This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

13045 

Vol. 75, No. 52 

Thursday, March 18, 2010 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0026; Directorate 

Identifier 2010–NE–03–AD] 

RIN 2120–AA64 

Airworthiness Directives; CFM 

International, S.A. CFM56–5, –5B, and 

–7B 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 

CFM International, S.A. CFM56–5, –5B, 

and –7B series turbofan engines. This 

proposed AD would require removing 

from service, nine stage 3 low-pressure 

turbine (LPT) disks, identified by serial 

number (S/N). This proposed AD results 

from the discovery of a material 

nonconformity requiring removal of the 

disk before the certified disk life of 

certain stage 3 LPT disks. We are 

proposing this AD to prevent 

uncontained failure of the stage 3 LPT 

disk and damage to the airplane. 

DATES: We must receive any comments 

on this proposed AD by May 17, 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: 

Antonio Cancelliere, Aerospace 

Engineer, Engine Certification Office, 

FAA, Engine & Propeller Directorate, 12 

New England Executive Park, 

Burlington, MA 01803; e-mail: 

antonio.cancelliere@faa.gov; telephone 

(781) 238–7751; 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– 

2010–0026; Directorate Identifier 2010– 

NE–03–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 February 2009, we were made 

aware by CFM International, S.A. of 

stage 3 LPT disks, part number (P/N) 

336–002–006–0, S/Ns DE255844, 

DE256388, DE256622, DE256623, 

DE256625, DE256627, DE256628, 

DE256631, and DE256637, being suspect 

of material non-conformity. This batch 

of parts was subject to a quality problem 

during manufacturing. CFM 

International, S.A. states that the 

manufacturing process has since been 

revised to eliminate the quality 

problem. The non-conformity requires 

removal from service of the suspect 

disks before their certified life limits. 

Operating engines with these affected 

disks to the certified life limit could 

result in uncontained failure of the stage 

3 LPT disk 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. This proposed AD would 

require removing from service any 

affected stage 3 LPT disks from engines 

before their certified life limit. We are 

proposing this AD, which would require 

removing the affected stage 3 LPT disks 

from service before accumulating 9,500 

cycles-since-new. 

Costs of Compliance 

We estimate that this proposed AD 

would affect two engines installed on 

airplanes of U.S. registry. The pro-rated 

cost of the replacement parts is $40,375 

per engine. We estimate that no 

additional labor costs would be incurred 

to perform the required disk removals, 

because the removals would be done at 

time of engine shop visit. Based on 

these figures, we estimate the total cost 

of the proposed AD to U.S. operators to 

be $80,750. 

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 


pwalker on DSK8KYBLC1PROD with PROPOSALS
13046 Federal Register / Vol. 75, No. 52 / Thursday, March 18, 2010 / Proposed Rules 

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: 

CFM International, S.A.: Docket No. FAA– 

2010–0026; Directorate Identifier 2010– 

NE–03–AD. 

Comments Due Date 

(a) The Federal Aviation Administration 

(FAA) must receive comments on this 

airworthiness directive (AD) action by May 

17, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to CFM International 

CFM56–5, –5B, and –7B series turbofan 

engines with stage 3 low-pressure turbine 

(LPT) disks installed with the following 

serial numbers, (S/Ns) DE255844, DE256388, 

DE256622, DE256623, DE256625, DE256627, 

DE256628, DE256631, and DE256637. The –5 

and –5B series engines are installed on, but 

not limited to, Airbus A318, A319, A320, 

A321, and A340 airplanes, and the –7B series 

engines are installed on, but not limited to, 

Boeing 737 series airplanes. 

Unsafe Condition 

(d) This AD results from the discovery of 

a material nonconformity requiring removal 

of the disk before the certified disk life of 

certain stage 3 LPT disks. We are issuing this 

AD to prevent uncontained failure of the 

stage 3 LPT disk and damage to the airplane. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed within 

the compliance time specified unless the 

actions have already been done. 

Removal of Affected Stage 3 LPT Disks From 

Service 

(f) Before accumulating 9,500 cycles-sincenew, remove stage 3 LPT disks from service. 

(g) After the effective date of this AD do 

not reinstall any stage 3 LPT disk removed 

from service per paragraph (f) of this AD into 

any engine. 

Alternative Methods of Compliance 

(h) 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 

(i) Contact Antonio Cancelliere, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; e-mail: antonio.cancelliere@faa.gov; 

telephone (781) 238–7751; fax (781) 238– 

7199, for more information about this AD. 

(j) CFM International, S.A. Service Bulletin 

(SB) No. CFM56–5B S/B 72–0733, dated 

October 26, 2009, and SB No. CFM56–7B 

S/B 72–0743, dated October 26, 2009, pertain 

to the subject of this AD. Contact CFM 

International, Technical Publications 

Department, 1 Neumann Way, Cincinnati, 

OH 45215; telephone (513) 552–2800; fax 

(513) 552–2816, for a copy of this service 

information. 

Issued in Burlington, Massachusetts, on 

March 11, 2010. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–5861 Filed 3–17–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0232; Directorate 

Identifier 2009–NM–032–AD] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Model 747–200C, –200F, 

–400, –400D, and –400F Series 

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 certain 

Model 747–200C, –200F, –400, –400D, 

and –400F series airplanes. The existing 

AD currently requires repetitive 

inspections for cracks in the 

overlapping (upper) skin, upper fastener 

row of the lap joints of the fuselage skin 

in sections 41, 42, and 46; and related 

investigative and corrective actions, if 

necessary. This proposed AD would 

expand the inspection area in the 

existing AD, and add a modification of 

certain lap joints and certain post-repair 

inspections of the lap joints. 

Accomplishing the modification would 

end the repetitive inspections required 

by the existing AD for the length of lap 

joint that is modified. This proposed AD 

results from a structural review of 

affected skin lap joints for widespread 

fatigue damage. We are proposing this 

AD to prevent fatigue cracking in certain 

lap joints, which could result in rapid 

depressurization of the airplane. 

DATES: We must receive comments on 

this proposed AD by May 3, 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 


pwalker on DSK8KYBLC1PROD with PROPOSALS