Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky) Model Helicopters

[Federal Register Volume 78, Number 134 (Friday, July 12, 2013)]
[Rules and Regulations]
[Pages 41836-41837]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-16693]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2012-1206; Directorate Identifier 2012-SW-021-AD; 
Amendment 39-17269; AD 2012-23-13]
RIN 2120-AA64


Airworthiness Directives; Sikorsky Aircraft Corporation 
(Sikorsky) Model Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; correction.

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SUMMARY: The FAA is correcting an airworthiness directive (AD) that was 
published in the Federal Register. The

[[Page 41837]]

AD applies to all Sikorsky Model S-70, S-70A, and S-70C helicopters, 
which are restricted category helicopters derived from the military 
Model UH-60 helicopter. The part number (P/N) for the No. 2 crossfeed 
breakaway valve listed in the ``Required Actions'' section is 
incorrect. This document corrects that error. Also, this document 
contains a response to a comment received after publication of the 
Final Rule. In all other respects, the original document remains the 
same.

DATES: This final rule is effective July 12, 2013. The effective date 
for AD 2012-23-13 (77 FR 71087, November 29, 2012) remains December 14, 
2012.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this AD, the regulatory evaluation, 
any comments received, and other information. The address for the 
Docket Office (phone: 800-647-5527) is Document Management Facility, 
U.S. Department of Transportation, Docket Operations, M-30, West 
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., 
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Michael Davison, Flight Test Engineer, 
New England Regional Office, FAA, 12 New England Executive Park, 
Burlington, MA 01803; phone: (781) 238-7156, email: 
[email protected].

SUPPLEMENTARY INFORMATION: Airworthiness Directive 2012-23-13, 
Amendment 39-17269 (77 FR 71087, November 29, 2012), currently includes 
the following under paragraph (e)(xiii) in the Required Actions 
section:

    (xiii) For Number 2 crossfeed breakaway valve, P/N 70307-03600-
103, establish a life limit of 1,500 hours.

    As published, the identification of the P/N as 70307-03600-103 is 
incorrect. The correct P/N is 70307-03006-103. No other part of the 
regulatory information has been changed; therefore, only the changed 
portion of the final rule is being published in the Federal Register.

Comments

    After we published our Final rule; request for comments (77 FR 
71087; November 29, 2012), we received a comment from one commenter.

Request

    The one commenter from the manufacturer stated that the document 
reduced the life limit for the main and tail rotor blades but does not 
make any reference to the detailed internal life limited components of 
the blades. The commenter asked whether the AD applies only to the 
blade assembly P/Ns and whether the blade components were overlooked.
    We do not agree that the AD should include life limits for the 
internal components of the blade assembly. The life limit of each main 
and tail rotor blade reflects the life limit of its lowest component in 
the Sikorsky Airworthiness Limitations technical manual. That manual 
does not list life limits for individual internal components.

Correction of Regulatory Text


Sec.  39.13  [Corrected]

    In the Federal Register of November 29, 2012, on page 71089, in the 
first column, paragraph (e)(xiii) of AD 2012-23-13 is corrected to read 
as follows:
* * * * *
    (e)(xiii) For Number 2 crossfeed breakaway valve, P/N 70307-03006-
103, establish a life limit of 1,500 hours TIS.
* * * * *

    Issued in Fort Worth, Texas, on July 3, 2013.
Kim Smith,
Directorate Manager, Rotorcraft Directorate, Aircraft Certification 
Service.
[FR Doc. 2013-16693 Filed 7-11-13; 8:45 am]
BILLING CODE 4910-13-P

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