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Rules and Regulations
Federal Register Vol. 86, No. 114
Wednesday, June 16, 2021

This section of the FEDERAL REGISTER
contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210446; Project Identifier 2018SW029AD; Amendment 3921590; AD 20211203
RIN 2120AA64

Airworthiness Directives; Leonardo S.p.a.
Federal Aviation Administration FAA, DOT.
ACTION: Final rule; request for comments.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain Leonardo S.p.a. Model AW189
helicopters. This AD was prompted by a report of the bubble window departing from the helicopter during flight. This AD requires installation of a new improved bubble window kit, as specified in a European Aviation Safety Agency now the European Union Aviation Safety Agency EASA AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD becomes effective July 1, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of July 1, 2021.
The FAA must receive comments on this AD by August 2, 2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https www.regulations.gov. Follow the instructions for submitting comments.
Fax: 2024932251.
Mail: U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.

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SUMMARY:

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Hand Delivery: Deliver to Mail address above between 9 a.m. and 5
p.m., Monday through Friday, except Federal holidays.
For material incorporated by reference IBR in this AD, contact the EASA, Konrad-Adenauer-Ufer 3, 50668
Cologne, Germany; phone: +49 221 8999
000; email: ADs@easa.europa.eu;
internet: www.easa.europa.eu. You may find this material on the EASA website at https ad.easa.europa.eu. You may view this material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 8172225110.
It is also available in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0446.

This AD was prompted by a report of a bubble window departing from the helicopter during flight. The FAA is issuing this AD to address degradation of the installation of the bubble windows, which could cause loss of a bubble window during flight, possibly resulting in damage to the helicopter and injury to persons on the ground. See the MCAI for additional background information.

Examining the AD Docket
FAAs Determination This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the State of Design Authority, the FAA has been notified of the unsafe condition described in the MCAI referenced above. The FAA is issuing this AD after evaluating all pertinent information and determining that the unsafe condition exists and is likely to exist or develop on other products of the same type design.

You may examine the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0446; 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 AD, any comments received, and other information. The street address for Docket Operations is listed above.
Comments will be available in the AD
docket shortly after receipt.
FOR FURTHER INFORMATION CONTACT:

Andrea Jimenez, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 1600
Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 5162287330; fax:
5167945531; email: 9-avs-nyaco-cos@
faa.gov.
SUPPLEMENTARY INFORMATION:

Background The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20180082, dated April 11, 2018 EASA
AD 20180082 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for Leonardo S.p.a.
Model AW189 helicopters, if equipped with bubble windows kit part number 8G5620F00111.

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Related IBR Material Under 1 CFR Part 51
EASA AD 20180082 specifies procedures for, among other actions, modifying the left-hand and right-hand bubble windows with an improved bubble window kit. This material 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.

Requirements of This AD
This AD requires accomplishing the actions specified in EASA AD 2018
0082, described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this AD and except as discussed under Differences Between this AD and the MCAI.
Explanation of Required Compliance Information In the FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA initially worked with Airbus and EASA to develop a process to use certain EASA ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has since coordinated with other manufacturers and civil aviation authorities CAAs to
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