Federal Register / Vol. 77, No. 66 / Thursday, April 5, 2012 / Rules and Regulations 20505 

and leaf grade of American upland 

cotton, and fiber property measurements 

such as micronaire. High Volume 

Instruments will determine all fiber 

property measurements except 

extraneous matter. High Volume 

Instrument colormeter measurements 

will be used for determining the official 

color grade. Cotton classers authorized 

by the Cotton and Tobacco Programs 

will determine the presence of 

extraneous matter and authorized 

employees of the Cotton and Tobacco 

Programs will determine all fiber 

property measurements using High 

Volume Instruments. 

PART 28—[AMENDED] 

■ 3. The authority citation for 7 CFR 

part 28 continues to read as follows: 

Authority: 7 U.S.C. 55 and 61. 

■ 4. Section 28.8 is revised to read as 

follows: 

§ 28.8 Classification of cotton; 

determination. 

For the purposes of The Act, the 

classification of any cotton shall be 

determined by the quality of a sample 

in accordance with Universal Cotton 

Standards (the official cotton standards 

of the United States) for the color grade 

and the leaf grade of American upland 

cotton, the length of staple, and fiber 

property measurements such as 

micronaire. High Volume Instruments 

will determine all fiber property 

measurements except extraneous matter, 

special conditions and remarks. High 

Volume Instrument colormeter 

measurements will be used for 

determining the official color grade. 

Cotton classers authorized by the Cotton 

and Tobacco Programs will determine 

the presence of extraneous matter, 

special conditions and remarks and 

authorized employees of the Cotton and 

Tobacco Programs will determine all 

fiber property measurements using High 

Volume Instruments. The classification 

record of a Classing Office or the 

Quality Control Division with respect to 

any cotton shall be deemed to be the 

classification record of the Department. 

Dated: March 30, 2012. 

Robert C. Keeney, 

Acting Administrator, Agricultural Marketing 

Service. 

[FR Doc. 2012–8125 Filed 4–4–12; 8:45 am] 

BILLING CODE 3410–02–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0908; Directorate 

Identifier 2009–NM–067–AD; Amendment 

39–16987; AD 2012–06–06] 

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 757 

airplanes. This AD requires replacing 

the power control relays for the fuel 

boost pumps and override pumps with 

new relays having a ground fault 

interrupter (GFI) feature. This AD also 

requires an electrical bonding resistance 

measurement for certain GFI relays to 

verify that certain bonding requirements 

are met. This AD also requires, for 

certain airplanes, an inspection to 

ensure that certain screws are properly 

installed, and installing longer screws if 

necessary. This AD was prompted by 

fuel system reviews conducted by the 

manufacturer. We are issuing this AD to 

prevent damage to the fuel pumps 

caused by electrical arcing that could 

introduce an ignition source in the fuel 

tank, which, in combination with 

flammable fuel vapors, could result in a 

fuel tank explosion and consequent loss 

of the airplane. 

DATES: This AD is effective May 10, 

2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of May 10, 2012. 

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; email 

me.boecom@boeing.com; 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. 

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, 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 supplemental notice of 

proposed rulemaking (SNPRM) to 

amend 14 CFR part 39 to include an 

airworthiness directive (AD) that would 

apply to the specified products. That 

SNPRM was published in the Federal 

Register on January 3, 2011 (76 FR 28). 

The original NPRM (74 FR 53436, 

October 19, 2009) proposed to require 

replacing the power control relays for 

the fuel boost pumps and override 

pumps with new relays having a GFI 

feature. The SNPRM proposed to add an 

electrical bonding resistance 

measurement for certain GFI relays to 

verify that certain bonding requirements 

are met. The SNPRM also proposed to 

add, for certain airplanes, an inspection 

to ensure that certain screws are 

properly installed, and installing longer 

screws if necessary. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the SNPRM (76 FR 28, 

January 3, 2011) and the FAA’s response 

to each comment. Boeing concurs with 

the contents of the SNPRM. 

Request To Permit Incorporation of 

Universal Fault Interrupter (UFI) as a 

Means of Compliance 

American Airlines (AA) and TDG 

Aerospace requested that we revise the 

SNPRM (76 FR 28, January 3, 2011) to 

allow incorporation of the previouslyapproved Supplemental Type Certificate 

(STC) ST01950LA, issued January 17, 

2007, as an approved means of 

compliance for providing fault 

protection for the center override fuel 

pumps. The commenters stated that the 


rmajette on DSK2TPTVN1PROD with RULES
20506 Federal Register / Vol. 77, No. 66 / Thursday, April 5, 2012 / Rules and Regulations 

UFI, in accordance with STC 

ST01950LA, performs as a GFI for the 

center override pumps, providing 

equivalent or better protection for 

detection and prevention of ground fault 

anomalies. The commenters added that 

the FAA has acknowledged that the UFI 

provides transient fault detection and 

steady state fault detection; and in 

response to any of the above electrical 

faults, the UFI will de-energize the 

airplane electromechanical relay to shut 

off the fuel pump. TDG stated that 

Boeing Model 757 airplanes utilize the 

same fuel pump part number for the 

center tank fuel boost pump application 

as the Boeing Model 737NG airplane. 

TDG Aerospace STC ST01950LA for 

Model 757 airplanes utilizes the same 

UFI part number as STC ST02076LA for 

Model 737NG airplanes that have the 

UFI as an acceptable means of 

compliance through the Manager, 

Seattle Aircraft Certification Office 

(ACO) approval process under Docket 

No. FAA–2010–1199 (AD 2011–20–07, 

Amendment 39–16818 (76 FR 60710, 

September 30, 2011)). TDG Aerospace 

pointed out that a large number of 

Model 757 operators have already 

incorporated STC ST01950LA as a 

means of compliance with FAA AD 

2008–11–07, Amendment 39–15529 (73 

FR 30755, May 29, 2008). 

We partially agree. We have been 

informed that referring to an STC now 

violates Office of the Federal Register 

(OFR) regulations (1 CFR part 51) for 

approval of optional materials 

‘‘incorporated by reference’’ in rules. 

However, we have added paragraph 

(g)(2)(ii) to this AD to specify that 

installation of TDG Aerospace UFIs to 

the center tank override pumps must be 

done in accordance with a method 

approved by the Manager, Seattle ACO, 

FAA. We have also added ‘‘Note 1 to 

paragraph (g)(2)(ii) of this AD’’ to 

specify that additional guidance on 

installing TDG Aerospace UFIs can be 

found in TDG Aerospace STC 

ST01950LA. 

Request To Forego Screw Length 

Inspections and Electrical Bonding 

Checks for Center Override Pumps 

AA requested that we exempt 

airplanes that have the UFI installed for 

the center override pumps from 

performing screw length inspections 

and electrical bonding checks that are 

specific to the GFI installation. The 

commenter stated that the UFI 

installation under STC ST01950LA 

already complies with proper grip 

length. The commenter also stated that 

the UFI STC requires the bonding check 

of the installed UFI bracket to each 

panel. 

We disagree with the commenter’s 

request because the inspection 

requirements of paragraph (h) of the 

final rule clearly identify that the screw 

grip length inspections and GFI bonding 

checks are applicable only to airplanes 

that have Boeing Alert Service Bulletin 

757–28A0078 or 757–28A0079, both 

dated July 16, 2008, accomplished 

before the effective date of the AD. 

Airplanes that have incorporated the 

UFI under STC ST01950LA on their 

center tank override pumps do not need 

to perform these additional inspections 

required by paragraph (h) of this AD. No 

changes have been made to this AD in 

this regard. 

Request To Correct Typographical 

Errors in Service Bulletins 

AA and United Airlines requested 

correction of a number of typographical 

errors in Boeing Service Bulletins 757– 

28A0078 and 757–28A0079, both 

Revision 1, both dated August 24, 2010. 

AA stated that typographical errors in 

Boeing Service Bulletin 757–28A0078, 

Revision 1, dated August 24, 2010, 

mistakenly refer to the P37 panel as 

‘‘P33.’’ In addition, AA and United 

Airlines stated that those service 

bulletins mistakenly refer to the 

standard wiring practices manual rather 

than the standard overhaul practices 

manual (SOPM) for the P33 and P37 

panel identification. 

United Airlines requested that 

paragraph (i) of the SNPRM (76 FR 28, 

January 3, 2011) be corrected to identify 

paragraph 3.B.12.l.(5) of Part 1 of the 

Accomplishment Instructions of Boeing 

Service Bulletin 757–28A0078, Revision 

1, dated August 24, 2010, and not the 

currently referenced paragraph 

3.B.12.i.(5). Boeing Service Bulletin 

Information Notice 757–28A0078 IN 02, 

dated October 6, 2010, identifies 

paragraph 3.B.12.l.(5) as the impacted 

paragraph of the service bulletins. 

We agree that the typographical errors 

needed to be corrected. Boeing has 

released Service Bulletins 757–28A0078 

and 757–28A0079, both Revision 2, both 

dated January 11, 2012, which correct 

typographical errors in the calculations 

in paragraphs 3.B.12.m.(5) and 

3.B.12.m.(6) of Boeing Service Bulletins 

757–28A0078 and 757–28A0079, both 

Revision 1, both dated August 24, 2010. 

These service bulletin revisions also 

clarify certain actions and correct other 

typographical errors. Paragraphs (c), (g), 

and (h) of this AD have been updated 

to refer to Boeing Service Bulletins 757– 

28A0078 and 757–28A0079, both 

Revision 2, both dated January 11, 2012. 

Paragraph (i) of the SNPRM (76 FR 28, 

January 3, 2011) has been removed from 

this final rule. We have also added a 

new paragraph (i) to this AD to allow 

credit for accomplishing Boeing Service 

Bulletin 757–28A0078 or 757–28A0079, 

both Revision 1, both dated August 24, 

2010, before the effective date of this 

AD. 

Request To Allow Identification of P33 

and P37 Panels ‘‘Outside the Scope of 

the AD’’ 

AA recommended that we allow the 

identification of the P33 and P37 panels 

as a statement ‘‘outside the scope of the 

AD.’’ AA stated that the GFI physical 

differences would be enough to 

distinguish between the old and new 

relay types. The commenter also stated 

that post-modification parts are 

illustrated in the revisions to operators’ 

manuals, in the illustrated parts catalog, 

and airplane maintenance manual. The 

commenter pointed out that the lack of 

panel labeling would not affect the level 

of safety. 

We disagree with the commenter’s 

recommendation to change the final rule 

to address this issue. The requirement 

for panel identification specified in Step 

3 in Figure 1 and Figure 2 of Boeing 

Service Bulletins 757–28A0078 and 

757–28A0079, both Revision 1, both 

dated August 24, 2010, refers to 

identifying the P33 and P37 panels to 

show that this change was 

accomplished. Note (a) that 

accompanies the Step 3 instructions in 

those service bulletins calls for marking 

the panels with a unique marking under 

SOPM 20–50–10, which points to the 

incorporation of the changes under the 

accomplishment instructions of those 

service bulletins. It does not call for a 

change to the P33 and P37 panel part 

number. No change has been made to 

the AD in this regard. 

Explanation of Changes to Final Rule 

We have restructured paragraph (g) of 

this AD to clarify the locations for 

replacing the power control relays. 

Paragraph (g)(1) of this AD specifies the 

‘‘main tank fuel boost pumps,’’ and 

paragraph (g)(2) of this AD specifies the 

‘‘center tank override fuel boost 

pumps.’’ 

In addition, we have removed the 

Paperwork Reduction Act Burden 

Statement paragraph since no reporting 

is required in 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— 

and minor editorial changes. We have 

determined that these minor changes: 


rmajette on DSK2TPTVN1PROD with RULES
Federal Register / Vol. 77, No. 66 / Thursday, April 5, 2012 / Rules and Regulations 20507 

• Are consistent with the intent that 

was proposed in the SNPRM (76 FR 28, 

January 3, 2011) for correcting the 

unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the SNPRM (76 FR 28, 

January 3, 2011). 

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 696 

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 

Replacement, measurement, and operational test ......... 7 work-hours × $85 per 

hour = $595.

$12,600 $13,195 Up to $9,183,720.1

Inspection of screw installation and bonding resistance 

measurement.

1 work-hour × $85 per hour 

= $85.

$0 $85 $59,160. 

1The cost for U.S. operators depends on airplane configuration. 

We estimate the following costs to do 

any necessary installation that would be 

required based on the results of the 

proposed inspection. We have no way of 

determining the number of aircraft that 

might need this installation: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per product 

Installation of longer screw ....................................... 1 work-hour × $85 per hour = $85 ........................... $0 $85 

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): 

2012–06–06 The Boeing Company: 

Amendment 39–16987; Docket No. 

FAA–2009–0908; Directorate Identifier 

2009–NM–067–AD. 

(a) Effective Date 

This AD is effective May 10, 2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 757–200, –200PF, –200CB, and –300 

series airplanes, certificated in any category; 

as identified in the applicable service 

bulletin specified in paragraph (c)(1) or (c)(2) 

of this AD. 

(1) For Model 757–200, –200PF, and 

–200CB series airplanes: Boeing Service 

Bulletin 757–28A0078, Revision 2, dated 

January 11, 2012. 

(2) For Model 757–300 series airplanes: 

Boeing Service Bulletin 757–28A0079, 

Revision 2, dated January 11, 2012. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 28, Fuel. 

(e) Unsafe Condition 

This AD was prompted by fuel system 

reviews conducted by the manufacturer. We 

are issuing this AD to prevent damage to the 

fuel pumps caused by electrical arcing that 

could introduce an ignition source in the fuel 

tank, which, in combination with flammable 

fuel vapors, could result in a fuel tank 

explosion and consequent loss of the 

airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Replacement, Measurements, and Test 

For airplanes on which the actions 

specified in Boeing Alert Service Bulletin 

757–28A0078, dated July 16, 2008, or 757– 

28A0079, dated July 16, 2008, have not been 

accomplished before the effective date of this 


rmajette on DSK2TPTVN1PROD with RULES
20508 Federal Register / Vol. 77, No. 66 / Thursday, April 5, 2012 / Rules and Regulations 

AD: Within 60 months after the effective date 

of this AD, do the actions specified in 

paragraphs (g)(1) and (g)(2) of this AD. 

(1) Replace the power control relays for the 

main tank fuel boost pumps with new relays 

having a ground fault interrupter (GFI) 

feature; do applicable electrical bonding 

resistance measurements between the GFI 

relays and their installation panel to verify 

that applicable bonding requirements are 

met; and do an operational test to ensure 

correct operation; as specified in Boeing 

Service Bulletin 757–28A0078, Revision 2, 

dated January 11, 2012 (for Model 757–200, 

–200CB, and –200PF series airplanes); or 

Boeing Service Bulletin 757–28A0079, 

Revision 2, dated January 11, 2012 (for Model 

757–300 series airplanes). Do all actions in 

accordance with Part 1 of the 

Accomplishment Instructions of Boeing 

Service Bulletin 757–28A0078, Revision 2, 

dated January 11, 2012 (for Model 757–200, 

–200CB, and –200PF series airplanes); or 

Boeing Service Bulletin 757–28A0079, 

Revision 2, dated January 11, 2012 (for Model 

757–300 series airplanes). 

(2) Replace the power control relays for the 

center tank override fuel boost pumps with 

new relays having a GFI feature, in 

accordance with the actions required in 

paragraph (g)(2)(i) or (g)(2)(ii) of this AD. 

(i) Replace the power control relays with 

new relays having a GFI feature; do 

applicable electrical bonding resistance 

measurements between the GFI relays and 

their installation panel to verify that 

applicable bonding requirements are met; 

and do an operational test to ensure correct 

operation; as specified in Boeing Service 

Bulletin 757–28A0078, Revision 2, dated 

January 11, 2012 (for Model 757–200, 

–200CB, and –200PF series airplanes); or 

Boeing Service Bulletin 757–28A0079, 

Revision 2, dated January 11, 2012 (for Model 

757–300 series airplanes). Do all actions in 

accordance with Part 1 of the 

Accomplishment Instructions of Boeing 

Service Bulletin 757–28A0078, Revision 2, 

dated January 11, 2012 (for Model 757–200, 

–200CB, and –200PF series airplanes), or 

Boeing Service Bulletin 757–28A0079, 

Revision 2, dated January 11, 2012 (for Model 

757–300 series airplanes). 

(ii) Install and maintain TDG Aerospace 

universal fault interrupters (UFIs), in 

accordance with a method approved by the 

Manager, Seattle Aircraft Certification Office 

(ACO), FAA. 

Note 1 to paragraph (g)(2)(ii) of this AD: 

Guidance on installing TDG Aerospace UFIs 

can be found in Supplemental Type 

Certificate ST01950LA (http://rgl.faa.gov/

Regulatory_and_Guidance_Library/rgSTC.

nsf/0/196ec7e864607b5b862573c5007cb3b5/

$FILE/ST01950LA.pdf). 

(h) Inspection 

For airplanes on which the actions 

specified in Boeing Alert Service Bulletin 

757–28A0078, dated July 16, 2008, or 757– 

28A0079, dated July 16, 2008, have been 

accomplished before the effective date of this 

AD: Within 60 months after the effective date 

of this AD, do a general visual inspection to 

verify that each GFI installation screw has 

enough grip length to hold the screws in each 

nut plate, and do applicable electrical 

bonding resistance measurements between 

the GFI relays and their installation panel to 

verify that applicable bonding requirements 

are met. If the screw does not have enough 

grip length, before further flight, install a 

longer screw. Do all actions in accordance 

with Part 2 of the Accomplishment 

Instructions of Boeing Service Bulletin 757– 

28A0078, Revision 2, dated January 11, 2012 

(for Model 757–200, –200CB, and –200PF 

series airplanes); or Boeing Service Bulletin 

757–28A0079, Revision 2, dated January 11, 

2012 (for Model 757–300 series airplanes). 

(i) Credit for Previous Actions 

This paragraph provides credit for the 

actions required by this AD, if those actions 

were performed before the effective date of 

this AD using Boeing Service Bulletin 757– 

28A0078 or 757–28A0079, both Revision 1, 

both dated August 24, 2010. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle 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. 

(k) Related Information 

For more information about this AD, 

contact Georgios Roussos, Aerospace 

Engineer, Systems and Equipment Branch, 

ANM–130S, Seattle ACO, FAA, 1601 Lind 

Avenue SW., Renton, Washington 98057– 

3356; phone: (425) 917–6482; fax: (425) 917– 

6590; email: Georgios.Roussos@faa.gov. Or, 

email information to 9-ANM-Seattle-ACOAMOC-Requests@faa.gov. 

(l) Material Incorporated by Reference 

(1) You must use the following service 

information to do the actions required by this 

AD, unless the AD specifies otherwise. The 

Director of the Federal Register approved the 

incorporation by reference (IBR) under 5 

U.S.C. 552(a) and 1 CFR part 51 of the 

following service information: 

(i) Boeing Service Bulletin 757–28A0078, 

Revision 2, dated January 11, 2012. 

(ii) Boeing Service Bulletin 757–28A0079, 

Revision 2, dated January 11, 2012. 

(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; email me.boecom@boeing.com; 

Internet https://www.myboeingfleet.com. 

(3) You may review copies of the 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. 

(4) You may also review copies of the 

service information that is incorporated by 

reference at the National Archives and 

Records Administration (NARA). For 

information on the availability of this 

material at an NARA facility, call 202–741– 

6030, or go to http://www.archives.gov/

federal_register/code_of_federal_regulations/

ibr_locations.html. 

Issued in Renton, Washington, on March 9, 

2012. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–6642 Filed 4–4–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0821; Directorate 

Identifier 2010–NE–30–AD; Amendment 39– 

17004; AD 2012–06–23] 

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 

875–17, RB211–Trent 877–17, RB211– 

Trent 884–17, RB211–Trent 884B–17, 

RB211–Trent 892–17, RB211–Trent 

892B–17, and RB211–Trent 895–17 

turbofan engines. That AD currently 

requires initial and repetitive ultrasonic 

inspections (UIs) of certain low-pressure 

(LP) compressor blades identified by 

serial number (S/N). This AD requires 

the same actions but expands the 

population of blades. This AD was 

prompted by RR concluding that 

additional blades affected must be 

inspected. We are issuing this AD to 

prevent LP compressor blades from 

failing due to blade root cracks, which 

could lead to uncontained engine failure 

and damage to the airplane. 

DATES: This AD is effective April 20, 

2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of April 20, 2012. 

We must receive any comments on 

this AD by May 21, 2012. 

ADDRESSES: You may send comments by 

any of the following methods: 


rmajette on DSK2TPTVN1PROD with RULES