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Federal Register / Vol. 86, No. 35 / Wednesday, February 24, 2021 / Rules and Regulations
p Material Incorporated by Reference
DEPARTMENT OF TRANSPORTATION

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 this AD specifies otherwise.
3 The following service information was approved for IBR on March 31, 2021.
i European Union Aviation Safety Agency EASA AD 20200173, dated August 5, 2020.
ii Reserved 4 The following service information was approved for IBR on August 26, 2019 84 FR
35028, July 22, 2019.
i ATR ATR72 Time Limits Document, Revision 16, dated January 30, 2018.
ii Reserved 5 For EASA AD 20200173, contact the 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.
6 For ATR service information identified in this AD, contact ATRGIE Avions de Transport Regional, 1 Allee Pierre Nadot, 31712 Blagnac Cedex, France; telephone +33
0 5 62 21 62 21; fax +33 0 5 62 21 67 18;
email continued.airworthiness@atraircraft.com; internet https www.atraircraft.com.
7 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 2062313195. This material may be found in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA20200972.
8 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 fedreg.legal@
nara.gov, or go to: https www.archives.gov/
federal-register/cfr/ibr-locations.html.
Issued on January 22, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202103599 Filed 22321; 8:45 am
khammond on DSKJM1Z7X2PROD with RULES

BILLING CODE 491013P

Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20201021; Project Identifier AD202000847T; Amendment 3921412; AD 20210309
RIN 2120AA64

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 all The Boeing Company Model 727 series airplanes. This AD was prompted by a determination that excessive sealant coating on internal wing Structural Significant Items SSIs may not reveal cracks during inspections required by AD 981103 R1. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate inspections that will give no less than the required damage tolerance rating DTR for certain SSIs of the wing.
This AD also requires repetitive inspections for cracking of the affected SSIs and repair if necessary. The FAA
is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective March 31, 2021.
The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD
as of March 31, 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 on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20201021.
SUMMARY:

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. FAA2020
1021; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday
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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:
Mohit Garg, Aerospace Engineer, Airframe Section, FAA, Los Angeles ACO Branch, 3960 Paramount Boulevard, Lakewood, CA 907124137;
phone: 5626275264; fax: 562627
5210; email: mohit.garg@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to all The Boeing Company Model 727 airplanes. The NPRM published in the Federal Register on November 27, 2020 85 FR 75969. The NPRM was prompted by a determination that excessive sealant coating on internal wing SSIs may not reveal cracks during inspections required by AD 981103
R1, Amendment 3910983 64 FR 989, January 7, 1999 AD 981103 R1. The NPRM proposed to require revising the existing maintenance or inspection program, as applicable, to incorporate inspections that will give no less than the required DTR for certain SSIs of the wing. The NPRM also proposed to require repetitive inspections for cracking of the affected SSIs and repair if necessary.
The FAA is issuing this AD to address excessive sealant coating on internal wing SSIs that may prevent the detection of cracks during inspections.
This condition, if not addressed, could result in propagation of structural cracks that could lead to the inability of a wing SSI to sustain limit load and result in loss of control of the airplane.
Comments The FAA gave the public the opportunity to participate in developing this final rule. The FAA has considered the comment received. Boeing indicated its support for the NPRM.
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
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