6206 Federal Register / Vol. 78, No. 20 / Wednesday, January 30, 2013 / Rules and Regulations 

send your request to your principal inspector 

or local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the ACO, send it to the 

attention of the person identified in the 

Related Information section of this AD. 

Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair 

required by this AD if it is approved by the 

Boeing Commercial Airplanes Organization 

Designation Authorization (ODA) that has 

been authorized by the Manager, Seattle 

ACO, to make those findings. For a repair 

method to be approved, the repair must meet 

the certification basis of the airplane, and the 

approval must specifically refer to this AD. 

(n) Related Information 

(1) For more information about this AD, 

contact Jeffrey W. Palmer, Aerospace 

Engineer, Systems and Equipment Branch, 

ANM–130S, FAA, Seattle Aircraft 

Certification Office, 1601 Lind Avenue SW., 

Renton, Washington 98057–3356; phone: 

(425) 917–6472; fax: (425) 917–6590; email: 

jeffrey.w.palmer@faa.gov. 

(2) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, Washington 98124–2207; telephone 

206–544–5000, extension 1, fax 206–766– 

5680; Internet https:// 

www.myboeingfleet.com. You may review 

copies of the referenced service information 

at the FAA, Transport Airplane Directorate, 

1601 Lind Avenue SW., Renton, Washington. 

For information on the availability of this 

material at the FAA, call 425–227–1221. 

(o) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(3) The following service information was 

approved for IBR on March 6, 2013. 

(i) Boeing Service Bulletin 737–21–1171, 

dated February 12, 2009. 

(ii) Reserved. 

(4) The following service information was 

approved for IBR on November 7, 2012 (77 

FR 60296, October 3, 2012). 

(i) Boeing Alert Service Bulletin 737– 

31A1332, Revision 1, dated June 24, 2010. 

(ii) Boeing Alert Service Bulletin 737– 

31A1332, Revision 2, dated August 18, 2011. 

(iii) Boeing Alert Service Bulletin 737– 

31A1332, Revision 3, dated March 28, 2012. 

(4) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, Washington 98124–2207; telephone 

206–544–5000, extension 1; fax 206–766– 

5680; Internet https:// 

www.myboeingfleet.com. 

(5) You may view this service information 

at the FAA, Transport Airplane Directorate, 

1601 Lind Avenue SW., Renton, Washington. 

For information on the availability of this 

material at the FAA, call 425–227–1221. 

(6) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, call 

202–741–6030, or go to: http:// 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Renton, Washington, on January 

9, 2013. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–01720 Filed 1–29–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–0030; Directorate 

Identifier 2012–NE–42–AD; Amendment 39– 

17325; AD 2013–02–04] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

plc Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for all 

Rolls-Royce plc RB211–Trent 970–84, 

RB211–Trent 970B–84, RB211–Trent 

972–84, RB211–Trent 972B–84, RB211– 

Trent 977–84, RB211–Trent 977B–84 

and RB211–Trent 980–84 turbofan 

engines. This AD requires on-wing 

inspections of low-pressure turbine 

(LPT) disk seal fins and interstage seals 

when post-flight review indicates 

Engine Health Monitoring (EHM) 

vibratory maintenance-alert limits were 

exceeded in flight. The AD also requires 

in-shop inspections of the LPT disk seal 

fins and interstage seals to detect cracks 

or damage and, depending on the 

findings, accomplishment of corrective 

action. This AD is prompted by a Trent 

900 engine experiencing LPT stage 2 

disk interstage seal material loss and 

increased low-pressure rotor vibration 

while in flight. We are issuing this AD 

to prevent cracks in the LPT disk, which 

could result in uncontained engine 

failure and damage to the airplane. 

DATES: This AD becomes effective 

February 14, 2013. 

We must receive comments on this 

AD by March 18, 2013. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of February 14, 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: 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 AD, contact Rolls-Royce plc, 

Corporate Communications, P.O. Box 

31, Derby, England, DE248BJ; phone: 

011–44–1332–242424; fax: 011–44– 

1332–245418, or email: http:// 

www.rolls-royce.com/contact/ 

civil_team.jsp. You may view this 

service information at the FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803. 

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 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: 

Discussion 

The European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Community, has issued EASA 

Airworthiness Directive 2012–0220, 

dated October 22, 2012, a Mandatory 


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Federal Register / Vol. 78, No. 20 / Wednesday, January 30, 2013 / Rules and Regulations 6207 

Continuing Airworthiness Information 

(referred to after this as ‘‘the MCAI’’), to 

correct an unsafe condition for the 

specified products. The MCAI states: 

Following a revenue service flight, a Trent 

900 engine experienced increased lowpressure vibration. The vibration did not 

exceed any engine limits, and the engine was 

not shut down during flight. Upon post-flight 

inspection of the engine, debris was found in 

the exhaust tail pipe and the engine was 

removed. The results of a subsequent strip 

inspection revealed that the stage 2 LowPressure Turbine (LPT) disc had suffered 

material loss from a portion of the Interstage 

Seal (ISS) area of the disc, with impact 

damage to downstream LPT stages. All debris 

was contained within the engine casings. 

Preliminary findings show that the ISS fin 

had rubbed into the stage 2 vane honeycomb 

seal, which overheated and cracked, finally 

resulting in releasing a portion of the ISS area 

of the disc. 

This condition, if not detected and 

corrected, could lead to LPT stage 2 disc 

cracks, possibly resulting in an uncontained 

engine failure and subsequent damage to the 

aeroplane. 

We are issuing this AD to prevent cracks 

in the LPT disks, which could result in 

uncontained engine failure and damage 

to the airplane. You may obtain further 

information by examining the MCAI in 

the AD docket. 

Relevant Service Information 

RR has issued Repeater Technical 

Variance 125060, Issue 1, dated July 27, 

2012; Repeater Technical Variance 

125658, Issue 2, dated August 14, 2012; 

Alert Non-Modification Service Bulletin 

(NMSB) RB.211–72–AH054, Initial 

issue, dated September 14, 2012; and 

Alert NMSB RB.211–72–AH054, 

Revision 1, dated November 5, 2012. 

The actions described in this service 

information are intended to correct the 

unsafe condition identified in the 

MCAI. 

FAA’s Determination and Requirements 

of This AD 

This product has been approved by 

the United Kingdom and is approved for 

operation in the United States. Pursuant 

to our bilateral agreement with the 

European Community, they have 

notified us of the unsafe condition 

described in the MCAI and service 

information referenced above. We are 

issuing 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 

AD requires on-wing inspections of LPT 

disk seal fins and interstage seals when 

post-flight review of the EHM lowpressure rotor (N1) vibration data 

indicates maintenance-alert limits were 

exceeded in flight. The AD also requires 

in-shop inspections of the LPT disk seal 

fins and interstage seals to detect cracks 

or damage and, depending on the 

findings, the accomplishment of 

corrective action. 

FAA’s Determination of the Effective 

Date 

No domestic operators use this 

product. Therefore, we find that notice 

and opportunity for prior public 

comment are unnecessary and that good 

cause exists for making this amendment 

effective in less than 30 days. 

Comments Invited 

This AD is a final rule that involves 

requirements affecting flight safety, and 

we did not precede it by notice and 

opportunity for public comment. We 

invite you to send any written relevant 

data, views, or arguments about this AD. 

Send your comments to an address 

listed under the ADDRESSES section. 

Include ‘‘Docket No. FAA–2013–0030; 

Directorate Identifier 2012–NE–42–AD’’ 

at the beginning of your comments. We 

specifically invite comments on the 

overall regulatory, economic, 

environmental, and energy aspects of 

this AD. We will consider all comments 

received by the closing date and may 

amend this AD because of 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 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). 

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 AD will not 

have federalism implications under 

Executive Order 13132. This AD will 

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 AD: 

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 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. 

Adoption of the Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 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: 

2013–02–04 Rolls-Royce plc: Amendment 

39–17325; Docket No. FAA–2013–0030; 

Directorate Identifier 2012–NE–42–AD. 

(a) Effective Date 

This airworthiness directive (AD) becomes 

effective February 14, 2013. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Rolls-Royce plc (RR) 

RB211–Trent 970–84, RB211–Trent 970B–84, 


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6208 Federal Register / Vol. 78, No. 20 / Wednesday, January 30, 2013 / Rules and Regulations 

RB211–Trent 972–84, RB211–Trent 972B–84, 

RB211–Trent 977–84, RB211–Trent 977B–84, 

and RB211–Trent 980–84 engines, all serial 

numbers. 

(d) Reason 

This AD was prompted by a Trent 900 

engine experiencing low-pressure turbine 

(LPT) stage 2 disk interstage seal material 

loss and increased low-pressure rotor 

vibration while in flight. We are issuing this 

AD to prevent cracks in the LPT disk, which 

could result in uncontained engine failure 

and damage to the airplane. 

(e) Actions and Compliance 

Unless already done, do the following. 

(1) After every flight after the effective date 

of this AD, review the Engine Health 

Monitoring (EHM) low-pressure rotor (N1) 

vibration data. If you find that the maximum 

and average vibrations exceed 0.7 inches/sec 

(ips) and 0.5 ips, respectively, then within 10 

engine flight cycles, confirm that the 

vibration data was not the result of indicator 

error. 

(2) If you cannot show that the vibration 

increase was caused by indicator error, 

inspect the LPT disk seal fins and interstage 

seals. Use RR Repeater Technical Variance 

125060, Issue 1, dated July 27, 2012, to do 

the inspections. 

(3) After the effective date of this AD, at 

each engine shop visit inspect the LPT disk 

seal fins and interstage seals. Use RR Alert 

Non-Modification Service Bulletin RB.211– 

72–AH054, Revision 1, dated November 5, 

2012, or Initial Issue, dated September 14, 

2012, to do the inspections. 

(4) If, during the inspection required by 

paragraphs (e)(2) or (e)(3) of this AD, you find 

any cracks in the disk seal fins or that the 

interstage seals are missing seal material, 

replace the parts with hardware eligible for 

installation before returning the engine to 

service. 

(f) Definitions 

For the purposes of this AD, a shop visit 

is defined as whenever engine maintenance 

performed prior to reinstallation requires one 

of the following: 

(1) Separation of a pair of major mating 

engine module flanges. However, separation 

of flanges solely for the purpose of shipment 

without subsequent internal maintenance is 

not a shop visit. Separation of the external 

gearbox engine mating flanges or removal of 

the external gearbox is also not classified as 

a shop visit. 

(2) Removal of a disk, hub, or spool. 

(g) Credit for Previous Actions 

If you took corrective action before the 

effective date of this AD in accordance with 

RR Repeater Technical Variance 125658, 

Issue 2, dated August 14, 2012, for detected 

excessive vibration, you met the inspection 

requirements of this AD. 

(h) Alternative Methods of Compliance 

(AMOCs) 

The Manager, Engine Certification Office, 

may approve AMOCs for this AD. Use the 

procedures found in 14 CFR 39.19 to make 

your request. 

(i) 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) Refer to MCAI European Aviation 

Safety Agency AD 2012–0220, dated October 

22, 2012. 

(j) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Rolls-Royce plc (RR) Non-Modification 

Service Bulletin (NMSB) RB.211–72–AH054, 

Initial Issue, dated September 14, 2012. 

(ii) RR NMSB RB.211–72–AH054, Revision 

1, dated November 5, 2012. 

(iii) RR Repeater Technical Variance 

125060, Issue 1, dated July 27, 2012. 

(3) For service information identified in 

this AD, contact Rolls-Royce plc, Corporate 

Communications, P.O. Box 31, Derby, 

England, DE248BJ; phone: 011–44–1332– 

242424; fax: 011–44–1332–245418, or email: 

http://www.rolls-royce.com/contact/ 

civil_team.jsp. 

(4) You may view this service information 

at FAA, 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. 

(5) You may view this service information 

at the National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, call 

202–741–6030, or go to: http:// 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Burlington, Massachusetts, on 

January 15, 2013. 

Thomas A. Boudreau, 

Acting Manager, Engine & Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–01361 Filed 1–29–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF DEFENSE 

Office of the Secretary 

32 CFR Part 68 

[Docket No. DOD–2009–OS–0034] 

RIN 0790–AI50 

Voluntary Education Programs 

AGENCY: Office of the Under Secretary of 

Defense for Personnel and Readiness, 

DoD. 

ACTION: Final rule; notice of stay. 

SUMMARY: On Friday, December 7, 2012 

(77 FR 72941–72956), the Department of 

Defense published a final rule in the 

Federal Register titled Voluntary 

Education Programs. Subsequent to the 

publication of that rule, the Department 

discovered that the effective date in the 

DATES section was calculated 

incorrectly. The DoD is taking action to 

stay the rule to the appropriate effective 

date. 

DATES: Effective January 30, 2013, 32 

CFR part 68 is stayed until February 5, 

2013. 

FOR FURTHER INFORMATION CONTACT: 

Patricia Toppings, 571–372–0485. 

Dated: January 25, 2013. 

Aaron Siegel, 

Alternate OSD Federal Register Liaison 

Officer, Department of Defense. 

[FR Doc. 2013–01988 Filed 1–29–13; 8:45 am] 

BILLING CODE 5001–06–P 

DEPARTMENT OF HOMELAND 

SECURITY 

Coast Guard 

33 CFR Part 117 

[USCG–2013–0031] 

Drawbridge Operating Regulations; 

Gulf Intracoastal Waterway, Belle 

Chasse, LA 

AGENCY: Coast Guard, DHS. 

ACTION: Notice of deviation from 

drawbridge regulation. 

SUMMARY: The Coast Guard has issued a 

temporary deviation from the operating 

schedule that governs the Louisiana 

State Route 23 (LA 23) vertical lift span 

bridge, also known as the Judge Perez 

Bridge, across the Gulf Intracoastal 

Waterway (Algiers Alternate Route), 

mile 3.8, at Belle Chasse, Plaquemines 

Parish, Louisiana. This deviation is 

necessary to repair bridge machinery 

and to replace the wire ropes of the 

bridge. This deviation allows the bridge 

to remain closed to navigation for eight 

consecutive days in order to perform 

scheduled maintenance. 

DATES: This deviation is effective from 

6 a.m. on Sunday, February 24, 2013, 

until 6 a.m. on Monday, March 4, 2013. 

ADDRESSES: The docket for this notice, 

docket number USCG–2013–0031, is 

available online. To view it, go to http:// 

www.regulations.gov, type the docket 

number in the ‘‘SEARCH’’ box and click 

‘‘SEARCH.’’ Click on Open Docket 

Folder on the line associated with this 

notice of deviation. You may also visit 

the Docket Management Facility in 

Room W12–140 on the ground floor of 


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