23686 Federal Register / Vol. 63, No. 83 /Thursday, April 30, 1998 / Proposed Rules

determined that AD action is necessary

for products of this type design that are

certificated for operation in the United

States.

Explanation of the Provisions of the

Proposed AD

Since an unsafe condition has been

identified that is likely to exist or

develop in other Aeromot Model AMT–

200 powered gliders of the same type

design registered in the United States,

the FAA is proposing AD action. The

proposed AD would require replacing

any engine oil system hose, part number

10702, 10703, or 10704; with a hose

with a larger internal diameter, part

number 10706, 10707, or 10708.

Accomplishment of the proposed

installation would be in accordance

with Aeromot SB B.S. No. 200–79–036,

Issue Date: January 30, 1997.

Cost Impact

The FAA estimates that 18 powered

gliders in the U.S. registry would be

affected by the proposed AD, that it

would take approximately 7 workhours

per powered glider to accomplish the

proposed replacements, and that the

average labor rate is approximately $60

an hour. Based on these figures, the total

cost impact of the proposed AD on U.S.

operators is estimated to be $7,560, or

$420 per powered glider.

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 action (1) is not a

‘‘significant regulatory action’’ under

Executive Order 12866; (2) is not a

‘‘significant rule’’ under 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 has been placed 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 a new airworthiness directive

(AD) to read as follows:

Aeromot-Industria Mecanico Metalurgica

Ltda.: Docket No. 98–CE–27–AD.

Applicability: Model AMT–200 powered

gliders, serial numbers 200.046 through

200.066, certificated in any category.

Note 1: This AD applies to each powered

glider 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 powered gliders 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 (d)

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 within the next 50

hours time-in-service (TIS) after the effective

date of this AD, unless already accomplished.

To prevent inefficiency of the engine

lubricating system because of ineffective

flexible hoses, which could result in an inflight engine shutdown with consequent loss

of powered glider controllability, accomplish

the following:

(a) For powered gliders with a serial

number in the range of 200.046 through

200.058: Replace any engine oil system hose,

part number 10702; with a hose with a larger

internal diameter, part number 10706.

Accomplish the replacement in accordance

with Aeromot Service Bulletin B.S. No. 200–

79–036, Issue Date: January 30, 1997.

(b) For powered gliders with a serial

number in the range of 200.059 through

200.066: Replace any engine oil system hose,

part number 10702, 10703, or 10704; with a

hose with a larger diameter, part number

10706, 10707, or 10708. Accomplish the

replacement in accordance with Aeromot

Service Bulletin B.S. No. 200–79–036, Issue

Date: January 30, 1997.

(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 glider to a

location where the requirements of this AD

can be accomplished.

(d) An alternative method of compliance or

adjustment of the compliance times that

provides an equivalent level of safety may be

approved by the Manager, Atlanta Aircraft

Certification Office (ACO), One Crown

Center, 1895 Phoenix Blvd., suite 450,

Atlanta, Georgia 30349. The request shall be

forwarded through an appropriate FAA

Maintenance Inspector, who may add

comments and then send it to the Manager,

Atlanta ACO.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the Atlanta ACO.

(e) Questions or technical information

related to Aeromot Service Bulletin B.S. No.

200–79–036, Issue Date: January 30, 1997,

Grupo Aeromot, Aeromot-Industria Mecanico

Metalurgica Ltda., Av. das Industries-1210,

Bairro Anchieta, Caixa Postal 8031, 90200-

Porto Alegre-RS, Brazil. This service

information may be examined at the FAA,

Central Region, Office of the Regional

Counsel, Room 1558, 601 E. 12th Street,

Kansas City, Missouri 64106.

Note 3: The subject of this AD is addressed

in Brazilian AD 97–04–02, dated April 8,

1997.

Issued in Kansas City, Missouri, on April

23, 1998.

Marvin R. Nuss,

Acting Manager, Small Airplane Directorate,

Aircraft Certification Service.

[FR Doc. 98–11439 Filed 4–29–98; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 98–CE–28–AD]

RIN 2120–AA64

Airworthiness Directives; British

Aerospace Jetstream Models 3101 and

3201 Airplanes

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Notice of proposed rulemaking

(NPRM).

SUMMARY: This document proposes to

adopt a new airworthiness directive

(AD) that would apply to certain British

Aerospace Jetstream Models 3101 and

3201 airplanes that are equipped with

the ground inhibit function

(Modification JM7813A (SB 27–

JM7813A) or JM7813B). The proposed

AD would require removing the ground

inhibit time delay and the ground test

relay from the stall warning and

protection system. This proposed AD
Federal Register / Vol. 63, No. 83 /Thursday, April 30, 1998 / Proposed Rules 23687

also requires rewiring part of the stall

warning and protection system to assure

that system reliance is maintained after

relay removal. The proposed AD is the

result of mandatory continuing

airworthiness information (MCAI)

issued by the airworthiness authority for

the United Kingdom. The actions

specified by the proposed AD are

intended to prevent failure of the

ground inhibit relay while it is in the

energized position caused by the current

design, which could result in failure of

the stall warning system and possible

loss of control of the airplane in certain

situations if the crew was not aware that

the system had failed.

DATES: Comments must be received on

or before June 9, 1998.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Central Region,

Office of the Regional Counsel,

Attention: Rules Docket No. 98–CE–28–

AD, Room 1558, 601 E. 12th Street,

Kansas City, Missouri 64106. Comments

may be inspected at this location

between 8 a.m. and 4 p.m., Monday

through Friday, holidays excepted.

Service information that applies to the

proposed AD may be obtained from

British Aerospace Regional Aircraft,

Prestwick International Airport,

Ayrshire, KA9 2RW, Scotland;

telephone: (01292) 479888; facsimile:

(01292) 479703. This information also

may be examined at the Rules Docket at

the address above.

FOR FURTHER INFORMATION CONTACT: Mr.

S.M. Nagarajan, Aerospace Engineer,

FAA, Small Airplane Directorate,

Aircraft Certification Service, 1201

Walnut, suite 900, Kansas City, Missouri

64106; telephone: (816) 426–6934;

facsimile: (816) 426–2169.

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 that

summarizes 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 No. 98–CE–28–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, Central Region, Office of the

Regional Counsel, Attention: Rules

Docket No. 98–CE–28–AD, Room 1558,

601 E. 12th Street, Kansas City, Missouri

64106.

Discussion

The Civil Airworthiness Authority

(CAA), which is the airworthiness

authority for the United Kingdom,

notified the FAA that an unsafe

condition may exist on certain British

Aerospace Jetstream Models 3101 and

3201 airplanes that are equipped with

the ground inhibit function

(Modification JM7813A (SB 27–

JM7813A) or JM7813B). These

modifications incorporate a ground

inhibit relay and a ground test relay to

prevent operations of the stall warning

system until the aircraft is airborne for

three seconds. The CAA reports that

failure of the ground inhibit relay in the

energized positioned could occur.

This condition, if not corrected in a

timely manner, could result in loss of

control of the airplane in certain

situations if the crew was not aware that

the stall warning system had failed.

Relevant Service Information

British Aerospace has issued

Jetstream Alert Service Bulletin 27–A–

JM7847, dated December 24, 1997,

which specifies procedures for the

following:

—removing the ground inhibit time

delay and the ground test relay from

the stall warning and protection

system; and

—rewiring part of the stall warning and

protection system to assure that

system reliance is maintained after

relay removal.

The CAA classified this service

bulletin as mandatory in order to assure

the continued airworthiness of these

airplanes in the United Kingdom. The

CAA classifying a service bulletin as

mandatory is the same in the United

Kingdom as the FAA issuing an AD in

the United States.

The FAA’s Determination

This airplane model is manufactured

in the United Kingdom and is type

certificated for operation in the United

States under the provisions of section

21.29 of the Federal Aviation

Regulations (14 CFR 21.29) and the

applicable bilateral airworthiness

agreement. Pursuant to this bilateral

airworthiness agreement, the CAA has

kept the FAA informed of the situation

described above.

The FAA has examined the findings

of the CAA; reviewed all available

information, including the service

information referenced above; and

determined that AD action is necessary

for products of this type design that are

certificated for operation in the United

States.

Explanation of the Provisions of the

Proposed AD

Since an unsafe condition has been

identified that is likely to exist or

develop in other British Aerospace

Jetstream Models 3101 and 3102

airplanes of the same type design that

are registered in the United States and

are equipped with the ground inhibit

function (Modification JM7813A (SB

27–JM7813A) or JM7813B), the FAA is

proposing AD action. The proposed AD

would require removing the ground

inhibit time delay and the ground test

relay from the stall warning and

protection system. This proposed AD

also requires rewiring part of the stall

warning and protection system to assure

that system reliance is maintained after

relay removal. Accomplishment of the

proposed actions would be in

accordance with British Aerospace

Jetstream Alert Service Bulletin 27–A–

JM7847, dated December 24, 1997.

Cost Impact

The FAA estimates that 301 airplanes

in the U.S. registry would be affected by

the proposed AD, that it would take

approximately 6 workhours per airplane

to accomplish the proposed action, and

that the average labor rate is

approximately $60 an hour. Based on

these figures, the total cost impact of the

proposed AD on U.S. operators is

estimated to be $108,360, or $360 per

airplane.

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
23688 Federal Register / Vol. 63, No. 83 /Thursday, April 30, 1998 / Proposed Rules

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 action (1) is not a

‘‘significant regulatory action’’ under

Executive Order 12866; (2) is not a

‘‘significant rule’’ under 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 has been placed 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 a new airworthiness directive

(AD) to read as follows:

British Aerospace: Docket No. 98–CE–28–

AD.

Applicability: Jetstream Models 3101 and

3201 airplanes, all serial numbers,

certificated in any category, that are

equipped with the ground inhibit function

(Modification JM7813A (SB 27–JM7813A) or

JM7813B).

Note 1: This AD applies to each airplane

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

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 within 100 hours

time-in-service (TIS) after the effective date

of this AD, unless already accomplished.

To prevent failure of the ground inhibit

relay while it is in the energized position

caused by the current design, which could

result in failure of the stall warning system

and possible loss of control of the airplane

in certain situations if the crew was not

aware that the system had failed, accomplish

the following:

(a) Remove the ground inhibit time delay

and the ground test relay from the stall

warning and protection system, and rewire

part of the stall warning and protection

system to assure that system reliance is

maintained after relay removal. Accomplish

these actions in accordance with the

ACCOMPLISHMENT INSTRUCTIONS

section of British Aerospace Jetstream Alert

Service Bulletin 27–A–JM7847, dated

December 24, 1997.

(b) 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.

(c) An alternative method of compliance or

adjustment of the compliance time that

provides an equivalent level of safety may be

approved by the Manager, Small Airplane

Directorate, Aircraft Certification Service,

1201 Walnut, suite 900, Kansas City,

Missouri 64106. The request shall be

forwarded through an appropriate FAA

Maintenance Inspector, who may add

comments and then send it to the Manager,

Small Airplane Directorate.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the Small Airplane

Directorate.

(d) Questions or technical information

related to British Aerospace Jetstream Alert

Service Bulletin 27–A–JM7847, dated

December 24, 1997, should be directed to

British Aerospace Regional Aircraft,

Prestwick International Airport, Ayrshire,

KA9 2RW, Scotland; telephone: (01292)

479888; facsimile: (01292) 479703. This

service information may be examined at the

FAA, Central Region, Office of the Regional

Counsel, Room 1558, 601 E. 12th Street,

Kansas City, Missouri 64106.

Note 3: The subject of this AD is addressed

in British Aerospace Jetstream Alert Service

Bulletin 27–A–JM7847, dated December 24,

1997. This service bulletin is classified as

mandatory by the United Kingdom Civil

Aviation Authority (CAA).

Issued in Kansas City, Missouri, on April

23, 1998.

Marvin R. Nuss,

Acting Manager, Small Airplane Directorate,

Aircraft Certification Service.

[FR Doc. 98–11438 Filed 4–29–98; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 98–ANE–06–AD]

Airworthiness Directives; Rolls-Royce,

plc Viper Series Turbojet 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

Rolls-Royce, plc Viper series turbojet

engines. This proposal would require a

one-time visual inspection of the

barometric flow control unit (BFCU)

augmentor and bypass valve joint

washer for joint washer integrity, and

replacement, if necessary, with

serviceable parts. This proposal is

prompted by a report of a high pressure

fuel leak at the BFCU augmentor and

bypass valve assembly joint, washer

interface. The actions specified by the

proposed AD are intended to prevent a

high pressure fuel leak, which could

result in an engine nacelle fire and

damage to the aircraft.

DATES: Comments must be received by

June 1, 1998.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), New England

Region, Office of the Regional Counsel,

Attention: Rules Docket No. 98–ANE–

06–AD, 12 New England Executive Park,

Burlington, MA 01803–5299. Comments

may also be submitted to the Rules

Docket by using the following Internet

address: ‘‘9-adengineprop@faa.dot.gov’’. Comments

may be inspected at this location

between 8:00 a.m. and 4:30 p.m.,

Monday through Friday, except Federal

holidays.

The service information referenced in

the proposed rule may be obtained from

Rolls-Royce, plc, Technical Publications

Department CLS–4, P.O. Box 3, Filton,

Bristol, BS34 7QE England; telephone

117–979–1234, fax 117–979–7575. This

information may be examined at the

FAA, New England Region, Office of the

Regional Counsel, 12 New England

Executive Park, Burlington, MA.

FOR FURTHER INFORMATION CONTACT:

James Lawrence, Aerospace Engineer,

Engine Certification Office, FAA, Engine

and Propeller Directorate, 12 New

England Executive Park, Burlington, MA

01803–5299; telephone (781) 238–7176,

fax (781) 238–7199.