Federal Register / Vol. 74, No. 73 / Friday, April 17, 2009 / Proposed Rules 17799 

Issued in Burlington, Massachusetts, on 

April 9, 2009. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. E9–8786 Filed 4–16–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2007–27687; Directorate 

Identifier 2000–NE–42–AD] 

RIN 2120–AA64 

Airworthiness Directives; General 

Electric Company CF34–1A, –3A, –3A1, 

–3A2, –3B, and –3B1 Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Supplemental Notice of 

proposed rulemaking (NPRM); 

reopening of comment period. 

SUMMARY: This notice revises an earlier 

proposed airworthiness directive (AD), 

and supersedes an existing AD 

applicable to General Electric Company 

(GE) CF34–1A, –3A, –3A1, –3A2, –3B, 

and –3B1 turbofan engines. This 

proposed AD reopens the comment 

period, since we added additional 

requirements based on responses we 

received. This proposed AD would now 

require: 

• Inspecting certain fan disks for 

electrical arc-out indications, 

• Removing from service fan disks 

with electrical arc-out indications, 

• Performing tactile and enhanced 

visual (TEV) inspections, fluorescent 

penetrant inspections (FPI), and eddy 

current inspections (ECI) on certain 

disks that have already had a shop-level 

inspection, and 

• Repetitive FPI and ECI on certain 

fan disks. 

This proposed AD results from an 

updated risk analysis by GE that shows 

we need to take corrective action that is 

more stringent. We are proposing this 

AD to prevent an uncontained failure of 

the fan disk, which could result in 

damage to the airplane. 

DATES: We must receive any comments 

on this proposed AD by June 16, 2009. 

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 via 

Lockheed Martin Technology Services, 

10525 Chester Road, Suite C, Cincinnati, 

Ohio 45215; telephone (513) 672–8400; 

fax (513) 672–8422, for the service 

information identified in this proposed 

AD. 

FOR FURTHER INFORMATION CONTACT: Tara 

Chaidez, Aerospace Engineer, Engine 

Certification Office, FAA, Engine and 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: tara.chaidez@faa.gov; telephone 

(781) 238–7773; 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– 

2007–27687; Directorate Identifier 

2000–NE–42–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 

We proposed to amend 14 CFR part 

39 by superseding AD 2007–07–07R1, 

Amendment 39–15179 (72 FR 49183, 

August 28, 2007). That AD requires a 

onetime inspection of certain fan disks 

for electrical arc-out indications, 

replacing fan disks with electrical arcout indications, and reducing the life 

limit of certain fan disks. That NPRM 

was prompted by us determining that 

we inadvertently left out an inspection 

requirement in Table C of AD 2007–07– 

07R1 to perform a shop inspection on 

disks that have greater than 6,000 flight 

hours and have already undergone a 

shop inspection. That condition, if not 

corrected, could result in an 

uncontained fan disk failure and 

airplane damage. On January 18, 2008, 

we published that proposal as an NPRM 

in the Federal Register (73 FR 3425). 

That NPRM would have required: 

• Replacing certain fan disks installed 

on regional jets within 15 days after the 

effective date of the proposed AD, and 

• On-wing and shop-level inspections 

of fan disks for electrical arc-out defects 

on fan disks installed on regional jets, 

and 

• Shop-level inspections of fan disks 

for electrical arc-out defects on fan disks 

installed on business jets. 

Since we issued that NPRM, GE 

performed an updated risk analysis that 

shows we need to take corrective action 

that is more stringent than that 

proposed in the NPRM. We also propose 

to amend 14 CFR part 39 by superseding 

AD 2007–05–16, Amendment 39–14977 

(72 FR 10054, March 7, 2007). That AD 

requires a onetime visual and tactile 

inspection of certain areas of certain 

P/N and SN fan disks for an arc-out 

defect, within 20 engine flight hours 

after the effective date of that AD. Since 

we issued that AD, GE has added those 

SN fan disks to the applicable service 

bulletins for the repetitive inspection 

requirements of this proposed AD. 

Since these changes expand the scope 

of the originally proposed rule, we have 

determined that it is necessary to reopen 

the comment period to provide 

additional opportunity for public 

comment. This condition, if not 

corrected, could result in an 

uncontained failure of the fan disk and 

damage to the airplane. 


dwashington3 on PROD1PC60 with PROPOSALS
17800 Federal Register / Vol. 74, No. 73 / Friday, April 17, 2009 / Proposed Rules 

Relevant Service Information 

We have reviewed and approved the 

technical contents of GE Alert Service 

Bulletins (ASBs) No. CF34–BJ S/B 72– 

A0212, Revision 04, dated October 27, 

2008; CF34–BJ S/B 72–A0234, dated 

October 27, 2008; CF34–BJ S/B 72– 

A0235, dated October 27, 2008; CF34– 

AL S/B 72–A0233, Revision 04, dated 

October 27, 2008; CF34–AL S/B 72– 

A0252, dated October 27, 2008; and 

CF34–AL S/B 72–A0253, dated October 

27, 2008. These ASBs list the affected 

fan disks by serial number, part number, 

and tier, and describe procedures for 

performing TEV inspections, FPI, and 

ECI for cracks and electrical arc-out 

defects. 

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 initial and 

repetitive FPI, ECI, and TEV 

inspections. The proposed AD would 

require you to use the service 

information described previously to 

perform these actions. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 1,531 engines installed on 

airplanes of U.S. registry. We also 

estimate that it would take about 2 

work-hours per engine to perform the 

proposed on-wing inspection on 300 

engines, and 4 work-hours per engine to 

perform the proposed shop inspection 

on 1,531 engines. The average labor rate 

is $80 per work-hour. There are no 

required parts. Based on these figures, 

we estimate the total cost of the 

proposed AD to U.S. operators to be 

$537,920. 

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, Incorporation by reference, 

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 

removing Amendment 39–14977 (72 FR 

10054, March 7, 2007) and Amendment 

39–15179 (72 FR 49183, August 28, 

2007), and by adding a new 

airworthiness directive to read as 

follows: 

General Electric Company: Docket No. FAA– 

2007–27687; Directorate Identifier 2000– 

NE–42–AD. 

Comments Due Date 

(a) The Federal Aviation Administration 

(FAA) must receive comments on this 

airworthiness directive (AD) action by June 

16, 2009. 

(b) This AD supersedes AD 2007–05–16, 

Amendment 39–14977 and AD 2007–07– 

07R1, Amendment 39–15179. 

Applicability 

(c) This AD applies to General Electric 

Company (GE) CF34–1A, –3A, –3A1, –3A2, 

–3B, and –3B1 turbofan engines, with fan 

disks part numbers (P/Ns) 5921T18G01, 

5921T18G09, 5921T18G10, 5921T54G01, 

5922T01G02, 5922T01G04, 5922T01G05, 

6020T62G04, 6020T62G05, 6078T00G01, 

6078T57G01, 6078T57G02, 6078T57G03, 

6078T57G04, 6078T57G05, and 6078T57G06 

installed. These engines are installed on, but 

not limited to, Bombardier Canadair airplane 

models CL–600–2A12, –2B16, and –2B19. 

Unsafe Condition 

(d) This AD results from an updated risk 

analysis by GE that shows we need to take 

corrective action that is more stringent. We 

are issuing this AD to prevent an 

uncontained failure of the fan disk, which 

could result in damage to the airplane. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified unless the 

actions have already been done. 

Removing Certain Fan Disks from Service 

(f) For fan disks listed by P/N and serial 

number (SN) in Table 2 of GE Alert Service 

Bulletin (ASB) CF34–BJ S/B 72–A0212, 

Revision 04, dated October 27, 2008; or in 

Table 2 of GE ASB CF34–AL S/B 72–A0233, 

Revision 04, dated October 27, 2008 that 

have 8,000 CSN or more on the effective date 

of this AD, remove fan disks from service 

within 15 days after the effective date of this 

AD. 

(g) For fan disks listed by P/N and serial 

number (SN) in Table 2 of GE Alert Service 

Bulletin (ASB) CF34–BJ S/B 72–A0212, 

Revision 04, dated October 27, 2008; or in 

Table 2 of GE ASB CF34–AL S/B 72–A0233, 

Revision 04, dated October 27, 2008, that 

have fewer than 8,000 CSN on the effective 

date of this AD, remove fan disks from 

service before accumulating 8,000 CSN. 

Inspections of Tier 1 Fan Disks 

(h) For CF34–3A1 engines with fan drive 

shaft, P/N 6036T78P02, and airworthiness 

limitation section life limit of 22,000 CSN, 

and CF34–3B1 turbofan engines with Tier 1 

fan disks listed by P/N, SN, and Tier in Table 

1 of GE ASB No. CF34–AL S/B 72–A0233, 

Revision 04, dated October 27, 2008, do the 

following: 

Tactile and Enhanced Visual (TEV) 

Inspections, Fluorescent Penetrant 

Inspections (FPI), and Eddy Current 

Inspections (ECI) 

(1) For Tier 1 fan disks not already 

inspected using GE ASB No. CF34–AL S/B 

72–A0233, Revision 03, dated June 27, 2007, 

or earlier issue, do the following: 

(i) Perform a TEV inspection, an FPI, and 

an ECI on the Tier 1 fan disks within 650 

cycles-in-service (CIS) after the effective date 

of this AD. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–AL S/B 72–A0233, Revision 04, dated 


dwashington3 on PROD1PC60 with PROPOSALS
Federal Register / Vol. 74, No. 73 / Friday, April 17, 2009 / Proposed Rules 17801 

October 27, 2008, to perform the TEV 

inspection, FPI, and ECI. 

(ii) Thereafter, perform repetitive ECI on 

the Tier 1 fan disks within intervals of 3,000 

cycles-since-last inspection (CSLI). Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–AL S/B 72– 

A0252, dated October 27, 2008, to perform 

the repetitive ECI. 

(2) For Tier 1 fan disks, listed by P/N, SN, 

and Tier in Table 1 of GE ASB No. CF34–AL 

S/B 72–A0233, Revision 04, dated October 

27, 2008; already inspected using GE ASB 

No. CF34–AL S/B 72–A0233, Revision 03, 

dated June 27, 2007, or earlier issue, do the 

following: 

(i) For Tier 1 fan disks with 2,500 or more 

CSLI on the effective date of this AD, perform 

an ECI on the Tier 1 fan disks within 500 CIS 

after the effective date of this AD. Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–AL S/B 72– 

A0252, dated October 27, 2008, to perform 

the ECI. 

(ii) For Tier 1 fan disks with fewer than 

2,500 CSLI on the effective date of this AD, 

perform an ECI on the Tier 1 fan disks within 

3,000 CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–AL S/B 72–A0252, dated October 27, 

2008, to perform the ECI. 

(iii) Thereafter, perform repetitive ECI on 

the Tier 1 fan disks within intervals of 3,000 

CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–AL S/B 72–A0252, dated October 27, 

2008, to perform the repetitive ECI. 

Inspections of Tier 2 Fan Disks 

(i) For CF34–3A1 engines with fan drive 

shaft, P/N 6036T78P02, and airworthiness 

limitation section life limit of 22,000 CSN, 

and CF34–3B1 turbofan engines with Tier 2 

fan disks listed by P/N, SN, and Tier in Table 

1 of GE ASB No. CF34–AL S/B 72–A0233, 

Revision 04, dated October 27, 2008, do the 

following: 

TEV Inspections, FPI, and ECI 

(1) For Tier 2 fan disks not already 

inspected using GE ASB No. CF34–AL S/B 

72–A0233, Revision 03, dated June 27, 2007, 

or earlier issue, do the following: 

(i) Perform a TEV inspection, an FPI, and 

an ECI on the Tier 2 fan disks within 2,000 

CIS after the effective date of this AD, or 

within 5,000 CIS after September 12, 2007, or 

by March 19, 2012, whichever occurs first. 

Use paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–AL S/B 72– 

A0233, Revision 04, dated October 27, 2008, 

to perform the TEV inspection, FPI, and ECI. 

(ii) Thereafter, perform repetitive eddy 

current inspections on the Tier 2 fan disks 

within intervals of 3,000 CSLI. Use paragraph 

3.A of the Accomplishment Instructions of 

GE ASB CF34–AL S/B 72–A0252, dated 

October 27, 2008, to perform the repetitive 

ECI. 

(2) For Tier 2 fan disks, listed by P/N, SN, 

and Tier in Table 1 of GE ASB No. CF34–AL 

S/B 72–A0233, Revision 04, dated October 

27, 2008; already inspected using GE ASB 

No. CF34–AL S/B 72–A0233, Revision 03, 

dated June 27, 2007, or earlier issue, do the 

following: 

(i) For Tier 2 fan disks with 2,500 or more 

CSLI on the effective date of this AD, perform 

an ECI on the Tier 2 fan disks within 500 CIS 

after the effective date of this AD. Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–AL S/B 72– 

A0252, dated October 27, 2008, to perform 

the ECI. 

(ii) For Tier 2 fan disks with fewer than 

2,500 CSLI on the effective date of this AD, 

perform an ECI on the Tier 2 fan disks within 

3,000 CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–AL S/B 72–A0252, dated October 27, 

2008, to perform the ECI. 

(iii) Thereafter, perform repetitive ECI on 

the Tier 2 fan disks within intervals of 3,000 

CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–AL S/B 72–A0252, dated October 27, 

2008, to perform the repetitive ECI. 

Inspections of Tier 3 Fan Disks 

(j) For CF34–3A1 engines with fan drive 

shaft, P/N 6036T78P02, and airworthiness 

limitation section life limit of 22,000 CSN, 

and CF34–3B1 turbofan engines with Tier 3 

fan disks, listed by P/N, SN, and Tier in 

Table 1 of GE ASB No. CF34–AL S/B 72– 

A0233, Revision 04, dated October 27, 2008, 

do the following: 

TEV Inspections, FPI, and ECI 

(1) For Tier 3 fan disks not already 

inspected using GE ASB No. CF34–AL S/B 

72–A0233, Revision 03, dated June 27, 2007, 

or earlier issue, perform a TEV inspection, an 

FPI, and an ECI on the Tier 3 fan disks within 

5,000 CIS after September 12, 2007, or by 

March 19, 2012, whichever is earlier. Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–AL S/B 72– 

A0253, Revision 04, dated October 27, 2008, 

to perform the TEV inspection, FPI, and ECI. 

(2) For Tier 3 fan disks, listed by P/N, SN, 

and Tier in Table 1 of GE ASB No. CF34–AL 

S/B 72–A0233, Revision 04, dated October 

27, 2008; already inspected using GE ASB 

No. CF34–AL S/B 72–A0233, Revision 03, 

dated June 27, 2007, or earlier issue, perform 

a TEV inspection and an ECI on the Tier 3 

fan disks at the next shop visit. Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–AL S/B 72– 

A0253, dated October 27, 2008, to perform 

the TEV inspection and ECI. 

(3) Repetitive ECI on the Tier 3 fan disks 

are not required. 

Inspections of Tier 1 Fan Disks 

(k) For CF34–1A turbofan engines with fan 

drive shaft, P/N 6036T78P02, and 

airworthiness limitation section life limit of 

15,000 CSN, CF34–3A, CF34–3A2, and 

CF34–3B turbofan engines with Tier 1 fan 

disks listed by P/N, SN, and Tier in Table 1 

of GE ASB No. CF34–BJ S/B 72–A0212, 

Revision 04, dated October 27, 2008, do the 

following: 

TEV Inspections, FPI, and ECI 

(1) For Tier 1 fan disks not already 

inspected using GE ASB No. CF34–BJ S/B 

72–A0212, Revision 03, dated June 27, 2007, 

or earlier issue: 

(i) Perform a TEV inspection, FPI, and ECI 

on the Tier 1 fan disks within 350 CIS after 

the effective date of this AD. Use paragraph 

3.A of the Accomplishment Instructions of 

GE ASB CF34–BJ S/B 72–A0212, Revision 04, 

dated October 27, 2008, to perform the TEV 

inspection. 

(ii) Thereafter, perform repetitive ECI on 

the Tier 1 fan disks within intervals of 3,000 

CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–BJ S/B 72–A0235, dated October 27, 

2008, to perform the repetitive ECI. 

(2) For Tier 1 fan disks, listed by P/N, SN, 

and Tier in Table 1 of GE ASB No. CF34–BJ 

S/B 72–A0212, Revision 04, dated October 

27, 2008; already inspected using GE ASB 

No. CF34–BJ S/B 72–A0212, Revision 03, 

dated June 27, 2007, or earlier issue, do the 

following: 

(i) For Tier 1 fan disks with 2,500 or more 

CSLI on the effective date of this AD, perform 

an ECI on the Tier 1 fan disks within 500 CIS 

after the effective date of this AD. Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–BJ S/B 72– 

A0235, dated October 27, 2008, to perform 

the ECI. 

(ii) For Tier 1 fan disks with fewer than 

2,500 CSLI on the effective date of this AD, 

perform an ECI on the Tier 1 fan disks within 

3,000 CSLI after the effective date of this AD. 

Use paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–BJ S/B 72– 

A0235, dated October 27, 2008, to perform 

the ECI. 

(iii) Thereafter, perform repetitive ECI on 

the Tier 1 fan disks within intervals of 3,000 

CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–AL S/B 72–A0235, dated October 27, 

2008, to perform the repetitive ECI. 

Inspections of Tier 2 Fan Disks 

(l) For CF34–1A turbofan engines with fan 

drive shaft, P/N 6036T78P02, and 

airworthiness limitation section life limit of 

15,000 CSN, CF34–3A, CF34–3A2, and 

CF34–3B turbofan engines with Tier 2 fan 

disks listed by P/N, SN, and Tier in Table 1 

of GE ASB No. CF34–AL S/B 72–A0212, 

Revision 04, dated October 27, 2008, do the 

following: 

TEV Inspections, FPI, and ECI 

(1) For Tier 2 fan disks not already 

inspected using GE ASB No. CF34–AL S/B 

72–A0212, Revision 03, dated June 27, 2007, 

or earlier issue, do the following: 

(i) Perform a TEV inspection, FPI, and ECI 

on the Tier 2 fan disks within 2,000 CIS after 

the effective date of this AD, or within 3,500 

CIS after September 12, 2007, or by March 

19, 2012, whichever occurs first. Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–BJ S/B 72– 

A0212, Revision 04, dated October 27, 2008, 

to perform the TEV inspection, FPI, and ECI. 

(ii) Thereafter, perform repetitive ECI on 

the Tier 2 fan disks within intervals of 3,000 

CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–BJ S/B 72–A0235, dated October 27, 

2008, to perform the repetitive ECI. 

(2) For Tier 2 fan disks, listed by P/N, SN, 

and Tier in Table 1 of GE ASB No. CF34–BJ 

S/B 72–A0212, Revision 04, dated October 

27, 2008; already inspected using GE ASB 


dwashington3 on PROD1PC60 with PROPOSALS
17802 Federal Register / Vol. 74, No. 73 / Friday, April 17, 2009 / Proposed Rules 

No. CF34–BJ S/B 72–A0212, Revision 03, 

dated June 27, 2007, or earlier issue, do the 

following: 

(i) For Tier 2 fan disks with 2,500 or more 

CSLI on the effective date of this AD, perform 

an ECI on the Tier 2 fan disks within 500 CIS 

after the effective date of this AD. Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–BJ S/B 72– 

A0235, dated October 27, 2008, to perform 

the ECI. 

(ii) For Tier 2 fan disks with fewer than 

2,500 CSLI on the effective date of this AD, 

perform an ECI on the Tier 2 fan disks within 

3,000 CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–BJ S/B 72–A0235, dated October 27, 

2008, to perform the ECI. 

(iii) Thereafter, perform repetitive ECI on 

the Tier 2 fan disks within intervals of 3,000 

CSLI. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–BJ S/B 72–A0235, dated October 27, 

2008, to perform the repetitive ECI. 

Inspections of Tier 3 Fan Disks 

(m) For CF34–1A turbofan engines with fan 

drive shaft, P/N 6036T78P02, and 

airworthiness limitation section life limit of 

15,000 CSN, CF34–3A, CF34–3A2, and 

CF34–3B turbofan engines with Tier 3 fan 

disks listed by P/N, SN, and Tier in Table 1 

of GE ASB No. CF34–BJ S/B 72–A0212, 

Revision 04, dated October 27, 2008, do the 

following: 

TEV Inspections, FPI, and ECI 

(1) For Tier 3 fan disks not already 

inspected using GE ASB No. CF34–AL S/B 

72–A0212, Revision 03, dated June 27, 2007, 

or earlier issue, perform a TEV inspection, 

FPI, and ECI on the Tier 3 fan disks within 

3,500 CIS after September 12, 2007, or by 

March 19, 2012, whichever is earlier. Use 

paragraph 3.A of the Accomplishment 

Instructions of GE ASB CF34–AL S/B 72– 

A0234, dated October 27, 2008, to perform 

the TEV inspection, FPI, and ECI. 

(2) For Tier 3 fan disks, listed by P/N, SN, 

and Tier in Table 1 of GE ASB No. CF34–BJ 

S/B 72–A0212, Revision 04, dated October 

27, 2008; already inspected using GE ASB 

No. CF34–BJ S/B 72–A0212, Revision 03, 

dated June 27, 2007, or earlier issue, perform 

a TEV inspection and an ECI on the Tier 3 

fan disks within 3,500 CSLI, but no later than 

March 19, 2012. Use paragraph 3.A of the 

Accomplishment Instructions of GE ASB 

CF34–BJ S/B 72–A0234, dated October 27, 

2008, to perform the TEV inspection and ECI. 

(3) Repetitive ECI on the Tier 3 fan disks 

are not required. 

Alternative Methods of Compliance 

(n) 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. 

Mandatory Terminating Action 

(o) Remove from service, Tier 1 and Tier 

2 fan disks listed by P/N, SN, and Tier in 

Table 1 of GE ASB No. CF34–AL S/B 72– 

A0233, Revision 04, dated October 27, 2008; 

or CF34–BJ S/B 72–0212, Revision 04, dated 

October 27, 2008, before they exceed their 

limited life cycles or September 30, 2018, 

whichever occurs first. 

Related Information 

(p) Contact Tara Chaidez, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; e-mail: tara.chaidez@faa.gov; 

telephone (781) 238–7773; fax (781) 238– 

7199, for more information about this AD. 

(q) The following GE Alert Service 

Bulletins pertain to the subject of this AD: 

• CF34–AL S/B 72–A0233, Revision 04, 

dated October 27, 2008, 

• CF34–AL S/B 72–A0252, dated October 

27, 2008, 

• CF34–AL S/B 72–A0253, dated October 

27, 2008, 

• CF34–BJ S/B 72–A0212, Revision 04, 

dated October 27, 2008, 

• CF34–BJ S/B 72–A0234, dated October 

27, 2008, and 

• CF34–BJ S/B 72–A0235, dated October 

27, 2008. 

Contact General Electric Company via 

Lockheed Martin Technology Services, 10525 

Chester Road, Suite C, Cincinnati, Ohio 

45215; telephone (513) 672–8400; fax (513) 

672–8422, for a copy of this service 

information. 

Issued in Burlington, Massachusetts, on 

April 9, 2009. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. E9–8787 Filed 4–16–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF THE INTERIOR 

Office of Surface Mining Reclamation 

and Enforcement 

30 CFR Part 935 

[OH–253–FOR; Docket ID: OSM–2009–0001] 

Ohio Regulatory Program 

AGENCY: Office of Surface Mining 

Reclamation and Enforcement (OSM), 

Interior. 

ACTION: Proposed rule; public comment 

period and opportunity for public 

hearing on the proposed amendment. 

SUMMARY: We are announcing receipt of 

an amendment to the Ohio regulatory 

program (the ‘‘Ohio program’’) under 

the Surface Mining Control and 

Reclamation Act of 1977 (SMCRA or the 

Act). Ohio has submitted changes to its 

regulations as a result of its five-year 

review of Ohio’s internal and 

procedural rules. Changes relate to 

practice and procedures before the 

reclamation commission, including 

definitions, commission meetings, 

appearance and practice before the 

commission; appeals to the reclamation 

commission; filing and service of 

papers; temporary relief; responsive 

pleadings; discovery; motions; prehearing procedures; notice of hearings 

and continuance of hearings; site views 

and location of hearings; conduct of 

evidentiary hearings; reports and 

recommendations of the hearing officer; 

and decisions of the commission. 

This document gives the times and 

locations that the Ohio program and 

proposed amendment to that program 

are available for your inspection, the 

comment period during which you may 

submit written comments on the 

amendment, and the procedures that we 

will follow for the public hearing, if one 

is requested. 

DATES: We will accept written 

comments until 4 p.m., d.s.t. May 18, 

2009. If requested, we will hold a public 

hearing on May 12, 2009. We will 

accept requests to speak at a hearing 

until 4 p.m., d.s.t. on May 4, 2009. 

ADDRESSES: You may submit comments, 

identified by OH–253–FOR; Docket ID: 

OSM–2009–0001 by either of the 

following two methods: 

Federal eRulemaking Portal: 

www.regulations.gov. The proposed rule 

has been assigned Docket ID: OSM– 

2009–0001. If you would like to submit 

comments through the Federal 

eRulemaking Portal, go to 

www.regulations.gov and do the 

following. Click on the ‘‘Advanced 

Docket Search’’ button on the right side 

of the screen. Type in the Docket ID 

OSM–2009–0001 and click the 

‘‘Submit’’ button at the bottom of the 

page. The next screen will display the 

Docket Search Results for the 

rulemaking. If you click on OSM–2009– 

0001, you can view the proposed rule 

and submit a comment. You can also 

view supporting material and any 

comments submitted by others. 

Mail/Hand Delivery/Courier: Mr. 

George Rieger, Chief, Pittsburgh Field 

Division, Columbus Office, Office of 

Surface Mining Reclamation and 

Enforcement, 4605 Morse Road, Room 

102, Columbus, Ohio 43230. 

Instructions: For detailed instructions 

on submitting comments and additional 

information on the rulemaking process, 

see the ‘‘Public Comment Procedures’’ 

heading of the SUPPLEMENTARY

INFORMATION section of this document. 

Docket: In addition to obtaining 

copies of documents at 

www.regulations.gov, information may 

also be obtained at the addresses listed 

below during normal business hours, 

Monday through Friday, excluding 

holidays. You may receive one free copy 

of the amendment by contacting OSM’s 

Pittsburgh Field Division Office. 


dwashington3 on PROD1PC60 with PROPOSALS