Voglio sapere a riguardo di…

38914

Federal Register / Vol. 86, No. 139 / Friday, July 23, 2021 / Rules and Regulations
Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I
certify that this AD:
1 Is not a significant regulatory action under Executive Order 12866, 2 Will not affect intrastate aviation in Alaska, and 3 Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

d Subject Joint Aircraft System Component JASC
Code 7250, Turbine Section.
e Unsafe Condition This AD was prompted by an inspection by the manufacturer that revealed cracking of the high-pressure turbine HPT rotor stage 1
disk, caused by initial flange-to-flange cracking on the HPT thermal shield between the HPT rotor stage 1 disk and the HPT rotor stage 2 disk. The FAA is issuing this AD to prevent failure of the HPT rotor stage 1 disk and the HPT rotor stage 2 disk. The unsafe condition, if not addressed, could result in uncontained release of the HPT rotor stage 1
and stage 2 disks, damage to the engine, and damage to the airplane.

k Related Information For more information about this AD, contact Kevin M. Clark, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781
2387088; fax: 781 2387199; email:
Kevin.M.Clark@faa.gov.
l Material Incorporated by Reference None.
Issued on June 25, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202115694 Filed 72221; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39

List of Subjects in 14 CFR Part 39

f Compliance
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

Comply with this AD within the compliance times specified, unless already done.

Docket No. FAA20210375; Project Identifier MCAI202001245R; Amendment 3921656 AD 20211509

The Amendment
g Required Actions
RIN 2120AA64

Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

1 After the effective date of this AD, at every piece-part exposure of the HPT rotor stage 1 disk, HPT rotor stage 2 disk, or the HPT thermal shield, perform a visual inspection and a fluorescent penetrant inspection of the HPT thermal shield.
2 During any inspection required by paragraph g1 of this AD, if a crack extending through either the forward or aft flange of the HPT thermal shield is detected, remove the HPT thermal shield, the HPT
rotor stage 1 disk, and the HPT rotor stage 2
disk from service.

Airworthiness Directives; Leonardo S.p.a. Helicopters
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20211411 General Electric Company:
Amendment 3921638; Docket No.
FAA20201179; Project Identifier AD
202000818E.
a Effective Date This airworthiness directive AD is effective August 27, 2021.
b Affected ADs None.

khammond on DSKJM1Z7X2PROD with RULES

9315M41P09, 9315M41P13, 9315M41P14, 9315M41P15, 9315M41P16, 9315M41P20, 9348M13P01, 9367M63P01, 9367M63P02, 9367M63P03, 9367M63P04, 9367M63P05, 9367M63P06, 9367M63P07, or 9315M41P20.

c Applicability This AD applies to General Electric Company GE CF680A, CF680A1, CF6
80A2, CF680A3, CF680C2A1, CF6
80C2A2, CF680C2A3, CF680C2A5, CF6
80C2A5F, CF680C2A8, CF680C2B1, CF6
80C2B1F, CF680C2B1F1, CF680C2B1F2, CF680C2B2, CF680C2B2F, CF680C2B3F, CF680C2B4, CF680C2B4F, CF680C2B5F, CF680C2B6, CF680C2B6F, CF6
80C2B6FA, CF680C2B7F, CF680C2B8F, CF680C2D1F, CF680C2K1F, and CF6
80C2L1F model turbofan engines with an installed thermal shield having one of the following part numbers: 2787M85P01,
VerDate Sep<11>2014

15:54 Jul 22, 2021

Jkt 253001

h Installation Prohibition Do not install onto any engine an HPT
rotor stage 1 disk or HPT rotor stage 2 disk that was removed from service due to the requirements of paragraph g2 of this AD.
i Definition For the purpose of this AD, piece-part exposure is when the HPT rotor stage 1
disk, HPT rotor stage 2 disk, or HPT thermal shield is separated from their mating rotor parts within the HPT rotor module.
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 ECO Branch, 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 of the local flight standards district office/
certificate holding district office.

PO 00000

Frm 00010

Fmt 4700

Sfmt 4700

Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was prompted by two events of uncommanded emergency flotation system EFS deployment during flight.
This AD requires replacing certain partnumbered EFS control panels and prohibits installing them. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective August 27, 2021.
ADDRESSES: For service information identified in this final rule, contact Leonardo S.p.A. Helicopters, Emanuele Bufano, Head of Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate Va Italy; telephone +39
0331225074; fax +390331229046; or at https www.leonardocompany.com/
en/home. You may view the 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 817 222
5110.
SUMMARY:

Examining the AD Docket You may examine the AD docket at https www.regulations.gov by
E:FRFM23JYR1.SGM

23JYR1