Federal Register / Vol. 75, No. 141 / Friday, July 23, 2010 / Proposed Rules 43097 

Other FAA AD Provisions 

(g) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, Standards Office, 

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: Sarjapur Nagarajan, Aerospace 

Engineer, FAA, Small Airplane Directorate, 

901 Locust, Room 301, Kansas City, Missouri 

64106; telephone: (816) 329–4145; fax: (816) 

329–4090. Before using any approved AMOC 

on any airplane to which the AMOC applies, 

notify your appropriate principal inspector 

(PI) in the FAA Flight Standards District 

Office (FSDO), or lacking a PI, your local 

FSDO. 

(2) Airworthy Product: For any requirement 

in this AD to obtain corrective actions from 

a manufacturer or other source, use these 

actions if they are FAA-approved. Corrective 

actions are considered FAA-approved if they 

are approved by the State of Design Authority 

(or their delegated agent). You are required 

to assure the product is airworthy before it 

is returned to service. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act 

(44 U.S.C. 3501 et seq.), the Office of 

Management and Budget (OMB) has 

approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(h) Refer to MCAI European Aviation 

Safety Agency (EASA) AD No.: 2010–0123, 

dated June 22, 2010; and PIAGGIO AERO 

INDUSTRIES S.p.A. Service Bulletin 

(Mandatory) N.: 80–0287, Rev. N. 1, dated 

March 24, 2010, for related information. 

Issued in Kansas City, Missouri, on July 16, 

2010. 

Kim Smith, 

Manager, Small Airplane Directorate, Aircraft 

Certification Service. 

[FR Doc. 2010–18061 Filed 7–22–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0698; Directorate 

Identifier 2009–NM–264–AD] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Model 757 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede an existing airworthiness 

directive (AD) that applies to all Model 

757 airplanes. The existing AD currently 

requires sealing the fasteners on the 

front and rear spars inside the left and 

right main fuel tanks and on the rear 

spar and lower panel of the center fuel 

tank. That AD also requires inspections 

of the wire bundle support installations 

to verify if certain clamps are installed 

and if Teflon sleeving covers the wire 

bundles inside the left and right 

equipment cooling system bays, on the 

left and right rear spars, and on the left 

and right front spars; and corrective 

actions if necessary. This proposed AD 

would also require sealing the 

additional fasteners on the rear spar 

inside the left and right main fuel tanks. 

This proposed AD results from a fuel 

system review conducted by the 

manufacturer. We have received reports 

from the manufacturer that additional 

fasteners in the main fuel tanks must be 

sealed for lightning strike protection. 

We are proposing this AD to detect and 

correct improper wire bundle support 

installation and sleeving and to prevent 

improperly sealed fasteners in the main 

and center fuel tanks from becoming an 

ignition source, in the event of a fault 

current or lightning strike, which could 

result in a fuel tank explosion and 

consequent loss of the airplane. 

DATES: We must receive comments on 

this proposed AD by September 7, 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 W12–140, 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 proposed 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; e-mail 

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 proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket 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: 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. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2010–0698; Directorate Identifier 

2009–NM–264–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD because 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 we receive 

about this proposed AD. 

Discussion 

On October 24, 2008, we issued AD 

2008–23–19, Amendment 39–15740 (73 

FR 71534, November 25, 2008), for all 

Model 757 series airplanes. That AD 

requires sealing the fasteners on the 

front and rear spars inside the left and 

right main fuel tanks and on the rear 

spar and lower panel of the center fuel 

tank. That AD also requires inspections 

of the wire bundle support installations 

to verify if certain clamps are installed 

and if Teflon sleeving covers the wire 

bundles inside the left and right 

equipment cooling system bays, on the 

left and right rear spars, and on the left 

and right front spars; and corrective 

actions if necessary. That AD resulted 

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43098 Federal Register / Vol. 75, No. 141 / Friday, July 23, 2010 / Proposed Rules 

from a fuel system review conducted by 

the manufacturer. We issued that AD to 

detect and correct improper wire bundle 

support installation and sleeving and to 

prevent improperly sealed fasteners in 

the main and center fuel tanks from 

becoming an ignition source, in the 

event of a fault current, which could 

result in a fuel tank explosion and 

consequent loss of the airplane. 

Clarification of Applicability 

The applicability of AD 2008–23–19 

refers to Model 757–200, –200CB, 

–200PF, and –300 series airplanes, as 

identified in Boeing Alert Service 

Bulletin 757–57A0064, dated July 16, 

2007. Since that service bulletin affects 

all Model 757 airplanes, we have 

revised paragraph (c) of this AD to 

include all Model 757 airplanes. 

Actions Since Existing AD Was Issued 

Since we issued AD 2008–23–19, we 

have received reports that it is possible 

for some fuel tank fasteners, in the event 

of a lightning strike, to become an 

ignition source. Additional fasteners in 

the main fuel tanks must be sealed for 

lightning strike protection. 

Relevant Service Information 

AD 2008–23–19 referred to Boeing 

Alert Service Bulletin 757–57A0064, 

dated July 16, 2007, as the appropriate 

source of service information for the 

required actions. Boeing has since 

revised the service bulletin. Boeing 

Alert Service Bulletin 757–57A0064, 

Revision 1, dated October 5, 2009, 

identifies additional fasteners on the 

rear spar inside the left and right main 

fuel tanks that must be sealed. 

FAA’s Determination and Requirements 

of the Proposed AD 

We have evaluated all pertinent 

information and identified an unsafe 

condition that is likely to develop on 

other airplanes of the same type design. 

For this reason, we are proposing this 

AD, which would supersede AD 2008– 

23–19 and would retain the 

requirements of the existing AD. This 

proposed AD would require 

accomplishing the actions specified in 

the Relevant Service Information 

described previously. 

Change to Existing AD 

This proposed AD would retain all 

requirements of AD 2008–23–19. Since 

AD 2008–23–19 was issued, the AD 

format has been revised, and certain 

paragraphs have been rearranged. As a 

result, the corresponding paragraph 

identifiers have changed in this 

proposed AD, as listed in the following 

table: 

REVISED PARAGRAPH IDENTIFIERS

Requirement in AD 

2008–23–19 

Corresponding 

requirement in this 

proposed AD 

paragraph (d) paragraph (e) 

paragraph (e) paragraph (f) 

paragraph (f) paragraph (g) 

Costs of Compliance 

There are about 1,036 airplanes of the 

affected design in the worldwide fleet. 

The following table provides the 

estimated costs for U.S. operators to 

comply with this proposed AD. 

ESTIMATED COSTS

Action Work hours Average labor 

rate per hour Parts Cost per airplane 

Number of 

U.S.-registered 

airplanes 

Fleet cost 

Fastener Sealing and Inspections (required by AD 

2008-23-19).

Up to 545 hours per airplane depending on airplane configuration.$85 $325 $46,650 667 $31,115,550 

Main Tank Fastener Sealing 

(new proposed action).

30 ....................................... 85 0 2,550 667 1,700,850 

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 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. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this proposed AD and placed it in the 

AD docket. See the ADDRESSES section 

for a location to examine the regulatory 

evaluation. 

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 

removing Amendment 39–15740 (73 FR 

71534, November 25, 2008), and adding 

the following new AD: 

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Federal Register / Vol. 75, No. 141 / Friday, July 23, 2010 / Proposed Rules 43099 

The Boeing Company: Docket No. FAA– 

2010–0698; Directorate Identifier 2009– 

NM–264–AD. 

Comments Due Date 

(a) The FAA must receive comments on 

this AD action by September 7, 2010. 

Affected ADs 

(b) This AD supersedes AD 2008–23–19, 

Amendment 39–15740. 

Applicability 

(c) This AD applies to all The Boeing 

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

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 a fuel system 

review conducted by the manufacturer. We 

have received reports from the manufacturer 

that additional fasteners in the main fuel 

tanks must be sealed for lightning strike 

protection. The Federal Aviation 

Administration is issuing this AD to detect 

and correct improper wire bundle support 

installation and sleeving and to prevent 

improperly sealed fasteners in the main and 

center fuel tanks from becoming an ignition 

source, in the event of a fault current or 

lightning strike, which could result in a fuel 

tank explosion and consequent loss of the 

airplane. 

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. 

Restatement of Requirements of AD 2008– 

23–19, With Revised Service Information 

Fastener Sealing and Inspections 

(g) Within 60 months after December 30, 

2008 (the effective date of AD 2008–23–19), 

seal the applicable fasteners and do the 

general visual inspections of the wire bundle 

support installations, and do all the 

applicable corrective actions before further 

flight, by accomplishing all of the applicable 

actions specified in the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

757–57A0064, dated July 16, 2007; or Part 1 

through Part 10 of the Work Instructions of 

Boeing Alert Service Bulletin 757–57A0064, 

Revision 1, dated October 5, 2009. 

New Requirements of This AD 

Fastener Sealing on the Rear Spar 

(h) For airplanes on which Boeing Alert 

Service Bulletin 757–57A0064, dated July 16, 

2007, was done: Within 60 months after 

December 30, 2008 (the effective date of AD 

2008–23–19), seal the fasteners on the rear 

spar inside the left and right main fuel tanks, 

in accordance with Part 11 of the Work 

Instructions of Boeing Alert Service Bulletin 

757–57A0064, Revision 1, dated October 5, 

2009. 

Alternative Methods of Compliance 

(AMOCs) 

(i)(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. 

(3) AMOCs approved previously in 

accordance with AD 2008–23–19, 

Amendment 39–15740, are approved as 

AMOCs for the corresponding provisions of 

paragraph (g) of this AD. 

Issued in Renton, Washington, on July 15, 

2010. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–18017 Filed 7–22–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0732; Directorate 

Identifier 2010–NE–04–AD] 

RIN 2120–AA64 

Airworthiness Directives; General 

Electric Company (GE) CT7–9C and 

–9C3 Turboprop 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 GE 

CT7–9C and –9C3 turboprop engines 

with certain serial number (S/N) gas 

generator turbine (GGT) shafts, part 

number (P/N) 6068T44P02, installed. 

This proposed AD would require 

inspecting the GGT shaft for 

nonconforming land balance-cuts, and if 

found, removing the shaft from service. 

This proposed AD results from reports 

of a manufacturing quality problem. We 

are proposing this AD to detect 

nonconforming GGT shaft land balancecuts, which could result in the shaft 

failing before its published life limit, 

and which could result in an 

uncontained engine failure and damage 

to the airplane. 

DATES: We must receive any comments 

on this proposed AD by September 21, 

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. 

Contact General Electric Company, 

GE–Aviation, Room 285, 1 Newmann 

Way, Cincinnati, Ohio 45215; e-mail 

geae.aoc@ge.com; telephone (513) 552– 

3272; fax (513) 552–3329, for a copy of 

the service information identified in this 

proposed AD. 

FOR FURTHER INFORMATION CONTACT: 

Barbara Caufield, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: barbara.caufield@faa.gov; 

telephone (781) 238–7146; 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– 

2010–0732; Directorate Identifier 2010– 

NE–04–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, 

WReier-Aviles on DSKGBLS3C1PROD with PROPOSALS