### Commercial Airplane Group 

# 767 Service Bulletin

Number: 767-23-0164 

## Summary Date: May 31, 2001 ATA System: 2342

SUBJECT: COMMUNICATIONS - Interphone - Cabin Interphone System - Audio Accessory Unit And Handset Replacement
CONCURRENT REQUIREMENTS For airplane VS303, you cannot make the changes given in this service bulletin unless the changes given in Boeing Service Bulletin 767-23-0160 are made. BACKGROUND This service bulletin gives instructions to replace the pilots' and attendant handsets and, on airplanes VR051-VR057, replace the audio accessory unit (AAU). These changes will prevent handset audio feedback that can occur when the handsets are used. An operator with the new look interior (NLI) configuration reported feedback during handset use. Investigation at Boeing found that when the handset microphone gain is reduced by 3db and the AAU gain is reduced by 9db the audio feedback does not occur. The new handsets and AAU have the reduced gain to prevent handset audio feedback. ACTION(PRR B13023-1) In the flight compartment replace the pilots' handset on the P8 panel. In the passenger cabin, replace 5 attendant handsets. On airplanes VR051-VR057, replace the audio accessory unit (AAU) on the E2-5 shelf in the main equipment center. NOTE: On airplane VS303, the AAU is replaced by Service Bulletin 767-23-0160. Do a system test of the cabin interphone system. EFFECTIVITY Operator Airplanes CAL VR051-VR057 LAL VS303

COMPLIANCE No compliance time is given. INDUSTRY SUPPORT INFORMATION At the time of release of this service bulletin, warranty remedies have not been determined. A subsequent revision or Information Notice will address the warranty remedies available, if any. MANPOWER Total Elapsed Time Airplanes Man-Hours (Hours) VR051-VR057 2.0 1.5 VS303 1.0 1.0 The changes to the AAU and handsets as given in the Boeing Component service bulletins are not included. MATERIAL INFORMATION Operator Supplied Parts/Materials

767-23-0164 Summary Page 1 of 2

### BOEING SERVICE BULLETIN 767-23-0164



### ON AIRPLANES VR051-VR057, REPLACE THE ATTENDANT HANDSET AT FIVE ATTENDANT SEAT LOCATIONS,

REPLACE THE AUDIO ACCESSORY UNIT ON THE E2-5 SHELF HANDSET COMPARTMENT, REPLACE THE PILOTS' ON THE P8 PANEL IN THE FLIGHT

FWD 

### MAIN EQUIPMENT CENTERV52548

May 31, 2001 767-23-0164 Summary Page 2 of 2

### Commercial Airplane Group 

# 767 Service Bulletin

Number: 767-23-0164 Date: May 31, 2001 ATA System: 2342

SUBJECT: COMMUNICATIONS - Interphone - Cabin Interphone System - Audio Accessory Unit And Handset Replacement

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. An equivalent change is on subsequent production airplanes. Refer to PRRB13023-1 for data about this change. Airplane Models: 767-200 767-300 IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER CONTINENTAL AIRLINES (CAL) VR051-VR057 LAUDA AIR (LAL) VS303
IDENTIFICATION BY VARIABLE NUMBER VR051-VR057 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.

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### BOEING SERVICE BULLETIN 767-23-0164

B. Concurrent Requirements For VS303, you cannot make the changes given in this service bulletin unless the changes given in Boeing Service Bulletin 767-23-0160 are made. C. Reason This service bulletin gives instructions to replace the pilots' and attendant handsets and, on airplanes VR051-VR057, replace the audio accessory unit (AAU). These changes will prevent handset audio feedback that can occur when the handsets are used. An operator with the new look interior (NLI) configuration reported feedback during handset use. Investigation at Boeing found that when the handset microphone gain is reduced by 3db and the AAU gain is reduced by 9db the audio feedback does not occur. The new handsets and AAU have the reduced gain to prevent handset audio feedback. D. Description In the flight compartment replace the pilots' handset on the P8 panel. In the passenger cabin, replace 5 attendant handsets. On airplanes VR051-VR057, replace the audio accessory unit (AAU) on the E2-5 shelf in the main equipment center. NOTE: On airplane VS303, the AAU is replaced by Service Bulletin 767-23-0160. Do a system test of the cabin interphone system. 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.

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### BOEING SERVICE BULLETIN 767-23-0164

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. AIRPLANES VR051-VR057

Task Number of Persons Man-Hours Elapsed Time (Hours) Replace AAU 1 0.5 0.5 Replace Handsets 1 0.5 0.5 Test 2 1.0 0.5 TOTAL FOR EACH AIRPLANE 2.0 1.5
AIRPLANE VS303

Task Number of Persons Man-Hours Elapsed Time (Hours) Replace Handsets 1 0.5 0.5 Test 1 0.5 0.5 TOTAL FOR EACH AIRPLANE 1.0 1.0 The change to the AAU as given in Boeing Component Service Bulletin 285T0001-23-09 is not included. The change to the handsets as given in Boeing Component Service Bulletin 285W0024-23-04 is not included. H. Weight and Balance Changes None I. Electrical Load Data Not changed

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### BOEING SERVICE BULLETIN 767-23-0164

J. References 1. Existing Data: a. Engineering Change Memo PRRB13023-1 b. 767 Maintenance Manual (AMM) Subject 23-42-01/401 c. Boeing Standard Overhaul Practices Manual (BSOPM) 20-50-05 d. Boeing Service Bulletin 767-23-0160, "COMMUNICATION - Audio Accessory Unit Replacement" e. Boeing Component Service Bulletin 285T0001-23-09, "COMMUNICATION - Audio Accessory Unit Modification" f. Boeing Component Service Bulletin 285W0024-23-04, "COMMUNICATIONS - Interphone - Cabin Interphone System - Cabin Attendant / Flight Deck Handset Module Assembly - Microphone Gain Reduction" 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 Maintenance Manual 23-42, 23-51 767 Fault Isolation Manual 23-42, 23-51 767 Illustrated Parts Catalog 23-42, 25-71, 31-11
L. Interchangeability and Intermixability of Parts Refer to Paragraph 2.E., Existing Parts Accountability, for interchangeability and intermixability information.

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### BOEING SERVICE BULLETIN 767-23-0164

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, and Paragraph 2.D., Parts Necessary to Change Spares. Refer to Boeing Component Service Bulletins 285T0001-23-09 and 285W0024-23-04. B. Industry Support Information At the time of release of this service bulletin, warranty remedies have not been determined. A subsequent revision or Information Notice will address the warranty remedies available, if any. C. Parts Necessary For Each Airplane 1. Kits: None 2. Parts and Materials Supplied by the Operator: AIRPLANES VR051-VR057 QTY Part Number Name

1 285T0001-302 (a) Audio Accessory Unit (AAU) 5 285W0024-7L (b) Attendant Handset 1 285W0024-8A (b) Pilots' Handset 1 (c) BAC27TEX6744 Dialing Codes Marker (Pilot's Handset) 5 (c) BAC27TEX6745 Dialing Codes Marker (Attendant Handset) (a) To get AAU 285T0001-302, change AAU 285T0001-301 as given in Boeing Component Service Bulletin 285T0001-23-09. (b) To get handsets 285W0024-7L and 285W0024-8A, change handsets 285W0024-1L and 285W0024-4A as given in Boeing Component Service Bulletin 285W0024-23-04 (c) If necessary. Refer to the Accomplishment Instructions. AIRPLANE VS303 QTY Part Number Name

5 285W0024-7H (a) Attendant Handset 1 285W0024-8A (a) Pilots' Handset 1 (b) BAC27TEX6686 Dialing Codes Marker (Pilots' Handset) 5 (b) BAC27TEX6687 Dialing Codes Marker (Attendant Handset) (a) To get handsets 285W0024-7H and 285W0024-8A, change handsets 285W0024-1H and 285W0024-4A as given in Boeing Component Service Bulletin 285W0024-23-04 (b) If necessary. Refer to the Accomplishment Instructions.

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### BOEING SERVICE BULLETIN 767-23-0164

D. Parts Necessary to Change Spares Refer to Boeing Component Service Bulletins 285T0001-23-09 and 285W0024-23-04 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 285T0001-301 (a) RW1 Audio Accessory Unit 1 285T0001-302 S A 285W0024-1L (a) 285W0024-1H (b) RW2 Attendant Handset 5 285W0024-7L (a) 285W0024-7H (b) S A 285W0024-4A RW2 Pilot's Handset 1 285W0024-8A S A (a) Airplanes VR051-VR057 (b) Airplane VS303
RUC Recommended Use Code RW1 - Make the change given in Boeing Component Service Bulletin 285T0001-23-09. RW2 - Make the change given in Boeing Component Service Bulletin 285W0024-23-04. 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.

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### BOEING SERVICE BULLETIN 767-23-0164

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. In the flight compartment, replace the pilot's handset as shown in Figure 1. B. In the passenger cabin, replace the attendant handsets as shown in Figure 2. C. On airplanes VR051-VR057, do these steps to replace the audio accessory unit (AAU): 1. Open these circuit breakers and attach DO-NOT-CLOSE tags: Location (Panel/Position) Name Circuit Breaker P11 / C21 PASS ADRS 2 C00558 P11 / C22 PASS ADRS 1 C00548 P11 / C24 INTERPHONE CABIN C01007 P11 / C25 DUAL PWR INTPH CAPT C01003 P11 / C26 DUAL PWR INTPH F/O C00646 P11 / C29 DUAL PWR INTPH CAPT C01004 P11 / G2 OBSERVER INTPH C01006 P11 / G30 DUAL PWR INTPH F/O C00647 2. In the main equipment center, replace the AAU in the main equipment center as shown in Figure 3. 3. Remove the DO-NOT-CLOSE tags and close these circuit breakers: Location (Panel/Position) Name Circuit Breaker P11 / C21 PASS ADRS 2 C00558 P11 / C22 PASS ADRS 1 C00548 P11 / C24 INTERPHONE CABIN C01007 P11 / C25 DUAL PWR INTPH CAPT C01003 P11 / C26 DUAL PWR INTPH F/O C00646 P11 / C29 DUAL PWR INTPH CAPT C01004 P11 / G2 OBSERVER INTPH C01006 P11 / G30 DUAL PWR INTPH F/O C00647

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### BOEING SERVICE BULLETIN 767-23-0164

D. On airplanes VR051-VR057, do these steps to test the cabin interphone system: NOTE: The functional test given below was included directly from a Boeing functional test document. When the test was included in this service bulletin, the format, text, and step numbers were not changed. There are two numbers associated with each instruction. The number to the left is the sequence number which must be followed when you do the test. The number to the right of it is the "step" number. The step number is the actual number associated with the Boeing functional test document. The step number is referenced when repeat instructions are required within the functional test. 1. STEP 102 CAUTION ELECTRICAL POWER Potential Electrical Power Hazard exists when performing this test. Use applicable Shop procedures as required. 2. STEP 200 Tools and/or Equipment 3. STEP 201 Use the following listed equipment to perform test: - Shop Supply AR Boom Mic 4. STEP 202 VERIFY that test equipment used on this job, but not listed in this section, is documented using the appropriate method for recording non-conformities. 5. STEP 300 References 6. STEP 301 Wiring Diagrams

NUMBER TITLE

-------- ---------------------------------------- 23-31-11 Passenger Address Voice Input Circuitry 23-31-13 Passenger Address Output Circuitry/Controls 23-42-11 Cabin Interphone 23-42-12 Cabin Interphone - Electrical Chime 7. STEP 302 Schematics

NUMBER TITLE

-------- ---------------------------------------- 23-31-10 Passenger Address - Microphone and Input Controls 23-31-30 Passenger Address - Speaker Bus 1 23-31-40 Passenger Address - Speaker Bus 2 23-42-10 Cabin Interphone - Handset Interfaces 23-42-20 Cabin Interphone - Master Call Lights 23-42-30 Cabin Interphone - Chime Outputs 23-42-40 Cabin Interphone - Pilots Call Panel 23-42-50 Cabin Interphone - Flight/Cabin/Service 23-42-60 Cabin Interphone - Passenger Address

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### BOEING SERVICE BULLETIN 767-23-0164

8. STEP 400 General Information 9. STEP 404 Abbreviations and acronyms used in this test: AAU Audio Accessory Unit AR As Required DCU Data Concentrator Unit EICAS Engine Indication and Crew Alerting System LRU Line Replaceable Unit PA Passenger Address PTT Push To Talk 10. STEP 500 START Test Setup 11. STEP 501 ENSURE the following circuit breakers on the P11 panel are closed: (3 ACP/ASP) CB NO. LOC NOMENCLATURE

------ --- ------------------ C00548 C22 PASS. ADRS 1 C00558 C21 PASS. ADRS 2 C01007 C27 INTERPHONE-CABIN C00646 C26 DUAL PWR INTPH F/0 C00647 G30 DUAL PWR INTPH F/O C01003 C25 DUAL PWR INTPH CAPT C01004 C29 DUAL PWR INTPH CAPT C01006 G02 OBSERVER INTPH 12. STEP 502 ENSURE all handsets are securely placed in their cradles. 13. STEP 503 STOP Test Setup 14. STEP 600 START Pilots Call Panel Test 15. STEP 601 DO dial "31" on a FWD attendant handset. NOTE: Ensure attendant handset is left off the cradle until verification of flight deck indications. 16. STEP 602 VERIFY the following: 1. HI chime is heard in the flight deck 2. FWD call button illuminates on the PCP 3. CABIN CALL illuminates on the Audio Control Panels 4. CABIN CALL illuminates on the EICAS computer displays

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### BOEING SERVICE BULLETIN 767-23-0164

17. STEP 603 PRESS the FWD call button on the Pilots Call Panel. 18. STEP 604 VERIFY the following: 1. FWD button extinguishes on the PCP 2. CABIN CALL extinguishes on the Audio Control Panels 3. CABIN CALL extinguishes on the EICAS computer displays 19. STEP 605 PUT the FWD handset back in the cradle. 20. STEP 606 DO dial "31" on the MID attendant handset. NOTE: Ensure attendant handset is left off the cradle until verification of flight deck indications. 21. STEP 607 VERIFY the following: 1. HI chime is heard in the flight deck 2. MID call button illuminates on the PCP 3. CABIN CALL illuminates on the Audio Control Panels 4. CABIN CALL illuminates on the EICAS computer displays 22. STEP 608 PRESS the MID call button on the Pilots Call Panel. 23. STEP 609 VERIFY the following: 1. MID button extinguishes on the PCP 2. CABIN CALL extinguishes on the Audio Control Panels 3. CABIN CALL extinguishes on the EICAS computer displays 24. STEP 610 PUT the MID handset back in the cradle. 25. STEP 611 DO dial "31" on a AFT attendant handset. NOTE: Ensure attendant handset is left off the cradle until verification of flight deck indications. 26. STEP 612 VERIFY the following: 1. HI chime is heard in the flight deck 2. AFT call button illuminates on the PCP 3. CABIN CALL illuminates on the Audio Control Panels 4. CABIN CALL illuminates on the EICAS computer displays 27. STEP 613 PRESS the AFT call button on the Pilots Call Panel.

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### BOEING SERVICE BULLETIN 767-23-0164

28.STEP 614 VERIFY the following: 1. AFT button extinguishes on the PCP 2. CABIN CALL extinguishes on the Audio Control Panels 3. CABIN CALL extinguishes on the EICAS computer displays 29.STEP 615 PUT the AFT handset back in the cradle. 30.STEP 616 DO dial "31" on a FWD attendant handset. NOTE: Ensure attendant handset is left off the cradle until verification of flight deck indications. 31.STEP 617 VERIFY the following: 1. HI chime is heard in the flight deck 2. FWD call button illuminates on the PCP 3. CABIN CALL illuminates on the Audio Control Panels 4. CABIN CALL illuminates on the EICAS computer displays 32.STEP 618 PRESS the CAB button on the CAPT Audio Control Panel. 33.STEP 619 VERIFY the following: 1. FWD button extinguishes on the PCP 2. CABIN CALL extinguishes on the Audio Control Panels 3. CABIN CALL extinguishes on the EICAS computer displays 34.STEP 620 PUT the FWD handset back in the cradle. 35.STEP 621 PRESS the ALERT call button on the Pilots Call Panel 36.STEP 622 VERIFY the following: 1. Three (3) hi/lo chimes are produced by the PA speakers 2. 4 Pink Attnd. call lights flash at FWD ATTENDANT STATIONS 3. 2 Pink Attnd. call lights flash at MID ATTENDANT STATIONS 4. 3 Pink Attnd. call lights flash at AFT ATTENDANT STATIONS 37.STEP 623 DO dial "**" on the FWD-L Attendant handset. 38.STEP 624 VERIFY the following: 1. Three (3) hi/lo chimes are produced by the PA speakers 2. The FWD-L Pink flashing Attnd. call light extinguishes 3. CABIN ALERT illuminates on the EICAS Computer Displays

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### BOEING SERVICE BULLETIN 767-23-0164

39. STEP 625 OPEN the following circuit breaker on the P11 panel: CB NO. LOC NOMENCLATURE

------ --- ------------------------ C01007 C27 INTERPHONE-CABIN 40. STEP 626 VERIFY the flashing Pink Attnd. call lights extinguish. 41. STEP 627 PUT the FWD-L handset back in the cradle. 42. STEP 628 CLOSE the following circuit breaker on the P11 panel: CB NO. LOC NOMENCLATURE

------ --- ------------------------ C01007 C27 INTERPHONE-CABIN 43. STEP 629 PRESS the FWD call button on the Pilot Call Panel. 44. STEP 630 VERIFY a hi/lo chime is produced by the 2 electronic chime modules at the FWD attendant station. 45. STEP 631 PRESS the MID call button on the Pilot Call Panel. 46. STEP 632 VERIFY a hi/lo chime is produced by 1 electronic chime module at the MID attendant station. 47. STEP 633 PRESS the AFT call button on the Pilot Call Panel. 48. STEP 634 VERIFY a hi/lo chime is produced by 2 electronic chime module at the AFT attendant station. 49. STEP 635 OPEN the following circuit breaker on the P11 panel: CB NO. LOC NOMENCLATURE

------ --- ------------------------ C01007 C27 INTERPHONE-CABIN 50. STEP 636 VERIFY the attendant call lights extinguish. 51. STEP 637 CLOSE the following circuit breaker on the P11 panel: CB NO. LOC NOMENCLATURE

------ --- ------------------------ C01007 C27 INTERPHONE-CABIN

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### BOEING SERVICE BULLETIN 767-23-0164

52.STEP 638 STOP Pilots Call Panel Test 53.STEP 700 START Audio Control/Selector Panels Test 54.STEP 701 ADJUST the three (3) flight deck Audio Control/Selector Panels to the following configuration: A. CAB mic selector switch depressed. B. BOOM/OXY switch in BOOM position. C. All on/off volume controls "OFF" except CAB, which is to be "ON" with volume approximately midpoint. 55.STEP 702 REMOVE a FWD attendant handset from its cradle. 56.STEP 703 SPEAK into a boom microphone/headset at each audio control/selector panel and into the FWD attendant handset. NOTE: Press the audio control/selector panel PTT switch when speaking into the boom microphone/headset. 57.STEP 704 VERIFY good quality 2-way voice communication between the FWD attendant handset and the boom microphone/headsets. 58.STEP 705 PUT the FWD handset back in the cradle. 59.STEP 706 STOP Audio Control/Selector Panels Test 60.STEP 800 START Pilot Handset Test 61.STEP 801 DO dial "46" on the Flight Deck Handset. 62.STEP 802 SPEAK into the Handset Microphone. 63.STEP 803 VERIFY the announcement is NOT audible over the PA speakers. 64.STEP 804 PRESS and hold the PTT button on the Flight Deck Handset.

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### BOEING SERVICE BULLETIN 767-23-0164

65. STEP 805 VERIFY the announcement is clearly audible over the PA speakers. 66. STEP 806 PUT the Flight Deck handset back in the cradle. 67. STEP 807 STOP Pilot Handset Test 68. STEP 900 START Handset Audio Test 69. STEP 901 VERIFY good quality 2-way voice communication between the FWD1-L attendant handset and each of the following handsets: 1. FWD-R Handset 2. MID-C Handset 3. AFT-L Handset 4. AFT-R Handset NOTE: Return the above handsets to their cradles after verifying 2-way communication. 70. STEP 902 ENSURE all the handsets are in their cradles. 71. STEP 903 STOP Handset Audio Test 72. STEP 1000 START Attendant to PA Test 73. STEP 1001 ENSURE the PA system can be operated by performing the following steps at each handset: A. Remove the handset from cradle. B. Dial "46" on the handset. C. Speak into the handset. D. Verify announcement is not heard over the PA system. E. Push and hold the PTT button on the handset. F. Verify announcement is clearly audible over the PA system. G. Replace the handset in cradle. 74. STEP 1002 VERIFY that the previous steps were performed and PASSED for the following handsets: 1. FWD-L Handset 2. FWD-R Handset 3. MID-C Handset 4. AFT-L Handset 5. AFT-R Handset

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### BOEING SERVICE BULLETIN 767-23-0164

75.STEP 1003 STOP Attendant to PA Test 76.STEP 1100 START AAU Handset Port Verification Test 77.STEP 1101 ENSURE correct handset port interface by performing the following steps for all cabin attendant handsets: A. Remove the handset from cradle. B. DO dial the dial code assigned to the handsets station. C. Verify the PINK Attnd. call lights at the handset's station do not illuminate. D. Replace the handset in cradle. NOTE: 1. Assigned Dial Codes for handset locations are as follows: FWD-L = DOOR 1 L 11 FWD-R = DOOR 1 R 21 MID-C = OVERWING 34 AFT-L = DOOR 2 L 12 AFT-R = DOOR 2 22 2. Call light(s) will illuminate at the opposite station for FWD and AFT handsets including Repeater Bar Call Lights. 78.STEP 1102 VERIFY that the previous steps were performed and PASSED for the listed handset: 1. FWD-L Handset 2. FWD-R Handset 3. MID-C Handset 4. AFT-L Handset 5. AFT-R Handset 79.STEP 1103 STOP AAU Handset Port Verification Test

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### BOEING SERVICE BULLETIN 767-23-0164

E. On airplane VS303, do these steps to test the cabin interphone system: NOTE: The functional test given below was included directly from a Boeing functional test document. When the test was included in this service bulletin, the format, text, and step numbers were not changed. There are two numbers associated with each instruction. The number to the left is the sequence number which must be followed when you do the test. The number to the right of it is the "step" number. The step number is the actual number associated with the Boeing functional test document. The step number is referenced when repeat instructions are required within the functional test. 1. STEP 102 CAUTION ELECTRICAL POWER Potential Electrical Power Hazard exists when performing this test. Use applicable Shop procedures as required. 2. STEP 200 Tools and/or Equipment 3. STEP 201 Use the following listed equipment to perform test: - Shop Supply AR Boom Mic 4. STEP 202 VERIFY that test equipment used on this job, but not listed in this section, is documented using the appropriate method for recording non-conformities. 5. STEP 300 References 6. STEP 301 Wiring Diagrams

NUMBER TITLE

-------- ---------------------------------------- 23-31-11 Passenger Address Voice Input Circuitry 23-31-13 Passenger Address Output Circuitry/Controls 23-42-11 Cabin Interphone 23-42-12 Cabin Interphone - Electrical Chime 7. STEP 302 Schematics

NUMBER TITLE

-------- ---------------------------------------- 23-31-10 Passenger Address - Microphone and Input Controls 23-31-30 Passenger Address - Speaker Bus 1 23-31-40 Passenger Address - Speaker Bus 2 23-42-10 Cabin Interphone - Handset Interfaces 23-42-20 Cabin Interphone - Master Call Lights 23-42-30 Cabin Interphone - Chime Outputs 23-42-40 Cabin Interphone - Pilots Call Panel 23-42-50 Cabin Interphone - Flight/Cabin/Service 23-42-60 Cabin Interphone - Passenger Address

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### BOEING SERVICE BULLETIN 767-23-0164

8. STEP 400 General Information 9. STEP 404 Abbreviations and acronyms used in this test: AAU Audio Accessory Unit AR As Required DCU Data Concentrator Unit EICAS Engine Indication and Crew Alerting System LRU Line Replaceable Unit PA Passenger Address PTT Push To Talk 10. STEP 500 START Test Setup 11. STEP 501 ENSURE the following circuit breakers on the P11 panel are closed: (4 ACP/ASP) CB NO. LOC NOMENCLATURE

------ --- ------------------ C00548 C22 PASS. ADRS 1 C00558 C21 PASS. ADRS 2 C00551 C24 INTERPHONE-CABIN C00648 C26 DUAL PWR INTPH F/0 C00649 G30 DUAL PWR INTPH F/O C00644 C25 DUAL PWR INTPH CAPT C00645 C29 DUAL PWR INTPH CAPT 12. STEP 502 ENSURE all handsets are securely placed in their cradles. 13. STEP 503 STOP Test Setup 14. STEP 600 START Pilots Call Panel Test 15. STEP 601 DO dial "31" on a FWD attendant handset. NOTE: Ensure attendant handset is left off the cradle until verification of flight deck indications. 16. STEP 602 VERIFY the following: 1. HI chime is heard in the flight deck 2. FWD call button illuminates on the PCP 3. CABIN CALL illuminates on the Audio Select Panels 4. CABIN CALL illuminates on the EICAS computer displays 17. STEP 603 PRESS the FWD call button on the Pilots Call Panel.

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### BOEING SERVICE BULLETIN 767-23-0164

18. STEP 604 VERIFY the following: 1. FWD button extinguishes on the PCP 2. CABIN CALL extinguishes on the Audio Select Panels 3. CABIN CALL extinguishes on the EICAS computer displays 19. STEP 605 PUT the FWD handset back in the cradle. 20. STEP 606 DO dial "31" on the MID attendant handset. NOTE: Ensure attendant handset is left off the cradle until verification of flight deck indications. 21. STEP 607 VERIFY the following: 1. HI chime is heard in the flight deck 2. MID call button illuminates on the PCP 3. CABIN CALL illuminates on the Audio Select Panels 4. CABIN CALL illuminates on the EICAS computer displays 22. STEP 608 PRESS the MID call button on the Pilots Call Panel. 23. STEP 609 VERIFY the following: 1. MID button extinguishes on the PCP 2. CABIN CALL extinguishes on the Audio Select Panels 3. CABIN CALL extinguishes on the EICAS computer displays 24. STEP 610 PUT the MID handset back in the cradle. 25. STEP 611 DO dial "31" on a AFT attendant handset. NOTE: Ensure attendant handset is left off the cradle until verification of flight deck indications. 26. STEP 612 VERIFY the following: 1. HI chime is heard in the flight deck 2. AFT call button illuminates on the PCP 3. CABIN CALL illuminates on the Audio Select Panels 4. CABIN CALL illuminates on the EICAS computer displays 27. STEP 613 PRESS the AFT call button on the Pilots Call Panel.

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### BOEING SERVICE BULLETIN 767-23-0164

28.STEP 614 VERIFY the following: 1. AFT button extinguishes on the PCP 2. CABIN CALL extinguishes on the Audio Select Panels 3. CABIN CALL extinguishes on the EICAS computer displays 29.STEP 615 PUT the AFT handset back in the cradle. 30.STEP 616 PRESS the ALERT call button on the Pilots Call Panel 31.STEP 617 VERIFY the following: 1. Three (3) hi/lo chimes are produced by the PA speakers 2. 3 Pink Attnd. call lights flash at ATTENDANT STATIONS 3. 3 Pink Attnd. call lights flash at ATTENDANT STATIONS 4. 3 Pink Attnd. call lights flash at ATTENDANT STATIONS 32.STEP 618 DO dial "**" on the FWD-L Attendant handset. 33.STEP 619 VERIFY the following: 1. Three (3) hi/lo chimes are produced by the PA speakers 2. The FWD-L Pink flashing Attnd. call light extinguishes 3. CABIN ALERT illuminates on the EICAS Computer Displays 34.STEP 620 OPEN the following circuit breaker on the P11 panel: CB NO. LOC NOMENCLATURE

------ --- ------------------------ C01007 C24 INTERPHONE-CABIN SERVICE 35.STEP 621 VERIFY the flashing Pink Attnd. call lights extinguish. 36.STEP 622 CLOSE the following circuit breaker on the P11 panel: CB NO. LOC NOMENCLATURE

------ --- ------------------------ C01007 C24 INTERPHONE-CABIN SERVICE 37.STEP 623 PRESS the FWD call button on the Pilot Call Panel. 38.STEP 624 VERIFY a hi/lo chime is produced by the 2 electronic chime modules at the FWD attendant station. 39.STEP 625 PRESS the MID call button on the Pilot Call Panel.

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### BOEING SERVICE BULLETIN 767-23-0164

40. STEP 626 VERIFY a hi/lo chime is produced by 1 electronic chime module at the MID attendant station. 41. STEP 627 PRESS the AFT call button on the Pilot Call Panel. 42. STEP 628 VERIFY a hi/lo chime is produced by 2 electronic chime module at the AFT attendant station. 43. STEP 629 OPEN the following circuit breaker on the P11 panel: CB NO. LOC NOMENCLATURE

------ --- ------------------------ C01007 C24 INTERPHONE-CABIN SERVICE 44. STEP 630 VERIFY the attendant call lights extinguish. 45. STEP 631 CLOSE the following circuit breaker on the P11 panel: CB NO. LOC NOMENCLATURE

------ --- ------------------------ C02007 C24 INTERPHONE-CABIN SERVICE 46. STEP 632 STOP Pilots Call Panel Test 47. STEP 700 START Audio Control/Selector Panels Test 48. STEP 701 ADJUST the four (4) flight deck Audio Control/Selector Panels to the following configuration: A. CAB mic selector switch depressed. B. BOOM/OXY switch in BOOM position. C. All on/off volume controls "OFF" except CAB, which is to be "ON" with volume approximately midpoint. 49. STEP 702 REMOVE a FWD attendant handset from its cradle. 50. STEP 703 SPEAK into a boom microphone/headset at each audio control/selector panel and into the FWD attendant handset. NOTE: Press the audio control/selector panel PTT switch when speaking into the boom microphone/headset.

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### BOEING SERVICE BULLETIN 767-23-0164

51.STEP 704 VERIFY good quality 2-way voice communication between the FWD attendant handset and the boom microphone/headsets. 52.STEP 705 STOP Audio Control/Selector Panels Test 53.STEP 800 START Pilot Handset Test 54.STEP 801 DO dial "46" on the Flight Deck Handset. 55.STEP 802 SPEAK into the Handset Microphone. 56.STEP 803 VERIFY the announcement is NOT audible over the PA speakers. 57.STEP 804 PRESS and hold the PTT button on the Flight Deck Handset. 58.STEP 805 VERIFY the announcement is clearly audible over the PA speakers. 59.STEP 806 STOP Pilot Handset Test 60.STEP 900 START Handset Audio Test 61.STEP 901 VERIFY good quality 2-way voice communication between the FWD1-L attendant handset and each of the following handsets: 1. FWD-R Handset 2. MID-C Handset 3. AFT-L Handset 4. AFT-R Handset NOTE: Return the above handsets to their cradles after verifying 2-way communication. 62.STEP 902 ENSURE all the handsets are in their cradles. 63.STEP 903 STOP Handset Audio Test 64.STEP 1000 START Attendant to PA Test

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### BOEING SERVICE BULLETIN 767-23-0164

65. STEP 1001 ENSURE the PA system can be operated by performing the following steps at each handset: A. Remove the handset from cradle. B. Dial "46" on the handset. C. Speak into the handset. D. Verify announcement is not heard over the PA system. E. Push and hold the PTT button on the handset. F. Verify announcement is clearly audible over the PA system. G. Replace the handset in cradle. 66. STEP 1002 VERIFY that the previous steps were performed and PASSED for the following handsets: 1. FWD-L Handset 2. FWD-R Handset 3. MID-C Handset 4. AFT-L Handset 5. AFT-R Handset 67. STEP 1003 STOP Attendant to PA Test 68. STEP 1100 START AAU Handset Port Verification Test 69. STEP 1101 ENSURE correct handset port interface by performing the following steps for all cabin attendant handsets: A. Remove the handset from cradle. B. DO dial the dial code assigned to the handsets station. C. Verify the PINK Attnd. call lights at the handset's station do not illuminate. D. Replace the handset in cradle. NOTE: 1. Assigned Dial Codes for handset locations are as follows: FWD-L = DOOR 1 LEFT FWD-R = DOOR 1 RIGHT MID-C = MIDSTATION AFT-L = DOOR 3 LEFT AFT-R = DOOR 3 LEFT 2. Call light(s) will illuminate at the opposite station for FWD and AFT handsets. 70. STEP 1102 VERIFY that the previous steps were performed and PASSED for the listed handset: 1. FWD-L Handset 2. FWD-R Handset 3. MID-C Handset 4. AFT-L Handset 5. AFT-R Handset

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### BOEING SERVICE BULLETIN 767-23-0164

71.STEP 1103 STOP AAU Handset Port Verification Test F. Put the airplane back to a serviceable condition.

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### BOEING SERVICE BULLETIN 767-23-0164

FIGURE TABLE OF CONTENTS Title Page FIGURE 1. PILOTS' HANDSET REPLACEMENT .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 FIGURE 2. ATTENDANT HANDSET REPLACEMENT . . .. . . . . . . . . . . . . . . . . . . . . . . 27 FIGURE 3. AUDIO ACCESSORY UNIT REPLACEMENT (AIRPLANES VR051-VR057) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

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### BOEING SERVICE BULLETIN 767-23-0164



### CORD 

## PILOTS' HANDSET 1 2 3 FLIGHT COMPARTMENTV52511

FIGURE 1. PILOTS' HANDSET REPLACEMENT May 31, 2001 SHEET 1 OF 2 767-23-0164 25

### BOEING SERVICE BULLETIN 767-23-0164

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for the airplane.

STEP TASK NAME PART NUMBER QTY NOTES 1 Remove Pilots' Handset 285W0024-4A 1 Disconnect the handset from the cord. 2 Install Pilots' Handset 285W0024-8A 1 Connect the cord to the handset. 3 Make Sure Dialing Codes Marker BAC27TEX6744 (a) 1 Is installed. If the correct marker is not installed, replace the existing marker with the correct marker. Refer to BSOPM 20-50-05. BAC27TEX6686 (b) 1 (a)Airplanes VR051-VR057 (b) Airplane VS303

FIGURE 1. PILOTS' HANDSET REPLACEMENT May 31, 2001 SHEET 2 OF 2 767-23-0164 26

### BOEING SERVICE BULLETIN 767-23-0164



### APPLICABLE TO AIRPLANE VS303 APPLICABLE TO AIRPLANES VR051-VR057 FWD

FWD 

### A SEE HANDSET 

### A SEE HANDSET



### A SEE HANDSET 

### A SEE HANDSET 

### A SEE HANDSET

HANDSET 

### A SEE HANDSET 

### A SEE HANDSET 

### A SEE HANDSET 

### A SEE HANDSET 

### A SEEV52515

FIGURE 2. ATTENDANT HANDSET REPLACEMENT May 31, 2001 SHEET 1 OF 3 767-23-0164 27

### BOEING SERVICE BULLETIN 767-23-0164



### CORD 

## A 1 2

3V52539

FIGURE 2. ATTENDANT HANDSET REPLACEMENT May 31, 2001 SHEET 2 OF 3 767-23-0164 28

### BOEING SERVICE BULLETIN 767-23-0164

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for the airplane.

STEP TASK NAME PART NUMBER QTY NOTES 1 Remove Attendant Handset 285W0024-1L (a) 5 Disconnect the cord from the handset. 285W0024-1H (b) 5 2 Install Attendant Handset 285W0024-7L (a) 5 Connect the cord to the handset. 285W0024-7H (b) 5 3 Make Sure Dialing Codes Marker BAC27TEX6745 (a) 5 Is installed. If the correct marker is not installed, replace the existing marker with the correct marker. Refer to BSOPM 20-50-05. BAC27TEX6687 (b) 5 (a)Airplanes VR051-VR057 (b) Airplane VS303

FIGURE 2. ATTENDANT HANDSET REPLACEMENT May 31, 2001 SHEET 3 OF 3 767-23-0164 29

### BOEING SERVICE BULLETIN 767-23-0164



### 2 1

FWD 

### E2-5 SHELF

MAIN EQUIPMENT CENTERV52547
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the numbers of parts necessary for the airplane.

STEP TASK NAME PART NUMBER QTY NOTES 1 Remove Audio Accessory Unit 285T0001-301 1 Refer to AMM 767 23-42-01/401
2 Install Audio Accessory Unit 285T0001-302 1 Refer to AMM 767 23-42-01/401

FIGURE 3. AUDIO ACCESSORY UNIT REPLACEMENT (AIRPLANES VR051-VR057) May 31, 2001 SHEET 1 OF 1 767-23-0164 30

### Commercial Airplane Group 

# 767 Service Bulletin

Number: 767-23-0164 

## Evaluation Form Date: May 31, 2001 ATA System: 2342 Prepared By: Michael Nelson

SUBJECT: COMMUNICATIONS - Interphone - Cabin Interphone System - Audio Accessory Unit And Handset 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