 Frm 00049 Fmt 4700 Sfmt 4700 10751 acceptable level of safety for a replacement part not specified in the service information. The FAA has not changed this AD regarding this request. Request To Specify Document as Aid Royal Dutch Airlines (KLM) and CLX requested that Boeing document 747– FTD–57–10002 be specified in the proposed AD as an aid for the general visual inspection described in Boeing Alert Requirements Bulletin 747– 57A2367 RB, dated November 15, 2019, to identify part numbers currently installed on the airplane. KLM and CLX claimed that dirt, grease, or sealant may prevent part numbers from being identified by way of a general visual inspection and that the document provided by Boeing should be used as a visual aid. The FAA agrees with using visual aids or other documentation to help identify part numbers during the inspection. However, the FAA disagrees with revising the AD to require the specified document. Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019, refers to a procedure in Boeing Alert Service Bulletin 747–57A2367, dated November 15, 2019, as an accepted procedure for the general visual inspection to identify the parts production configuration. Note 6 of the Accomplishment Instructions states that ‘‘when the words ‘refer to’ are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used.’’ The FAA has not changed this AD regarding this request. Request To Allow Optional Records Check Both KLM and CLX requested that a maintenance records check be allowed as an option to the general visual inspection specified in Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019, for the purpose of identifying parts currently installed on the airplane. Both KLM and CLX stated that operators should be able to determine whether their maintenance records are accurate. The FAA disagrees with the request. The service information was coordinated with the DAH and it was determined that a physical check, as specified in Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019, is required. This AD has not been changed regarding this request. Request To Accept Work Package From Previous Service Bulletin United Parcel Service (UPS) requested that the FAA also accept E:\FR\FM\23FER1.SGM 23FER1 10752 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations accomplishment of Work Package 3 of Boeing Alert Service Bulletin 747–27– 2366, Revision 3, dated March 22, 2016, in lieu of the initial inspection specified by Table 4 of Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019. UPS asserted that there is significant overlap between the two flap inspections. The FAA does not agree with the request. The inspections specified in Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019, include additional structure to inspect, compared to Boeing Alert Service Bulletin 747–27–2366, Revision 3, dated March 22, 2016, and also specify corrective action if damage is detected. The requirements of this AD have been coordinated with the DAH. UPS did not provide the FAA any substantiating data to demonstrate that the less stringent inspections from Boeing Alert Service Bulletin 747–27– 2366, Revision 3, dated March 22, 2016, provide an acceptable level of safety. The FAA has not changed this AD as a result of this comment. Conclusion The FAA reviewed the relevant data, considered the comments received, and determined that air safety and the public interest require adopting this final rule as proposed, except for minor editorial changes. The FAA has determined that these minor changes: • Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM. Related Service Information Under 1 CFR Part 51 The FAA reviewed Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019. This service information describes procedures for repetitive replacement of certain parts; a general visual inspection to determine production configuration for certain parts; a repetitive lubrication of certain parts and a repetitive general visual inspection of certain parts for any exuding grease; repetitive detailed inspections of certain parts for loose or missing attachment bolts, cracks or bushing migration, cracks or gouges, or broken, binding, or missing rollers; repetitive detailed inspections of certain parts for cracks or corrosion; repetitive lubrication; and on-condition actions if necessary. On-condition actions include replacements and repair. 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 The FAA estimates that this AD affects 125 airplanes of U.S. registry. The FAA estimate the following costs to comply with this AD: ESTIMATED COSTS FOR REQUIRED ACTIONS Action Labor cost Repetitive replacement ................... Up to 10 work-hours × $85 per hour = Up to $850 per replacement cycle. 1 work-hour × $85 per hour = $85 $35,719 4 work-hours × $85 per hour = $340 per inspection cycle. 1 work-hour × $85 per hour = $85 per lubrication. General visual inspection for parts production configuration. Repetitive detailed inspections ....... Repetitive inspection for lubrication and repetitive lubrication. The FAA estimates the following costs to do any necessary on-condition Parts cost Cost per product Cost on U.S. operators Up to $36,569 per replacement cycle. Up to $4,571,125 per replacement cycle. 0 $85 .................................. $10,625. 0 $340 per inspection cycle 0 $85 per lubrication .......... $42,500 per inspection cycle. $10,625 per lubrication. actions that would be required. The FAA has no way of determining the number of aircraft that might need these on-condition actions: ESTIMATED COSTS OF ON-CONDITION REPLACEMENTS Labor cost Parts cost Up to 8 work-hour × $85 per hour = $680 ........................................................................................................ Up to $17,720 .. The FAA has received no definitive data that would enable the FAA to provide cost estimates for the oncondition repairs 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. The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under VerDate Sep<11>2014 21:28 Feb 22, 2021 Jkt 253001 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 PO 00000 Frm 00050 Fmt 4700 Sfmt 4700 Cost per product Up to $18,400. 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) Will not affect intrastate aviation in Alaska, and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. E:\FR\FM\23FER1.SGM 23FER1 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 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: (h) Exceptions to Service Information Specifications Where Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019, uses the phrase ‘‘the original issue date of Requirements Bulletin 747–57A2367 RB,’’ this AD requires using ‘‘the effective date of this AD.’’ PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: ■ 2021–02–15 The Boeing Company: Amendment 39–21398; Docket No. FAA–2020–0211; Product Identifier 2020–NM–006–AD. (a) Effective Date This airworthiness directive (AD) is effective March 30, 2021. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 747–100, 747–100B, 747–100B SUD, 747–200B, 747–200C, 747–200F, 747–300, 747–400, 747–400D, 747–400F, and 747SR series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019. (d) Subject Air Transport Association (ATA) of America Code 57, Wings. (e) Unsafe Condition This AD was prompted by reports of inboard foreflap departures from the airplane. The FAA is issuing this AD to address departures of the inboard foreflap assembly from the airplane, which could result in damage to the airplane and adversely affect the airplane’s continued safe flight and landing. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions Except as specified by paragraph (h) of this AD: At the applicable times specified in the ‘‘Compliance’’ paragraph of Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019. VerDate Sep<11>2014 21:28 Feb 22, 2021 Jkt 253001 Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 747–57A2367, dated November 15, 2019, which is referred to in Boeing Alert Requirements Bulletin 747–57A2367 RB, dated November 15, 2019. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, Seattle 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 (j) of this AD. Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. (3) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by The Boeing Company Organization Designation Authorization (ODA) that has been authorized by the Manager, Seattle ACO Branch, FAA, 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. (j) Related Information For more information about this AD, contact Eric Lin, Aerospace Engineer, Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206–231–3523; email: eric.lin@faa.gov. (k) 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 Requirements Bulletin 747–57A2367 RB, dated November 15, 2019. (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 90740–5600; phone: 562–797–1717; internet: https:// www.myboeingfleet.com. PO 00000 Frm 00051 Fmt 4700 Sfmt 4700 10753 (4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. (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, email fedreg.legal@nara.gov, or go to: https:// www.archives.gov/federal-register/cfr/ibrlocations.html. Issued on January 14, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–03593 Filed 2–22–21; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2020–0691; Product Identifier 2020–NM–064–AD; Amendment 39–21377; AD 2021–01–01] RIN 2120–AA64 Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain MHI RJ Aviation ULC Model CL–600– 2B19 (Regional Jet Series 100 & 440) airplanes. This AD was prompted by evidence that a revised structural life limit of some components of the nose landing gear (NLG) and/or main landing gear (MLG) was not implemented during repair. This AD requires verifying that the affected components are installed on the airplane, revising the structural life limits in the existing structural deviation inspection requirements (SDIR) airplane document, and replacing affected components if necessary. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective March 30, 2021. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of March 30, 2021. ADDRESSES: For service information identified in this final rule, contact MHI SUMMARY: E:\FR\FM\23FER1.SGM 23FER1

Agencies

[Federal Register Volume 86, Number 34 (Tuesday, February 23, 2021)]
[Rules and Regulations]
[Pages 10750-10753]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-03593]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0211; Product Identifier 2020-NM-006-AD; Amendment 
39-21398; AD 2021-02-15]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-
200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 
747SR series airplanes. This AD was prompted by reports of inboard 
foreflap departures from the airplane. This AD requires repetitive 
replacement of certain parts; a general visual inspection to determine 
production configuration for certain parts; a repetitive lubrication of 
certain parts and a repetitive general visual inspection of certain 
parts for any exuding grease; repetitive detailed inspections of 
certain parts for loose or missing attachment bolts, cracks or bushing 
migration, cracks or gouges, or broken, binding, or missing rollers; 
repetitive detailed inspections of certain parts for cracks or 
corrosion; repetitive lubrication; and on-condition actions if 
necessary. The FAA is issuing this AD to address the unsafe condition 
on these products.

DATES: This AD is effective March 30, 2021.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of March 30, 
2021.

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 
90740-5600; phone: 562-797-1717; internet: https://www.myboeingfleet.com. You may view this service information at the 
FAA, Airworthiness Products Section, Operational Safety Branch, 2200 
South 216th St., Des Moines, WA. For information on the availability of 
this material at the FAA, call 206-231-3195. It is also available on 
the internet at https://www.regulations.gov by searching for and 
locating Docket No. FAA-2020-0211.

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-2020-
0211; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this final rule, any comments received, and other information. The 
address for Docket Operations is 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: Eric Lin, Aerospace Engineer, Airframe 
Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 
98198; phone and fax: 206-231-3523; email: [email protected].

SUPPLEMENTARY INFORMATION: 

[[Page 10751]]

Discussion

    The FAA 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 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-
200F, 747-300, 747-400, 747-400D, 747-400F, and 747SR series airplanes. 
The NPRM published in the Federal Register on May 18, 2020 (85 FR 
29673). The NPRM was prompted by reports of inboard foreflap departures 
from the airplane. The NPRM proposed to require repetitive replacement 
of certain parts; a general visual inspection to determine production 
configuration for certain parts; a repetitive lubrication of certain 
parts and a repetitive general visual inspection of certain parts for 
any exuding grease; repetitive detailed inspections of certain parts 
for loose or missing attachment bolts, cracks or bushing migration, 
cracks or gouges, or broken, binding, or missing rollers; repetitive 
detailed inspections of certain parts for cracks or corrosion; 
repetitive lubrication; and on-condition actions if necessary.
    The FAA is issuing this AD to address departures of the inboard 
foreflap assembly from the airplane, which could result in damage to 
the airplane and adversely affect the airplane's continued safe flight 
and landing.

Comments

    The FAA 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.

Support for the NPRM

    The Air Line Pilots Association, International (ALPA) and Boeing 
expressed support for the NPRM.

Request To Incorporate Inspection and Overhaul Program

    Atlas Air (Atlas) requested that the FAA revise the proposed AD to 
incorporate and provide credit for Atlas's flap inspection and overhaul 
program. Atlas explained that after four flap failure events, their 
flap mitigation team formulated a program of actions that successfully 
address the unsafe conditions cited in the NPRM.
    The FAA acknowledges that alternative methods may exist to address 
the potential unsafe condition, but disagrees with the request to 
revise this AD to incorporate specific actions from the Atlas flap 
mitigation program. That program is unique to an individual operator, 
and Atlas has not provided the FAA substantiating data demonstrating 
that these proposed changes provide an equivalent level of safety. 
Atlas may apply for an AMOC with substantiating data. The FAA has not 
changed this AD with regard to this request.

Request for Change in Inspection Requirement

    Cargolux (CLX) requested that the proposed inspection, as specified 
in Boeing Alert Requirements Bulletin 747-57A2367 RB, dated November 
15, 2019, Table 1, Action 2, no longer include identifying nuts with 
part number BACN10HR7CD. CLX explained that determining the part number 
by inspection is difficult due to access restrictions, and operators 
may have to replace the subject nuts to be compliant with the proposed 
AD.
    The FAA disagrees with the requested exemption because it is 
unnecessary. Boeing Alert Requirements Bulletin 747-57A2367 RB, dated 
November 15, 2019, Table 1, Action 2, specifies a ``general visual 
inspection of the inboard foreflap assembly stop, stop attachment 
bolts, stop lug attachment bolts, and rollers.'' The subject nuts are 
not specifically identified. Additionally, the service bulletin does 
not mandate a specific method of compliance for this inspection. It 
refers to Part 2 of Boeing Alert Service Bulletin 747-57A2367, dated 
November 15, 2019, where the subject nut is listed, as an accepted 
procedure. In accordance with Note 6 of the Accomplishment 
Instructions, ``when the words `refer to' are used and the operator has 
an accepted alternative procedure, the accepted alternative procedure 
can be used.'' The FAA has not changed this AD regarding this request.

Request To Allow Alternative Part Numbers

    CLX requested that approved alternative, substitute, or 
interchangeable part numbers for specified parts be allowed when 
demonstrating compliance. CLX is concerned that operators may have 
trouble obtaining parts if the parts have been replaced and there are 
interchangeable parts available in lieu of the required part number.
    The FAA disagrees with the request. The design approval holder 
(DAH) identified the parts necessary to address the unsafe condition. 
Kits with those replacement part numbers may be acquired from the DAH. 
Additionally, CLX did not provide the FAA any substantiating data to 
demonstrate that any alternative/substitute part provides an acceptable 
level of safety. CLX may submit an AMOC request with supporting data 
that demonstrates an acceptable level of safety for a replacement part 
not specified in the service information. The FAA has not changed this 
AD regarding this request.

Request To Specify Document as Aid

    Royal Dutch Airlines (KLM) and CLX requested that Boeing document 
747-FTD-57-10002 be specified in the proposed AD as an aid for the 
general visual inspection described in Boeing Alert Requirements 
Bulletin 747-57A2367 RB, dated November 15, 2019, to identify part 
numbers currently installed on the airplane. KLM and CLX claimed that 
dirt, grease, or sealant may prevent part numbers from being identified 
by way of a general visual inspection and that the document provided by 
Boeing should be used as a visual aid.
    The FAA agrees with using visual aids or other documentation to 
help identify part numbers during the inspection. However, the FAA 
disagrees with revising the AD to require the specified document. 
Boeing Alert Requirements Bulletin 747-57A2367 RB, dated November 15, 
2019, refers to a procedure in Boeing Alert Service Bulletin 747-
57A2367, dated November 15, 2019, as an accepted procedure for the 
general visual inspection to identify the parts production 
configuration. Note 6 of the Accomplishment Instructions states that 
``when the words `refer to' are used and the operator has an accepted 
alternative procedure, the accepted alternative procedure can be 
used.'' The FAA has not changed this AD regarding this request.

Request To Allow Optional Records Check

    Both KLM and CLX requested that a maintenance records check be 
allowed as an option to the general visual inspection specified in 
Boeing Alert Requirements Bulletin 747-57A2367 RB, dated November 15, 
2019, for the purpose of identifying parts currently installed on the 
airplane. Both KLM and CLX stated that operators should be able to 
determine whether their maintenance records are accurate.
    The FAA disagrees with the request. The service information was 
coordinated with the DAH and it was determined that a physical check, 
as specified in Boeing Alert Requirements Bulletin 747-57A2367 RB, 
dated November 15, 2019, is required. This AD has not been changed 
regarding this request.

Request To Accept Work Package From Previous Service Bulletin

    United Parcel Service (UPS) requested that the FAA also accept

[[Page 10752]]

accomplishment of Work Package 3 of Boeing Alert Service Bulletin 747-
27-2366, Revision 3, dated March 22, 2016, in lieu of the initial 
inspection specified by Table 4 of Boeing Alert Requirements Bulletin 
747-57A2367 RB, dated November 15, 2019. UPS asserted that there is 
significant overlap between the two flap inspections.
    The FAA does not agree with the request. The inspections specified 
in Boeing Alert Requirements Bulletin 747-57A2367 RB, dated November 
15, 2019, include additional structure to inspect, compared to Boeing 
Alert Service Bulletin 747-27-2366, Revision 3, dated March 22, 2016, 
and also specify corrective action if damage is detected. The 
requirements of this AD have been coordinated with the DAH. UPS did not 
provide the FAA any substantiating data to demonstrate that the less 
stringent inspections from Boeing Alert Service Bulletin 747-27-2366, 
Revision 3, dated March 22, 2016, provide an acceptable level of 
safety. The FAA has not changed this AD as a result of this comment.

Conclusion

    The FAA reviewed the relevant data, considered the comments 
received, and determined that air safety and the public interest 
require adopting this final rule as proposed, except for minor 
editorial changes. The FAA has determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM for addressing the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Boeing Alert Requirements Bulletin 747-57A2367 RB, 
dated November 15, 2019. This service information describes procedures 
for repetitive replacement of certain parts; a general visual 
inspection to determine production configuration for certain parts; a 
repetitive lubrication of certain parts and a repetitive general visual 
inspection of certain parts for any exuding grease; repetitive detailed 
inspections of certain parts for loose or missing attachment bolts, 
cracks or bushing migration, cracks or gouges, or broken, binding, or 
missing rollers; repetitive detailed inspections of certain parts for 
cracks or corrosion; repetitive lubrication; and on-condition actions 
if necessary. On-condition actions include replacements and repair. 
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

    The FAA estimates that this AD affects 125 airplanes of U.S. 
registry. The FAA estimate the following costs to comply with this AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                 Cost on U.S.
             Action                     Labor cost          Parts cost     Cost per product        operators
----------------------------------------------------------------------------------------------------------------
Repetitive replacement.........  Up to 10 work-hours x           $35,719  Up to $36,569 per   Up to $4,571,125
                                  $85 per hour = Up to                     replacement cycle.  per replacement
                                  $850 per replacement                                         cycle.
                                  cycle.
General visual inspection for    1 work-hour x $85 per                 0  $85...............  $10,625.
 parts production configuration.  hour = $85.
Repetitive detailed inspections  4 work-hours x $85 per                0  $340 per            $42,500 per
                                  hour = $340 per                          inspection cycle.   inspection cycle.
                                  inspection cycle.
Repetitive inspection for        1 work-hour x $85 per                 0  $85 per             $10,625 per
 lubrication and repetitive       hour = $85 per                           lubrication.        lubrication.
 lubrication.                     lubrication.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary on-
condition actions that would be required. The FAA has no way of 
determining the number of aircraft that might need these on-condition 
actions:

              Estimated Costs of On-Condition Replacements
------------------------------------------------------------------------
         Labor cost                Parts cost         Cost per product
------------------------------------------------------------------------
Up to 8 work-hour x $85 per   Up to $17,720.......  Up to $18,400.
 hour = $680.
------------------------------------------------------------------------

    The FAA has received no definitive data that would enable the FAA 
to provide cost estimates for the on-condition repairs 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.
    The FAA is 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) Will not affect intrastate aviation in Alaska, and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

[[Page 10753]]

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:

2021-02-15 The Boeing Company: Amendment 39-21398; Docket No. FAA-
2020-0211; Product Identifier 2020-NM-006-AD.

(a) Effective Date

    This airworthiness directive (AD) is effective March 30, 2021.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to The Boeing Company Model 747-100, 747-100B, 
747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-
400D, 747-400F, and 747SR series airplanes, certificated in any 
category, as identified in Boeing Alert Requirements Bulletin 747-
57A2367 RB, dated November 15, 2019.

(d) Subject

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

(e) Unsafe Condition

    This AD was prompted by reports of inboard foreflap departures 
from the airplane. The FAA is issuing this AD to address departures 
of the inboard foreflap assembly from the airplane, which could 
result in damage to the airplane and adversely affect the airplane's 
continued safe flight and landing.

(f) Compliance

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

(g) Required Actions

    Except as specified by paragraph (h) of this AD: At the 
applicable times specified in the ``Compliance'' paragraph of Boeing 
Alert Requirements Bulletin 747-57A2367 RB, dated November 15, 2019, 
do all applicable actions identified in, and in accordance with, the 
Accomplishment Instructions of Boeing Alert Requirements Bulletin 
747-57A2367 RB, dated November 15, 2019.

    Note 1 to paragraph (g):  Guidance for accomplishing the actions 
required by this AD can be found in Boeing Alert Service Bulletin 
747-57A2367, dated November 15, 2019, which is referred to in Boeing 
Alert Requirements Bulletin 747-57A2367 RB, dated November 15, 2019.

(h) Exceptions to Service Information Specifications

    Where Boeing Alert Requirements Bulletin 747-57A2367 RB, dated 
November 15, 2019, uses the phrase ``the original issue date of 
Requirements Bulletin 747-57A2367 RB,'' this AD requires using ``the 
effective date of this AD.''

(i) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Seattle 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 (j) of this AD. Information may be 
emailed to: [email protected].
    (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 Company Organization Designation 
Authorization (ODA) that has been authorized by the Manager, Seattle 
ACO Branch, FAA, 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.

(j) Related Information

    For more information about this AD, contact Eric Lin, Aerospace 
Engineer, Airframe Section, FAA, Seattle ACO Branch, 2200 South 
216th St., Des Moines, WA 98198; phone and fax: 206-231-3523; email: 
[email protected].

(k) 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 Requirements Bulletin 747-57A2367 RB, dated 
November 15, 2019.
    (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-
5600; phone: 562-797-1717; internet: https://www.myboeingfleet.com.
    (4) You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 2200 
South 216th St., Des Moines, WA. For information on the availability 
of this material at the FAA, call 206-231-3195.
    (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, email [email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on January 14, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2021-03593 Filed 2-22-21; 8:45 am]
BILLING CODE 4910-13-P
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