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Federal Register / Vol. 86, No. 194 / Tuesday, October 12, 2021 / Proposed Rules
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d Subject Joint Aircraft System Component JASC
Code 7230, Turbine Engine Compressor Section.
e Unsafe Condition This AD was prompted by an in-flight shutdown of an engine during a revenue flight and subsequent investigation by the manufacturer that revealed a crack in the 3rdstage compressor wheel. The FAA is issuing this AD to prevent failure of the 3rd-stage compressor wheel. The unsafe condition, if not addressed, could result in an uncontained release of the 3rd-stage compressor wheel, damage to the engine, and damage to the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Before the affected 3rd-stage compressor wheel exceeds 5,200 flight cycles since new, remove the affected 3rd-stage compressor wheel and replace with a part eligible for installation.
h Definition For the purpose of this AD, a part eligible for installation is a 3rd-stage compressor wheel that does not have a P/N and a serial number listed in the Applicability, paragraph c of this AD.
i Special Flight Permit A special flight permit may be issued in accordance with 14 CFR 21.197 and 21.199
to permit a one-time, non-revenue ferry flight to a location where the engine can be removed from service. This ferry flight must be performed with only essential flight crew.
j Alternative Methods of Compliance AMOCs 1 The Manager, Chicago ACO, 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
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to the manager of the certification office, send it to the attention of the person identified in paragraph k of this AD.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/
certificate holding district office.
k Related Information For more information about this AD, contact Kyri Zaroyiannis, Aviation Safety Engineer, Chicago ACO, FAA, 2300 E Devon Avenue, Des Plaines, IL 60018; phone: 847
2947836; fax: 847 2947834; email:
kyri.zaroyiannis@faa.gov.
Issued on October 5, 2021.
Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202122091 Filed 10821; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 71
Docket No. FAA20210815; Airspace Docket No. 21ASW17
RIN 2120AA66

Proposed Amendment Class E
Airspace; Hereford, TX
Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

This action proposes to amend the Class E airspace at Hereford, TX. The FAA is proposing this action as the result of an airspace review due to the decommissioning of the Hereford non-directional beacon NDB. The geographic coordinates of Hereford Municipal Airport, Hereford, TX, would
SUMMARY:

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also be updated to coincide with the FAAs aeronautical database.
DATES: Comments must be received on or before November 26, 2021.
ADDRESSES: Send comments on this proposal to the U.S. Department of Transportation, Docket Operations, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590; telephone 202
3669826, or 800 6475527. You must identify FAA Docket No. FAA2021
0815/Airspace Docket No. 21ASW17, at the beginning of your comments. You may also submit comments through the internet at https www.regulations.gov.
You may review the public docket containing the proposal, any comments received, and any final disposition in person in the Dockets Office between 9:00 a.m. and 5:00 p.m., Monday through Friday, except federal holidays.
FAA Order JO 7400.11F, Airspace Designations and Reporting Points, and subsequent amendments can be viewed online at https www.faa.gov/air_
traffic/publications/. For further information, you can contact the Airspace Policy Group, Federal Aviation Administration, 800 Independence Avenue SW, Washington, DC 20591;
telephone: 202 2678783. The Order is also available for inspection at the National Archives and Records Administration NARA. For information on the availability of FAA
JO 7400.11F at NARA, email:
fr.inspection@nara.gov or go to https
www.archives.gov/federal-register/cfr/
ibr-locations.html.
FOR FURTHER INFORMATION CONTACT:
Jeffrey Claypool, Federal Aviation Administration, Operations Support Group, Central Service Center, 10101
Hillwood Parkway, Fort Worth, TX
76177; telephone 817 2225711.
SUPPLEMENTARY INFORMATION:

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Figure 1 to Paragraph cSerial Numbers of Affected PIN 23084158 3rdstage Compressor Wheels