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Federal Register / Vol. 86, No. 160 / Monday, August 23, 2021 / Proposed Rules
FOR FURTHER INFORMATION CONTACT:

Jacob Fitch, Aerospace Engineer, COS
Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 10101
Hillwood Pkwy., Fort Worth, TX 76177;
telephone 817 2224130; email jacob.fitch@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include Docket No.
FAA20210687; Project Identifier 2019SW029AD at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend this proposal because of those comments.
Except for Confidential Business Information CBI as described in the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to https
www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this NPRM.

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Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner.
Under the Freedom of Information Act FOIA 5 U.S.C. 552, CBI is exempt from public disclosure. If your comments responsive to this NPRM
contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this NPRM, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI
as PROPIN. The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this NPRM. Submissions containing CBI
should be sent to Jacob Fitch, Aerospace
Engineer, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 817 222
4130; email jacob.fitch@faa.gov. Any commentary that the FAA receives that is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20190039, dated February 20, 2019
EASA AD 20190039, to correct an unsafe condition for certain Leonardo S.p.A. Model AW189 helicopters.
This proposed AD was prompted by a report that a number of fairleads that support the engine combustion chamber D1 drain hose showed evidence of heat damage. The FAA is proposing this AD
to address heat damage, which in a case where the right-hand engine is operated in the one engine inoperative OEI
rating, the D1 drain pipe could transfer so much heat to the nearby fuel system vent pipe that its internal surface temperature could exceed the autoignition temperature for fuel. The unsafe condition, if not addressed, could result in undetected fire ignition in the fuel tank bay with consequent loss of the helicopter. See EASA AD 20190039 for additional background information.
Related Service Information Under 1
CFR Part 51
EASA AD 20190039 requires modifying the helicopter by installing the engine combustion chamber D1
drain assembly, part number 8G7170P00111.
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.
FAAs Determination This helicopter has been approved by EASA and is approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the European Union, EASA has notified the FAA
about the unsafe condition described in its AD. The FAA is proposing this AD
after evaluating all known relevant
information and determining that the unsafe condition described previously is likely to exist or develop on other helicopters of the same type design.
Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified in EASA AD 20190039, described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this proposed AD.
Explanation of Required Compliance Information In the FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA developed a process to use some civil aviation authority CAA
ADs as the primary source of information for compliance with requirements for corresponding FAA
ADs. The FAA has been coordinating this process with manufacturers and CAAs. As a result, the FAA proposes to incorporate EASA AD 20190039 by reference in the FAA final rule. This proposed AD would, therefore, require compliance with EASA AD 20190039
in its entirety through that incorporation, except for any differences identified as exceptions in the regulatory text of this proposed AD.
Using common terms that are the same as the heading of a particular section EASA AD 20190039 does not mean that operators need comply only with that section. For example, where the AD
requirement refers to all required actions and compliance times, compliance with this AD requirement is not limited to the section titled Required Actions and Compliance Times in EASA AD 20190039.
Service information required by EASA
AD 20190039 for compliance will be available at https www.regulations.gov by searching for and locating Docket No.
FAA20210687 after the FAA final rule is published.
Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 4
helicopters of U.S. registry. The FAA
estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS
Action
Labor cost
Modification

4 work-hours $85 per hour = $340

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Parts cost $2,557

E:FRFM23AUP1.SGM

23AUP1

Cost per product $2,897

Cost on U.S.
operators $11,588