Quiero saber acerca de...

Federal Register / Vol. 86, No. 36 / Thursday, February 25, 2021 / Proposed Rules Regulatory Policies and Procedures 44
FR 11034, February 26, 1979.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Withdrawal Accordingly, the notice of proposed rulemaking, Docket No. FAA2005
21679, Directorate Identifier 2004SW
33AD, which was published in the Federal Register on June 28, 2005 70
FR 37059, is withdrawn.

Issued on February 4, 2021.
Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202103655 Filed 22421; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20130751; Directorate Identifier 2012SW051AD
RIN 2120AA64

Airworthiness Directives;
AgustaWestland S.p.A. Type Certificate Formerly Held by Agusta S.p.A Agusta Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Proposed rule; withdrawal.
AGENCY:

The FAA is withdrawing a notice of proposed rulemaking NPRM
that proposed to supersede Airworthiness Directive AD 201118
52, which applies to certain Agusta Model AB139 and AW139 helicopters.
AD 20111852 requires establishing a revised life limit for each tail rotor blade blade, updating the existing historical records for your helicopter, repetitively inspecting each blade for a crack, and replacing certain blades. The NPRM was prompted by the manufacturer developing an improved blade using different materials and establishing life limits for those newly-designed blades.
The NPRM proposed to require expanding the applicability to include the newly-designed blades and establish their life limits, and proposed to retain the requirement to inspect each blade for a crack and, if there is a crack, replace each blade with an airworthy blade. Since issuance of the NPRM, the FAA has determined that the NPRM
does not adequately address the
SUMMARY:

VerDate Sep<11>2014

16:43 Feb 24, 2021

Jkt 253001

identified unsafe condition.
Accordingly, the NPRM is withdrawn.
DATES: The FAA is withdrawing the proposed rule published September 5, 2013 78 FR 54596, as of February 25, 2021.
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. FAA2013
0751; 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 action, the European Aviation Safety Agency now European Union Aviation Safety Agency EASA AD, any comments received, and other information. The street address for Docket Operations is U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Matt Fuller, AD Program Manager, Operational Safety Branch, Airworthiness Products Section, General Aviation & Rotorcraft Unit, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 817222
5110; email matthew.fuller@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion The FAA issued an NPRM to amend 14 CFR part 39 to supersede AD 2011
1852, Amendment 3917020 77 FR
23109, April 18, 2012 AD 201118
52. AD 20111852 applies to Agusta Model AB139 and AW139 helicopters with a blade part number P/N
3G6410A00131 or P/N 4G6410A00131
installed. AD 20111852 requires establishing a revised life limit for each blade, updating the existing historical records for your helicopter, repetitively inspecting each blade for a crack, and replacing certain blades. The NPRM
published in the Federal Register on September 5, 2013 78 FR 54596. The NPRM was prompted by the manufacturer first developing two new blades with an improved design and specified life limits and repetitive inspections for the blades. Also, EASA
issued AD No. 20120030, dated February 17, 2012, which superseded EASA EAD No. 20110156E, dated August 25, 2011, to add the new blades to the required actions. The manufacturer then developed two new blades with improved materials and specified new life limits and inspections for the blades. EASA then issued EASA

PO 00000

Frm 00005

Fmt 4702

Sfmt 4702

11477

AD No. 20120076, dated May 2, 2012, revised by EASA AD No. 20120076R1, dated July 13, 2012 EASA AD No.
20120076R1, to require the repetitive inspections and reduced life limits on the additional new blades.
Actions Since the NPRM Was Issued After issuance of the NPRM, EASA
issued EASA AD No. 20120076R2, dated February 20, 2014, which revises EASA AD No. 20120076R1, to remove the repetitive 25 flight-hour inspections for blades P/N 3G6410A00132, P/N
4G6410A00132, P/N 3G6410A00133, and P/N 4G6410A00133 and extend the life limits for T/R blades P/N
3G6410A00133 and P/N
4G6410A00133. Additionally, EASA
advised that the life limits for T/R
blades P/N 3G6410A00132 and P/N
4G6410A00132 have been incorporated in the Chapter 4 airworthiness limitations section of the maintenance manual. Further, since the FAA issued the NPRM, a significant amount of time has elapsed, which would require the FAA to reopen the comment period to allow the public an opportunity to comment on the proposed actions.
Accordingly, the FAA has determined the NPRM does not adequately address the identified unsafe condition and has determined to withdraw the published NPRM and proceed with a separate rulemaking to address this unsafe condition.
Withdrawal of the NPRM constitutes only such action and does not preclude the FAA from further rulemaking on this issue, nor does it commit the FAA
to any course of action in the future.
Comments The FAA gave the public the opportunity to comment on the NPRM.
The FAA received comments from one commenter.
One commenter requested the FAA
adjust the life limit for certain partnumbered blades to be more consistent with aviation standard practices and gave the examples of 3 years since initial installation and 5 years since manufacture. Since the FAA is withdrawing the NPRM, the commenters request to adjust the compliance time is no longer necessary.
FAAs Conclusions Upon further consideration, the FAA
has determined that the NPRM does not adequately address the identified unsafe condition and the unsafe condition will be addressed in a separate AD.
Accordingly, the NPRM is withdrawn.

E:FRFM25FEP1.SGM

25FEP1