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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