### Commercial Airplane Group 

# 777 Service Bulletin

Number: 777-23-0057 

## Summary Date: April 9, 1998 ATA System: 2339

SUBJECT:COMMUNICATIONS - PASSENGER ADDRESS AND ENTERTAINMENT - CABIN MANAGEMENT SYSTEM - CABIN SYSTEM CONTROL PANEL WIRE CHANGE
BACKGROUND This service bulletin gives instructions to correct a connection between cabin system control panel (CSCP) and cabin management terminal (CMT) and to enable CSCP to print to the cabin printer. It was found that two wires were connected incorrectly at the CMT which prevented the CSCP from printing to the cabin printer. ACTION In the purser station, change the termination of two wires at CMT. Do a CMT operational test. COMPLIANCE No compliance time is given. EFFECTIVITY Operator Airplanes SIA WB181 - WB184 INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for airplanes in warranty as of December 1, 1997. Please refer to Paragraph I.F., Industry Support Information. MANPOWER Total Man-hours Elapsed Time (Hours) 1.75 1.75 MATERIAL INFORMATION None

BOEING COMMERCIAL AIRPLANE GROUP P.O. BOX 3707 SEATTLE, WASHINGTON 98124-2207 Summary Page 1 of 2

### BOEING SERVICE BULLETIN 777-23-0057



### FWD OF TWO WIRES AT THE CABIN CONTROL PANEL CABIN MANAGEMENT TERMINAL CHANGE THE TERMINATION

MAIN ENTRY DOOR 2L 

## PURSER STATIONS40010

Apr 9/98 Summary Page 2 of 2

### Commercial Airplane Group 

# 777 Service Bulletin

Number: 777-23-0057 Date: April 9, 1998 ATA System: 2339

SUBJECT:COMMUNICATIONS - PASSENGER ADDRESS AND ENTERTAINMENT - CABIN MANAGEMENT SYSTEM - CABIN SYSTEM CONTROL PANEL WIRE CHANGE
I. PLANNING INFORMATION A. Effectivity 1. Airplanes Refer to Service Bulletin Index Document D624W001, Part 3 for Airplane Variable Number, Line Number, and Serial Number data. This service bulletin is for the airplanes shown below. IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER SINGAPORE AIRLINES (SIA) WB181-WB184
IDENTIFICATION BY VARIABLE NUMBER WB181-WB184 2. Spares None

Apr 9/98 777-23-0057 Page 1 of 9

### BOEING SERVICE BULLETIN 777-23-0057

B. Reason This service bulletin gives instructions to correct a connection between cabin system control panel (CSCP) and cabin management terminal (CMT) and to enable CSCP to print to the cabin printer. It was found that two wires were connected incorrectly at the CMT which prevented the CSCP from printing to the cabin printer. C. Description In the purser station, change the termination of two wires at CMT. Do a CMT operational test. 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. D. Compliance No compliance time is given. E. 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. The changes specified in this service bulletin also comply with the applicable Joint Airworthiness Requirements (JAR) and are FAA approved as delegated by the Joint Aviation Authorities (JAA). 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. NOTE: Interior arrangements are not evaluated for JAR compliance. 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. F. Industry Support Information Boeing warranty remedies are available for 777 airplanes in warranty as of December 1, 1997. For man-hour and material reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing Product Assurance Contracts.

Apr 9/98 777-23-0057 2

### BOEING SERVICE BULLETIN 777-23-0057

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 0.25 0.25 Change 1 1.00 1.00 Close Access 1 0.25 0.25 Test 1 0.25 0.25 TOTAL FOR EACH AIRPLANE 1.75 1.75 H. Material - Price and Availability None I. Special Tools - Price and Availability None J. Weight and Balance Changes None

Apr 9/98 777-23-0057 3

### BOEING SERVICE BULLETIN 777-23-0057

K. References 1. Existing Data: a. 777 Maintenance Manual (AMM) Subject 23-36-00 b. 777 Wiring Diagram 23-36-41 c. Boeing Standard Wiring Practices Manual (BSWPM) 20-10-11 and 20-10-12 2. Data supplied with this service bulletin: None 3. Installation Drawings: None L. Publications Changed Publication Chapter-Section 777 Wiring Diagram Manual 23-36 M. Electrical Load Data Not changed

Apr 9/98 777-23-0057 4

### BOEING SERVICE BULLETIN 777-23-0057

II. MATERIAL INFORMATION A. Parts Necessary For Each Airplane None B. Parts Necessary to Change Spares None C. Special Tools and Equipment 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 I.K., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available. D. Existing Parts Accountability None

Apr 9/98 777-23-0057 5

### BOEING SERVICE BULLETIN 777-23-0057

BLANK PAGE

Apr 9/98 777-23-0057 6

### BOEING SERVICE BULLETIN 777-23-0057

III. ACCOMPLISHMENT INSTRUCTIONS NOTE: 1. The paragraphs identified with a letter give the general work instructions and the necessary tests. 2. The work instructions are divided into work packages. Man-hours and elapsed time for each 3. Refer to the Boeing Standard Wiring Practices Manuals 20-10-11 and 20-10-12 for the wire installation procedures. 4. Obey all of the warnings and cautions given in the specified manual sections. A. In the passenger compartment, gain access to the cabin management terminal (CMT). B. Change the termination of one wire at CMT as shown in Figure 1. C. Do a CMT operational test as given in 777 AMM 23-36-00. D. Put the airplane back in serviceable condition.

Apr 9/98 777-23-0057 7

### BOEING SERVICE BULLETIN 777-23-0057



### DELETED WIRE OR FORMER ROUTING EXISTING WIRE ADDED WIRE OR NEW ROUTING DM23555B RX TX 

### 35 40 W6943-409RK-22 13 TX 

### 39 RX 

### W6943-409R-22 32 RX



### (J4) DM23673D14 DTR SIG GND



### M23673 CMT W6943-409B-22 W6943-409BK-22 43 42

M23555 CABIN CONTROL PANEL DSR SIG GND



### PURSER STATION
APPLICABLE TO AIRPLANE WB184
REFERENCE: 777 WIRING DIAGRAM 23-61-41S40068

FIGURE 1. CABIN MANAGEMENT TERMINAL WIRE CHANGE Apr 9/98 SHEET 1 OF 2 777-23-0057 8

### BOEING SERVICE BULLETIN 777-23-0057



### DELETED WIRE OR FORMER ROUTING EXISTING WIRE ADDED WIRE OR NEW ROUTING 1

RX TX RX 

### 39 40 TX 

### 35 W6943-409RK-22 13 W6943-409R-22 32 RX



### REFERENCE: 777 WIRING DIAGRAM 23-61-41 PURSER STATION SIG GND DSR 

### 42 43 W6943-409BK-22 W6943-409B-22

M23673 CMT SIG GND DTR 

### 14
DM23673D (J4) M23066 CABIN CONTROL PANEL (PROVISIONAL)DM23066A

APPLICABLE TO AIRPLANES WB181-WB183S40095

The flag note number shown below agrees with the number shown in the flag symbol in the figure. FLAG NOTE NAME PART NUMBER QTY NOTES 1 Wire
-- 4 Wires capped and stowed near DM23066A.

FIGURE 1. CABIN MANAGEMENT TERMINAL WIRE CHANGE Apr 9/98 SHEET 2 OF 2 777-23-0057 9

### Commercial Airplane Group 

# 777 Service Bulletin

Number: 777-23-0057 

## Evaluation Form Date: April 9, 1998 ATA System: 2339 Prepared By: Iftikhar A. Beg

SUBJECT:COMMUNICATIONS - PASSENGER ADDRESS AND ENTERTAINMENT - CABIN MANAGEMENT SYSTEM - CABIN SYSTEM CONTROL PANEL WIRE CHANGE 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: T.J. Taylor, Manager Service Bulletin Engineering Boeing Commercial Airplane Group P.O. Box 3707, Mail Stop 2H-36 Seattle, WA 98124-2207

BOEING COMMERCIAL AIRPLANE GROUP P.O. BOX 3707 SEATTLE, WASHINGTON 98124-2207