Voglio sapere a riguardo di…

Federal Register / Vol. 86, No. 36 / Thursday, February 25, 2021 / Rules and Regulations 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. It is also available on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2020
0649.

ADDRESSES:

Examining the AD Docket You may examine the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2020
0649; 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 AD, the European Union Aviation Safety Agency EASA AD, any service information that is incorporated by reference, any comments received, and other information. The street address for Docket Operations is U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Kristi Bradley, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX
76177; telephone 8172225110; email kristin.bradley@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to Leonardo Model AB139 and AW139 helicopters with certain serialnumbered engine mounting rods part number P/N 3G7120V00132. The NPRM published in the Federal Register on July 9, 2020 85 FR 41219.
The NPRM proposed to require removing the affected engine mounting rods from service and proposed to prohibit installing an affected engine mounting rod on any helicopter. The proposed requirements were intended to prevent failure of an affected engine mounting rod, which could possibly result in loss of control of the helicopter.
The NPRM was prompted by EASA
AD No. 20190149, dated June 24, 2019,
VerDate Sep<11>2014

16:18 Feb 24, 2021

Jkt 253001

issued by EASA, which is the Technical Agent for the Member States of the European Union, to correct an unsafe condition for Leonardo S.p.a. formerly Finmeccanica S.p.A., AgustaWestland S.p.A., Agusta S.p.A.; and AgustaWestland Philadelphia Corporation, formerly Agusta Aerospace Corporation Model AB139 and AW139
helicopters with certain serial numbered engine mounting rods P/N
3G7120V00132 installed. EASA advises of reports of a production nonconformity on a specific batch of these engine mounting rods. EASA further advises that this non-conformity degrades the material strength of the engine mounting rods.
EASA states this condition, if not corrected, could lead to failure of an affected engine mounting rod, possibly resulting in loss of control of the helicopter. Accordingly, the EASA AD
requires removing from service each affected engine mounting rod, emailing a completed Scrap Report to Leonardo Helicopters Division, and installing a serviceable engine mounting rod. The EASA AD also prohibits installing an affected engine mounting rod on any helicopter.
Comments The FAA gave the public the opportunity to participate in developing this final rule, but the FAA did not receive any comments on the NPRM or on the determination of the cost to the public.
FAAs Determination These helicopters have been approved by EASA and are approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the European Union, EASA has notified the FAA of the unsafe condition described in its AD. The FAA is issuing this AD
after evaluating all of the information provided by EASA and determining the unsafe condition exists and is likely to exist or develop on other helicopters of the same type designs and that air safety and the public interest require adopting the AD requirements as proposed.
Differences Between This AD and the EASA AD
The EASA AD requires emailing a completed Scrap Report to Leonardo Helicopters Division at the same compliance time as the engine mounting rod removal, whereas this AD does not.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Leonardo Helicopters Alert Service Bulletin ASB
No. 139593, Revision A, dated June 14,
PO 00000

Frm 00025

Fmt 4700

Sfmt 4700

11411

2019 ASB 139593, Revision A, which specifies procedures to replace the engine outboard and inboard mounting rods from the Number 1 and Number 2
engines.
This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section.
Other Related Service Information The FAA reviewed Leonardo Helicopters ASB No. 139593, dated June 11, 2019. This service information contains the same procedures as ASB
139593, Revision A. However, ASB
139593, Revision A expands the applicability from certain serialnumbered Model AB139 and AW139
helicopters to all Model AB139 and AW139 helicopters with affected engine mounting rods installed.
The FAA also reviewed Leonardo Helicopters AMP DM 39A712105
00A520AB, AMP DM 39A7121
0500A720AB, AMP DM 39A71
210600A520AB, AMP DM 39A
71210600A720AB, AMP DM 39
A71210700A520AB, AMP DM
39A71210700A720AB, AMP
DM 39A71210800A520AB, and AMP DM 39A71210800A720A
B, all dated October 4, 2019. This service information specifies instructions for removing and installing the outboard and inboard engine mounting rods.
Costs of Compliance The FAA estimates that this AD
affects up to 126 helicopters of U.S.
Registry. The FAA estimates that operators may incur the following costs in order to comply with this AD. Labor costs are estimated at $85 per workhour.
Replacing an engine mounting rod requires about 8 work-hours and parts cost about $1,000 for an estimated cost of $1,680 per engine mounting rod.
According to Leonardo Helicopters service information, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. The FAA does not control warranty coverage by Leonardo Helicopters. Accordingly, all costs are included in this cost estimate.
Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. 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.

E:FRFM25FER1.SGM

25FER1