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Federal Register / Vol. 86, No. 170 / Tuesday, September 7, 2021 / Proposed Rules DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20200904; Project Identifier 2019SW041AD
RIN 2120AA64

Airworthiness Directives; Airbus Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Supplemental notice of proposed rulemaking SNPRM.
AGENCY:

The FAA is revising a supplemental notice of proposed rulemaking SNPRM that applied to certain Airbus Helicopters Model EC225LP helicopters. This action revises the SNPRM by proposing to require the installation of an improved part, which would also provide a terminating action for the proposed requirements. The FAA is proposing this airworthiness directive AD to address the unsafe condition on these products. Since these actions would impose an additional burden over those in the SNPRM, the agency is requesting comments on this SNPRM.
DATES: The comment period for the SNPRM published in the Federal Register on May 10, 2021 86 FR 24783
is reopened.
The FAA must receive comments on this SNPRM by October 22, 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: 202 4932251.
Mail: U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Hand Delivery: Deliver to Mail address between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this SNPRM, contact Airbus Helicopters, 2701 North Forum Drive, Grand Prairie, TX 75052; telephone 972 6410000 or 800 2320323; fax 972 6413775; or at https
www.airbus.com/helicopters/services/
technical-support.html. You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX

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SUMMARY:

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76177. For information on the availability of this material at the FAA, call 817 2225110.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20200904; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains the first SNPRM, this SNPRM, the European Union Aviation Safety Agency EASA
AD 20210156, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Hal Jensen, Aerospace Engineer, Operational Safety Branch, Compliance &
Airworthiness Division, FAA, 950
LEnfant Plaza N SW, Washington, DC
20024; telephone 202 2679167; email hal.jensen@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.
FAA20200904; Project Identifier 2019SW041AD 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 again revise 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 proposed AD.
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 SNPRM
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 SNPRM, it is
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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 SNPRM. Submissions containing CBI should be sent to Hal Jensen, Aerospace Engineer, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 950 LEnfant Plaza N
SW, Washington, DC 20024; telephone 202 2679167; email hal.jensen@
faa.gov. Any commentary that the FAA
receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background The FAA issued an SNPRM to amend 14 CFR part 39 by adding an AD that would apply to Airbus Helicopters Model EC225LP helicopters, with a lefthand side LH engine fuel supply fuel supply hose part number P/N
704A34416087 installed. The SNPRM
published in the Federal Register on May 10, 2021 86 FR 24783. In the SNPRM, the FAA proposed to require visually inspecting the LH fuel supply hose P/N 704A34416087 for twisting, and if needed, borescope inspecting the entire length of the inside of the fuel supply hose for twisting. Depending on the inspection results, the SNPRM
would require reinstalling or removing the fuel supply hose from service.
Additionally, the SNPRM would prohibit installing a certain partnumbered LH fuel supply hose on any helicopter unless that LH fuel supply hose is installed by following certain procedures described in the manufacturers service bulletin.
The SNPRM was prompted by EASA
AD 20190092, dated April 26, 2019
EASA AD 20190092, issued by EASA, which is the Technical Agent for the Member States of the European Union, to correct an unsafe condition for Airbus Helicopters formerly Eurocopter Model EC 225 LP
helicopters, all serial numbers. EASA
advised that an occurrence was reported where during an in-flight single engine power check, the LH side engine experienced a power loss. EASA stated that a subsequent investigation determined that the fuel flow to the affected engine was restricted by a twisted fuel supply hose. EASA stated that this condition, if not detected and corrected, could lead to a decrease of the LH engine power when accelerating to the power setting corresponding to OEI power, and subsequent reduced control of the helicopter.

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