17294 Federal Register / Vol. 78, No. 55 / Thursday, March 21, 2013 / Rules and Regulations 

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 Rebel Nichols, Aerospace Engineer, 

Propulsion Branch, ANM–140S, FAA, 1601 

Lind Avenue SW., Renton, WA 98057–3356; 

phone: 425–917–6509; fax: 425–917–6590; 

email: rebel.nichols@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, WA 98124–2207; telephone 206– 

544–5000, extension 1; fax 206–766–5680; 

Internet https://www.myboeingfleet.com. 

(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. 

(i) Boeing Service Bulletin 777–28A0034, 

Revision 2, dated September 20, 2010. 

(ii) Reserved. 

(3) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, WA 98124–2207; telephone 206– 

544–5000, extension 1; fax 206–766–5680; 

Internet https://www.myboeingfleet.com. 

(4) You may view this service information 

at FAA, Transport Airplane Directorate, 1601 

Lind Avenue SW., Renton, WA. For 

information on the availability of this 

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

(5) 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 February 

25, 2013. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2013–05199 Filed 3–20–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–0597; Directorate 

Identifier 2012–NM–054–AD; Amendment 

39–17377; AD 2013–05–05] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 777–200, 

–200LR, –300, and –300ER series 

airplanes. This AD was prompted by 

reports of in-service events related to 

electrical power system malfunctions 

resulting in damage to electrical load 

management system (ELMS) P200 and 

P300 power panels and the surrounding 

area. This AD requires installing 

enclosure trays to contain debris in 

certain ELMS panels, and replacing 

certain ELMS contactors. We are issuing 

this AD to prevent contactor failures, 

which could result in uncontained hot 

debris flow due to ELMS contactor 

breakdown, consequent smoke and heat 

damage to airplane structure and 

equipment during ground operations, 

and possible injuries to passengers and 

crew. 

DATES: This AD is effective April 25, 

2013. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of April 25, 2013. 

ADDRESSES: 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, 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. 

Examining the AD Docket 

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: 

Georgios Roussos, Aerospace Engineer, 

Systems and Equipment Branch, ANM– 

130S, Seattle Aircraft Certification 

Office (ACO), FAA, 1601 Lind Avenue 

SW., Renton, Washington 98057–3356; 

phone: 425–917–6482; fax: 425–917– 

6590; email: georgios.roussos@faa.gov. 

SUPPLEMENTARY INFORMATION:

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM published in the Federal 

Register on June 18, 2012 (77 FR 36206). 

That NPRM proposed to require 

installing enclosure trays to contain 

debris in certain ELMS panels, and 

replacing certain ELMS contactors in 

the P200 and P300 ELMS panels. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the proposal (77 FR 36206, 

June 18, 2012) and the FAA’s response 

to each comment. 

Request To Allow Certain Installations 

of Removed Contactors 

Cathay Pacific Airways (Cathay) and 

All Nippon Airways (All Nippon) 

requested that we clarify the proposed 

requirement to discard the removed 

contactors. The commenters requested 

that we identify certain inspection 

criteria that would allow further use of 

these contactors on non-AD-affected 

locations and ease the financial burden 

of discarding removed but serviceable 

power contactors. 

We partially agree with the request. 

The note in paragraphs 3.B.3 and 3.B.4 

of the Accomplishment Instructions of 

Boeing Special Attention Service 

Bulletin 777–24–0112, Revision 2, dated 

December 14, 2011, specifies discarding 

these parts. We agree that power 

contactors that have been appropriately 

overhauled to the manufacturer’s 

original specifications may meet criteria 

for safe operation in non-AD-affected 

locations. But this AD applies to the 

affected airplanes, not the contactors; 

the AD therefore cannot mandate the 

disposition of contactors removed from 


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the airplane. Further, power contactors 

that are removed from the AD-affected 

ELMS panel location are considered 

compromised parts and may not be 

installed ‘‘as is’’ in other non-ADaffected locations. We have added new 

paragraph (j)(2) in this final rule to 

provide for the re-installation of the 

contactors, provided they are first 

inspected and tested, and repaired if 

necessary, in accordance with a method 

approved by the Seattle Aircraft 

Certification Office (ACO). 

Concern for Effect of Ongoing 

Maintenance on AD Compliance 

Cathay was concerned that operators 

would have difficulty ensuring 

compliance with the proposed 

requirements in ongoing maintenance. 

According to Cathay, operators are 

unable to purge the stock with part 

number (P/N) ELM827–1 contactors still 

installed on the P100 panel. 

We acknowledge Cathay’s concern for 

allowing installation of the P/N 

ELM827–1 contactors within the P100 

ELMS panel. We disagree, however, 

with Cathay’s inference that this is 

difficult to accomplish on the other 

panel, because proper maintenance 

documentation and personnel training 

can secure ongoing compliance with the 

AD requirements. Furthermore, we are 

not aware of any issues associated with 

these power contactors within the P100 

ELMS panel that would warrant any 

regulatory action against this panel 

installation. We have not changed the 

final rule regarding this issue. 

Request To Allow Contactor 

Replacement as Optional 

Korean Air Lines and Air France 

requested that we reconsider the 

proposed requirement to replace the 

power contactors. Korean Air Lines 

stated that Boeing introduced, in 

addition to the tray installation, certain 

improvements to the ELMS panel, such 

as the installation of a cooling duct and 

internal inspection of the panel. Korean 

Air Lines considered these additional 

improvements sufficient to provide 

safety for the passengers. Korean Air 

Lines requested that the power 

contactor replacement become optional 

if the tray enclosures and the cooling 

duct were installed. Air France 

explained its choice to replace the 

power contactor within the P300 ELMS 

panel because inspections revealed a 

number of panels and contactors with 

evidence of overheating and/or silver 

deposits. Air France further pointed to 

inspections on the P200 ELMS panel 

that did not identify any damage. Air 

France asserted that there is no 

technical or reliability benefit to the 

requirement to replace the power 

contactors, and requested that we 

reconsider the requirement. 

We disagree. Our data indicate a 

number of in-service failures of power 

contactors installed within the P200 and 

P300 ELMS panels. While installation of 

the tray enclosures may limit the extent 

of the damage within the affected power 

panel, power contactor failures 

nevertheless generate excessive heat and 

smoke that may lead to aircraft 

emergency evacuation and potential 

passenger injuries. While the cooling 

duct provides a better operating 

environment for the power contactors, 

its installation does not necessarily 

address the kind of internal contactor 

failures that may result from operating 

at power levels so near the rated 

capacity and could lead to thermal 

degradation of materials, which further 

reduce contactor protection and can 

lead to loose parts within the contactor 

that may increase the probability of 

arcing. We have not changed the final 

rule regarding this issue. 

Request To Clarify Cost Estimate 

United Airlines questioned the high 

cost of the replacement parts relative to 

parts outsourcing and liability concerns. 

Air France considered that the cost of 

the replacement is not justified by any 

technical or reliability benefit, and 

offered two solutions: (1) a substantially 

reduced contactor price or (2) use of P/ 

N ELM827–1 as spares, provided certain 

preventive measures were taken. 

We partially agree. We have been 

informed that Boeing is negotiating 

certain price reductions with its 

contactor supplier. However, we have 

determined that replacement of these 

parts is necessary for continued safe 

flight, and we have therefore not 

changed the final rule regarding this 

issue. Regarding use of P/N ELM827–1 

as spares, as discussed previously, we 

have added new paragraph (j)(2) in this 

final rule to provide for re-installation of 

the contactors, if done using a method 

approved by the Seattle ACO. 

Request To Allow Credit for Certain 

Revised Service Information 

Boeing requested that we revise Note 

1 to paragraph (g) of the NPRM (77 FR 

36206, June 18, 2012) to include prior 

revisions of the specified Smiths service 

information. Boeing added that Boeing 

Special Attention Service Bulletin 777– 

24–0106, dated July 20, 2007 

(referenced in the NPRM as the 

appropriate source of service 

information for the tray installation), 

does not identify a specific revision 

level of the Smiths service information. 

Boeing reported that the next revision of 

Boeing Service Bulletin 777–24–0106 

will include the revision levels per the 

proposed AD, but that the subsequent 

changes, which are related to ease of 

installation only, were not necessary to 

ensure safety. 

We agree that the changes introduced 

to the referenced revised GE Aviation 

(Smiths) service information are not 

necessary to ensure safety. We have 

determined that the information in Note 

1 to paragraph (g) of the NPRM (77 FR 

36206, June 18, 2012), as well as Note 

2 to paragraph (h) of the NPRM, is 

unnecessary; these notes have been 

removed from the AD. 

Concern Regarding Quality Oversight 

Recognizing the proposed 

requirement to upgrade to the more 

robust contactors, as specified in the 

NPRM (77 FR 36206, June 18, 2012), 

and noting the benefits of containment 

trays, United Airlines expressed its 

hope that the NPRM addressed all 

compromised areas of concern regarding 

the equipment. The commenter also 

expressed concern about contactor 

quality oversight. 

We infer that the commenter agrees 

with the requirements of this final rule. 

We also recognize the importance of 

parts quality oversight to prevent 

failures on high-power contactors that 

could potentially cause significant 

airplane damage. We understand that 

both Boeing and the parts supplier have 

increased their quality oversight of the 

contactors. There is no need to change 

the final rule regarding this issue. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting the AD 

with the changes described previously 

and minor editorial changes. We have 

determined that these minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM (77 FR 

36206, June 18, 2012) for correcting the 

unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM (77 FR 36206, 

June 18, 2012). 

We also determined that these 

changes will not increase the economic 

burden on any operator or increase the 

scope of the AD. 

Costs of Compliance 

We estimate that this AD affects 128 

airplanes of U.S. registry. We estimate 

the following costs to comply with this 

AD: 


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17296 Federal Register / Vol. 78, No. 55 / Thursday, March 21, 2013 / Rules and Regulations 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per product 

Cost on U.S. 

operators 

Tray installation ............................................... 3 work-hours × $85 per hour = $255 ............. $1,729 $1,984 $253,952 

Contactor replacement .................................... 6 work-hours × $85 per hour = $510 ............. 49,317 49,827 6,377,856 

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 

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 that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979), 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) 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. 

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 airworthiness 

directive (AD): 

2013–05–05 The Boeing Company: 

Amendment 39–17377; Docket No. 

FAA–2012–0597; Directorate Identifier 

2012–NM–054–AD. 

(a) Effective Date 

This AD is effective April 25, 2013. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 777–200, –200LR, –300, and –300ER 

series airplanes; certificated in any category; 

as identified in Boeing Special Attention 

Service Bulletin 777–24–0106, dated July 20, 

2007; and Boeing Special Attention Service 

Bulletin 777–24–0112, Revision 2, dated 

December 14, 2011. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 24, Electrical power. 

(e) Unsafe Condition 

This AD was prompted by reports of inservice events related to electrical power 

system malfunctions resulting in damage to 

electrical load management system (ELMS) 

P200 and P300 power panels and the 

surrounding area. We are issuing this AD to 

prevent contactor failures, which could result 

in uncontained hot debris flow due to ELMS 

contactor breakdown, consequent smoke and 

heat damage to airplane structure and 

equipment during ground operations, and 

possible injuries to passengers and crew. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Tray Installation 

For airplanes identified in Boeing Special 

Attention Service Bulletin 777–24–0106, 

dated July 20, 2007: Within 36 months after 

the effective date of this AD, install enclosure 

trays to contain debris in the ELMS panels, 

in accordance with the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 777–24–0106, dated July 20, 

2007. 

(h) Contactor Replacement 

For airplanes identified in Boeing Special 

Attention Service Bulletin 777–24–0112, 

Revision 2, dated December 14, 2011: Within 

60 months after the effective date of this AD, 

replace specified electrical power contactors 

in the ELMS P200 and P300 power panels 

with new contactors, in accordance with the 

Accomplishment Instructions of Boeing 

Special Attention Service Bulletin 777–24– 

0112, Revision 2, dated December 14, 2011, 

except as provided by paragraph (j)(2) of this 

AD. 

(i) Credit for Previous Actions 

This paragraph provides credit for the 

replacement of the ELMS contactors required 

by paragraph (h) of this AD, if those actions 

were performed before the effective date of 

this AD using Boeing Special Attention 

Service Bulletin 777–24–0112, dated 

February 19, 2009; or Revision 1, dated June 

30, 2011. These service bulletins are not 

incorporated by reference in this AD. 

(j) Parts Installation 

(1) Except as required by paragraph (j)(2) 

of this AD: As of the effective date of this AD, 

no person may install, on any airplane, a 

contactor having part number ELM827–1 in 

the ELMS panels and locations identified in 

this AD, except as required by paragraph 

(j)(2) of this AD. 

(2) This paragraph provides operators with 

the option not to discard the removed power 

contactors, in contrast with the note in steps 

3.B.3 and 3.B.4 of the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 777–24–0112, Revision 2, 

dated December 14, 2011. This AD allows reinstallation of removed power contactors, if 

done using a method approved in accordance 

with the procedures specified in paragraph 

(k) of this AD. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle Aircraft 

Certification Office (ACO), FAA, has the 

authority to approve AMOCs for this AD, if 

requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

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. 


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(l) Related Information 

(1) For more information about this AD, 

contact Georgios Roussos, Aerospace 

Engineer, Systems and Equipment Branch, 

ANM–130S, Seattle Aircraft Certification 

Office (ACO), FAA, 1601 Lind Avenue SW., 

Renton, Washington 98057–3356; phone: 

425–917–6482; fax: 425–917–6590; email: 

georgios.roussos@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. 

(m) 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) Boeing Special Attention Service 

Bulletin 777–24–0106, dated July 20, 2007. 

(ii) Boeing Special Attention Service 

Bulletin 777–24–0112, Revision 2, dated 

December 14, 2011. 

(3) 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. 

(4) 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. 

(5) 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 February 

28, 2013. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2013–05589 Filed 3–20–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–0004; Directorate 

Identifier 2012–NE–01–AD; Amendment 39– 

17390; AD 2013–05–18] 

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 superseding an 

existing airworthiness directive (AD) for 

all Rolls-Royce plc (RR) RB211 Trent 

500 series turbofan engines. That AD 

currently requires a one-time inspection 

of the fuel tubes and fuel tube clips for 

evidence of damage, wear, and fuel 

leakage. This AD requires the same 

inspection, and adds additional 

repetitive inspections. This AD was 

prompted by additional RR engineering 

analysis. We are issuing this AD to 

prevent engine fuel leaks, which could 

result in engine damage and damage to 

the airplane. 

DATES: This AD is effective April 5, 

2013. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of April 5, 2013. 

We must receive any comments on 

this AD by May 6, 2013. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE., 

Washington, DC 20590. 

• Hand Delivery: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE., 

Washington, DC 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. 

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– 

1332–249936; 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 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 street address for 

the Docket Office (phone: 800–647– 

5527) is 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 

On January 19, 2012, we issued AD 

2012–02–04, Amendment 39–16927 (77 

FR 6668, February 9, 2012), for all RR 

RB211 Trent 500 series turbofan 

engines. That AD requires a one-time 

inspection of the fuel tubes and fuel 

tube clips for evidence of damage, wear, 

and fuel leakage. That AD resulted from 

reports of wear found between the 

securing clips and the low-pressure (LP) 

fuel tube outer surface, which reduces 

the fuel tube wall thickness, leading to 

fracture of the fuel tube and consequent 

fuel leakage. We issued that AD to 

prevent engine fuel leaks, which could 

result in engine damage and damage to 

the airplane. 

Actions Since AD Was Issued 

Since we issued AD 2012–02–04, 

Amendment 39–16927 (77 FR 6668, 

February 9, 2012), RR engineering 

determined that additional repetitive 

inspections are required. The European 

Aviation Safety Agency (EASA) has 

notified us of this unsafe condition and 

corrective actions in EASA AD 2012– 

0237R1, dated November 14, 2012. 

Relevant Service Information 

We reviewed RR Alert NonModification Service Bulletin (NMSB) 

RB.211–73–AG948, dated September 28, 

2012. The NMSB describes procedures 

for inspection and possible removal and 

replacement of the LP fuel tubes, fuel 


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