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Federal Register / Vol. 86, No. 87 / Friday, May 7, 2021 / Proposed Rules
the FADEC MN4 microprocessor solder ball.
The unsafe condition, if not addressed, could result in loss of engine thrust control and reduced control of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 Within the following compliance times after the effective date of this AD, replace the full authority digital engine control FADEC
integrated circuit MN4 microprocessor using an approved overhaul procedure:
i For a FADEC MN4 microprocessor with 10,500 or more cycles since new CSN, replace the FADEC MN4 microprocessor before accumulating 500 additional cycles on the FADEC MN4 microprocessor.
ii For a FADEC MN4 microprocessor with 5,000 CSN or more, but fewer than 10,500
CSN, replace the FADEC MN4
microprocessor at the next FADEC
component shop visit or before accumulating 11,000 CSN on the FADEC MN4
microprocessor, whichever occurs first.
2 Thereafter, repeat the replacement of the FADEC MN4 microprocessor at the first FADEC component shop visit after accumulating 5,000 CSN since the last replacement but before accumulating 11,000
CSN since the last replacement.
h Installation Prohibition After the effective date of this AD, do not install onto any engine any FADEC with a main channel board that was subject to more than three replacements of the FADEC MN4
microprocessor.
i Definition 1 For the purpose of this AD, an approved overhaul procedure is one of the following:
i Replacement of the FADEC MN4
microprocessor using FADEC Internationalapproved maintenance procedures; or ii Replacement of the FADEC MN4
microprocessor using the Accomplishment Instructions, paragraph 3.A., of GE GE90100
Service Bulletin 730118, Revision 01, dated April 27, 2021.
2 For the purpose of this AD, a FADEC
component shop visit is the induction of the FADEC into a repair facility to perform internal maintenance on the FADEC.
j Alternative Methods of Compliance AMOCs 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 Related Information. 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
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of the local flight standards district office/
certificate holding district office.
k Related Information 1 For more information about this AD, contact Stephen Elwin, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781
2387236; fax: 781 2387199; email:
stephen.l.elwin@faa.gov.
2 For service information identified in this AD, contact General Electric Company, 1 Neumann Way, Cincinnati, OH 45215;
phone: 513 5523272; email:
aviation.fleetsupport@ae.ge.com; website:
www.ge.com. You may view this referenced service information at the 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.
Issued on April 28, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202109291 Filed 5621; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210175; Project Identifier 2001SW33AD
RIN 2120AA64

Airworthiness Directives; Airbus Helicopters Type Certificate Previously Held by Eurocopter France Federal Aviation Administration FAA, DOT.
ACTION: Supplemental notice of proposed rulemaking SNPRM;
reopening of comment period.
AGENCY:

The FAA is revising a SNPRM
for all Eurocopter France now Airbus Helicopters Model SA365N, SA
365N1, AS365N2, AS 365 N3, and SA
366G1 helicopters. The SNPRM retained the proposed requirements in the notice of proposed rulemaking NPRM and added recurring inspections and references to an engineering report that lists approved U.S. alternative fasteners and materials that may be used in any required repairs. The FAA is reopening the comment period because a significant amount of time has elapsed since the SNPRM was published. This proposed AD would require measuring the 9-degree frame flange frame for the correct edge distance of the four attachment holes for the stretcher support and inspecting for cracks, and repairing the frame, if necessary, as
SUMMARY:

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specified in two Direction Generale de lAviation Civile DGAC ADs, which are proposed for incorporation by reference IBR. This action also revises the SNPRM by updating the type certificate holders name and estimated cost information. 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 March 11, 2004 69 FR
11556, is reopened.
The FAA must receive comments on this SNPRM by June 21, 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, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9 a.m. and 5
p.m., Monday through Friday, except Federal holidays.
For DGAC material that is proposed for IBR in this AD, contact the European Union Aviation Safety Agency 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 the DGAC material on the EASA
website at https ad.easa.europa.eu.
For American Eurocopter material, contact Airbus Helicopters, 2701 N
Forum Drive, Grand Prairie, TX 75052;
telephone 9726410000 or 800232
0323; fax 9726413775; or at https
www.airbus.com/helicopters/services/
technical-support.html. You may view the DGAC and American Eurocopter 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. The DGAC
material is also available in the AD
docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0175AD.
Examining the AD Docket You may examine the AD docket on the internet at https

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