Federal Register / Vol. 62, No. 186 / Thursday, September 25, 1997 / Proposed Rules 50263

By the National Credit Union

Administration Board on September 17,

1997.

Becky Baker,

Secretary of the Board.

For the reasons set forth in the

preamble, NCUA proposes to amend 12

CFR part 725 as set forth below:

PART 725—NATIONAL CREDIT UNION

ADMINISTRATION CENTRAL

LIQUIDITY FACILITY

1. The authority citation for part 725

continues to read as follows:

Authority: Secs. 301–307 Federal Credit

Union Act, 92 Stat. 3719–3722 (12 U.S.C.

1795–1795f).

2. Section 725.19 is revised to read as

follows:

§ 725.19 Collateral requirements.

(a) Each CLF advance and each Agent

loan shall be secured by a first priority

security interest in collateral of the

credit union with a net book value at

least equal to 110% of all amounts due

under the applicable CLF advance or

Agent loan, or by guarantee of the

National Credit Union Share Insurance

Fund.

(b) The CLF may accept as collateral

for each CLF advance to a Regular

member, a security interest in all assets

of the Regular member; provided

however, that the value of any assets in

which any third party has a perfected

security interest that is superior to the

security interest of the CLF shall be

excluded for purposes of complying

with the requirements of paragraph (a)

of this section.

(c) The CLF may accept as collateral

for each CLF advance to an Agent

member, a security interest in the Agent

loans for which the CLF advance was

made; provided however, that the

collateral for such Agent loan meets the

requirements of paragraph (a) of this

section.

[FR Doc. 97–25359 Filed 9–24–97; 8:45 am]

BILLING CODE 7535–01–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97–NM–54–AD]

RIN 2120–AA64

Airworthiness Directives; Boeing

Model 757–200 Series Airplanes

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

certain Boeing Model 757–200 series

airplanes. This proposal would require

the application of a sealant, secondary

fuel barrier, and corrosion-inhibiting

compound to certain portions of the

wing center section. This proposal is

prompted by reports indicating that,

during manufacture, the secondary fuel

barrier was not applied to certain

portions of the wing center section. The

actions specified by the proposed AD

are intended to prevent leakage of fuel

through the fasteners, sealant, or

structural cracks in the center section

structure, which could result in fuel or

fuel vapors entering the cargo or

passenger compartment of the airplane.

DATES: Comments must be received by

November 5, 1997.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, ANM–103,

Attention: Rules Docket No. 97–NM–

54–AD, 1601 Lind Avenue SW., Renton,

Washington 98055–4056. Comments

may be inspected at this location

between 9:00 a.m. and 3:00 p.m.,

Monday through Friday, except Federal

holidays.

The service information referenced in

the proposed rule may be obtained from

Boeing Commercial Airplane Group,

P.O. Box 3707, Seattle, Washington

98124–2207. This information may be

examined at the FAA, Transport

Airplane Directorate, 1601 Lind Avenue

SW., Renton, Washington.

FOR FURTHER INFORMATION CONTACT:

Kathrine Rask, Aerospace Engineer,

Propulsion Branch, ANM–140S, FAA,

Seattle Aircraft Certification Office,

1601 Lind Avenue SW., Renton,

Washington; telephone (425) 227–1547;

fax (425) 227–1181.

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 shall

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–NM–54–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, Transport Airplane Directorate,

ANM–103, Attention: Rules Docket No.

97–NM–54–AD, 1601 Lind Avenue SW.,

Renton, Washington 98055–4056.

Discussion

The FAA has received reports

indicating that, during manufacture, the

secondary fuel barrier was not applied

on the outboard corners of the front spar

of the wing center section on certain

Boeing Model 757–200 series airplanes.

The secondary fuel barrier is applied to

areas of the wing center section that are

exposed to cabin pressure. If the

secondary barrier is not applied, fuel

could leak through the fasteners,

sealant, or structural cracks in the center

section structure, which could result in

fuel or fuel vapors entering the cargo or

passenger compartment of the airplane.

Explanation of Relevant Service

Information

The FAA has reviewed and approved

Boeing Service Bulletin 757–57–0053,

dated February 6, 1997, which describes

procedures for the application of a

sealant, secondary fuel barrier, and

corrosion-inhibiting compound to areas

on the front spar of the wing center

section. Accomplishment of this

application will ensure that any fuel

leaks through the tank structure do not

enter the cargo or passenger

compartments of the airplane.

Explanation of Requirements of

Proposed Rule

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 the application of a sealant,
50264 Federal Register / Vol. 62, No. 186 / Thursday, September 25, 1997 / Proposed Rules

secondary fuel barrier, and corrosioninhibiting compound to areas on the

front spar of the wing center section.

The actions would be required to be

accomplished in accordance with the

service bulletin described previously.

Cost Impact

There are approximately 724 Boeing

Model 757–200 series airplanes of the

affected design in the worldwide fleet.

The FAA estimates that 463 airplanes of

U.S. registry would be affected by this

proposed AD, that it would take

approximately 2 work hours per

airplane to accomplish the proposed

actions, and that the average labor rate

is $60 per work hour. Required parts

would cost approximately $100 per

airplane. Based on these figures, the cost

impact of the proposed AD on U.S.

operators is estimated to be $101,860, or

$220 per airplane.

The cost impact figure discussed

above is based on assumptions that no

operator has yet accomplished any of

the proposed requirements of this AD

action, and that no operator would

accomplish those actions in the future if

this AD were not adopted.

Regulatory Impact

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,

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), 40113, 44701.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

Boeing: Docket 97–NM–54–AD.

Applicability: Model 757–200 series

airplanes, line numbers 1 through 724

inclusive, certificated in any category.

Note 1: This AD applies to each airplane

identified in the preceding applicability

provision, regardless of whether it has been

otherwise 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 (b) 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 leakage of fuel through the

fasteners, sealant, or structural cracks in the

center section structure, which could result

in fuel or fuel vapors entering into the cargo

or passenger compartment of the airplane,

accomplish the following:

(a) Within 18 months after the effective

date of this AD, apply sealant, secondary fuel

barrier, and corrosion-inhibiting compound

to areas on the front spar of the wing center

section, in accordance with Figure 3 of

Boeing Service Bulletin 757–57–0053, dated

February 6, 1997.

(b) 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, Seattle

Aircraft Certification Office (ACO), 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, Seattle ACO.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the Seattle ACO.

(c) 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.

Issued in Renton, Washington, on

September 19, 1997.

Vi L. Lipski,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 97–25415 Filed 9–24–97; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97–NM–110–AD]

RIN 2120–AA64

Airworthiness Directives; Dornier

Model 328–100 Series Airplanes

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

certain Dornier Model 328–100 series

airplanes. This proposal would require

a one-time inspection to determine if

the rigging bushings in the rudder

control system protrude above the

surface of the flange in which they are

installed, and replacement of any

discrepant bushing with a new bushing.

This proposal is prompted by the

issuance of mandatory continuing

airworthiness information by a foreign

civil airworthiness authority. The

actions specified by the proposed AD

are intended to prevent jamming in the

rudder control system, and consequent

reduced controllability of the airplane.

DATES: Comments must be received by

October 21, 1997.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, ANM–103,

Attention: Rules Docket No. 97–NM–

110–AD, 1601 Lind Avenue, SW.,

Renton, Washington 98055–4056.

Comments may be inspected at this

location between 9:00 a.m. and 3:00

p.m., Monday through Friday, except

Federal holidays.

The service information referenced in

the proposed rule may be obtained from

Dornier Luftfahrt GmbH, P.O. Box 1103,

D–82230 Wessling, Germany. This

information may be examined at the

FAA, Transport Airplane Directorate,

1601 Lind Avenue, SW., Renton,

Washington.

FOR FURTHER INFORMATION CONTACT:

Connie Beane, Aerospace Engineer,