Federal Register / Vol. 61, No. 109 / Wednesday, June 5, 1996 / Proposed Rules

we may defer the claim only if you agree to

continue to care for the crop. We will then

make another appraisal when you notify us

of further damage or that harvest is general

in the area unless you harvested the crop, in

which case we will use the harvested

production. If you do not continue to care for

the crop, our appraisal made prior to

deferring the claim will be used to determine

the production to count; and

(2) All harvested production from the

insurable acreage.

(d) Any citrus fruit that is not marketed as

fresh fruit and, due to insurable causes, does

not contain 120 or more gallons of juice per

ton, will be adjusted by:

(1) Dividing the gallons of juice per ton

obtained from the damaged citrus by 120;

and

(2) multiplying the result by the number of

tons of such citrus.

If individual records of juice content are

not available, an average juice content from

the nearest juice plant will be used, if

available. If not available, a field appraisal

will be made to determine the average juice

content.

(e) Where the actuarial table provides for,

and you elect, the fresh fruit option, citrus

fruit that is not marketable as fresh fruit due

to insurable causes will be adjusted by:

(1) Dividing the value per ton of the

damaged citrus by the price of undamaged

citrus fruit; and

(2) Multiplying the result by the number of

tons of such citrus fruit,

The applicable price for undamaged citrus

fruit will be the local market price the week

before damage occurred.

(f) Any production will be considered

marketed or marketable as fresh fruit unless,

due solely to insured causes, such

production was not marketed as fresh fruit.

(g) In the absence of acceptable records of

disposition of harvested citrus fruit, the

disposition and amount of production to

count for the unit will be the guarantee on

the unit.

(h) Any citrus fruit on the ground that is

not harvested will be considered totally lost

if damaged by an insured cause.

13. Written Agreements

Designated terms of this policy may be

altered by written agreement. The following

conditions will apply:

(a) You must apply in writing for each

written agreement no later than the sales

closing date, except as provided in paragraph

(e) of this section.

(b) The application for written agreement

must contain all terms of the contract

between you and us that will be in effect if

the written agreement is not approved.

(c) If approved, the written agreement will

include all variable terms of the contract,

including, but not limited to, crop type or

variety, the guarantee, premium rate, and

price election.

(d) Each written agreement will only be

valid for 1 year. If the written agreement is

not specifically renewed the following year,

insurance coverage for subsequent crop years

will be in accordance with the printed

policy.

(e) An application for written agreement

submitted after the sales closing date may be

approved if, after a physical inspection of the

acreage, it is determined that no loss has

occurred and the crop is insurable in

accordance with the policy and written

agreement provisions.

Signed in Washington, D.C., on May 23,

1996.

Kenneth D. Ackerman,

Manager, Federal Crop Insurance

Corporation.

[FR Doc. 96-13590 Filed 6-4-96; 8:45 am]

BILLING CODE 3410-FA-P

DEPARTMENT OF ENERGY

Office of Energy Efficiency and

Renewable Energy

10 CFR Part 430

Energy Conservation Program for

Consumer Products: Public Workshop

on the Rulemaking Priority Setting for

the Appliance Standards Rulemaking

Process

28517

and Renewable Energy, Forrestal

Building, Mail Station EE-43, 1000

Independence Avenue SW.,

Washington, DC 20585-0121, (202)

586-0371

Douglas W. Smith, U.S. Department of

Energy, Office of General Counsel,

Forrestal Building, Mail Station GC70, 1000 Independence Avenue SW.,

Washington, DC 20585-0103, (202)

586-3410

Deborah E. Miller, U.S. Department of

Energy, Office of Energy Efficiency

and Renewable Energy, Forrestal

Building, Mail Station EE-l, 1000

Independence Avenue SW.,

Washington, DC 20585-0121, (202)

586-8888.

SUPPLEMENTARY INFORMATION: The

Department has initiated a

comprehensive process improvement

effort to examine, through a series of

stakeholder meetings and interviews,

issues surrounding the appliance

standards program. A workshop was

held on March 19-20 , 1996 , to discuss

AGENCY: Office of Energy Efficiency and the initial findings from these meetings

Renewable Energy, Department of and interviews. Discussion topics

Energy. included the planning and prioritization

ACTION: Notice of public workshop. process, data collection and analysis,

SUMMARY : The Department of Energy and decision making criteria. A

(the Department or DOE) will hold a preliminary draft report of the "Interim

public workshop to discuss rulemaking Results of the Appliance Rulemaking

priority setting for the appliance Process Improvement Effort" dated

standards rulemaking process. The April 26, 1996, was circulated for

Department is developing a straw man review.

list prioritizing the appliance standards March Based on the

workshop and

rang discussed

addressed itthe rulemakings for stakeholder review and sed in the

comment. The Department will discuss preliminary draft report, the Department

issues that should be considered in has developed a straw man list

determining the rulemaking priority and prioritizing the appliance standards

the order of priority proposed in the rulemakings for stakeholder review and

straw man listing. In addition, there comment.

may be other issues the participants will The Department will be holding a

want to address. All persons are hereby workshop on June 14, 1996, at the

given notice of the opportunity to attend Embassy Row Hotel in Washington D.C.

the public workshop. to discuss issues that should be

considered DATES : The public workshop will be rulemaking determining athhe the

order of held on Friday, June 14, 1996, from 9:00 priority proposed in andthe straw man a.m. to 4:30 p.m. priority

listing. The finalized priority listing will ADDRESSES : The workshop will be held be published in the Department's

at the Embassy Row Hotel, 2015 Regulatory Agenda which will be issued

Massachusetts Avenue NW., in October 1996.

Washington DC 20036, (202) 265-1600. The workshop will be professionally

Copies of the straw man listing of facilitated to encourage discussion and

appliance standards rulemakings and comments on the topics.

this notice may be viewed at the DOE Copies of the straw man listing and

Freedom of Information Reading Room, this notice are available in the DOE

Forrestal Building, Room 1E-190, 1000 Freedom of Information Reading Room.

Independence Avenue SW., A copy of the workshop transcript will

Washington, DC 20585, (202) 586-6020 be available in the DOE public reading

between the hours of 9 a.m. and 4 p.m. room approximately 10 days after the

Monday through Friday, except Federal workshop.

holidays. The straw man listing will be sent to

FOR FURTHER INFORMATION CONTACT: all participants that notify the

Bryan Berringer, U.S. Department of Department in advance that they will

Energy, Office of Energy Efficiency attend and to other interested parties

 EE-PI-96-001 COMMENT 58

Federal Register / Vol. 61, No. 109 / Wednesday, June 5, 1996 / Proposed Rules 28517 

we may defer the claim only if you agree to 

continue to care for the crop. We will then 

make another appraisal when you notify us 

of further damage or that harvest is general 

in the area unless you harvested the crop, in 

which case we will use the harvested 

production. If you do not continue to care for 

the crop, our appraisal made prior to 

deferring the claim will be used to determine 

the production to count; and 

(2) All harvested production from the 

insurable acreage. 

(d) Any citrus fruit that is not marketed as 

fresh fruit and, due to insurable causes, does 

not contain 120 or more gallons of juice per 

ton, will be adjusted by: 

(1) Dividing the gallons of juice per ton 

obtained from the damaged citrus by 120; 

and 

(2) multiplying the result by the number of 

tons of such citrus. 

If individual records of juice content are 

not available, an average juice content from 

the nearest juice plant will be used, if 

available. If not available, a field appraisal 

will be made to determine the average juice 

content. 

(e) Where the actuarial table provides for, 

and you elect, the fresh fruit option, citrus 

fruit that is not marketable as fresh fruit due 

to insurable causes will be adjusted by: 

(1) Dividing the value per ton of the 

damaged citrus by the price of undamaged 

citrus fruit; and 

(2) Multiplying the result by the number of 

tons of such citrus fruit. 

The applicable price for undamaged citrus 

fruit will be the local market price the week 

before damage occurred. 

(f) Any production will be considered 

marketed or marketable as fresh fruit unless, 

due solely to insured causes, such 

production was not marketed as fresh fruit. 

(g) In the absence of acceptable records of 

disposition of harvested citrus fruit, the 

disposition and amount of production to 

count for the unit will be the guarantee on 

the unit. 

(h) Any citrus fruit on the ground that is 

not harvested will be considered totally lost 

if damaged by an insured cause. 

13. Written Agreements 

Designated terms of this policy may be 

altered by written agreement. The following 

conditions will apply: 

(a) You must apply in writing for each 

written agreement no later than the sales 

closing date, except as provided in paragraph 

(e) of this section. 

(b) The application for written agreement 

must contain all terms of the contract 

between you and us that will be in effect if 

the written agreement is not approved. 

(c) If approved, the written agreement will 

include all variable terms of the contract, 

including, but not limited to, crop type or 

variety, the guarantee, premium rate, and 

price election. 

(d) Each written agreement will only be 

valid for 1 year. If the written agreement is 

not specifically renewed the following year, 

insurance coverage for subsequent crop years 

will be in accordance with the printed 

policy. 

(e) An application for written agreement 

submitted after the sales closing date may be 

approved if, after a physical inspection of the 

acreage, it is determined that no loss has 

occurred and the crop is insurable in 

accordance with the policy and written 

. agreement provisions. 

Signed in Washington, D.C., on May 23, 

1996. 

Kenneth D. Ackerman, 

Manager, Federal Crop Insurance 

Corporation. 

[FR Doc. 96-13590 Filed 6-4-96; 8:45 am] 

BILLING CODE 341o-FA-P 

DEPARTMENT OF ENERGY 

Office of Energy Efficiency and 

Renewable Energy 

10 CFR Part 430 

Energy Conservation Program for 

Consumer Products: Public Workshop 

on the Rulemaking Priority Setting for 

the Appliance Standards Rulemaking 

Process 

AGENCY: Office of Energy Efficiency and 

Renewable Energy, Department of 

Energy. 

ACTION: Notice of public workshop. 

SUMMARY: The Department of Energy 

(the Department or DOE) will hold a 

public workshop to discuss rulemaking 

priority setting for the appliance 

standards rulemaking process. The 

Department is developing a straw man 

list prioritizing the appliance standards 

rulemakings for stakeholder review and 

comment. The Department will discuss 

issues that should be considered in 

determining the rulemaking priority and 

the order of priority proposed in the 

straw man listing. In addition, there 

may be other issues the participants will 

want to address. All persons are hereby 

given notice of the opportunity to attend 

the public workshop. 

DATES: The public workshop will be 

held on Friday, June 14, 1996, from 9:00 

a.m. to 4:30 p.m. 

ADDRESSES: The workshop will be held 

at the Embassy Row Hotel, 2015 

Massachusetts Avenue NW., 

Washington DC 20036, (202) 265-1600. 

Copies of the straw man listing of 

appliance standards rulemakings and 

this notice may be viewed at the DOE 

Freedom of Information Reading Room, 

Forrestal Building, Room lE-190, 1000 

Independence Avenue SW., 

Washington, DC 20585, (202) 586-6020 

between the hours of 9 a.m. and 4 p.m. 

Monday through Friday, except Federal 

holidays. 

FOR FURTHER INFORMATION CONTACT: 

Bryan Berringer, U.S. Department of 

Energy, Office of Energy Efficiency 

and Renewable Energy, Forrestal 

Building, Mail Station EE-43, 1000 

Independence Avenue SW., 

Washington, DC 20585-0121, (202) 

586-0371 

Douglas W. Smith, U.S. Department of 

Energy, Office of General Counsel, 

Forrestal Building, Mail Station GC70,1000 Independence Avenue SW., 

Washington, DC 20585-0103, (202) 

586-3410 

Deborah E. Miller, U.S. Department of 

Energy, Office of Energy Efficiency 

and Renewable Energy, Forrestal 

Building, Mail Station EE-l, 1000 

Independence Avenue SW., 

Washington, DC 20585-0121, (202) 

586-8888. 

SUPPLEMENTARY INFORMATION: The 

Department has initiated a 

comprehensive process improvement 

effort to examine, through a series of 

stakeholder meetings and interviews, 

issues surrounding the appliance 

standards program. A workshop was 

held on March 19-20, 1996, to discuss 

the initial findings from these meetings 

and interviews. Discussion topics 

included the planning and prioritization 

process, data collection and analysis, 

and decision making criteria. A 

preliminary draft report of the "Interim 

Results of the Appliance Rulemaking 

Process Improvement Effort" dated 

April 26, 1996, was circulated for 

review. 

Based on the criteria discussed in the 

March workshop and addressed in the 

preliminary draft report, the Department 

has developed a straw man list 

prioritizing the appliance standards 

rulemakings for stakeholder review and 

comment. 

The Department will be holding a 

workshop on June 14, 1996, at the 

Embassy Row Hotel in Washington D.C. 

to discuss issues that should be 

considered in determining the 

rulemaking priority and the order of 

priority proposed in the straw man 

listing. The finalized priority listing will 

be published in the Department's 

Regulatory Agenda which will be issued 

in October 1996. 

The workshop will be professionally 

facilitated to encourage discussion and 

comments on the topics. 

Copies of the straw man listing and 

this notice are available in the DOE 

Freedom of Information Reading Room. 

A copy of the workshop transcript will 

be available in the DOE public reading 

room approximately 10 days after the 

workshop. 

The straw man listing will be sent to 

all participants that notify the 

Department in advance that they will 

attend and to other interested parties 
28518 Federal Register / Vol. 61, No. 109 / Wednesday, June 5, 1996 / Proposed Rules

requesting this listing. The Department

welcomes written comments on the

proposed priority list. Written

comments on the proposed priority list

must be received by July 26, 1996.

Please notify Bryan Berringer at the

above listed address of your intention to

attend the workshop or if you expect to

provide written comments.

Issued in Washington, DC on May 28,

1996.

Christine A. Ervin,

Assistant Secretary, Energy Efficiency and

Renewable Energy.

[FR Doc. 96-13904 Filed 6-4-96; 8:45 am]

BILLING CODE 6450-01-P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 96-NM-81-AD]

RIN 2120-AA64

Airworthiness Directives ; Allied Signal

Commercial Avionics Systems CAS-81

Traffic Alert and Collision Avoidance

Systems (TCAS) as Installed In, But

Not Limited To, Various Transport

Category Airplanes

AGENCY : Federal Aviation

Administration, DOT.

ACTION : Notice of proposed rulemaking

(NPRM).

SUMMARY : This document proposes to

revise an existing airworthiness

directive (AD), applicable to various

transport category airplanes equipped

with Allied Signal Commercial Avionics

Systems CAS-81 TCAS. That AD

currently requires a revision to the

Airplane Flight Manual (AFM) to

provide the flightcrew with procedures

to cycle power to the TCAS processor

via the circuit breaker or power bus, and

to perform a TCAS functional test to

verify proper operation of the TCAS.

That action was prompted by reports of

failure of the audio output of the CAS81 TCAS. The actions specified by that

AD are intended to ensure that the

flightcrew is advised of the potential

hazard associated with failure of the

audio output of the CAS-81 TCAS, and

of the procedures necessary to address

it. This action would add a revision of

the AFM requirements that would

provide an alternative method of

compliance with the currently required

AFM revision; and would provide for a

modification to the TCAS processor,

which, if accomplished, terminates the

requirements of the AD.

DATES : Comments must be received by

July 15, 1996.

ADDRESSES : Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, ANM-103,

Attention: Rules Docket No. 96-NM81-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

Allied Signal Aerospace, Technical

Publications, Dept. 65-70, P.O. Box

52170, Phoenix, Arizona 85072-2170.

This information may be examined at

the FAA, Transport Airplane

Directorate, 1601 Lind Avenue, SW.,

Renton, Washington.

FOR FURTHER INFORMATION CONTACT:

David Crew, Aerospace Engineer,

Systems and Flight Test Branch, ACE116A, FAA, Atlanta Aircraft

Certification Office, Small Airplane

Directorate, Campus Building, 1701

Columbia Avenue, Suite 2-160, College

Park, Georgia 30337-2748; telephone

(404) 305-7335; fax (404) 305-7348.

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 96-NM-81-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.

96-NM-81-AD, 1601 Lind Avenue,

SW., Renton, Washington 98055-4056.

Discussion

On January 22, 1996, the FAA issued

AD 95-26-15, amendment 39-9495 (61

FR 2699, January 29, 1996), applicable

to various transport category airplanes

equipped with Allied Signal

Commercial Avionics Systems CAS-81

Traffic Alert and Collision Avoidance

Systems (TCAS). That AD requires a

revision to the FAA-approved Airplane

Flight Manual (AFM) to provide the

flightcrew with procedures to cycle

power to the TCAS processor via the

circuit breaker or power bus, and to

perform a TCAS functional test to verify

proper operation of the TCAS. That

action was prompted by reports of

failure of the audio output of the CAS81 TCAS. The requirements of that AD

are intended to ensure that the

flightcrew is advised of the potential

hazard associated with failure of the

audio output of the CAS-81 TCAS, and

of the procedures necessary to address

it.

Explanation of New Service

Information

Since the issuance of that AD, Allied

Signal has issued Service Bulletin TPA8lA-34-82, dated January 1996, which

describes procedures for a modification

(Unit Mod 13) of the TPA-81A TCAS

processor receiver. This modification

adds two 100k ohm resistors to circuitry

on the voice synthesizer module (VSM)

to provide a direct current (DC) return

for the Op-Amp. Additionally, the

modification adds four diodes to the

ADV. INHIBIT #1, #2, #3, and #4 lines

(advisory inhibit) at connector P3011 for

isolation. This modification will

eliminate audio noise and prevent a lack

of AUDIO alert due to the absence of a

return path to ground in an alternate

current (AC) coupled filter in the VSM.

The modification also will eliminate the

need to isolate diodes of the advisory

inhibit lines in certain configurations.

Allied Signal also issued Service

Bulletin TPA-81A-34-84, dated

January 1996, which describes

procedures for modification of the TPA81A TCAS processor receiver. The

modification involves redesignating

(rolling) the part numbers of processors

modified to Unit Mod 13. This

modification will prevent failure of the

 EE-PI-96-001 COMMENT 58

28518 Federal Register / Vol. 61, No. 109 / Wednesday, June 5, 1996 / Proposed Rules 

requesting this listing. The Department 

welcomes written comments on the 

proposed priority list. Written 

comments on the proposed priority list 

must be received by July 26, 1996. 

Please notify Bryan Berringer at the 

above listed address of your intention to 

attend the workshop or if you expect to 

provide written comments. 

Issued in Washington, DC on May 28, 

1996. 

Christine A. Ervin, 

Assistant Secretary, Energy Efficiency and 

Renewable Energy. 

[FR Doc. 96-13904 Filed 6-4-96; 8:45 am] 

BILLING CODE 64SD-Ol-P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. 96-NM-81-AD] 

RIN 212G-AA64 

Airworthiness Directives; Allied Signal 

Commercial Avionics Systems CAS-81 

Traffic Alert and Collision Avoidance 

Systems (TCAS) as Installed In, But 

Not Limited To, Various Transport 

Category Airplanes 

AGENCY: Federal Aviation 

Administration, DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This document proposes to 

revise an existing airworthiness 

directive (AD), applicable to various 

transport category airplanes equipped 

with Allied Signal Commercial Avionics 

Systems CAS-81 TCAS. That AD 

currently requires a revision to the 

Airplane Flight Manual (AFM) to 

provide the flightcrew with procedures 

to cycle power to the TCAS processor 

via the circuit breaker or power bus, and 

to perform a TCAS functional test to 

verify proper operation of the TCAS. 

That action was prompted by reports of 

failure of the audio output of the CAS81 TCAS. The actions speCified by that 

AD are intended to ensure that the 

flightcrew is advised of the potential 

hazard associated with failure of the 

audio output of the CAS-81 TCAS, and 

of the procedures necessary to address 

it. This action would add a revision of 

the AFM requirements that would 

provide an alternative method of 

compliance with the currently required 

AFM revision; and would provide for a 

modification to the TCAS processor, 

which, if accomplished, terminates the 

reqUirements of the AD. 

DATES: Comments must be received by 

July 15, 1996. 

ADDRESSES: Submit comments in 

triplicate to the Federal Aviation 

. Administration (FAA), Transport 

Airplane Directorate, ANM-103, 

Attention: Rules Docket No. 96-NM81-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 

Allied Signal Aerospace, Technical 

Publications, Dept. 65-70, P.O. Box 

52170, Phoenix, Arizona 85072-2170. 

This information may be examined at 

the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue, SW., 

Renton, Washington. 

FOR FURTHER INFORMATION CONTACT: 

David Crew, Aerospace Engineer, 

Systems and Flight Test Branch, ACE116A, FAA, Atlanta Aircraft 

Certification Office, Small Airplane 

Directorate, Campus Building, 1701 

Columbia Avenue, Suite 2-160, College 

Park, Georgia 30337-2748; telephone 

(404) 305-7335; fax (404) 305-7348. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

Interested persons are invited to 

participate in the making ofthe 

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 96-NM-81-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. 

96-NM-81-AD, 1601 Lind Avenue, 

SW., Renton, Washington 98055-4056. 

Discussion 

On January 22, 1996, the FAA issued 

AD 95-26-15, amendment 39-9495 (61 

FR 2699, January 29, 1996), applicable 

to various transport category airplanes 

equipped with Allied Signal 

Commercial Avionics Systems CAS-81 

Traffic Alert and Collision Avoidance 

Systems (TCAS). That AD reqUires a 

revision to the FAA-approved Airplane 

Flight Manual (AFM) to provide the 

flightcrew with procedures to cycle 

power to the TCAS processor via the 

circuit breaker or power bus, and to 

perform a TCAS functional test to verify 

proper operation of the TCAS. That 

action was prompted by reports of 

failure of the audio output of the CAS81 TCAS. The requirements of that AD 

are intended to ensure that the 

flightcrew is advised of the potential 

hazard associated with failure of the 

audio output of the CAS-81 TCAS, and 

of the procedures necessary to address 

it. 

Explanation of New Service 

Information 

Since the issuance of that AD, Allied 

Signal has issued Service Bulletin TPA81A-34-82, dated January 1996, which 

describes procedures for a modification 

(Unit Mod 13) of the TPA-81A TCAS 

processor receiver. This modification 

adds two lOOk ohm resistors to circuitry 

on the voice syntheSizer module (VSM) 

to provide a direct current (DC) return 

for the Op-Amp. Additionally, the 

modification adds four diodes to the 

ADV. INHIBIT #1, #2, #3, and #4 lines 

(advisory inhibit) at connector P3011 for 

isolation. This modification will 

eliminate audio noise and prevent a lack 

of AUDIO alert due to the absence of a 

return path to ground in an alternate 

current (AC) coupled filter in the VSM. 

The modification also will eliminate the 

need to isolate diodes of the advisory 

inhibit lines in certain configurations. 

Allied Signal also issued Service 

Bulletin TPA-81A-34-84, dated 

January 1996, which describes 

procedures for modification of the TPA81A TCAS processor receiver. The 

modification involves redesignating 

(rolling) the part numbers of processors 

modified to Unit Mod 13. This 

modification will prevent failure of the