61676 Federal Register / Vol. 86, No. 213 / Monday, November 8, 2021 / Rules and Regulations 
(c) Applicability 
This AD applies to all Airbus SAS Model 
A319–171N airplanes; Model A320–271N, 
–272N, and –273N airplanes; and Model A321–271N, –272N, –271NX, and –272NX airplanes, certificated in any category. 
(d) Subject 
Air Transport Association (ATA) of 
America Code 29, Hydraulic power. (e) Unsafe Condition 
This AD was prompted by a report of 
damage found at the rod-eye ends of two 
original rods installed to maintain an interface plate between the pylon and nacelle, and the need to clarify certain existing requirements from AD 2021–18–08. The FAA is issuing this AD to address damage that could lead to rupture of the rod- eye ends, which could result in fuel and hydraulic pipe chafing, consequent fuel or hydraulic leakage, and possible fire. 
(f) Compliance 
Comply with this AD within the 
compliance times specified, unless already 
done. 
(g) Requirements 
Except as specified in paragraph (h) of this 
AD: Comply with all required actions and 
compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2021–0177R1, dated September 21, 2021 (EASA AD 2021– 0177R1). 
(h) Exceptions to EASA AD 2021–0177R1 
(1) Where EASA AD 2021–0177R1 refers to 
‘‘06 August 2021 [the effective date of the 
original issue of this AD],’’ this AD requires using September 14, 2021 (the effective date of AD 2021–18–08). 
(2) Where EASA AD 2021–0177R1 refers to 
its effective date, this AD requires using the effective date of this AD. 
(3) Paragraph (4) of EASA AD 2021– 
0177R1 specifies to ‘‘contact Airbus for approved instructions and, within the compliance time(s) specified in those instructions, accomplish those instructions accordingly’’ as an alternative corrective action if a defect is detected during inspection of an updated rod. As of the effective date of this AD, however, for that alternative, this AD requires repair of the defect before further flight using a method approved by the Manager, Large Aircraft Section, International Validation Branch, FAA; or EASA; or Airbus SAS’s EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. 
(4) The ‘‘Remarks’’ section of EASA AD 
2021–0177R1 does not apply to this AD. 
(i) Clarification of EASA AD 2021–0177R1 
Paragraph (8) of EASA AD 2021–0177R1 
allows installation of an affected part if it is 
serviceable and inspected within 750 flight hours after installation. The Definitions section of EASA AD 2021–0177R1 requires that a serviceable affected part pass an inspection before the next flight after installation. Therefore, this AD allows installation of an affected serviceable part after the effective date of this AD if it is 
inspected before further flight after installation and 750 flight hours thereafter. All other provisions of paragraph (8) and Note 2 of EASA AD 2021–0177R1 apply to this AD, including the repetitive inspection of that part as required by paragraph (1) or (2) of EASA AD 2021–0177R1. 
(j) Additional AD Provisions 
The following provisions also apply to this 
AD: 
(1) Alternative Methods of Compliance 
(AMOCs): The Manager, Large Aircraft 
Section, International Validation 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 responsible Flight Standards Office, as appropriate. If sending information directly to the Large Aircraft Section, International Validation Branch, send it to the attention of the person identified in paragraph (k) of this AD. Information may be emailed to: 9-AVS-AIR- 730-AMOC@faa.gov. Before using any 
approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards 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, Large Aircraft Section, International Validation Branch, FAA; or EASA; or Airbus SAS’s EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. 
(3) Required for Compliance (RC): Except 
as required by paragraph (j)(2) of this AD, if any service information contains procedures or tests that are identified as RC, those procedures and tests must be done to comply with this AD; any procedures or tests that are not identified as RC are recommended. Those procedures and tests that are not identified as RC may be deviated from using accepted methods in accordance with the operator’s maintenance or inspection program without obtaining approval of an AMOC, provided the procedures and tests identified as RC can be done and the airplane can be put back in an airworthy condition. Any substitutions or changes to procedures or tests identified as RC require approval of an AMOC. 
(k) Related Information 
For more information about this AD, 
contact Sanjay Ralhan, Aerospace Engineer, 
Large Aircraft Section, FAA, International Validation Branch, 2200 South 216th St., Des Moines, WA 98198; telephone and fax 206– 231–3223; email Sanjay.Ralhan@faa.gov. 
(l) Material Incorporated by Reference 
(1) The Director of the Federal Register 
approved the incorporation by reference 
(IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. 
(2) You must use this service information 
as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) European Union Aviation Safety Agency 
(EASA) AD 2021–0177R1, dated September 21, 2021. 
(ii) [Reserved] (3) For EASA AD 2021–0177R1, contact 
EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; internet 
www.easa.europa.eu. You may find this 
EASA AD on the EASA website at https://ad.easa.europa.eu. 
(4) You may view this material 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. This material may be found in the AD docket at https://www.regulations.gov by searching for and 
locating Docket No. FAA–2021–0950. 
(5) You may view this material that is 
incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email fr.inspection@nara.gov, or go to: https://
www.archives.gov/federal-register/cfr/ibr- locations.html. 
Issued on October 27, 2021. 
Lance T. Gant, 
Director, Compliance & Airworthiness 
Division, Aircraft Certification Service. 
[FR Doc. 2021–24447 Filed 11–4–21; 11:15 am] 
BILLING CODE 4910–13–P 
DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 39 
[Docket No. FAA–2021–0257; Project 
Identifier MCAI–2020–00712–E; Amendment 39–21772; AD 2021–21–12] 
RIN 2120–AA64 
Airworthiness Directives; Rolls-Royce 
Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls- Royce Deutschland GmbH, Formerly BMW Rolls-Royce GmbH) Turbofan Engines 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final rule. 
SUMMARY : The FAA is adopting a new 
airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (RRD) BR700–710A2–20 model turbofan engines. This AD was prompted by flight data obtained from airplanes equipped with certain Rockwell Collins avionics and auto-throttle systems that demonstrated significant oscillation of the engine rotor revolution speed during flight. This AD requires initial and repetitive recalculation of the consumed and remaining service life of certain life- limited parts (LLPs). This AD also 
VerDate Sep<11>2014 16:24 Nov 05, 2021 Jkt 256001 PO 00000 Frm 00012 Fmt 4700 Sfmt 4700 E:\FR\FM\08NOR1.SGM 08NOR1lotter on DSK11XQN23PROD with RULES161677 Federal Register / Vol. 86, No. 213 / Monday, November 8, 2021 / Rules and Regulations 
requires removal of an LLP prior to its 
approved life limit or within 90 days after the effective date of this AD, whichever occurs later. The FAA is issuing this AD to address the unsafe condition on these products. 
DATES : This AD is effective December 
13, 2021. 
The Director of the Federal Register 
approved the incorporation by reference of a certain publication listed in this AD as of December 13, 2021. 
ADDRESSES : For service information 
identified in this final rule, contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, Dahlewitz, 15827 Blankenfelde-Mahlow, Germany; phone: +49 (0) 33 7086–4040; website: https:// 
www.rolls-royce.com/contact-us.aspx. 
You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (781) 238–7759. It is also available at https://www.regulations.gov by 
searching for and locating Docket No. FAA–2021–0257. 
Examining the AD Docket 
You may examine the AD docket at 
https://www.regulations.gov by 
searching for and locating Docket No. 
FAA–2021–0257; 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, the mandatory continuing airworthiness information (MCAI), 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 : 
Wego Wang, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7134; fax: (781) 238–7199; email: Wego.Wang@faa.gov. 
SUPPLEMENTARY INFORMATION : 
Background 
The FAA issued a notice of proposed 
rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain RRD BR700–710A2–20 model turbofan engines. The NPRM published in the Federal Register on April 2, 2021 (86 FR 17326). The NPRM was prompted by flight data obtained from airplanes equipped with certain Rockwell Collins avionics and auto- throttle systems that demonstrated significant oscillation of the engine rotor revolution speed during flight. In the NPRM, the FAA proposed to require initial and repetitive recalculation of the consumed and remaining service life of certain LLPs. The NPRM also proposed to require removal of an LLP prior to its approved life limit or within 90 days after the effective date of this AD, whichever occurs later. The FAA is issuing this AD to address the unsafe condition on these products. 
The European Union Aviation Safety 
Agency (EASA), which is the Technical Agent for the Member States of the European Community, has issued EASA AD 2018–0268, dated December 11, 2018 and corrected on February 20, 2019 (referred to after this as ‘‘the MCAI’’), to address the unsafe condition on these products. The MCAI states: 
Flight data obtained from aeroplanes 
equipped with certain Rockwell Collins 
avionics and auto-throttle system demonstrated significant oscillation of the engine rotor revolution speed during cruise. Analysis indicates that this affects the service life of the affected LLP. 
This condition, if not corrected, may lead 
to failure of an affected LLP, possibly resulting in release of high-energy debris, with consequent damage to, and/or reduced control of, the aeroplane. To address this potentially unsafe condition, RRD issued the NMSB, providing instructions to recalculate the consumed and remaining service life of the affected LLP. 
For the reasons described above, this 
[EASA] AD requires repetitive recalculation 
of the service life (consumed and remaining) of each affected LLP and, depending on the results, replacement of each affected LLP before exceeding the life limit, taking the re- calculated life consumption into account. 
You may obtain further information 
by examining the MCAI in the AD 
docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0257. 
Discussion of Final Airworthiness 
Directive 
Comments 
The FAA received comments from 
one commenter, NetJets Aviation (NJA). 
The following presents the comments received on the NPRM and the FAA’s response to each comment. 
Request To Confirm Compliance With 
Previous Action 
NJA asked if they are in compliance 
with this AD if they performed the required actions using Bombardier Service Bulletin (SB) 700–34–5021 or Bombardier SB 700–34–6021, revisions earlier than Revision 3, dated January 5, 2018, as applicable. NJA reasoned that paragraph (c), Applicability, of the proposed AD references only Revision 3 of Bombardier SB 700–34–5021 and Bombardier SB 700–34–6021 (Bombardier SBs). NJA states that it performed the required actions using Revision 2 of the Bombardier SBs before the effective date of this AD. NJA also referenced language from Revision 3 of the Bombardier SBs that indicates no further action is necessary if operators performed the action using earlier revisions of the Bombardier SBs. 
The FAA notes that NJA would be in 
compliance with the required actions of this AD if they performed those actions using the earlier versions of the Bombardier SBs to meet the requirements of this AD. The FAA updated paragraph (h), Credit for Previous Actions, of this AD to give credit for using earlier revisions of the Bombardier SBs if the actions were performed before the effective date of this AD. 
Request To Confirm Compliance for 
Simultaneous Actions 
NJA asked if they would be in 
compliance with the required actions of this AD, based on paragraph (h), Credit for Previous Actions, if they complied with the Bombardier SBs and RRD Alert Non-Modification Service Bulletin SB– BR700–72–A900584, Revision 2, dated November 22, 2017 (the NMSB), at the same time before the fleet accumulated 500 flight cycles. NJA indicated that the Accomplishment Instructions, paragraphs 3.A.(1) and (2), of the NMSB apply only to the low-pressure compressor (LPC) disk whereas this AD applies to all LLPs. 
The FAA notes that NJA would be in 
compliance with the replacement of the LPC disk required by paragraph (g)(3) of this AD if they performed the action before the effective date of this AD. Paragraph (f) of this AD mandates compliance with this AD within the compliance times specified, unless already done. 
Update to Service Information 
The FAA determined the need to 
incorporate the latest service 
information in this AD. The FAA revised the reference to Bombardier SB 700–34–5021 in paragraph (c) of this AD from Revision 03, dated January 5, 2018, to Revision 04, dated February 11, 2021, or earlier revision, and Bombardier SB 700–34–6021 in paragraph (c) of this AD from Revision 03, dated January 5, 2018, to Revision 04, dated February 11, 2021, or earlier revision. This change does not change the number of affected engines that the FAA estimated in the NPRM and imposes no additional burden on operators who are required to comply with this AD. 
VerDate Sep<11>2014 16:24 Nov 05, 2021 Jkt 256001 PO 00000 Frm 00013 Fmt 4700 Sfmt 4700 E:\FR\FM\08NOR1.SGM 08NOR1lotter on DSK11XQN23PROD with RULES161678 Federal Register / Vol. 86, No. 213 / Monday, November 8, 2021 / Rules and Regulations 
Conclusion 
The FAA reviewed the relevant data, 
considered any comments received, and 
determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. Except for minor editorial changes, and any other changes described previously, this AD is adopted as proposed in the NPRM. None of the changes will increase the economic burden on any operator. 
Related Service Information Under 1 
CFR Part 51 
The FAA reviewed RRD Alert Non- 
Modification Service Bulletin SB– BR700–72–A900584, Revision 2, dated 
November 22, 2017. The NMSB describes procedures for amending flight cycle counting requirements for affected LLPs on RRD BR700–710A2–20 model turbofan engines. 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 
ADDRESSES . 
Other Related Service Information 
The FAA reviewed Bombardier SB 
700–34–5021, Revision 04, dated February 11, 2021, and Bombardier SB 700–34–6021, Revision 04, dated February 11, 2021. These SBs describe procedures for the implementation of 
the Global Vision Flight Deck Version 5 (V5) software load on Bombardier Inc. Model BD–700–1A11 and BD–700– 1A10 airplanes, respectively. 
Costs of Compliance 
The FAA estimates that this AD 
affects 284 engines installed on 
airplanes of U.S. registry. 
The FAA estimates the following 
costs to comply with this AD: 
ESTIMATED COSTS  
Action Labor cost Parts cost Cost per 
product Cost on U.S. 
operators 
Recalculate service life for affected LLPs ...... 20 work-hours × $85 per hour = $85 ............. $0 $1,700 $482,800 
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. 
List of Subjects in 14 CFR Part 39 
Air transportation, Aircraft, Aviation 
safety, Incorporation by reference, 
Safety. 
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 
■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: 
2021–21–12 Rolls-Royce Deutschland Ltd & 
Co KG (Type Certificate previously held 
by Rolls-Royce Deutschland GmbH, formerly BMW Rolls-Royce GmbH): Amendment 39–21772; Docket No. FAA–2021–0257; Project Identifier MCAI–2020–00712–E. 
(a) Effective Date 
This airworthiness directive (AD) is 
effective December 13, 2021. 
(b) Affected ADs 
None. (c) Applicability 
This AD applies to Rolls-Royce 
Deutschland Ltd & Co KG (Type Certificate 
previously held by Rolls-Royce Deutschland GmbH, formerly BMW Rolls-Royce GmbH) (RRD) BR700–710A2–20 model turbofan engines: 
(1) Installed and operated on a Bombardier 
Model BD–700–1A10 and BD–700–1A11 
airplane, with serial number 9381, 9386, 9401, or 9432 to 9786, inclusive, that have not incorporated Bombardier Service Bulletin (SB) 700–34–5021, Revision 04, dated February 11, 2021, or earlier revision, or Bombardier SB 700–34–6021, Revision 04, dated February 11, 2021, or earlier revision, as applicable, referred to after this as a ‘‘pre- mod airplane,’’ or 
(2) Installed and operated on a pre-mod 
airplane at any time after January 1, 2017. 
(d) Subject 
Joint Aircraft System Component (JASC) 
Code 7230, Turbine Engine Compressor 
Section. 
(e) Unsafe Condition 
This AD was prompted by flight data 
obtained from airplanes equipped with 
certain Rockwell Collins avionics and auto- throttle systems which demonstrated significant oscillation of the engine rotor revolution speed during flight. The FAA is issuing this AD to prevent failure of an affected life-limited part (LLP). The unsafe condition, if not addressed, could result in uncontained release of high-energy debris, damage to the engine, and damage to the airplane. 
(f) Compliance 
Comply with this AD within the 
compliance times specified, unless already 
done. 
VerDate Sep<11>2014 16:24 Nov 05, 2021 Jkt 256001 PO 00000 Frm 00014 Fmt 4700 Sfmt 4700 E:\FR\FM\08NOR1.SGM 08NOR1lotter on DSK11XQN23PROD with RULES161679 Federal Register / Vol. 86, No. 213 / Monday, November 8, 2021 / Rules and Regulations 
(g) Required Actions 
(1) Within 90 days after the effective date 
of this AD, recalculate the consumed and 
remaining service life of each affected LLP using Accomplishment Instructions, paragraph 3.D., of RRD Alert Non- Modification Service Bulletin (NMSB) SB– BR700–72–A900584, Revision 2, dated November 22, 2017 (the NMSB). 
(2) For engines installed and operated on 
a pre-mod airplane, after performing the initial recalculations required by paragraph 
(g)(1) of this AD, for each flight, calculate the consumed and remaining service life of each affected LLP using paragraph 3.D. of the Accomplishment Instructions of the NMSB. 
(3) Remove each affected LLP prior to 
exceeding its approved life limit or within 90 days after the effective date of this AD, whichever occurs later. 
(h) Credit for Previous Actions 
You may take credit for the recalculation 
of the consumed and remaining service life 
of each LLP required by paragraph (g)(1) of this AD if the action was performed before the effective date of this AD using RRD Alert NMSB SB–BR700–72–A900584, Revision 1, dated October 5, 2017, or original issue, dated January 31, 2017. 
(i) Definition 
For the purpose of this AD, an affected LLP 
is: a low-pressure compressor (LPC) disk, 
LPC fan blade, fan shaft, low-pressure turbine (LPT) stage 1 disk, LPT stage 2 disk, LPT rotor shaft and annulus filler, high-pressure compressor (HPC) stage 1–6 rotor disk, HPC stage 7–10 rotor disk, curvic ring, high- pressure turbine (HPT) stage 1 disk, and an HPT stage 2 disk. 
(j) Alternative Methods of Compliance 
(AMOCs) 
(1) The Manager, ECO Branch, FAA, has 
the authority to approve AMOCs for this AD, 
if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (k)(1). You may email your request to: ANE-AD-AMOC@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. 
(k) Related Information 
(1) For more information about this AD, 
contact Wego Wang, Aviation Safety 
Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7134; fax: (781) 238–7199; email: Wego.Wang@faa.gov. 
(2) Refer to European Union Aviation 
Safety Agency (EASA) AD 2018–0268, dated December 11, 2018, for more information. You may examine the EASA AD in the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA– 2021–0257. (l) Material Incorporated by Reference 
(1) The Director of the Federal Register 
approved the incorporation by reference 
(IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. 
(2) You must use this service information 
as applicable to do the actions required by this AD, unless the AD specifies otherwise. 
(i) Rolls-Royce Deutschland Ltd & Co KG 
Alert Non-Modification Service Bulletin SB– BR700–72–A900584, Revision 2, dated November 22, 2017. 
(ii) [Reserved] (3) For Rolls-Royce Deutschland service 
information identified in this AD, contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, Dahlewitz, 15827 Blankenfelde-Mahlow, Germany; phone: +49 (0) 33 7086–4040; website: https://www.rolls- royce.com/contact-us.aspx. 
(4) You may view this service information 
at FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (781) 238–7759. 
(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: fr.inspection@nara.gov, or go to: 
https://www.archives.gov/federal-register/cfr/ ibr-locations.html. 
Issued on October 8, 2021. 
Lance T. Gant, 
Director, Compliance & Airworthiness 
Division, Aircraft Certification Service. 
[FR Doc. 2021–24182 Filed 11–5–21; 8:45 am] 
BILLING CODE 4910–13–P 
DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 39 
[Docket No. FAA–2021–0503; Project 
Identifier AD–2021–00163–T; Amendment 39–21769; AD 2021–21–09] 
RIN 2120–AA64 
Airworthiness Directives; The Boeing 
Company Airplanes 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final rule. 
SUMMARY : The FAA is superseding 
Airworthiness Directive (AD) 2005–05– 18, which applied to certain The Boeing Company Model 737–600, –700, –700C, –800, and –900 series airplanes. AD 2005–05–18 required repetitive inspections for cracking of the webs of the aft pressure bulkhead at a certain body station, and corrective action if necessary. This AD was prompted by cracking found in that inspection area on airplanes not identified in the applicability of AD 2005–05–18. This AD retains the requirements of AD 2005–05–18, revises the applicability to include additional airplanes, and adds an inspection for existing repairs on the newly added airplanes. The FAA is issuing this AD to address the unsafe condition on these products. 
DATES : This AD is effective December 
13, 2021. 
The Director of the Federal Register 
approved the incorporation by reference of a certain publication listed in this AD as of December 13, 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; telephone 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 at https://www.regulations.gov by searching for 
and locating Docket No. FAA–2021– 0503. 
Examining the AD Docket 
You may examine the AD docket at 
https://www.regulations.gov by 
searching for and locating Docket No. 
FAA–2021–0503; 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 : 
Wayne Lockett, Aerospace Engineer, Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206– 231–3524; email: wayne.lockett@faa.gov. 
SUPPLEMENTARY INFORMATION : 
Background 
The FAA issued a notice of proposed 
rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2005–05–18, Amendment 39–14007 (70 FR 12410, March 14, 2005) (AD 2005–05–18). AD 2005–05–18 applied to certain The Boeing Company Model 737–600, –700, –700C, –800, and –900 series airplanes. The NPRM published in the Federal 
VerDate Sep<11>2014 16:24 Nov 05, 2021 Jkt 256001 PO 00000 Frm 00015 Fmt 4700 Sfmt 4700 E:\FR\FM\08NOR1.SGM 08NOR1lotter on DSK11XQN23PROD with RULES1