31330 Federal Register / Vol. 75, No. 106 / Thursday, June 3, 2010 / Proposed Rules 

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 proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would 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 proposed regulation: 

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. 

You can find our regulatory 

evaluation and the estimated costs of 

compliance in the AD Docket. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 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: 

The Boeing Company: Docket No. FAA– 

2010–0483; Directorate Identifier 2010– 

NM–065–AD. 

Comments Due Date 

(a) We must receive comments by July 19, 

2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to all The Boeing 

Company Model 757–200, –200PF, –200CB, 

and –300 series airplanes, certificated in any 

category. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 57: Wings. 

Unsafe Condition 

(e) This AD results from reports of Model 

757 airplanes in service that have drain holes 

and unsealed panel assemblies in the fixed 

leading edge adjacent to the inboard end of 

slats 4 and 7 that are too close to the hot 

portion of the engines. The Federal Aviation 

Administration is issuing this AD to prevent 

fuel leaking onto an engine and a consequent 

fire. 

Compliance 

(f) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Action 

(g) Within 60 months after the effective 

date of this AD, change the lower fixed 

leading edge panel assemblies immediately 

outboard of the nacelles at slats 4 and 7, in 

accordance with the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 757–57–0070, dated January 

27, 2010. 

Alternative Methods of Compliance 

(AMOCs) 

(h)(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. Send information to Attn: Tak 

Kobayashi, Aerospace Engineer, Propulsion 

Branch, ANM–140S, FAA, Seattle Aircraft 

Certification Office, 1601 Lind Avenue, SW., 

Renton, Washington 98057–3356; telephone 

(425) 917–6499; fax (425) 917–6590. 

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

(2) To request a different method of 

compliance or a different compliance time 

for this AD, follow the procedures in 14 CFR 

39.19. Before using any approved AMOC on 

any airplane to which the AMOC applies, 

notify your principal maintenance inspector 

(PMI) or principal avionics inspector (PAI), 

as appropriate, or lacking a principal 

inspector, your local Flight Standards District 

Office. The AMOC approval letter must 

specifically reference this AD. 

Issued in Renton, Washington, on May 25, 

2010. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–13307 Filed 6–2–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0384; Directorate 

Identifier 2010–NE–18–AD] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney PW4000 Series Turbofan 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

Pratt & Whitney PW4000 series turbofan 

engines. This proposed AD would 

require a one-time visual inspection of 

the No. 3 bearing oil pressure tube, part 

number (P/N) 51J041–01, P/N 50J604– 

01, or P/N 50J924–01. Tubes that are 

found cracked or repaired would be 

required to be removed from service. 

This proposed AD would also prohibit 

repaired tubes from being installed. This 

proposed AD results from one report of 

a repaired No. 3 bearing oil tube that 

caused an engine in-flight shutdown, 

seven reports of repaired No. 3 bearing 

oil pressure tubes found cracked that 

led to unscheduled engine removals, 

and one report of a test cell event from 

a repaired tube that cracked. We are 

proposing this AD to prevent cracking of 

No. 3 bearing oil pressure tubes which 

could result in internal oil fire, failure 

of the high-pressure turbine (HPT) 

disks, uncontained engine failure, and 

damage to the airplane. 

DATES: We must receive any comments 

on this proposed AD by August 2, 2010. 

ADDRESSES: Use one of the following 

addresses to comment on this proposed 

AD. 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov and follow 

the instructions for sending your 

comments electronically. 

• Mail: Docket Management Facility, 

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 FURTHER INFORMATION CONTACT: 

James Gray, Aerospace Engineer, Engine 

Certification Office, FAA, Engine and 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 


srobinson on DSKHWCL6B1PROD with PROPOSALS
Federal Register / Vol. 75, No. 106 / Thursday, June 3, 2010 / Proposed Rules 31331 

e-mail: james.gray@faa.gov; telephone 

(781) 238–7742; fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send us any written 

relevant data, views, or arguments 

regarding this proposal. Send your 

comments to an address listed under 

ADDRESSES. Include ‘‘Docket No. FAA– 

2010–0384; Directorate Identifier 2010– 

NE–18–AD’’ in the subject line of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of the proposed AD. We will 

consider all comments received by the 

closing date and may amend the 

proposed AD in light 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 proposed 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). 

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 proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (telephone (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. 

Discussion 

In August 2009, we received a report 

of a Pratt & Whitney PW4000 series 

turbofan engine failure during flight. 

Investigation revealed that the engine 

had an internal oil fire caused by a 

cracked No. 3 bearing oil pressure tube, 

and that the tube was previously weldrepaired. That fire led to failure of the 

high-pressure compressor rear shaft and 

damage to the HPT stages 1–2 air seal 

and HPT disks. Since 2007, we have 

also received seven other reports of 

repaired No. 3 bearing oil pressure tubes 

cracking, resulting in unscheduled 

engine removals. The operational 

interaction of the tube and diffuser case 

can cause wear. A weld-repaired tube 

can exhibit decreased capability and be 

more likely to crack than a tube that has 

not been repaired. Because of the type 

of environment these tubes operate in, 

tubes that are cracked or repaired, or if 

suspected that the tube was repaired, 

would be required to be removed from 

service. Operating the engines with 

cracked No. 3 bearing oil pressure tubes, 

if not corrected, could result in internal 

oil fire, failure of the HPT disks, 

uncontained engine failure, and damage 

to the airplane. 

FAA’s Determination and Requirements 

of the Proposed AD 

We have evaluated all pertinent 

information and identified an unsafe 

condition that is likely to exist or 

develop on other products of this same 

type design. We are proposing this AD, 

which would require: 

• A one-time visual inspection of the 

No. 3 bearing oil pressure tube, P/N 

51J041–01, P/N 50J604–01, or P/N 

50J924–01; and 

• Removal from service if found 

cracked or repaired, or if suspected that 

the tube was repaired; and 

• A prohibition on installing repaired 

tubes. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 973 PW4000 series 

turbofan engines installed on airplanes 

of U.S. registry. We also estimate that it 

would take about 10 minutes per engine 

to perform the proposed one-time visual 

inspection when the tube has been 

removed, and that the average labor rate 

is $85 per work-hour. Required parts 

would cost about $9,154 per engine. 

Based on these figures, we estimate the 

total cost of the proposed AD to U.S. 

operators to be $8,923,383. 

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 have determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would 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 the proposed 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. Would 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 proposed AD. You may get a copy 

of this summary at the address listed 

under ADDRESSES. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Safety. 

The Proposed Amendment 

Under the authority delegated to me 

by the Administrator, the Federal 

Aviation Administration proposes to 

amend 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: 

Pratt & Whitney: Docket No. FAA–2010– 

0384; Directorate Identifier 2010–NE– 

18–AD. 

Comments Due Date 

(a) The Federal Aviation Administration 

(FAA) must receive comments on this 

airworthiness directive (AD) action by 

August 2, 2010. 

Affected ADs 

(b) None. 


srobinson on DSKHWCL6B1PROD with PROPOSALS
31332 Federal Register / Vol. 75, No. 106 / Thursday, June 3, 2010 / Proposed Rules 

Applicability 

(c) This AD applies to the following Pratt 

& Whitney turbofan engines, with No. 3 

bearing oil pressure tube, part number (P/N) 

51J041–01, P/N 50J604–01, or P/N 50J924– 

01, installed: 

PW4000–94′′ Engines 

(1) PW4000–94′′ engines affected are 

PW4050, PW4052, PW4056, PW4060, 

PW4060A, PW4060C, PW4062, PW4062A, 

PW4152, PW4156, PW4156A, PW4158, 

PW4160, PW4460, PW4462, and PW4650, 

including models with any dash number 

suffix. 

PW4000–100′′ Engines 

(2) PW4000–100′′ engines affected are 

PW4164, PW4168, PW4168A, PW4164C, 

PW4164C/B, PW4170, PW4168A–1D, 

PW4168–1D, PW4164–1D, PW4164C–1D, 

and PW4164C/B–1D, including models with 

any dash number suffix. 

PW4000–112′′ Engines 

(3) PW4000–112′′ engines affected are 

PW4074, PW4074D, PW4077, PW4077D, 

PW4084, PW4084D, PW4090, PW4090–3, 

PW4090D, and PW4098, including models 

with any dash number suffix. 

(4) These engines are installed on, but not 

limited to, Airbus A300, A310, and A330 

series, Boeing MD–11, 747, 767, and 777 

series, airplanes. 

Unsafe Condition 

(d) This AD results from one report of a 

repaired No. 3 bearing oil pressure tube that 

cracked and caused an engine in-flight 

shutdown, one report of a test cell event, and 

eight reports since 2007, of repaired No. 3 

bearing oil pressure tubes found cracked that 

led to unscheduled engine removals. We are 

issuing this AD to prevent cracking of No. 3 

bearing oil pressure tubes which could result 

in internal oil fire, failure of the highpressure turbine disks, uncontained engine 

failure, and damage to the airplane. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed the 

next time the No. 3 bearing oil pressure tube 

is removed from the engine after the effective 

date of this AD, unless the actions have 

already been done. 

One-Time Visual Inspection of the No. 3 

Bearing Oil Pressure Tube 

(f) Perform a one-time visual inspection of 

the exterior of the No. 3 bearing oil pressure 

tube for cracks and evidence of being 

repaired. 

(1) Remove the tube from service if any 

cracks are found. 

(2) Remove the tube from service if found 

repaired, or if suspected that the tube was 

repaired. 

(g) After the effective date of this AD, do 

not install any repaired No. 3 bearing oil 

pressure tube into any engine. 

(h) Guidance on the No. 3 bearing oil 

pressure tube visual inspection can be found 

in: 

(1) Pratt & Whitney Clean, Inspect, Repair 

Manual PN 51A357, 72–41–20 for PW4000– 

94′′ and PW4000–100′′ series engines; or 

(2) Pratt & Whitney Clean, Inspect, Repair 

Manual PN 51A750, 72–41–20 for PW4000– 

112′′ series engines. 

Alternative Methods of Compliance 

(i) The Manager, Engine Certification 

Office, has the authority to approve 

alternative methods of compliance for this 

AD, if requested using the procedures found 

in 14 CFR 39.19. 

Related Information 

(j) Contact James Gray, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; e-mail: james.gray@faa.gov; telephone 

(781) 238–7742; fax (781) 238–7199, for more 

information about this AD. 

(k) Contact Pratt & Whitney, 400 Main St., 

East Hartford, CT 06108, telephone (860) 

565–7700; fax (860) 565–1605, for a copy of 

the repair manuals referenced in paragraphs 

(h)(1) and (h)(2) of this AD. 

Issued in Burlington, Massachusetts, on 

May 27, 2010. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–13314 Filed 6–2–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0546; Directorate 

Identifier 2009–NM–215–AD] 

RIN 2120–AA64 

Airworthiness Directives; Empresa 

Brasileira de Aeronautica S.A. 

(EMBRAER) Model EMB–120, –120ER, 

–120FC, –120QC, and –120RT 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for the 

products listed above. This proposed 

AD results from mandatory continuing 

airworthiness information (MCAI) 

originated by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: It has been found that 

some fuel quantity probes may fail 

during the airplane life leading to an 

erroneous fuel quantity indication to the 

crew. This erroneous indication may 

lead to the airplane being operated with 

less fuel than indicated which may lead 

to an uncommanded in-flight shutdown 

of one or both engines due to fuel 

starvation. The proposed AD would 

require actions that are intended to 

address the unsafe condition described 

in the MCAI. 

DATES: We must receive comments on 

this proposed AD by July 19, 2010. 

ADDRESSES: You may send comments 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 

W12–40, 1200 New Jersey Avenue, SE., 

Washington, DC, between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Empresa 

Brasileira de Aeronautica S.A. 

(EMBRAER), Technical Publications 

Section (PC 060), Av. Brigadeiro Faria 

Lima, 2170—Putim—12227–901 Sa ̃o 

Jose dos Campos—SP—BRASIL; 

telephone: +55 12 3927–5852 or +55 12 

3309–0732; fax: +55 12 3927–7546; email: distrib@embraer.com.br; Internet: 

http://www.flyembraer.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 Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (telephone (800) 647–5527) is in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Todd Thompson, Aerospace Engineer, 

International Branch, ANM–116, 

Transport Airplane Directorate, FAA, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 227–1175; fax (425) 227–1149. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 


srobinson on DSKHWCL6B1PROD with PROPOSALS