Voglio sapere a riguardo di…

56217

Proposed Rules
Federal Register Vol. 86, No. 193
Friday, October 8, 2021

This section of the FEDERAL REGISTER
contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Examining the AD Docket
14 CFR Part 39
Docket No. FAA20210869; Project Identifier AD202100176E
RIN 2120AA64

Airworthiness Directives; General Electric Company Turbofan Engines Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to adopt a new airworthiness directive AD for certain General Electric Company GE
CF348C and CF348E model turbofan engines. This proposed AD was prompted by a report of a quality escape during the manufacturing of a highpressure turbine HPT rotor stage 1
disk. This proposed AD would require removing the HPT rotor stage 1 disk from service and replacing the HPT
rotor stage 1 disk with a part eligible for installation. The FAA is proposing this AD to the unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by November 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 above between 9 a.m. and 5
p.m., Monday through Friday, except Federal holidays.
For service information identified in this NPRM, contact General Electric
jspears on DSK121TN23PROD with PROPOSALS1

SUMMARY:

VerDate Sep<11>2014

16:42 Oct 07, 2021

Company, 1 Neumann Way, Cincinnati, OH 45215; phone: 513 5523272;
email: aviation.fleetsupport@ae.ge.com;
website: https www.ge.com. You may view this 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 781 238
7759.

Jkt 256001

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 Scott Stevenson, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.

You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210869; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this NPRM, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Scott Stevenson, Aviation Safety Engineer, ECO Branch, FAA, 1200
District Avenue, Burlington, MA 01803; Background phone: 781 2387132; fax: 781 238
The FAA was notified by GE of a 7199; email: Scott.M.Stevenson@faa.gov.
quality escape that occurred during the SUPPLEMENTARY INFORMATION:
manufacturing of an HPT rotor stage 1
Comments Invited disk. The quality escape occurred at a supplier that began production in The FAA invites you to send any August 2019. On November 25, 2019, written relevant data, views, or the supplier discovered tool gouges at arguments about this proposal. Send the forward chamfer of the air holes in your comments to an address listed an HPT rotor stage 1 disk. These gouges under ADDRESSES. Include Docket No.
FAA20210869; Project Identifier AD can reduce the life of the HPT rotor 202100176E at the beginning of your stage 1 disk. This condition, if not addressed, could result in uncontained comments. The most helpful comments disk release, damage to the engine, and reference a specific portion of the proposal, explain the reason for any damage to the airplane.
recommended change, and include supporting data. The FAA will consider FAAs Determination all comments received by the closing The FAA is issuing this NPRM after date and may amend this proposal determining that the unsafe condition because of those comments.
described previously is likely to exist or Except for Confidential Business develop on other products of the same Information CBI as described in the type design.
following paragraph, and other Related Service Information information as described in 14 CFR
11.35, the FAA will post all comments The FAA reviewed GE CF348C Alert received, without change, to https
Service Bulletin ASB 72A0344 R01
www.regulations.gov, including any and GE CF348E ASB 72A0228 R01, personal information you provide. The both dated December 19, 2019. The agency will also post a report ASBs describe procedures for removing summarizing each substantive verbal the HPT rotor stage 1 disk. The FAA
contact received about this NPRM.
also reviewed GE Repair Document RD
Confidential Business Information 1501811P1, dated March 17, 2020.
This document describes procedures for CBI is commercial or financial information that is both customarily and repairing the HPT rotor stage 1 disk.

PO 00000

Frm 00001

Fmt 4702

Sfmt 4702

E:FRFM08OCP1.SGM

08OCP1