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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 NonModification Service Bulletin NMSB SB
BR70072A900584, 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 g1 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 g1 of this AD if the action was performed before the effective date of this AD using RRD Alert NMSB SBBR70072A900584, 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 16 rotor disk, HPC
stage 710 rotor disk, curvic ring, highpressure turbine HPT stage 1 disk, and an HPT stage 2 disk.

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 k1. 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.

lotter on DSK11XQN23PROD with RULES1

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
2387134; fax: 781 2387199; email:
Wego.Wang@faa.gov.
2 Refer to European Union Aviation Safety Agency EASA AD 20180268, 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
20210257.

16:24 Nov 05, 2021

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Issued on October 8, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202124182 Filed 11521; 8:45 am BILLING CODE 491013P

j Alternative Methods of Compliance AMOCs
VerDate Sep<11>2014

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. 552a 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
BR70072A900584, 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 70864040; website: https www.rollsroyce.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 2387759.
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.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210503; Project Identifier AD202100163T; Amendment 3921769; AD 20212109
RIN 2120AA64

Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is superseding Airworthiness Directive AD 200505
18, which applied to certain The Boeing Company Model 737600, 700, 700C, 800, and 900 series airplanes. AD
20050518 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
SUMMARY:

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on airplanes not identified in the applicability of AD 20050518. This AD retains the requirements of AD
20050518, 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
110SK57, Seal Beach, CA 907405600;
telephone 5627971717; 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 2062313195.
It is also available at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0503.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210503; 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 W12140, 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
2313524; 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 20050518, Amendment 3914007 70 FR 12410, March 14, 2005 AD 20050518. AD
20050518 applied to certain The Boeing Company Model 737600, 700, 700C, 800, and 900 series airplanes.
The NPRM published in the Federal
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