Federal Register / Vol. 65, No. 220 / Tuesday, November 14, 2000 / Rules and Regulations 68077

provision, regardless of whether it has been

modified, altered, or repaired in the area

subject to the requirements of this AD. For

airplanes 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 (c) 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 ensure continued structural integrity of

these airplanes, accomplish the following:

Airworthiness Limitations Revision

(a) Within 30 days after the effective date

of this AD, revise the Airworthiness

Limitations Section of the Instructions for

Continued Airworthiness by incorporating

the ‘‘Time Limits’’ section of the ATR42–400/

500 Maintenance Planning Document,

Revision 3, dated February 1999, into the

Airworthiness Limitations Section.

(b) Except as provided in paragraph (c) of

this AD: After the actions specified in

paragraph (a) of this AD have been

accomplished, no alternative inspections or

inspection intervals may be approved for the

structural elements specified in the

documents listed in paragraph (a) of this AD.

Alternative Methods of Compliance

(c) 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,

International Branch, ANM–116, FAA,

Transport Airplane Directorate. Operators

shall submit their requests through an

appropriate FAA Principal Maintenance

Inspector, who may add comments and then

send it to the Manager, International Branch,

ANM–116.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the International Branch,

ANM–116.

Special Flight Permits

(d) 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 airplane to

a location where the requirements of this AD

can be accomplished.

Effective Date

(e) This amendment becomes effective on

December 19, 2000.

Issued in Renton, Washington, on

November 3, 2000.

Donald L. Riggin,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 00–28828 Filed 11–13–00; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 98–ANE–69–AD; Amendment

39–11982; AD 2000–23–12]

RIN 2120–AA64

Airworthiness Directives; CFE

Company Model CFE738–1–1B

Turbofan Engines

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Final rule.

SUMMARY: This amendment adopts a

new airworthiness directive (AD),

applicable to CFE Company model

CFE738–1–1B turbofan engines, that

requires new life limits for certain HPC

rotor components in all engines. This

amendment is prompted by a reduction

in the calculated service life of certain

compressor rotor rotating parts to values

below currently approved service lives.

The actions specified by this AD are

intended to prevent failure of certain

HPC rotor components, which could

result in an uncontained engine failure

and damage to the airplane.

DATES: Effective January 16, 2001.

ADDRESSES: The rulemaking docket may

be examined at the FAA, New England

Region, Office of the Regional Counsel,

12 New England Executive Park,

Burlington, MA; or at the Office of the

Federal Register, 800 North Capitol

Street, NW, suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT:

Keith Mead, Aerospace Engineer,

Engine Certification Office, FAA, Engine

and Propeller Directorate, 12 New

England Executive Park, Burlington, MA

01803–5299; telephone: (781) 238–7744,

fax: (781) 238–7199.

SUPPLEMENTARY INFORMATION: A

proposal to amend part 39 of the Federal

Aviation Regulations (14 CFR part 39) to

include an airworthiness directive (AD)

that is applicable to CFE Company

Model CFE 738–1–1B turbofan engines

was published in the Federal Register

on December 14, 1998 (63 FR 68707).

Based on additional material stress

testing, the FAA published a

supplemental notice of proposed rule

making (SNPRM) on September 23,

1999 (64 FR 51484). That SNPRM

removed the proposal that would have

required a dimensional inspection of the

curvic couplings for parts that contain a

machining mismatch and would have

required those parts to be removed from

service. That SNPRM, however, also

introduced a requirement to remove

parts prior to a new reduced cyclic life

limit for specific high pressure

compressor rotating parts. Since those

changes expanded the scope of the

originally proposed rule, the FAA

determined that it was necessary to

reopen the comment period. At the time

the SNPRM was published, the

manufacturer anticipated that the

proposed reduced limits may be

increased based upon further testing

and analysis for the stage 4 and 5 blisk

and impeller aft shaft.

Comments Received

One comment was received. The

manufacturer, using the data obtained

from additional testing and analysis,

and life analysis prediction techniques

approved by the FAA, has requested

that the cyclic life limits for the stage 4

and 5 blisk proposed in the published

SNPRM be increased. This analysis

showed that the life predictions of two

of the three stage 4 and 5 blisk

configurations met initial published part

cyclic life requirements. The analysis

showed that the life of the remaining

stage 4 and 5 blisk configuration should

be reduced from the previously

approved cyclic life limit.

The FAA agrees with the revised

limits for the stage 4 and 5 blisk. This

final rule has been revised accordingly

by removing two of the stage 4 and 5

blisk configurations listed in the

SNPRM and listing the recalculated

cyclic life for the third stage 4 and 5

blisk configuration.

In addition, reference to inspection

work hours was removed from the

economic analysis section. Inspection

requirements for these parts were

removed in the SNPRM, and are not

applicable to this AD.

Economic Analysis

There are approximately 245 engines

of the affected design in the worldwide

fleet. The FAA estimates that 156

engines would be affected by this

proposed AD. Required parts, on a prorated basis, would cost approximately

$13,613 per engine. Based on these

figures, the total cost impact of the

proposed AD on US operators is

estimated to be $2,123628.

Regulatory Impact

This rule does not have federalism

implications, as defined in Executive

Order 13132, because it 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. Accordingly, the

FAA has not consulted with state

68078 Federal Register / Vol. 65, No. 220 / Tuesday, November 14, 2000 / Rules and Regulations

authorities prior to publication of this

rule.

For the reasons discussed above, I

certify that this action (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. A final evaluation has

been prepared for this action and 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.

Adoption of the 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), 40113, 44701.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

2000–23–12 CFE Company: Amendment

39–11982. Docket No. 98–ANE–69–AD.

Applicability: CFE Company Model

CFE738–1–1B turbofan engines, installed on

but not limited to the Dassault Aviation

Falcon 2000 series airplanes.

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 (c)

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 failure of certain high pressure

compressor

(HPC) rotor components, which could

result in an uncontained engine failure and

damage to the airplane, accomplish the

following:

(a) Remove from service certain stage 4 and

5 blisks and impeller aft shafts prior to

exceeding the new cyclic life limits as

follows, and replace with serviceable parts:

Nomenclature Part No.

(P/N) Cyclic life limit

Stage 4 and 5 Blisk ...................................................................................................................... 6079T74P08 6,700 cycles since new (CSN).

Impeller Aft Shaft ......................................................................................................................... 6079T80P04 5,100 CSN.

6079T80P05 2,160 CSN.

6079T80P06 7,100 CSN.

6079T80P07 7,100 CSN.

(b) Except for the provisions of paragraph

(c) of this AD, no parts, identified by P/N in

paragraph (a) of this AD, that exceed the new

life limits may be installed.

Alternative Methods of Compliance

(c) 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 (ECO). Operators shall

submit their requests through an appropriate

FAA Principal Maintenance Inspector, who

may add comments and then send it to the

Manager, ECO.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this airworthiness directive,

if any, may be obtained from the ECO.

Special Flight Permits

(d) 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 airplane to

a location where the requirements of this AD

can be accomplished.

Effective Date of This AD

(e) This amendment becomes effective on

January 16, 2001.

Issued in Burlington, Massachusetts, on

November 6, 2000.

Donald Plouffe,

Acting Manager, Engine and Propeller

Directorate, Aircraft Certification Service.

[FR Doc. 00–28961 Filed 11–13–00; 8:45 am]

BILLING CODE 4910–13–P

ENVIRONMENTAL PROTECTION

AGENCY

40 CFR Part 52

[NH–042–7169a; A–1–FRL–6871–2]

Approval and Promulgation of Air

Quality Implementation Plans; New

Hampshire; New Hampshire—Nitrogen

Oxides Budget and Allowance Trading

Program

AGENCY: Environmental Protection

Agency (EPA).

ACTION: Direct final rule.

SUMMARY: EPA is approving State

Implementation Plan (SIP) revisions

submitted by the State of New

Hampshire. This action consists of

approving regulations in New

Hampshire, as well as a case-specific

order and two emission quantification

protocols for Public Service of New

Hampshire (PSNH). The regulations and

order are part of a regional nitrogen

oxide ( NOX) reduction program

designed to reduce stationary source

NOX emissions during the ozone season

in the Ozone Transport Region (OTR) of

the northeastern United States. Section

184(a) of the Clean Air Act defines the

OTR as the States of Connecticut,

Delaware, Maine, Maryland,

Massachusetts, New Hampshire, New

Jersey, New York, Pennsylvania, Rhode

Island, Vermont, and the Consolidated

metropolitan Statistical Area that

includes the District of Columbia. These

SIP revisions were submitted pursuant

to section 110 of the Clean Air Act

(CAA).

DATES: This direct final rule is effective

on January 16, 2001 without further

notice, unless EPA receives adverse

comment by December 14, 2000. If

adverse comment is received, EPA will

publish a timely withdrawal of the

direct final rule in the Federal Register

and inform the public that the rule will

not take effect.

ADDRESSES: Comments may be mailed to

David Conroy, Manager, Air Quality

Planning Unit, Office of Ecosystem