Federal Register / Vol. 78, No. 115 / Friday, June 14, 2013 / Rules and Regulations 35749 

(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): 

2013–12–02 Engine Alliance: Amendment 

39–17479; Docket No. FAA–2012–1329; 

Directorate Identifier 2012–NE–46–AD. 

(a) Effective Date 

This AD is effective July 19, 2013. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Engine Alliance 

GP7270 and GP7277 turbofan engines with a 

high-pressure compressor (HPC) stage 6 disk, 

part number (P/N) 382–100–505–0, installed. 

(d) Unsafe Condition 

This AD was prompted by damage to the 

HPC stage 7–9 spool caused by failure of the 

baffle plate feature on affected HPC stage 6 

disks. We are issuing this AD to prevent 

failure of the HPC stage 7–9 spool, 

uncontained engine failure, and damage to 

the airplane. 

(e) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(f) Borescope Inspections 

(1) For HPC stage 6 disks with fewer than 

1,000 cycles- since- new (CSN) on the 

effective date of this AD, initially borescope 

inspect the baffle plate feature on the disk 

(360 degrees) before accumulating 1,500 

CSN. 

(2) For HPC stage 6 disks with 1,000 CSN 

or more on the effective date of this AD, 

initially borescope inspect the baffle plate 

feature on the disk (360 degrees) within the 

next 500 cycles-in-service (CIS). 

(3) Thereafter, repetitively borescope 

inspect the baffle plate feature on the disk 

(360 degrees) within every 500 CIS. 

(4) Remove the HPC stage 6 disk within 50 

additional CIS, if the baffle plate feature is 

found cracked or missing material. 

(g) Mandatory Removal From Service of 

Affected HPC Stage 6 Disks 

At next HPC module exposure, but not to 

exceed 6,800 CSN on the HPC stage 6 disk, 

remove the HPC stage 6 disk, P/N 382–100– 

505–0, from the engine. 

(h) Installation Prohibition 

After the effective date of this AD, do not 

install any HPC stage 6 disk, P/N 382–100– 

505–0, into any HPC module. 

(i) Definition 

For the purpose of this AD, HPC module 

exposure is defined as disassembly of the 

compressor to where the HPC rotor assembly 

is removed and accessible. 

(j) 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. 

(k) Related Information 

(1) For more information about this AD, 

contact Martin Adler, Aerospace Engineer, 

Engine & Propeller Directorate, FAA, 12 New 

England Executive Park, Burlington, MA 

01803; phone: 781–238–7157; fax: 781–238– 

7199; email: martin.adler@faa.gov. 

(2) Engine Alliance Service Bulletin Nos. 

EAGP7–72–236, EAGP7–72–237, and 

EAGP7–72–240, pertain to the subject of this 

AD. 

(3) For service information identified in 

this AD, contact Engine Alliance, 411 Silver 

Lane, East Hartford, CT 06118, phone: 800– 

565–0140; Web site: 

https://www.engineallianceportal.com. 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. 

(l) Material Incorporated by Reference 

None. 

Issued in Burlington, Massachusetts, on 

June 7, 2013. 

Robert J. Ganley, 

Acting Assistant Manager, Engine & Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–14040 Filed 6–13–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–1221; Directorate 

Identifier 2012–NM–151–AD; Amendment 

39–17474; AD 2013–11–14] 

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 

and –300 series airplanes. This AD was 

prompted by reports of hydraulic fluid 

contamination (including contamination 

caused by hydraulic fluid in its liquid, 

vapor, and/or solid (coked) form) found 

in the strut forward dry bay. This AD 

requires repetitive general visual 

inspections of the strut forward dry bay 

for the presence of hydraulic fluid, and 

related investigative and corrective 

actions (including checking drain lines 

for blockage due to hydraulic fluid 

coking, and cleaning or replacing drain 

lines to allow drainage) if necessary. We 

are issuing this AD to detect and correct 

hydraulic fluid contamination of the 

strut forward dry bay, which could 

result in hydrogen embrittlement of the 

titanium forward engine mount 

bulkhead fittings, and consequent 

inability of the fittings to carry engine 

loads, resulting in engine separation. 

Hydraulic embrittlement also could 

cause a through-crack formation across 

the fittings through which an engine fire 

could breach into the strut, resulting in 

an uncontained strut fire. 

DATES: This AD is effective July 19, 

2013. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of July 19, 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, WA 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, WA. For information on 

the availability of this material at the 

FAA, call 425–227–1221. 

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35750 Federal Register / Vol. 78, No. 115 / Friday, June 14, 2013 / Rules and Regulations 

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: 

Kevin Nguyen, Aerospace Engineer, 

Propulsion Branch, ANM–140S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue SW., Renton, WA 

98057–3356; phone: 425–917–6501; fax: 

425–917–6590; email: 

kevin.nguyen@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 December 4, 2012 (77 FR 

71731). That NPRM proposed to require 

repetitive general visual inspections of 

the strut forward dry bay for the 

presence of hydraulic fluid, and related 

investigative and corrective actions if 

necessary. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the proposal (77 FR 71731, 

December 4, 2012) and the FAA’s 

response to each comment. 

Concurrence With NPRM (77 FR 71731, 

December 4, 2012) 

Boeing concurred with the content of 

the NPRM (77 FR 71731, December 4, 

2012). 

Request for Delegation of Repair 

Method Approval to Organization 

Designation Authorization (ODA) 

All Nippon Airways Co., Ltd., (ANA) 

requested that we delegate the approval 

for a repair method to the Boeing ODA 

in order to minimize the downtime of 

the airplane. ANA noted that paragraph 

(h)(2) of the NPRM (77 FR 71731, 

December 4, 2012) requires repair in 

accordance with a method approved by 

the Seattle Aircraft Certification Office, 

while the service information states to 

contact Boeing for repairs. 

We agree that approval of the repairs 

can be delegated to the Boeing ODA for 

this AD. As stated in the NPRM (77 FR 

71731, December 4, 2012), paragraph 

(i)(3) of the NPRM already specifies that 

an alternative method of compliance 

(AMOC) may be used for any repair 

required by this AD if it is approved by 

the Boeing Commercial Airplanes ODA 

that has been authorized by the 

Manager, Seattle Aircraft Certification 

Office, to make those findings. However, 

we have revised paragraph (h)(2) of this 

AD to reference paragraph (i) of this AD 

for repair approvals. 

Request for Information 

Mark Sokolow requested that we 

provide information on which airplanes 

the hydraulic fluid contamination 

occurred, and on which flights. The 

commenter quoted an Open 

Government Directive issued by the 

Office of Management and Budget on 

December 8, 2009, (http:// 

www.whitehouse.gov/sites/default/files/ 

omb/assets/memoranda_2010/m10- 

06.pdf), which presented a 60-day 

timetable to ‘‘respect the presumption of 

openness by publishing information 

online.’’ The author of that directive 

reminded agencies that government has 

defined guidelines as to the objectivity 

of information, which focuses on 

whether the ‘‘disseminated information 

is being presented in an accurate, clear, 

complete and unbiased manner. This 

involves whether the information is 

being presented within a proper context. 

(Guidelines, 2001, p. 8459).’’ 

We infer that the commenter is 

requesting information regarding 

specific airplanes that originally 

exhibited the unsafe condition. Boeing 

Special Attention Service Bulletin 777– 

54–0028, dated May 25, 2012, which is 

referenced in the NPRM (77 FR 71731, 

December 4, 2012), identifies Model 777 

airplanes that have accumulated 

approximately 9,900 to 29,000 flight 

cycles and 13,000 to 33,300 flight hours, 

as the affected airplanes. However, 

individual operator data might be 

considered proprietary; therefore, we do 

not publish individual operator 

information of this type in ADs. No 

change has been made to this AD in this 

regard. 

Request for Identification of Repairs 

Mark Sokolow also requested that we 

delineate mechanical repairs that can be 

completed to stop the hydraulic fluid 

contamination. 

We note that, at this time, a 

terminating action is not available. The 

manufacturer is currently working on a 

terminating action; however, the 

required inspections and any necessary 

cleaning or drain line replacement 

adequately addresses the unsafe 

condition. If a terminating action 

becomes available, we might consider 

further rulemaking at that time. No 

change has been made to the AD in this 

regard. 

Clarification of Terminology 

We have determined that an 

explanation of hydraulic fluid 

contamination is needed for 

clarification purposes in this AD. 

Hydraulic fluid contamination includes, 

but is not limited to, contamination 

caused by hydraulic fluid in its liquid, 

vapor, and/or solid (coked) form. 

Hydraulic fluid in any of these forms 

can be a contaminant to the structure 

and its coating (primer, paint, leveling 

compound, sealant, etc.) in the strut 

forward dry bay. Boeing has confirmed 

that ‘‘hydraulic fluid contamination’’ 

used in the service information is 

understood to be contamination caused 

by hydraulic fluid in its liquid, vapor, 

and/or solid (coked) form. We have 

added this clarification to the Summary 

section of the AD preamble and to 

paragraphs (e) and (g) of this AD. 

Clarification of Related Investigative 

and Corrective Actions 

We have included the parenthetical 

phrase, ‘‘including checking drain lines 

for blockage due to hydraulic fluid 

coking, and cleaning or replacing drain 

lines to allow drainage’’ to clarify the 

related investigative and corrective 

actions specified in paragraph (g) of this 

AD. Hydraulic fluid can enter the dry 

bay through the condensate drain line 

which connects to the system 

disconnect box drain lines. The system 

disconnect box drain hose can clog due 

to hydraulic fluid coking in the drain 

lines, which allows hydraulic fluid to 

back up into the strut forward dry bay 

through the condensate drain line. 

Although the NPRM (77 FR 71731, 

December 4, 2012) describes these 

actions, we want to emphasize the 

importance of these actions by 

including them in the final rule. 

Correction to Paragraph (c) of This AD 

We have corrected the series 

designation of the engine to Pratt & 

Whitney ‘‘PW4000’’ series engines in 

paragraph (c) of this AD. 

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 

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Federal Register / Vol. 78, No. 115 / Friday, June 14, 2013 / Rules and Regulations 35751 

and minor editorial changes. We have 

determined that these minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM (77 FR 

71731, December 4, 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 71731, 

December 4, 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 55 

airplanes of U.S. registry. 

We estimate the following costs to 

comply with this AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per product Cost on U.S. 

operators 

Repetitive general visual inspections.5 work-hours × $85 per hour 

= $425 per inspection cycle.

$0 $425 per inspection cycle ...... $23,375 per inspection cycle. 

We estimate the following costs to do 

any actions that would be required 

based on the results of the inspection. 

We have no way of determining the 

number of aircraft that might need these 

actions. 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Detailed inspection ....................................................... 8 work-hours × $85 per hour = $680 ........................... $0 $680 

Check drain lines (including cleaning or replacing) ..... 5 work-hours × $85 per hour = $425 ........................... 0 425 

Detailed inspection and high frequency eddy current 

inspection.

8 work-hours × $85 per hour = $680 ........................... 0 680 

Clean and restore sealant, primer and leveling compound.8 work-hours × $85 per hour = $680 ........................... 0 680 

We have received no definitive data 

that would enable us to provide a cost 

estimate for the on-condition repair 

specified in this AD. 

According to the manufacturer, some 

of the costs of this AD may be covered 

under warranty, thereby reducing the 

cost impact on affected individuals. We 

do not control warranty coverage for 

affected individuals. As a result, we 

have included all costs in our cost 

estimate. 

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): 

2013–11–14 The Boeing Company: 

Amendment 39–17474; Docket No. 

FAA–2012–1221; Directorate Identifier 

2012–NM–151–AD. 

(a) Effective Date 

This AD is effective July 19, 2013. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 777–200 and –300 series airplanes; 

certificated in any category; equipped with 

Pratt & Whitney PW4000 series engines; as 

identified in Boeing Special Attention 

Service Bulletin 777–54–0028, dated May 25, 

2012. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 54, Nacelles/pylons. 

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35752 Federal Register / Vol. 78, No. 115 / Friday, June 14, 2013 / Rules and Regulations 

(e) Unsafe Condition 

This AD was prompted by reports of 

hydraulic fluid contamination (including 

contamination caused by hydraulic fluid in 

its liquid, vapor, and/or solid (coked) form) 

found in the strut forward dry bay. We are 

issuing this AD to detect and correct 

hydraulic fluid contamination of the strut 

forward dry bay, which could result in 

hydrogen embrittlement of the titanium 

forward engine mount bulkhead fittings, and 

consequent inability of the fittings to carry 

engine loads, resulting in engine loss. 

Hydraulic embrittlement also could cause a 

through-crack formation across the fittings 

through which an engine fire could breach 

into the strut, resulting in an uncontained 

strut fire. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Inspection 

Except as provided by paragraph (h)(1) of 

this AD, at the times specified in paragraph 

1.E., ‘‘Compliance,’’ of Boeing Special 

Attention Service Bulletin 777–54–0028, 

dated May 25, 2012: Do a general visual 

inspection for hydraulic fluid contamination 

(including contamination caused by 

hydraulic fluid in its liquid, vapor, and/or 

solid (coked) form) of the interior of the strut 

forward dry bay, and do all applicable related 

investigative and corrective actions 

(including checking drain lines for blockage 

due to hydraulic fluid coking, and cleaning 

or replacing drain lines to allow drainage) if 

necessary, in accordance with the 

Accomplishment Instructions of Boeing 

Special Attention Service Bulletin 777–54– 

0028, dated May 25, 2012, except as required 

by paragraph (h)(2) of this AD. Repeat the 

inspection thereafter at the times specified in 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Special Attention Service Bulletin 777–54– 

0028, dated May 25, 2012. Except as required 

by paragraph (h)(3) of this AD, do all 

applicable related investigative and 

corrective actions at the times specified in 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Special Attention Service Bulletin 777–54– 

0028, dated May 25, 2012. 

(h) Exceptions to the Service Information 

(1) Where the Compliance time column of 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Service Bulletin 777–54–0028, dated May 25, 

2012, refers to the compliance time ‘‘after the 

original issue date of this service bulletin,’’ 

this AD requires compliance within the 

specified compliance time after the effective 

date of this AD. 

(2) Where Boeing Special Attention Service 

Bulletin 777–54–0028, dated May 25, 2012, 

specifies to contact Boeing for repair: Except 

as required by paragraph (h)(3) of this AD, at 

the applicable times specified in paragraph 

1.E., ‘‘Compliance,’’ of Boeing Special 

Attention Service Bulletin 777–54–0028, 

dated May 25, 2012, repair, using a method 

approved in accordance with the procedures 

specified in paragraph (i) of this AD. 

(3) Where paragraph 1.E., ‘‘Compliance,’’ of 

Boeing Special Attention Service Bulletin 

777–54–0028, dated May 25, 2012, specifies 

a compliance time of ‘‘within 25 flight-cycles 

or 10 days, whichever occurs first,’’ this AD 

requires compliance within 25 flight cycles 

or 10 days after the most recent inspection 

required by paragraph (g) of this AD, 

whichever occurs first. 

(i) 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. 

(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. 

(j) Related Information 

For more information about this AD, 

contact Kevin Nguyen, Aerospace Engineer, 

Propulsion Branch, ANM–140S, FAA, Seattle 

Aircraft Certification Office, 1601 Lind 

Avenue SW., Renton, WA 98057–3356; 

phone: 425–917–6501; fax: 425–917–6590; 

email: kevin.nguyen@faa.gov. 

(k) 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 777–54–0028, dated May 25, 2012. 

(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 May 24, 

2013. 

Jeffrey E. Duven, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–13294 Filed 6–13–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–0458; Directorate 

Identifier 2013–NE–19–AD; Amendment 

39–17480; AD 2013–12–03] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG 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 Deutschland Ltd & Co KG 

(RRD) BR700–725A1–12 turbofan 

engines with fuel pump tube part 

number FW64852 installed. This AD 

requires removal of the affected fuel 

pump tube and its replacement with a 

part eligible for installation. This AD 

was prompted by the discovery that 

cracks have occurred in the affected fuel 

pump tube between the fuel metering 

unit and the main fuel pump. We are 

issuing this AD to prevent loss of fuel 

supply to the engine, which could result 

in in-flight engine shutdown of one or 

more engines, loss of thrust control and 

damage to the airplane. 

DATES: This AD becomes effective June 

14, 2013. 

We must receive comments on this 

AD by July 29, 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. 

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