This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

21979

Vol. 61, No. 93

Monday, May 13, 1996

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 95–NM–165–AD]

RIN 2120–AA64

Airworthiness Directives; Beech

(Raytheon) Model BAe 125–800A and

–1000A, and Model Hawker 800 and

1000 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 Beech (Raytheon) Model BAe

125–800A and –1000A, and Model

Hawker 800 and 1000 series airplanes.

This proposal would require

modification of the TKS metering pump

in the airframe ice protection system.

This proposal is prompted by a report

that the pump was found fitted with

silver plated wiring. The actions

specified by the proposed AD are

intended to ensure that silver plated

wiring is removed from these pumps;

silver plated wiring carrying a direct

current can ignite the ice protection

fluid (glycol) when exposed to it, which

could result in a possible fire hazard.

DATES: Comments must be received by

June 17, 1996.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, ANM–103,

Attention: Rules Docket No. 95–NM–

165–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

Raytheon Aircraft Company, Manager,

Service Engineering, Hawker Customer

Support Department, P.O. Box 85,

Wichita, Kansas 67201–0085. This

information may be examined at the

FAA, Transport Airplane Directorate,

1601 Lind Avenue, SW., Renton,

Washington.

FOR FURTHER INFORMATION CONTACT: Tim

Backman, Aerospace Engineer,

Standardization Branch, ANM–113,

FAA, Transport Airplane Directorate,

1601 Lind Avenue, SW., Renton,

Washington 98055–4056; telephone

(206) 227–2797; fax (206) 227–1149.

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 95–NM–165–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.

95–NM–165–AD, 1601 Lind Avenue,

SW., Renton, Washington 98055–4056.

Discussion

The Civil Aviation Authority (CAA),

which is the airworthiness authority for

the United Kingdom, recently notified

the FAA that an unsafe condition may

exist on certain Beech (Raytheon) Model

BAe 125–800A and –1000A, and Model

Hawker 800 and 1000 series airplanes.

The CAA has received a report

indicating that, during a design review,

the TKS metering pump in the airframe

ice protection system was found fitted

with silver plated wiring. The TKS

pump pumps the ice protection fluid to

the wing leading edge where it is

excreted through microholes to prevent

ice build up. If silver plated wiring is

bare, or if its insulation is chafed, and

it is carrying a direct current, it can

ignite the ice protection fluid (glycol)

when exposed to it. Such an ignition

could result in a possible fire hazard.

The manufacturer has issued Hawker

Service Bulletin SB.30–61–7676A, dated

February 15, 1995, which describes

procedures for modification of the TKS

pump (Modification 257676A). The

modification involves accomplishing an

inspection to determine if the flying

leads of the TKS pump have silver

plated conductors; replacement of those

leads with ones that do not have silver

plated conductors; and reidentification

of the pump. Accomplishment of this

modification will ensure that silver

plated wiring is removed from the TKS

pump. The CAA classified this service

bulletin as mandatory in order to assure

the continued airworthiness of these

airplanes in the United Kingdom.

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, and

determined that AD action is necessary

for products of this type design that are

certificated for operation in the United

States.

Since an unsafe condition has been

identified that is likely to exist or

develop on other airplanes of the same

type design, the proposed AD would

require modification of the TKS pump.
21980 Federal Register / Vol. 61, No. 93 / Monday, May 13, 1996 / Proposed Rules

The actions would be required to be

accomplished in accordance with the

service bulletin described previously.

The FAA estimates that 23 airplanes

of U.S. registry would be affected by this

proposed AD, that it would take

approximately 1 work hour per airplane

to accomplish the proposed actions, and

that the average labor rate is $60 per

work hour. Based on these figures, the

cost impact of the proposed AD on U.S.

operators is estimated to be $1,380, or

$60 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.

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 USC 106(g), 40113, 44701.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

Beech Aircraft Company (Formerly

DeHavilland; Hawker Siddeley; British

Aerospace, PLC; Raytheon Corporate

Jets, Inc.): Docket 95–NM–165–AD.

Applicability: Model BAe 125–800A and

–1000A, and Model Hawker 800 and 1000

series airplanes; on which Modification

257676A has not been accomplished

(reference Hawker Service Bulletin SB.30–

61–7676A or Aerospace Systems and

Technology Service Bulletin S.B.30–25);

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 (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.

Note 2: Beech (Raytheon) Model BAe 125–

800B and BAe 125–1000B series airplanes are

similar in design to the airplanes that are

subject to the requirements of this AD and,

therefore, also may be subject to the unsafe

condition addressed by this AD. However, as

of the effective date of this AD, those models

are not type certificated for operation in the

United States. Airworthiness authorities of

countries in which the Model BAe 125–800B

and BAe 125–1000B series airplanes are

approved for operation should consider

adopting corrective action, applicable to

those models, that is similar to the corrective

action required by this AD.

Compliance: Required as indicated, unless

accomplished previously.

To ensure that silver plate wiring is

removed from the TKS metering pump and

a possible fire hazard eliminated, accomplish

the following:

(a) Within 3 months after the effective date

of this AD, modify the TKS pump in

accordance with Hawker Service Bulletin

SB.30–61–7676A, dated February 15, 1995.

(b) As of the effective date of this AD, no

person shall install on any airplane a TKS

metering pump, having part number

XA9511E003–3 or XA9511E009, unless it has

been modified in accordance with the

requirements of paragraph (a) of this AD.

(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,

Standardization Branch, ANM–113, 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, Standardization

Branch, ANM–113.

Note 3: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the Standardization Branch,

ANM–113.

(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.

Issued in Renton, Washington, on May 3,

1996.

Darrell M. Pederson,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 96–11825 Filed 5–10–96; 8:45 am]

BILLING CODE 4910–13–P

14 CFR Part 39

[Docket No. 95–CE–39–AD]

RIN 2120—AA64

Airworthiness Directives; H.B.

Flugtechnik GmbH 23/2400 Sailplanes

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 H.B.

Flugtechnik GmbH (Flugtechnik) 23/

2400 sailplanes. The proposed action

would require inspecting the rudder

bearing support bracket for cracks,

replacing the bracket if cracked, and

modifying the bracket with a third bolt

if no cracks are found. Cracks found in

the rudder bearing support brackets

during routine inspections prompted

the proposed action. The actions

specified by the proposed AD are

intended to prevent cracks in the rudder

bearing support bracket, which could

cause loss of control of the rudder and

possible loss of control of the sailplane.

DATES: Comments must be received on

or before July 15, 1996.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Central Region,

Office of the Assistant Chief Counsel,

Attention: Rules Docket No. 95–CE–39–

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 H.B.

Flugtechnik GmbH, attn: Dr. Adolf

Scharf STR, 42 P.F. 74, A–4053, Haid,

Austria. This information also may be

examined at the Rules Docket at the

address below. Send comments on the