27448 Federal Register / Vol. 60, No. 100 / Wednesday, May 24, 1995 / Proposed Rules

necessary to provide for global

positioning system (GPS) navigation

capability and other enhanced features.

The proposed compliance time of four

years for the EICAS installation

requirements of this AD will allow a

portion of the EICAS computers

installed on airplanes affected by this

AD to have the required EICAS message

upgrade made coincidentally with those

other planned EICAS changes, thereby

reducing the costs and scheduling

impact of such changes on operators. As

indicated earlier in this preamble, the

FAA specifically invites the submission

of comments and other data regarding

the economic aspect of this proposal.

The proposed revision to the AFM

that would be required subsequent to

the installation of the upgraded EICAS

computers would take approximately 1

work hour per airplane to accomplish,

at an average labor rate of $60 per work

hour. Based on these figures, the total

cost impact of this proposed action on

U.S. operators is estimated to be

$35,280, or $60 per airplane.

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. App. 1354(a), 1421

and 1423; 49 U.S.C. 106(g); and 14 CFR

11.89.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

Boeing: Docket 94–NM–140–AD.

Applicability: All Model 747–400, 757, and

767 series airplanes; certificated in any

category.

Compliance: Required as indicated, unless

accomplished previously.

To ensure that the flight crew is

appropriately aware of conditions involving

a severely contaminated airplane fuel system

and the associated increased potential for

engine power loss, accomplish the following:

(a) For all Model 747–400 series airplanes:

Within 60 days after the effective date of this

AD, revise the Limitations Section of the

FAA-approved Airplane Flight Manual

(AFM) to include the following statement.

This may be accomplished by inserting a

copy of this AD in the AFM.

‘‘Respond to the EICAS STATUS CUE by

checking for the following status level

messages(s):

ENG 1 FUEL FILT

ENG 2 FUEL FILT

ENG 3 FUEL FILT

ENG 4 FUEL FILT

If more than one of these impending fuel

filter bypass messages is displayed, airplane

fuel system contamination may be present,

which can result in erratic engine operation

and engine flameout.’’

(b) For all Model 757 series airplanes, and

Model 767 series airplanes powered by

General Electric CF6–80A and CF6–80C2

engines, Pratt & Whitney PW 4000 engines,

and Rolls-Royce RB211–524 engines: Within

60 days after the effective date of this AD,

revise the Limitations Section of the FAAapproved Airplane Flight Manual (AFM) to

include the following statement. This may be

accomplished by inserting a copy of this AD

in the AFM.

‘‘Respond to the EICAS STATUS CUE by

checking for the following status level

messages(s):

R ENG FUEL FILT

L ENG FUEL FILT

If more than one of these impending fuel

filter bypass messages is displayed, airplane

fuel system contamination may be present,

which can result in erratic engine operation

and engine flameout.’’

(c) For Model 767 series airplanes powered

by Pratt & Whitney JT9D engines: Within 60

days after the effective date of this AD, revise

the Limitations Section of the FAA-approved

Airplane Flight Manual (AFM) to include the

following statement. This may be

accomplished by inserting a copy of this AD

in the AFM.

‘‘If both of the following EICAS advisory

level messages for impending fuel filter

bypass are displayed, and engine fuel icing

is not suspected (based on the fuel

temperature being too high or because engine

fuel heat has been selected ‘‘on’’), airplane

fuel system contamination may be present,

which can result in erratic engine operation

and engine flameout:

R ENG FUEL FILT

L ENG FUEL FILT’’

(d) For all Model 747–400 series airplanes;

all Model 757 series airplanes; and Model

767 series airplanes powered by General

Electric CF6–80A and CF6–80C2 engines,

Pratt & Whitney PW 4000 engines, and RollsRoyce RB211–524 engines: Accomplish the

requirements of paragraph (d)(1) and (d)(2) of

this AD:

(1) Within 4 years after the effective date

of this AD, install an upgraded engine

indication and crew alerting system (EICAS)

computer that will provide ‘‘advisory’’ level

messages to the flight crew to indicate an

impending engine fuel filter bypass condition

for each engine. The installation shall be

accomplished in accordance with a method

approved by the Manager, Seattle Aircraft

Certification Office (ACO), FAA, Transport

Airplane Directorate.

(2) Coincidental with the installation

required by paragraph (d)(1) of this AD,

remove the AFM revisions required by

paragraphs (a) and (b) of this AD, and revise

the Limitations Section of the AFM to advise

the flight crew that impending engine fuel

filter bypass advisory level messages for

multiple engines may indicate contamination

of the airplane fuel system, which can result

in erratic engine operation and engine

flameout. The revision to the Limitations

Section must be approved by the Manager,

Seattle ACO, FAA, Transport Airplane

Directorate.

(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, Seattle

ACO, FAA, Transport Airplane Directorate.

Operators shall submit their requests through

an appropriate FAA Principal Operations

Inspector, who may add comments and then

send it to the Manager, Seattle ACO.

Note: Information concerning the existence

of approved alternative methods of

compliance with this AD, if any, may be

obtained from the Seattle ACO.

(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 airplane to

a location where the requirements of this AD

can be accomplished. Issued in Renton,

Washington, on May 18, 1995. Original

Signed By:

Darrell M. Pederson,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 95–12710 Filed 5–23–95; 8:45 am]

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