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[Federal Register Volume 77, Number 68 (Monday, April 9, 2012)]
[Rules and Regulations]
[Page 20987]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-8289]

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Rules and Regulations
                                                Federal Register
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This section of the FEDERAL REGISTER contains regulatory documents 
having general applicability and legal effect, most of which are keyed 
to and codified in the Code of Federal Regulations, which is published 
under 50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by the Superintendent of Documents. 
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Federal Register / Vol. 77, No. 68 / Monday, April 9, 2012 / Rules 
and Regulations

[[Page 20987]]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-0959; Directorate Identifier 2011-NE-25-AD; 
Amendment 39-16970; AD 2012-04-14]
RIN 2120-AA64

Airworthiness Directives; Rolls-Royce plc Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; correction.

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SUMMARY: The FAA is correcting an airworthiness directive (AD) that 
published in the Federal Register. That AD applies to RB211-Trent 800 
series turbofan engines. The last comment response in the preamble and 
the first sentence of regulatory text paragraph (g)(1) are incorrect. 
The repetitive inspection interval should be 2,000 flight cycles, not 
1,000 flight cycles. This document corrects those errors. In all other 
respects, the original document remains the same.

DATES: This final rule is effective April 11, 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: Alan Strom, Aerospace Engineer, Engine 
Certification Office, FAA, Engine & Propeller Directorate, 12 New 
England Executive Park, Burlington, MA 01803; email: 
alan.strom@faa.gov; phone: 781-238-7143; fax: 781-238-7199.

SUPPLEMENTARY INFORMATION: AD 2012-04-14, Amendment 39-16970 (77 FR 
13485, March 7, 2012), currently requires inspecting the front 
combustion liner head section for cracking, and if found cracked, 
removing the front combustion liner head section from service at the 
next shop visit.
    As published, the last comment response in the preamble, and the 
first sentence of regulatory text paragraph (g)(1), are incorrect. No 
other part of the preamble or regulatory text has been changed; 
therefore, only the changed portions of the final rule is being 
published in the Federal Register.
    The effective date of this AD remains April 11, 2012.

Correction of Non-Regulatory Text

    In the Federal Register of March 7, 2012, AD 2012-04-14; Amendment 
39-16970, is corrected to read as follows:
    On page 13486, in the 3rd column, under the heading Need to Show 
All Acceptable Means of Completing the On-Wing Inspection, the 2nd 
sentence in the 1st paragraph is corrected to read ``We changed the 2nd 
sentence of paragraphs (f)(1) and (g)(1) of the proposed AD from:''
    On page 13486, in the 3rd column, under the heading Need to Show 
All Acceptable Means of Completing the On-Wing Inspection, the 1st 
sentence in the 2nd and 3rd paragraphs, is deleted.

Correction of Regulatory Text

Sec.  39.13  [Corrected]

0
In the Federal Register of March 7, 2012, AD 2012-04-14; Amendment 39-
16970, on page 13487, in the first column, in paragraph (g)(1), the 
first sentence is corrected to read as follows:
* * * * *
    (g)(1) At intervals not to exceed 2,000 FCs, inspect the front 
combustion liner head section for cracking.
* * * * *

    Issued in Burlington, Massachusetts, on March 30, 2012.
Colleen D'Alessandro,
Assistant Manager, Engine & Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2012-8289 Filed 4-6-12; 8:45 am]
BILLING CODE 4910-13-P
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