Voglio sapere a riguardo di…

Federal Register / Vol. 86, No. 136 / Tuesday, July 20, 2021 / Rules and Regulations limit of certain part-numbered T/R
blades, retaining the repetitive inspections of certain part-numbered T/R blades and depending on the inspection results, performing certain applicable corrections.
Also, after AD 20111852 was issued, the FAA issued an NPRM 78 FR
54596, which published in the Federal Register on September 5, 2013. The NPRM proposed to require retaining the inspection requirements for certain partnumbered blades and expand the applicability to include the newly designed blades and establish life limits for those blades. The NPRM also proposed to require replacing any cracked blade or any blade that has reached its life limit. That NPRM was prompted by improved modifications of the T/R blades. However, because the FAA determined that the NPRM did not adequately address the identified unsafe condition, the NPRM was withdrawn on February 25, 2021 86 FR 11477.
Additional review also revealed necessary changes to address the unsafe condition. Therefore, in the NPRM
published in the Federal Register on May 10, 2021 86 FR 24780, the FAA
proposed to clarify the repetitive inspection for T/R blade P/Ns 3G6410A00131 and P/N 4G6410A00131
from, visually inspect the T/R blade for a crack or damage to visually inspect the T/R blade for a crack and damage.
The NPRM further proposed to revise that repetitive inspection from damage that exceeds the limits of the applicable maintenance manual to damage that exceeds allowable limits to meet current publishing requirements. The NPRM also clarified the inspection area for that repetitive inspection by proposing to require using a figure in the related service information instead of using a figure in the body of the AD
action. The NPRM also proposed to revise the requirements of AD 201118
52 by removing unnecessary information, including the special flight permits paragraph.
Discussion of Final Airworthiness Directive Comments
khammond on DSKJM1Z7X2PROD with RULES

The FAA received no comments on the NPRM or on the determination of the costs.
Conclusion 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 about the unsafe condition described in its AD. The FAA reviewed
VerDate Sep<11>2014

17:22 Jul 19, 2021

Jkt 253001

the relevant data and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these helicopters.
Related Service Information Under 1
CFR Part 51
The FAA reviewed AgustaWestland Mandatory Bollettino Tecnico No. 139
265, Revision B, dated February 18, 2014. This service information specifies a precautionary inspection for a crack, a life limit for the affected T/R blades, and a quarantine of T/R blades that have exceeded their life limit. This service information also provides instructions for mixed usage of the affected T/R
blades and sending certain data to the manufacturer.
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.
Differences Between This AD and the EASA AD
The EASA AD does not list the T/R
blade life limits and instead references the Airworthiness Limitations Section of AW139 AMPI Chapter 4, while this AD includes the life limits in the AD.
The EASA AD requires reporting information to Product Support Engineering, whereas this AD does not.
The EASA AD requires contacting AgustaWestland if a crack or damage is found during the inspection, whereas this AD requires removing the T/R blade from service.
Costs of Compliance The FAA estimates that this AD
affects 130 helicopters of U.S. Registry and that operators may incur the following costs in order to comply with this AD. Labor costs are estimated at $85
per work-hour.
Inspecting one T/R blade for a crack will take about 1 work-hour for an estimated cost of $85 per T/R blade per inspection cycle and up to $44,200 for the U.S. fleet per inspection cycle.
Replacing one T/R blade will take about 8 work-hours and parts will cost about $40,560 for an estimated cost of $41,240 per replacement.
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.

PO 00000

Frm 00011

Fmt 4700

Sfmt 4700

38219

The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA
with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce.
This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.
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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
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:
a. Removing Airworthiness Directive AD 20111852, Amendment 39
17020 77 FR 23109, April 18, 2012;
and b. Adding the following new AD:

20211418 Leonardo S.p.a. Type Certificate Previously Held by Agusta S.p.A.: Amendment 3921645; Docket No.
FAA20210348; Project Identifier 2018
SW076AD.

E:FRFM20JYR1.SGM

20JYR1