This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

6749 

Vol. 78, No. 21 

Thursday, January 31, 2013 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–1327; Directorate 

Identifier 2012–NE–47–AD] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

plc Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for all 

Rolls-Royce plc (RR) models RB211 

Trent 768–60, 772–60, and 772B–60 

turbofan engines. This proposed AD was 

prompted by low-pressure (LP) 

compressor blade partial airfoil release 

events. This proposed AD would require 

a one-time ultrasonic C-scan inspection 

of LP compressor blades that had 

accumulated more than 2,500 flight 

cycles since new. We are proposing this 

AD to prevent LP compressor blade 

airfoil separations, engine damage, and 

damage to the airplane. 

DATES: We must receive comments on 

this proposed AD by April 1, 2013. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov and follow 

the instructions for sending your 

comments electronically. 

• Mail: Docket Management Facility, 

U.S. Department of Transportation, 1200 

New Jersey Avenue SE., West Building 

Ground Floor, Room W12–140, 

Washington, DC 20590–0001. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

• Fax: 202–493–2251. 

For service information identified in 

this proposed AD, contact Rolls-Royce 

plc, P.O. Box 31, Derby DE24 8BJ, UK; 

phone: 44 (0) 1332 242424; fax: 44 (0) 

1332 249936. You may view this service 

information at the FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA. For 

information on the availability of this 

material at the FAA, call 781–238–7125. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (phone: 800–647–5527) is the 

same as the Mail address provided in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Robert Green, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7754; fax: 781–238– 

7199; email: Robert.Green@faa.gov. 

SUPPLEMENTARY INFORMATION:

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2012–1327; Directorate Identifier 

2012–NE–47–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD based on those comments. 

We will post all comments we 

receive, without change, to http:// 

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact with FAA 

personnel concerning this proposed AD. 

Using the search function of the Web 

site, anyone can find and read the 

comments in any of our dockets, 

including, if provided, the name of the 

individual who sent the comment (or 

signed the comment on behalf of an 

association, business, labor union, etc.). 

You may review the DOT’s complete 

Privacy Act Statement in the Federal 

Register published on April 11, 2000 

(65 FR 19477–78). 

Discussion 

The European Aviation Safety Agency 

(EASA), which is the aviation authority 

for the Member States of the European 

Community, has issued EASA AD 2012– 

0247, dated November 20, 2012, a 

mandatory continuing airworthiness 

information (referred to hereinafter as 

‘‘MCAI’’), to correct an unsafe condition 

for the specified products. The MCAI 

states: 

Low Pressure (LP) compressor partial 

aerofoil blade release events have occurred in 

service on RR Trent 700 engines. While 

primary containment of the released sections 

has been achieved in each case, some of the 

releases did exhibit secondary effects that are 

considered to present a potential hazard. 

Previously, expeditious actions by RR have 

mitigated the risks presented by these effects, 

by removal from service of batches of LP 

compressor blades. However, some causal 

factors still exist that are not fully 

understood. 

This condition, if not detected and 

corrected, could lead to LP compressor blade 

release with possible consequent loss of the 

engine nose cowl, under cowl fires and 

forward projection of secondary debris, 

possibly resulting in damage to the aeroplane 

and/or injury to persons on the ground. 

You may obtain further information 

by examining the MCAI in the AD 

docket. 

Relevant Service Information 

RR has issued Non-Modification 

Service Bulletin (NMSB) RB.211–72– 

G702, dated May 23, 2011. The actions 

described in this service information 

were issued to understand the condition 

of a sample of operator blades in 

advance of the introduction of regularly 

scheduled ultrasonic C-scan shop visit 

inspections. RR subsequently issued 

NMSB RB.211–72–G872, Revision 1, 

dated July 2, 2012. The actions 

described in this service information are 

intended to prevent LP compressor 

blade airfoil release events by 

conducting in-service ultrasonic C-scan 

inspections. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

EASA, and is approved for operation in 

the United States. Pursuant to our 

bilateral agreement with the European 

Community, EASA has notified us of 


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6750 Federal Register / Vol. 78, No. 21 / Thursday, January 31, 2013 / Proposed Rules 

the unsafe condition described in the 

MCAI and service information 

referenced above. We are proposing this 

AD because we evaluated all 

information provided by EASA and 

determined the unsafe condition exists 

and is likely to exist or develop on other 

products of the same type design. This 

proposed AD would require a one-time 

ultrasonic C-scan inspection of LP 

compressor blades that had 

accumulated more than 2,500 flight 

cycles since new. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 56 engines installed on 

airplanes of U.S. registry. We also 

estimate that it would take about 38 

hours per engine to comply with this 

proposed AD. The average labor rate is 

$85 per hour. Required parts cost is $0 

per engine. Based on these figures, we 

estimate the cost of the proposed AD on 

U.S. operators to be $180,880. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s 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 Agency’s 

authority. 

We are 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 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would 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 this proposed regulation: 

1. Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866; 

2. Is not a ‘‘significant rule’’ under the 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); 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. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this proposed AD and placed it in the 

AD docket. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new AD: 

Rolls-Royce plc: Docket No. FAA–2012– 

1327; Directorate Identifier 2012–NE– 

47–AD. 

(a) Comments Due Date 

We must receive comments by April 1, 

2013. 

(b) Affected Airworthiness Directives (ADs) 

None. 

(c) Applicability 

This AD applies to all Rolls-Royce plc (RR) 

models RB211 Trent 768–60, 772–60, and 

772B–60 turbofan engines. 

(d) Reason 

This AD was prompted by low-pressure 

(LP) compressor blade partial airfoil release 

events. We are issuing this AD to prevent LP 

compressor blade airfoil separations, engine 

damage, and damage to the airplane. 

(e) Actions and Compliance 

Unless already done, do the following 

actions. 

(1) For LP compressor blades that, on the 

effective date of this AD, have accumulated 

or exceeded 2,500 flight cycles (FCs) since 

new, or since inspection in accordance with 

RR Non-Modification Service Bulletin 

(NMSB) RB.211–72–G702, dated May 23, 

2011, or since in-shop ultrasonic inspection 

in accordance with the Engine Manual, 

replace each LP compressor blade (either onwing or in-shop) with a blade eligible for 

installation, within 500 FCs after the effective 

date of this AD. 

(2) From the effective date of this AD, do 

not install on an engine any LP compressor 

blades that have been removed as required by 

paragraph (e)(1) of this AD, unless the LP 

compressor blades have passed the ultrasonic 

C-scan inspection in accordance with 

paragraphs 3.C. through 3.F. of the 

Accomplishment Instructions of RR NMSB 

RB.211–72–G872, Revision 1, dated July 2, 

2012 (or original issue dated April 3, 2012), 

as applicable. 

(f) Alternative Methods of Compliance 

(AMOCs) 

The Manager, Engine Certification Office, 

FAA, may approve AMOCs for this AD. Use 

the procedures found in 14 CFR 39.19 to 

make your request. 

(g) Related Information 

(1) For more information about this AD, 

contact Robert Green, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7754; fax: 781–238–7199; 

email: Robert.Green@faa.gov. 

(2) European Aviation Safety Agency, AD 

2012–0247, dated November 20, 2012, RR 

NMSB RB.211–72–G702, dated May 23, 2011, 

and RR NMSB RB.211–72–G872, dated July 

2, 2012 pertain to the subject of this AD. 

(3) For service information identified in 

this AD, contact Rolls-Royce plc, P.O. Box 

31, Derby DE24 8BJ, UK; phone: 44 (0) 1332 

242424; fax: 44 (0) 1332 249936. 

(4) You may view this service information 

at the FAA, Engine & Propeller Directorate, 

12 New England Executive Park, Burlington, 

MA. For information on the availability of 

this material at the FAA, call 781–238–7125. 

Issued in Burlington, Massachusetts, on 

January 25, 2013. 

Colleen M. D’Alessandro, 

Assistant Manager, Engine & Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–02077 Filed 1–30–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF COMMERCE 

Bureau of Industry and Security 

15 CFR Part 774 

[Docket No. 120326218–2180–01] 

RIN 0694–AF56 

Revisions to the Export Administration 

Regulations (EAR): Articles the 

President Determines No Longer 

Warrant Control Under the U.S. 

Munitions List That Are Related To 

Launch Vehicles, Missiles, Rockets, 

and Military Explosive Devices 

AGENCY: Bureau of Industry and 

Security, Department of Commerce. 

ACTION: Proposed rule. 

SUMMARY: This proposed rule describes 

how articles the President determines 

no longer warrant control under the 

United States Munitions List (USML) 

Category IV would be controlled on the 


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