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Federal Register / Vol. 86, No. 41 / Thursday, March 4, 2021 / Proposed Rules
of Martin-Baker supplier P/Ns with Sikorsky P/Ns and kit P/Ns.

of the local flight standards district office/
certificate holding district office.

Note 3 to paragraph c: The marking SIL831 incorporated or SIL833
incorporated, as applicable, could be located adjacent to identification labels on the underside of the sitting platform assembly P/N MBCS4111.

i Related Information 1 For more information about this AD, contact Dorie Resnik, Aerospace Engineer, Aviation Safety Section, Boston ACO Branch, FAA, 1200 District Ave., Burlington, MA
01803; phone: 781 2387693; email:
dorie.resnik@faa.gov.
2 For service information identified in this AD, contact your local Sikorsky Field Representative or Sikorskys Service Engineering Group at Sikorsky Aircraft Corporation, Mailstop K100, 124 Quarry Road, Trumbull, CT 06611; telephone 1800
9464337 1800WingedS; email wcs_
cust_service_eng.gr-sik@lmco.com. Operators may also log on to the Sikorsky 360 website at https www.sikorsky360.com. You may view this referenced service information 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 817 2225110.

d Subject Joint Aircraft System Component JASC
Code: 2500, Cabin Equipment/Furnishings;
and 2520, Passenger Compartment Equipment.
e Unsafe Condition This AD was prompted by an incident of a side facing utility seat detaching from wall attachment points during dynamic testing.
The FAA is issuing this AD to detect and address a main back tube, a component of the main back tube assembly, which does not meet design requirements. The unsafe condition, if not addressed, could result in increased surface friction in the direction of the seat attenuation, failure of proper utility seat attenuation during a crash event, excessive lumbar loads in an observer seat during a crash event, and subsequent excessive or fatal occupant injury.
f Compliance Comply with this AD within the compliance times specified, unless already done.

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g Required Actions 1 Within 125 hours time-in-service or six months after the effective date of this AD, whichever occurs first, replace each main back tube assembly by following Section 3., Accomplishment Instructions, paragraphs C.
through E., of ASB 9225026; except where the service information referenced in ASB
9225026 specifies destroying and disposing of parts or discarding parts, this AD requires removing those parts from service instead.
Note 4 to paragraph g1: SIL 831 and SIL
833, referred to in ASB 9225026, refer to main back tube assembly as tube assembly, back main.
2 As of the effective date of this AD, do not install a Martin-Baker side facing utility seat identified in paragraph c1 of this AD
or a Martin-Baker observer seat identified in paragraph c2 of this AD unless the actions in paragraph g1 have been accomplished.
h Alternative Methods of Compliance AMOCs 1 The Manager, Boston ACO 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 paragraph i1 of this AD.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager
VerDate Sep<11>2014

18:38 Mar 03, 2021

Jkt 253001

Issued on February 19, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202103950 Filed 3321; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 73
Docket No. FAA20201053; Airspace Docket No. 20ANM32
RIN 2120AA66

Proposed Amendment of Restricted Area R7001C and Establishment of Restricted Areas R7001D, R7002A, R7002B, and R7002C; Guernsey, WY
Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

This action proposes to amend restricted area R7001C and establish three restricted areas, R
7001D, R7002A, R7002B, and R
7002C at Guernsey, WY. The Wyoming Army National Guard WYARNG
requested the establishment of the new restricted areas to support its air-toground firing from helicopters and longer range artillery training. This additional airspace allows for the segregation of hazardous activities from non-participating air traffic. The FAA is also proposing to amend R7001C to correct an inadvertent error to ensure proper vertical separation.
DATES: Comments must be received on or before April 19, 2021.
SUMMARY:

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Send comments on this proposal to the U.S. Department of Transportation, Docket Operations, 1200
New Jersey Avenue SE, West Building Ground Floor, Room W12140, Washington, DC 205900001; telephone:
1 800 6475527, or 202 3669826.
You must identify FAA Docket Number FAA20200153; Airspace Docket No.
20ANM32 at the beginning of your comments. You may also submit comments through the internet at https www.regulations.gov.
FOR FURTHER INFORMATION CONTACT:
Christopher McMullin, Rules and Regulations Group, Office of Policy, Federal Aviation Administration, 800
Independence Avenue SW, Washington, DC 20591; telephone: 202 2678783.
SUPPLEMENTARY INFORMATION:
ADDRESSES:

Authority for This Rulemaking The FAAs authority to issue rules regarding aviation safety is found in Title 49 of the United States Code U.S.C.. Subtitle I, Section 106
describes the authority of the FAA
Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the agencys authority. This rulemaking is promulgated under the authority described in Subtitle VII, Part A, Subpart I, Section 40103. Under that section, the FAA is charged with prescribing regulations to assign the use of the airspace necessary to ensure the safety of aircraft and the efficient use of airspace. This regulation is within the scope of that authority as it would amend and establish restricted area airspace at Guernsey, WY, to contain activities deemed hazardous to nonparticipating aircraft.
Comments Invited Interested parties are invited to participate in this proposed rulemaking by submitting such written data, views, or arguments as they may desire.
Comments that provide the factual basis supporting the views and suggestions presented are particularly helpful in developing reasoned regulatory decisions on the proposal. Comments are specifically invited on the overall regulatory, aeronautical, economic, environmental, and energy-related aspects of the proposal.
Communications should identify both docket numbers FAA Docket Number FAA20200153; Airspace Docket No.
20ANM32 and be submitted in triplicate to the Docket Management Facility see ADDRESSES section for address and phone number. You may also submit comments through the internet at https www.regulations.gov.
Commenters wishing the FAA to acknowledge receipt of their comments
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