Federal Register / Vol. 62, No. 182 / Friday, September 19, 1997 / Proposed Rules 49179

17, 1995, until the bearing TIS since new is

6,000 hours or more. Remove from service,

prior to further flight, engines which exhibit

MCD metallic debris defined as not

serviceable in accordance with CFM56–2 SB

No. 72–620, Revision 4, dated November 17,

1995.

(e) For CFM56–5 series engines equipped

with No. 3 bearing, P/N 9542M60P01, inspect

the forward sump MCD in accordance with

CFM56–5 Alert Service Bulletin (ASB) No.

72–A118, Revision 1, dated August 1, 1997,

within the next 50 hours TIS after the

effective date of this AD. Thereafter, inspect

the forward sump MCD at intervals not to

exceed 50 hours TIS SLI in accordance with

CFM56–5 ASB No. 72–A118, Revision 1,

dated August 1, 1997. Remove from service,

prior to further flight, engines which exhibit

MCD metallic debris defined as not

serviceable in accordance with CFM56–5

ASB No. 72–A118, Revision 1, dated August

1, 1997.

(f) Bearing inspections accomplished in

accordance with AD 89–17–04 or AD 89–23–

06 satisfy the corresponding requirements of

this AD.

(g) For the purpose of this AD, a shop visit

is defined as exposure of the inlet gearbox.

(h) An alternative method of compliance or

adjustment of the compliance time that

provides an acceptable level of safety may be

used if approved by the Manager, Engine

Certification Office. The request should be

forwarded through an appropriate FAA

Principal Maintenance Inspector, who may

add comments and then send it to the

Manager, Engine Certification Office.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this airworthiness directive,

if any, may be obtained from the Engine

Certification Office.

(i) Special flight permits may be issued in

accordance with sections 21.197 and 21.199

of the Federal Aviation Regulations (14 CFR

21.197 and 21.199) to operate the aircraft to

a location where the requirements of this AD

can be accomplished.

Issued in Burlington, Massachusetts, on

September 12, 1997.

Mark C. Fulmer,

Acting Manager, Engine and Propeller

Directorate, Aircraft Certification Service.

[FR Doc. 97–24909 Filed 9–18–97; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97–ANE–29–AD]

RIN 2120–AA64

Airworthiness Directives; CFM

International CFM56–5B/2P Series

Turbofan Engines

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Notice of proposed rulemaking

(NPRM).

SUMMARY: This document proposes the

adoption of a new airworthiness

directive (AD) that is applicable to CFM

International (CFMI) CFM56–5B/2P

series turbofan engines. This proposal

would require a reduction of the low

cycle fatigue (LCF) retirement life for

certain low pressure turbine (LPT)

cases. This proposal is prompted by the

results of a refined life analysis

performed by the manufacturer which

revealed minimum calculated LCF lives

significantly lower than the published

LCF retirement life. The actions

specified by the proposed AD are

intended to prevent a LCF failure of the

LPT case, which could result in damage

to the aircraft.

DATES: Comments must be received by

November 18, 1997.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), New England

Region, Office of the Assistant Chief

Counsel, Attention: Rules Docket No.

97–ANE–29–AD, 12 New England

Executive Park, Burlington, MA 01803–

5299. Comments may be inspected at

this location between 8:00 a.m. and 4:30

p.m., Monday through Friday, except

Federal holidays.

FOR FURTHER INFORMATION CONTACT:

Robert J. Ganley, Aerospace Engineer,

Engine Certification Office, FAA, Engine

and Propeller Directorate, 12 New

England Executive Park, Burlington, MA

01803–5299; telephone (781) 238–7138;

fax (781) 238–7199.

SUPPLEMENTARY INFORMATION:

Comments Invited

Interested persons are invited to

participate in the making of the

proposed rule by submitting such

written data, views, or arguments as

they may desire. Communications

should identify the Rules Docket

number and be submitted in triplicate to

the address specified above. All

communications received on or before

the closing date for comments, specified

above, will be considered before taking

action on the proposed rule. The

proposals contained in this notice may

be changed in light of the comments

received.

Comments are specifically invited on

the overall regulatory, economic,

environmental, and energy aspects of

the proposed rule. All comments

submitted will be available, both before

and after the closing date for comments,

in the Rules Docket for examination by

interested persons. A report

summarizing each FAA-public contact

concerned with the substance of this

proposal will be filed in the Rules

Docket.

Commenters wishing the FAA to

acknowledge receipt of their comments

submitted in response to this notice

must submit a self-addressed, stamped

postcard on which the following

statement is made: ‘‘Comments to

Docket Number 97–ANE–29–AD.’’ The

postcard will be date stamped and

returned to the commenter.

Availability of NPRMs

Any person may obtain a copy of this

NPRM by submitting a request to the

FAA, New England Region, Office of the

Assistant Chief Counsel, Attention:

Rules Docket No. 97–ANE–29–AD, 12

New England Executive Park,

Burlington, MA 01803–5299.

Discussion

This proposed airworthiness directive

(AD) is applicable to CFM International

(CFMI) CFM56–5B/2P series turbofan

engines. A study performed by the

manufacturer using updated lifing

analyses based on recent engine test

results revealed that certain low

pressure turbine (LPT) cases have

minimum calculated low cycle fatigue

(LCF) lives which are significantly

lower than the published LCF

retirement life. This condition, if not

corrected, could result in a LCF failure

of the LPT case, which could result in

damage to the aircraft.

Since an unsafe condition has been

identified that is likely to exist or

develop on other products of this same

type design, the proposed AD would

require a reduction of the LCF

retirement life for certain LPT cases.

There are approximately 18 engines of

the affected design in the worldwide

fleet. The manufacturer has advised the

FAA that there are no engines installed

on U.S. registered aircraft that would be

affected by this AD. Therefore, there is

no associated cost impact on U.S.

operators as a result of this AD.

However, should an affected engine be

imported on an aircraft and placed on

the U.S. registry in the future, and

assuming that the parts cost is

proportional to the reduction of the LCF

retirement life, the required parts would

cost approximately $40,423 per engine.

Based on these figures, the total cost

impact of the proposed AD is estimated

to be $40,423 per engine.

The regulations proposed herein

would not have substantial direct effects

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. Therefore,
49180 Federal Register / Vol. 62, No. 182 / Friday, September 19, 1997 / Proposed Rules

in accordance with Executive Order

12612, it is determined that this

proposal would not have sufficient

federalism implications to warrant the

preparation of a Federalism Assessment.

For the reasons discussed above, I

certify that 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) if

promulgated, 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. A copy of the draft

regulatory evaluation prepared for this

action is contained in the Rules Docket.

A copy of it may be obtained by

contacting the Rules Docket at the

location provided under the caption

ADDRESSES.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation

safety, Safety.

The Proposed Amendment

Accordingly, pursuant to the

authority delegated to me by the

Administrator, the Federal Aviation

Administration proposes to amend part

39 of the Federal Aviation Regulations

(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), 40101, 40113,

44701.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

CFM International: Docket No. 97–ANE–29–

AD.

Applicability: CFM International (CFMI)

CFM56–5B1/2P, –5B2/2P, –5B3/2P, and

–5B4/2P turbofan engines, installed with low

pressure turbine (LPT) case, Part Number

(P/N) 338–117–004–0, installed on but

not limited to Airbus A320 and A321

series aircraft.

Note 1: This airworthiness directive (AD)

applies to each engine identified in the

preceding applicability provision, regardless

of whether it has been modified, altered, or

repaired in the area subject to the

requirements of this AD. For engines that

have been modified, altered, or repaired so

that the performance of the requirements of

this AD is affected, the owner/operator must

request approval for an alternative method of

compliance in accordance with paragraph (e)

of this AD. The request should include an

assessment of the effect of the modification,

alteration, or repair on the unsafe condition

addressed by this AD; and, if the unsafe

condition has not been eliminated, the

request should include specific proposed

actions to address it.

Compliance: Required as indicated, unless

accomplished previously.

To prevent a low cycle fatigue (LCF) failure

of the LPT case, which could result in

damage to the aircraft, accomplish the

following:

(a) Remove from service LPT case, P/N

338–117–004–0, and replace with a

serviceable part, as follows:

(1) For CFM56–5B2/2P and –5B3/2P

engines, prior to accumulating 10,500 cycles.

(2) For CFM56–5B1/2P and –5B4/2P

engines, prior to accumulating 15,500 cycles.

(b) This action establishes the new LCF

retirement lives of 10,500 and 15,500 cycles

for the engines stated in paragraphs (a)(1) and

(a)(2) of this AD, which are published in

Chapter 05 of CFM56–5B Engine Shop

Manual, CFMI–TP.SM.9.

(c) For the purpose of this AD, a

‘‘serviceable part’’ is one that has not

exceeded its respective new life limit as set

out in this AD.

(d) Except as provided in paragraph (e) of

this AD, no alternative replacement times

may be approved for LPT case, P/N 338–117–

004–0.

(e) An alternative method of compliance or

adjustment of the compliance time that

provides an acceptable level of safety may be

used if approved by the Manager, Engine

Certification Office. The request should be

forwarded through an appropriate FAA

Principal Maintenance Inspector, who may

add comments and then send it to the

Manager, Engine Certification Office.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this airworthiness directive,

if any, may be obtained from the Engine

Certification Office.

(f) Special flight permits may be issued in

accordance with sections 21.197 and 21.199

of the Federal Aviation Regulations (14 CFR

21.197 and 21.199) to operate the aircraft to

a location where the requirements of this AD

can be accomplished.

Issued in Burlington, Massachusetts, on

September 12, 1997.

Mark C. Fulmer,

Acting Manager, Engine and Propeller

Directorate, Aircraft Certification Service.

[FR Doc. 97–24911 Filed 9–18–97; 8:45 am]

BILLING CODE 4910–13–P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 71

[Airspace Docket No. 97–AGL–42]

Proposed Modification of Class D and

Class E Airspace and Removal of

Class E Airspace; Belleville, IL,

MidAmerica Airport

AGENCY: Federal Aviation

Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking.

SUMMARY: This notice proposes to

modify Class D and Class E airspace and

remove Class E airspace at Belleville, IL.

A Global Positioning System (GPS)

Standard Instrument Approach

Procedure (SIAP) to Runway 14R, a GPS

SIAP to Runway 14L, a GPS SIAP to

Runway 32R, a GPS SIAP to Runway

32L, an Instrument Landing System

(ILS) SIAP to Runway 14R, a IH–ILS

SIAP to Runway 14R, a HI–ILS SIAP to

Runway 32L, an ILS SIAP to Runway

32L, an ILS SIAP to Runway 32R, a

Nondirectional Radio Beacon (NDB)

SIAP to Runway 32R, an NDB SIAP to

Runway 32L, a Tactical Air Navigation

(TACAN) SIAP to Runway 32L, a

TACAN SIAP to Runway 14R, a HI–

TACAN SIAP to Runway 14R, a HI–

TACAN SIAP to Runway 32L, and a

TACAN–A SIAP have been developed

for MidAmerica Airport. Controlled

airspace extending upward from the

surface is needed to contain aircraft

executing these approaches. This action

would increase the radius of the existing

Class D airspace, and decrease the

radius of the existing Class E airspace

while adding an extension to the

northwest of the existing Class E

airspace. This action would also remove

the existing Class E airspace designated

as an extension to the existing Class D

airspace. The intended effect of this

proposal is to provide segregation of

aircraft using instrument approach

procedures in instrument conditions

from other aircraft operating in visual

weather conditions.

DATES: Comments must be received on

or before November 3, 1997.

ADDRESSES: Send comments on the

proposal in triplicate to: Federal

Aviation Administration, Office of the

Assistant Chief Counsel, AGL–7, Rules

Docket No. 97–AGL–42, 2300 East

Devon Avenue, Des Plaines, Illinois

60018.

The official docket may be examined

in the Office of the Assistant Chief

Counsel, Federal Aviation

Administration, 2300 East Devon

Avenue, Des Plaines, Illinois. An

informal docket may also be examined

during normal business hours at the Air

Traffic Division, Operations Branch,

Federal Aviation Administration, 2300

East Devon Avenue, Des Plaines,

Illinois.

FOR FURTHER INFORMATION CONTACT:

Michelle M. Behm, Air Traffic Division,

Airspace Branch, AGL–520, Federal

Aviation Administration, 2300 East

Devon Avenue, Des Plaines, Illinois

60018, telephone (847) 294–7568.