Commercial

Airplane

Group

767

Service Bulletin

SPECIAL ATTENTION

Number: 767-23-0160 Summary Date: May 31, 2001

ATA System: 2342

SUBJECT: COMMUNICATIONS - Audio Accessory Unit Replacement

THE BOEING COMMERCIAL AIRPLANE GROUP

RECOMMENDS THAT EACH OPERATOR

EXAMINE THIS SERVICE BULLETIN

IMMEDIATELY.

CONCURRENT REQUIREMENTS

Boeing Component Service Bulletin

285T0001-23-09 is related to the audio accessory

unit.

BACKGROUND

The flight interphone system can be used for

communication between the flight crew and ground

handling and servicing personnel in the nose wheel

well. The audio accessory unit (AAU) is a

component of the flight interphone system.

Flight interphone systems with AAU P/N

285T0001-201 or -301 may not reach its full volume

until two seconds after the push-to-talk (PTT) switch

is keyed on the audio selector panel. This

condition may result in miscommunication and is a

potential safety hazard.

Do the changes in this service bulletin to avoid

potential injury to ground handling and servicing

personnel.

Boeing Service Related Problem (SRP)

767-SRP-23-0070 is related to this service bulletin.

ACTION

On the E2-5 shelf, replace the audio accessory unit.

Do a test of the audio accessory unit.

EFFECTIVITY

Operator Group Airplanes

ANZ Group 1 VS113

BCT Group 1 VS506-VS507

CAM Group 1 VS308

SBL Group 1 VS497

UAL Group 1 VS102

CUL Group 2 VS274

DAL Group 2 VS273, VS470

LAL Group 3 VS303

COMPLIANCE

No compliance time is given.

INDUSTRY SUPPORT INFORMATION

Boeing warranty remedies are available for

airplanes in warranty as of December 14, 2000

Please refer to Paragraph 2.B., Industry Support

Information.

MANPOWER

Total Elapsed Time

Man-Hours (Hours)

1.5 1.5

The change to the audio accessory unit as given in

the component service bulletin is not included.

767-23-0160

Summary Page 1 of 2
BOEING SERVICE BULLETIN 767-23-0160

MATERIAL INFORMATION

Operator Supplied Parts

FWD

MAIN EQUIPMENT CENTER

ACCESSORY UNIT

REPLACE AUDIO

ON THE E2-5 SHELF,

V52919

May 31, 2001 767-23-0160

Summary Page 2 of 2
Commercial

Airplane

Group

767

Service Bulletin

SPECIAL ATTENTION

Number: 767-23-0160

Date: May 31, 2001

ATA System: 2342

SUBJECT: COMMUNICATIONS - Audio Accessory Unit Replacement

THE BOEING COMMERCIAL AIRPLANE GROUP RECOMMENDS THAT EACH OPERATOR EXAMINE

THIS SERVICE BULLETIN IMMEDIATELY.

1. PLANNING INFORMATION

A. Effectivity

1. Airplanes

Refer to Service Bulletin Index Document D624T001, Part 3 for Airplane Variable Number, Line

Number, and Serial Number data.

This service bulletin is for the airplanes shown below.

Airplane Models:

767-300

IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER

AIR NEW ZEALAND (ANZ)

1 VS113

BALAIR/CTA LEISURE LTD. (BCT)

1 VS506-VS507

CAMEROON AIRLINES (CAM)

1 VS308

CHINA UNITED AIRLINES (CUL)

2 VS274

DELTA AIR LINES (DAL)

2 VS273 VS470

LAUDA AIR (LAL)

3 VS303

SOBELAIR (SBL)

1 VS497

May 31, 2001 767-23-0160

Page 1 of 11
BOEING SERVICE BULLETIN 767-23-0160

UNITED AIRLINES (UAL)

1 VS102

IDENTIFICATION BY VARIABLE NUMBER

GROUP 1

VS102 VS113 VS308 VS497 VS506-VS507

GROUP 2

VS273-VS274 VS470

GROUP 3

VS303

2. Spares Affected

Examine your spares supply for the parts identified in Paragraph 2.E., Existing Parts

Accountability. If any parts are found, refer to Paragraph 2.E. for the recommended use.

May 31, 2001 767-23-0160

2
BOEING SERVICE BULLETIN 767-23-0160

B. Concurrent Requirements

Boeing Component Service Bulletin 285T0001-23-09 is related to the audio accessory unit.

C. Reason

The flight interphone system can be used for communication between the flight crew and ground

handling and servicing personnel in the nose wheel well. The audio accessory unit (AAU) is a

component of the flight interphone system.

Flight interphone systems with AAU P/N 285T0001-201 or -301 may not reach its full volume until

two seconds after the push-to-talk (PTT) switch is keyed on the audio selector panel. This condition

may result in miscommunication and is a potential safety hazard.

Do the changes in this service bulletin to avoid potential injury to ground handling and servicing

personnel.

Boeing Service Related Problem (SRP) 767-SRP-23-0070 is related to this service bulletin.

D. Description

On the E2-5 shelf, replace the audio accessory unit. Do a test of the audio accessory unit.

The airplane effectivity is divided in three groups because of differences in equipment requirement.

The changes in this service bulletin will not change the Engine Indication and Crew Alerting System

(EICAS).

An evaluation form is attached to this service bulletin. Please use this form to tell us what you think

of the quality of this service bulletin.

E. Compliance

No compliance time is given.

F. Approval

This service bulletin was examined by the Federal Aviation Administration (FAA). The changes

specified in this service bulletin comply with the applicable Federal Aviation Regulations (FAR) and

are FAA approved. This service bulletin and the FAA approval were based on the airplane in its

original Boeing delivery configuration or as modified by other FAA approved Boeing changes.

If an airplane has a non-Boeing modification or repair that affects a component or system also

affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory

agency approval before incorporating this service bulletin.

May 31, 2001 767-23-0160

3
BOEING SERVICE BULLETIN 767-23-0160

G. Manpower

The table below shows an estimate of the man-hours necessary to do this change for each airplane.

This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator

man-hour data if necessary. The estimate does not include lost time. These are some examples of

lost time:

- Time to adjust to the workplace

- Time to schedule the work

- Time to examine the work

- Time to cure the materials

- Time to make the parts

- Time to find the tools.

Task Number of Persons Man-Hours Elapsed Time (Hours)

Open Access 1 0.50 0,50

Change 1 0.25 0.25

Close Access 1 0.50 0.50

Test 1 0.25 0.25

TOTAL FOR EACH AIRPLANE 1.50 1.50

The change to the audio accessory unit as given in the Boeing Component Service Bulletin

285T0001-23-09 is not included.

H. Weight and Balance Changes

None

I. Electrical Load Data

Not changed

May 31, 2001 767-23-0160

4
BOEING SERVICE BULLETIN 767-23-0160

J. References

1. Existing Data:

a. Service Related Problem (SRP) 767-SRP-23-0070

b. 767 Maintenance Manual (AMM) Subject 23-42-01, 24-22-00

c. Boeing Component Service Bulletin 285T0001-23-09, "Communications - Audio Accessory Unit

Modification"

2. Data supplied with this service bulletin

None

3. Installation Drawings Used in the Preparation of This Service Bulletin:

None

K. Publications Changed

Publication Chapter-Section

767 Wiring Diagram Manual Equipment List

767 Maintenance Manual 23-42, 23-51

767 Fault Isolation Manual 23-42, 23-51

L. Interchangeability and Intermixability of Parts

Refer to Paragraph 2.E., Existing Parts Accountability, for interchangeability and intermixability

information.

May 31, 2001 767-23-0160

5
BOEING SERVICE BULLETIN 767-23-0160

BLANK PAGE

May 31, 2001 767-23-0160

6
BOEING SERVICE BULLETIN 767-23-0160

2. MATERIAL INFORMATION

A. Material - Price and Availability

The operator can supply the parts and materials shown in Paragraph 2.C., Parts Necessary For Each

Airplane. As an alternative, operators can purchase the parts from Boeing Spares. This service

bulletin does not show the Boeing price and supply data.

B. Industry Support Information

Boeing warranty remedies are available for 767 airplanes in warranty as of December 14, 2000. For

man-hour and material reimbursement for airplanes in warranty as of that date, send a warranty claim

to Boeing Product Assurance Contracts.

C. Parts Necessary For Each Airplane

1. Kits:

None

2. Parts and Materials Supplied by the Operator:

QTY Part Number {Specification} Name

1 285T0001-205 (Mod A) (a) Audio Accessory Unit (Group 1 airplanes)

1 285T0001-206 (Mod A) (a) Audio Accessory Unit (Group 2 airplanes)

1 285T0001-302 (a) Audio Accessory Unit (Group 3 airplanes)

(a) Boeing Component Service Bulletin 285T0001-23-09 modifies the existing audio

accessory unit to the part numbers shown above.

D. Parts Necessary to Change Spares

None

May 31, 2001 767-23-0160

7
BOEING SERVICE BULLETIN 767-23-0160

E. Existing Parts Accountability

The parts shown below are changed as shown in this service bulletin. Quantity (QTY) is the number

of parts changed on each airplane.

Existing Part Number RUC Name QTY New Part Number PNC RC

285T0001-201 (a) (b) RW1 Audio Accessory Unit 1 285T0001-205 (Mod A)

(a)

S A

285T0001-206 (Mod A)

(b)

S A

285T0001-301 (c) RW1 Audio Accessory Unit 1 285T0001-302 (c) S A

(a) For Group 1 airplanes

(b) For Group 2 airplanes

(c) For Group 3 airplanes

RUC Recommended Use Code

RW1 - Make the change given in Boeing Component Service Bulletin 285T0001-23-09

PNC Part Number Code

S - This is the part number for the new equivalent or replacement part.

- To get a new part, use this part number in your order.

- This part is used in production.

RC Replacement Code

A - Do not use the existing part to replace the new or changed part.

F. Special Tooling - Price and Availability

None

G. Special Tooling Necessary to do this Service Bulletin

No special tools or equipment are necessary to do the change in this service bulletin. But,

maintenance and overhaul tools in the manuals given in Paragraph 1.J., References, can be

necessary. Examine operator tool supply to make sure all necessary tools are available.

May 31, 2001 767-23-0160

8
BOEING SERVICE BULLETIN 767-23-0160

3. ACCOMPLISHMENT INSTRUCTIONS

GENERAL NOTES

1. The paragraphs identified with a letter give the general work instructions and the necessary tests.

The instructions identified with numbers on the figures give the recommended sequence of steps.

2. Obey all of the warnings and cautions given in the specified manual sections.

WORK INSTRUCTIONS

A. Open these circuit breakers and attach DO-NOT-CLOSE tags:

Location

Panel Position Name

P11 C22 PASS ADRS

C23 INTERPHONE CABIN/SERVICE

C25 INTERPHONE FLT AMPL DUAL PWR CAPT

C26 INTERPHONE DUAL PWR F/O OBS

G29 INTERPHONE CAPT FLT AMPL DUAL PWR

G30 INTERPHONE F/O OBS DUAL PWR

B. On the E2-5 shelf, replace the audio accessory unit as shown in Figure 1.

C. Remove DO-NOT-CLOSE tags and close these circuit breakers:

Location

Panel Position Name

P11 C22 PASS ADRS

C23 INTERPHONE CABIN/SERVICE

C25 INTERPHONE FLT AMPL DUAL PWR CAPT

C26 INTERPHONE DUAL PWR F/O OBS

G29 INTERPHONE CAPT FLT AMPL DUAL PWR

G30 INTERPHONE F/O OBS DUAL PWR

D. Supply power to airplane circuits as given in 767 AMM 24-22-00/201.

E. Do a test of the audio accessory unit as given in 767 AMM 23-42-01/401.

F. Put the airplane back to a serviceable condition.

May 31, 2001 767-23-0160

9
BOEING SERVICE BULLETIN 767-23-0160

FIGURE TABLE OF CONTENTS

Title Page

FIGURE 1. E2-5 SHELF - AUDIO ACCESSORY UNIT REPLACEMENT . . . . . . . . . . . . 11

May 31, 2001 767-23-0160

10
BOEING SERVICE BULLETIN 767-23-0160

1 2

FWD

E2-5 SHELF

MAIN EQUIPMENT CENTER

V52920

The step numbers shown below agree with the numbers shown in the circle symbols in the figure.

STEP TASK NAME PART NUMBER QTY NOTES

1 Remove Audio Accessory

Unit

285T0001-201 1 For Group 1 and Group 2

airplanes

285T0001-301 For Group 3 airplane

767 AMM 23-42-01/401

2 Install Audio Accessory

Unit

285T0001-205 (Mod

A)

1 For Group 1 airplanes

285T0001-206 (Mod

A)

For Group 2 airplanes

285T0001-302 For Group 3 airplane

767 AMM 23-42-01/401

FIGURE 1. E2-5 SHELF - AUDIO ACCESSORY UNIT REPLACEMENT

May 31, 2001 SHEET 1 OF 1 767-23-0160

11

Commercial

Airplane

Group

767

Service Bulletin

Number: 767-23-0160 Evaluation Form Date: May 31, 2001

ATA System: 2342

Prepared By: Richard Conde

SUBJECT: COMMUNICATIONS - Audio Accessory Unit Replacement

Use this evaluation form to tell us what you think of the quality of this service bulletin. We will use the data

that you give us to improve the quality of our service bulletins.

NOTE: Please do not use this evaluation form to tell us to make changes to your manuals. To make these

changes, please use a Publication Change Request (PCR) form.

Please give us this data:

(If necessary, please use the other side. Thank you for the time you used to give us your comments.)

OPERATOR: TODAY'S DATE:

PREPARED BY: TITLE:

ORGANIZATION: TELEX CODE:

TELEPHONE NUMBER: BASE:

Please rate the quality of this service bulletin: (good) 4321 (poor)

Please rate the quality of the illustrations: (good) 4321 (poor)

Will you do the change given by this service bulletin? Yes No If not, please explain:

Is this service bulletin easy to understand? Yes No If not, please explain:

Is this service bulletin easy to use? Yes No If not, please explain:

Are the Planning Information, Material Information, and

Accomplishment Instructions accurate? Yes No If not, please explain:

Is the Manpower estimate accurate? Yes No If not, please explain:

Give the completed evaluation form to your Boeing Field Service Representative or send the evaluation form

directly to this address:

Manager

Service Bulletin Engineering

Boeing Commercial Airplane Group

P.O. Box 3707, Mail Stop 2H-37

Seattle, WA 98124-2207