80 FR 74722 - Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 80, Issue 229 (November 30, 2015)

The FAA is withdrawing a notice of proposed rulemaking (NPRM). The NPRM proposed a new airworthiness directive (AD) that had applied to all Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 650-15 and Tay 651-54 turbofan engines. The proposed action would have required reducing the cyclic life limits for certain high-pressure turbine (HPT) disks. Accordingly, we withdraw the proposed rule.

[Federal Register Volume 80, Number 229 (Monday, November 30, 2015)]
[Proposed Rules]
[Pages 74722-74723]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2015-30010]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-1014; Directorate Identifier 2015-NE-14-AD]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG 
Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Proposed rule; withdrawal.

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SUMMARY: The FAA is withdrawing a notice of proposed rulemaking (NPRM). 
The NPRM proposed a new airworthiness directive (AD) that had applied 
to all Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 650-15 and Tay 
651-54 turbofan engines. The proposed action would have required 
reducing the cyclic life limits for certain high-pressure turbine (HPT) 
disks. Accordingly, we withdraw the proposed rule.

DATES: The proposed rule published in the Federal Register on June 8, 
2015 (80 FR 32315, June 8, 2015) is withdrawn as of November 30, 2015.

FOR FURTHER INFORMATION CONTACT: Philip Haberlen, Aerospace Engineer, 
Engine Certification Office, FAA, Engine & Propeller Directorate, 12 
New England Executive Park, Burlington, MA 01803; phone: 781-238-7770; 
fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39 
with

[[Page 74723]]

a proposed AD (80 FR 32315, June 8, 2015). The proposed AD had applied 
to Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 650-15 and Tay 651-54 
turbofan engines. The NPRM proposed to reduce the cyclic life limits 
for certain HPT disks. The proposed action was prompted by an analysis 
that showed the need to reduce the cyclic life limits for certain HPT 
disks. The proposed actions intended to prevent failure of the HPT 
disk, which could result in uncontained disk release, damage to the 
engine, and damage to the airplane.
    Since we issued the NPRM (80 FR 32315, June 8, 2015), additional 
information became available after the public comment period closed on 
August 7, 2015.
    Upon further consideration, we hereby withdraw the proposed rule 
because we will propose to supersede AD 2006-18-14 (71 FR 52988, 
September 8, 2006).
    Withdrawal of the NPRM (80 FR 32315, June 8, 2015) constitutes only 
such action, and does not preclude the agency from issuing another 
notice in the future, nor does it commit the agency to any course of 
action in the future.
    Since this action only withdraws a notice of proposed rulemaking, 
it is neither a proposed nor a final rule. Therefore, Executive Order 
12866, the Regulatory Flexibility Act, or DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979) do not cover this 
withdrawal.

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. FAA-
2015-1014; Directorate Identifier 2015-NE-14-AD, published in the 
Federal Register on June 8, 2015 (80 FR 32315), is withdrawn.

    Issued in Burlington, Massachusetts, on November 20, 2015.
Colleen M. D'Alessandro,
Directorate Manager, Engine & Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2015-30010 Filed 11-27-15; 8:45 am]
 BILLING CODE 4910-13-P