### Commercial **Airplanes** 

# 777 Service Bulletin **Number: 777-24-0074** Original Issue: June 27, 2002 Revision 4: September 13, 2012 ATA System: 2400 **SUBJECT:** ELECTRICAL POWER - General - Install the Passenger Compartment Electrical Power Isolation Switches (Partial) Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws. 9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2002 Boeing. Unpublished Work. All Rights Reserved. Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, DreamlinerTM, BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing. BOEING is a trademark of Boeing Management Company.

Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 1 of 29 2.0Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 2 of 29 **BOEING SERVICE BULLETIN 777-24-0074**

BLANK PAGE**Table of Contents** Revision Transmittal Sheet............................................ 5 Summary...................................................... 7 1. PLANNING INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 A. Effectivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 B. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 C. Reason. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 H. Weight and Balance Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 I. Electrical Load Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 J. References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2. Data Supplied with this Service Bulletin:. . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3. Installation Drawings Used in the Preparation of this Service Bulletin:. . . . . . . . . . . 18 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 L. Interchangeability and Intermixability of Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 18 M. Software Accomplishment Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2. MATERIAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 C. Parts Necessary for Each Airplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2. Parts and Materials Supplied by the Operator:. . . . . . . . . . . . . . . . . . . . . . . . 21 3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4. Parts Removed and Not Replaced:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 D. Parts Necessary to Change Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 F. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . 22 3. ACCOMPLISHMENT INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 B. WORK INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 FIGURE 1: FLIGHT COMPARTMENT - INSTALL NEW WIRES [Group 1, Configuration 1]. . . . . . 26 FIGURE 2: FLIGHT COMPARTMENT - CHANGE THE AIRPLANE WIRING [Group 1, Configuration 1] . 28

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 3 of 29 **BOEING SERVICE BULLETIN 777-24-0074**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 4 of 29 **BOEING SERVICE BULLETIN 777-24-0074**

BLANK PAGE

### Commercial **Airplanes** 

# 777 Service Bulletin **Revision Transmittal Sheet Number: 777-24-0074**  Original Issue: June 27, 2002 Revision 4: September 13, 2012 ATA System: 2400 **SUBJECT:** ELECTRICAL POWER - General - Install the Passenger Compartment Electrical Power Isolation Switches (Partial) This revision includes all pages of the service bulletin. **COMPLIANCE INFORMATION RELATED TO THIS REVISION** No more work is necessary on the airplanes changed in accordance with Revision 3 of this service bulletin. **REASON FOR REVISION** This revision is sent to give more data to change an Electrical Power Control Panel, part number 233W3202-8 to the new part number 233W3202-22, and an Electrical Power Control Panel, part number 233W3202-9 to the new part number 233W3202-18. These sections were changed: 1. In Paragraph 1.A., Effectivity, removed Group 1, Configuration 3 and Group 1, Configuration 4. 2. In Summary, Background, Summary Manpower, Paragraph 1.C., Reason, Paragraph 1.G., Manpower and Paragraph 1.J.1., Existing Data, added BAE Systems SB 233W3202-24-03 reference. 3. In Paragraph 1.K., Publications Affected, changed the publications data. 4. In Paragraph 2.C.2., Parts and Materials Supplied by the Operator, added a table. 5. In Paragraph 2.C.3., Parts Modified and Reidentified, parts table, changed the notes. 6. In Paragraph 3.B., Work Instructions, step 4, changed the notes. Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location of important changes. Pages with no vertical lines have no important changes. **REVISION HISTORY** June 27, 2002 Original Issue: October 05, 2006 Revision 1: May 20, 2010 Revision 2:

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 5 of 29February 20, 2012 Revision 3: September 13, 2012 Revision 4:

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 6 of 29 **BOEING SERVICE BULLETIN 777-24-0074**

### Commercial **Airplanes** 

# 777 Service Bulletin **Summary Number: 777-24-0074**  Original Issue: June 27, 2002 Revision 4: September 13, 2012 ATA System: 2400 **SUBJECT:** ELECTRICAL POWER - General - Install the Passenger Compartment Electrical Power Isolation Switches (Partial) **CONCURRENT REQUIREMENTS** Refer to Paragraph 1.B., Concurrent Requirements. **BACKGROUND** The change described in this service bulletin will provide new switches on the flight deck that can remove power from the cabin systems if smoke or flames occur. Smoke and flames in the passenger cabin can cause injury to the passenger and damage the safety critical cabin equipments. We have received numerous reports of smoke or flames in the passenger cabin related to the wiring for the passenger cabin in-flight entertainment system, cabin lighting and passenger seats. It is not easy to remove the electrical power to these systems to stop the smoke or flames. Two switches can be installed to remove power from some of the passenger cabin electrical systems. When selected OFF, the IFE/PASS SEATS switch will remove power from the systems connected to the following circuit breakers (if installed):
**Nomenclature Panel and Position**  **Circuit Breaker** IFE COOLING FAN P110, B021 C21332 VOD P110, D021 C23355 IFE ZIA 1 P210, A005 C23356 IFE ZIA 2 P110, A024 C23357 IFE ZIA 3 P110, A027 C23358 IFE ZIA 4 P210, B002 C23359 VIDEO PGMS & CTRL P210, E005 C23403 CABIN PRINTER P210, C013 C23405 VIDEO PGMS & CTRL B P210, E008 C23471 When selected OFF, the CABIN/UTILITY switch will remove power from all galleys, the left and right utility buses, and systems connected to the following circuit breakers (if installed):

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 7 of 29**Nomenclature Panel and Position**  **Circuit Breaker** BULK CGO VENT FAN P210, A010 C21308 FWD CGO EXHAUST FAN P110, F023 C21330 RED ANTI-COLL LTS P210, E009 C33486 Boeing Service Related Problem (SRP) 777-SRP-24-0091 is related to this service bulletin. BAE Systems SB 233W3202-24-03 Original Issue and BAE Systems SB 233W3202-24-04 Revision 2 are related to this service bulletin. **ACTION (PRR 61887) Group 1, Configuration 1:**  Remove the Electrical Power Control Panel. Change the airplane wiring to install 8 new wires and remove 2 wires between the P5 panel and the P61 overhead panel card file. Install a new Electrical Power Control Panel with the two new cabin power control switches. Do a test of the new cabin power switches. **Group 1, Configuration 2:** More work is necessary. In the flight compartment, get access to the electrical power control panel. Do an inspection on the electrical power control panel for the part number. If the electrical power control panel has the part number 233W3202-18, and does have lockwire provisions on the switch guards at switches S6 and S10, then change the part number to 233W3202-19. If the electrical power control panel has the part number 233W3202-19, and does not have lockwire provisions on the switch guards at switches S6 and S10, then change the part number to 233W3202-18. **EFFECTIVITY** 777-200, 777-300 Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes. **COMPLIANCE** Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2010-NM-022-AD, is related to this service bulletin. Boeing recommends that this service bulletin to be done within 60 months after the effective date of an applicable Airworthiness Directive. **INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are not available for the configuration changes given in this service bulletin. **MANPOWER Group 1, Configuration 1:**  **Elapsed Hours Total Task Hours**  **Airplanes** 5.0 5.0 777-200, 777-300

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 8 of 29 **BOEING SERVICE BULLETIN 777-24-0074 Group 1, Configuration 1:**  The time to make the change to the electrical power control panel in accordance with the Boeing SB 777-31-0038 or BAE Systems SB 233W3202-24-03 Original Issue, and/or BAE Systems SB 233W3202-24-04 Revision 2 is not included. **Group 1, Configuration 1:** This estimate does not include the task hour data given in the service bulletins in Paragraph 1.B., Concurrent Requirements. **Group 1, Configuration 2: Elapsed Hours**  **Total Task Hours Airplanes**  1.00 1.00 More Work
**MATERIAL INFORMATION** Boeing Supplied Kits/Parts. Refer to Paragraph 2.A., Material - Price and Availability.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 9 of 29 **BOEING SERVICE BULLETIN 777-24-0074**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 10 of 29 **BOEING SERVICE BULLETIN 777-24-0074**

### Commercial **Airplanes** 

# 777 Service Bulletin **Number: 777-24-0074** Original Issue: June 27, 2002 Revision 4: September 13, 2012 ATA System: 2400 **SUBJECT:** ELECTRICAL POWER - General - Install the Passenger Compartment Electrical Power Isolation Switches (Partial) **1. PLANNING INFORMATION A. Effectivity**  1. Airplanes Refer to Service Bulletin Index D624W001 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 PRR 61887 for data about this change.
**DESCRIPTION CONFIGURATION**  **GROUP** 777-200/-300 airplanes that require flight deck switch installation.

- 1 777-200/-300 airplanes that have not accomplished BAE Systems service bulletin 233W3202-24-04 Original Issue or Revision 1. 1
777-200/-300 airplanes that have accomplished BAE Systems service bulletin 233W3202-24-04 Original Issue or Revision 1. 2

Airplane Models: 777-200, 777-300 **Group Variable Number**  1 WA001 1 WA101 - WA104 1 WA210 - WA212 1 WA221 - WA223 1 WA231 - WA232 1 WA241 - WA250

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 11 of 29**Group Variable Number**  1 WB016 - WB021 1 WB031 - WB044 1 WB105 - WB106 1 WB133 - WB135 1 WB151 - WB153 1 WB161 - WB173 1 WB181 - WB188 1 WB231 - WB239 1 WB271 - WB272 1 WB276 - WB286 1 WB291 - WB301 1 WB306 - WB307 1 WB311 - WB327 1 WB336 - WB337 1 WB366 - WB367 1 WB371 - WB386 1 WB406 1 WB411 - WB413 1 WB416 - WB433 1 WB446 - WB452 1 WB476 1 WB481 - WB484 1 WB501 - WB507 1 WB531 - WB535 1 WB551 - WB554 1 WB591 - WB595 1 WB601 - WB606 1 WB611 - WB615 1 WB631 - WB632 1 WB636 - WB637 1 WC051 - WC067 1 WC101 - WC103 1 WC111

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 12 of 29 **BOEING SERVICE BULLETIN 777-24-0074**2. Spares Affected Examine your spares supply for the parts or components identified in Paragraph 2.C., Parts Necessary for Each Airplane. If any parts or components are found, refer to Paragraph 2.C. for the recommended use. **B. Concurrent Requirements** The service bulletins listed below must be done before or at the same time as this service bulletin: **Group 1, Configuration 1: Applicable for all airplanes except WB181-WB188, WB231-WB239, WB611-WB615.**  **Description Service Bulletin**  **Company** Changes the ELMS OPS and OPC software tochange the oxygen mask inhibit to a fail-toground logic. (a) 777-24-0070 Original Issue. Boeing

Changes the ELMS OPS and OPC software to decrease the number of ELMS P110 Panel, ELMS P210 Panel and ELMS P310 Panel EICAS status messages. (a) 777-24-0087 Original Issue thru Revision 2. Boeing

Changes the ELMS OPS and OPC software to help make sure that the risk of an ignition source in the fuel tank is kept to a minimum. (a) 777-28A0039 Original Issue thru Revision 2. Boeing

(a) Boeing Service Bulletin 777-24-0070 or 777-24-0087 or 777-28A0039 must be done before or at the same time as this service bulletin 777-24-0074. **Group 1, Configuration 1: Applicable only for airplanes WB181-WB188, WB231-WB239, WB611-WB615.**  **Description Service Bulletin**  **Company** Changes the ELMS OPS and OPC software tochange the oxygen mask inhibit to a fail-toground logic. (a) 777-24-0079 Original Issue. Boeing

Changes the ELMS OPS and OPC software to decrease the number of ELMS P110 Panel, ELMS P210 Panel and ELMS P310 Panel EICAS status messages. (a) 777-24-0087 Original Issue thru Revision 2. Boeing

Changes the ELMS OPS and OPC software to help make sure that the risk of an ignition source in the fuel tank is kept to a minimum. (a) 777-28A0039 Original Issue thru Revision 2. Boeing

(a) Boeing Service Bulletin 777-24-0079 or 777-24-0087 or 777-28A0039 must be done before or at the same time as this service bulletin 777-24-0074. **Group 1, Configuration 2:** None.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 13 of 29 **BOEING SERVICE BULLETIN 777-24-0074 C. Reason**  The change described in this service bulletin will provide new switches on the flight deck that can remove power from the cabin systems if smoke or flames occur. Smoke and flames in the passenger cabin can cause injury to the passenger and damage the safety critical cabin equipments. We have received numerous reports of smoke or flames in the passenger cabin related to the wiring for the passenger cabin in-flight entertainment system, cabin lighting and passenger seats. It is not easy to remove the electrical power to these systems to stop the smoke or flames. Two switches can be installed to remove power from some of the passenger cabin electrical systems. When selected OFF, the IFE/PASS SEATS switch will remove power from the systems connected to the following circuit breakers (if installed):
**Nomenclature Panel and Position**  **Circuit Breaker** IFE COOLING FAN P110, B021 C21332 VOD P110, D021 C23355 IFE ZIA 1 P210, A005 C23356 IFE ZIA 2 P110, A024 C23357 IFE ZIA 3 P110, A027 C23358 IFE ZIA 4 P210, B002 C23359 VIDEO PGMS & CTRL P210, E005 C23403 CABIN PRINTER P210, C013 C23405 VIDEO PGMS & CTRL B P210, E008 C23471 When selected OFF, the CABIN/UTILITY switch will remove power from all galleys, the left and right utility buses, and systems connected to the following circuit breakers (if installed):
**Nomenclature Panel and Position**  **Circuit Breaker** BULK CGO VENT FAN P210, A010 C21308 FWD CGO EXHAUST FAN P110, F023 C21330 RED ANTI-COLL LTS P210, E009 C33486 Boeing Service Related Problem (SRP) 777-SRP-24-0091 is related to this service bulletin. BAE Systems SB 233W3202-24-03 Original Issue and BAE Systems SB 233W3202-24-04 Revision 2 are related to this service bulletin. Revision 1 was sent to add airplanes WB406 and WB476 to Group 1 of this service bulletin effectivity. Revision 2 was sent to add Boeing Service Bulletins to the Concurrent Requirements. Electrical Load Management System (ELMS) software changes are necessary for the changes in accordance with this service bulletin to operate.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 14 of 29 **BOEING SERVICE BULLETIN 777-24-0074**Revision 3 was sent to allow an Electrical Power Control Panel 233W3202-8, to be changed to a 233W3202-22 and 233W3202-9, to be changed to a 233W3202-18. Revision 4 is sent to give more data to change an Electrical Power Control Panel, part number 233W3202-8 to the new part number 233W3202-22, and an Electrical Power Control Panel, part number 233W3202-9 to the new part number 233W3202-18. **D. Description Group 1, Configuration 1:**  Remove the electrical system control panel. Change the airplane wiring to install 8 new wires and remove 2 wires between the P5 panel and the P61 overhead panel card file. Install a new electrical system control panel with the two new cabin power control switches. Do a test of the new cabin power switches. **Group 1, Configuration 2:** More work is necessary. In the flight compartment, get access to the electrical power control panel. Do an inspection on the electrical power control panel for the part number. If the electrical power control panel has the part number 233W3202-18, and does have lockwire provisions on the switch guards at switches S6 and S10, then change the part number to 233W3202-19. If the electrical power control panel has the part number 233W3202-19, and does not have lockwire provisions on the switch guards at switches S6 and S10, then change the part number to 233W3202-18. Revision 1 - No more work is necessary on airplanes changed as shown in the Original Issue of this service bulletin. Revision 2 - No more work is necessary on airplanes changed in accordance with the Original Issue or Revision 1 of this service bulletin. Revision 3 - More work is necessary on the airplanes changed in accordance with BAE Systems Service Bulletin 233W3202-24-04 Original Issue or Revision 1. The Electrical Power Control Panels 233W3202-12 and 233W3202-13 were incorrectly identified. The correct part number for the changed 233W3202-12 panel is 233W3202-18, and for the changed 233W3202-13 panel is 233W3202-19 then check lockwire provision on the S6 and S10 switch guards and the marked part number, to decide if the part number needs changing. Revision 4 - No more work is necessary on the airplanes changed in accordance with Revision 3 of this service bulletin. The work in this service bulletin is done in the maintenance zone(s) given below.
**Affected Maintenance Zones Zone**  **Model** 211, 212 777-200, 777-300 **E. Compliance** Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2010-NM-022-AD, is related to this service bulletin.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 15 of 29 **BOEING SERVICE BULLETIN 777-24-0074**Boeing recommends that this service bulletin to be done within 60 months after the effective date of an applicable Airworthiness Directive. **F. Approval** This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other 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. **G. Manpower** The table below shows an estimate of the task-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 task-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 **Group 1, Configuration 1: Elapsed Hours**  **Task-Hours Number of Persons**  **Task** 0.25 0.25 1 Open Access 4.00 4.00 1 Change 0.25 0.25 1 Close Access 0.50 0.50 1 Test 5.00 5.00 TOTAL FOR EACH AIRPLANE **Group 1, Configuration 1:** The time to make the change to the electrical power control panel in accordance with the Boeing SB 777-31-0038 or BAE Systems SB 233W3202-24-03 Original Issue, and/or BAE Systems SB 233W3202-24-04 Revision 2 is not included. **Group 1, Configuration 1:** This estimate does not include the task hour data given in the service bulletins in Paragraph 1.B., Concurrent Requirements.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 16 of 29 **BOEING SERVICE BULLETIN 777-24-0074 Group 1, Configuration 2:**  **Elapsed Hours Task Hours**  **Number of Persons Task**  0.25 0.25 1 Open Access 0.25 0.25 1 Inspect 0.25 0.25 1 Change 0.25 0.25 1 Close Access 1.00 1.00 TOTAL FOR EACH AIRPLANE **H. Weight and Balance Changes Group 1, Configuration 1:**  **Change in Moment (Pound-Inches)**  **Change in Weight (Pounds)**  **Airplane**
+26.8 +0.1 777-200 -2.1 +0.1 777-300 **Group 1, Configuration 2:** None. **I. Electrical Load Data** Not changed. **J. References** 1. Existing Data: a. Engineering Change Memo PRR 61887 b. Boeing Service Bulletin 777-24-0070, 777-24-0079, 777-24-0087, 777-28A0039, 777-31-0038 c. Boeing Service Related Problem (SRP) 777-SRP-24-0091 d. Federal Aviation Administration (FAA) Notice of Proposed Rule Making (NPRM) 2010-NM-022-AD e. Service Bulletin Index D624W001 f. Standard Overhaul Practices Manual (SOPM) 20-50-10 g. Standard Wiring Practices Manual (SWPM) 20-10-11, 20-10-12, 20-10-19, 20-61-11, 20-74-11, 20-90-15 h. 777 Aircraft Maintenance Manual (AMM) 24-22-00, 24-22-01, 33-13-00, 33-16-00 i. 777 Wiring Diagram Manual (WDM) 23-93-21, 24-51-24, 25-51-41

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 17 of 29 **BOEING SERVICE BULLETIN 777-24-0074**j. BAE Systems Service Bulletin 233W3202-24-03, 233W3202-24-04 **NOTE:** These Service Bulletins were previously issued by Boeing. 2. Data Supplied with this Service Bulletin: None. 3. Installation Drawings Used in the Preparation of this Service Bulletin:
**Title Drawing Number**  Wire Bundle Installation, Overhead Panels, P11, P5, P61 288W9005

This drawing was used to prepare this service bulletin. This drawing is not necessary to make the specified changes, and is not supplied with this service bulletin. This drawing may not be applicable to all airplane configurations or operators. **K. Publications Affected** 1. Publications: **Chapter-Section Publication**  6.10, 6.20, 6.30, NNC.6 777 Operations Manual 24-00, 24-40, 33-20, 33-27 777 Aircraft Maintenance Manual 23-93, 24-51 777 Wiring Diagram Manual 24-21, 24-22, 24-25, 24-31, 24-41, 31-10, 31-12, 33-13, 49-42 777 Illustrated Parts Catalog
23-93, 24-51 777 Schematic Diagram Manual 2. Damage Tolerance Based Structural Inspections: Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary. **L. Interchangeability and Intermixability of Parts** Refer to Paragraph 2.C., Parts Necessary for Each Airplane, for interchangeability and intermixability information. **M. Software Accomplishment Summary** Not Affected.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 18 of 29 **BOEING SERVICE BULLETIN 777-24-0074 2. MATERIAL INFORMATION**  **A. Material - Price and Availability** Boeing can supply the kit shown in Paragraph 2.C., Parts Necessary for Each Airplane. Operators are encouraged to share schedule requirements with Boeing for incorporation of the service bulletin. The kit are subject to the terms and conditions of the Boeing standard purchase order acknowledgment. Prices are in United States Dollars. Terms: Net 30 days. Reference this service bulletin and submit your purchase order by one of these methods: 1. Order on-line via ATA Spec 2000 or The Boeing PART Page 2. Fax to (206) 662-7145 **Group 1, Configuration 1: REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST RESPONDER**  **AT FR@BOEING.COM FOR THE LATEST REORDER LEAD TIME (ROLT) AND PRICE INFORMATION**
**Unit Price as of the original issue** **date of this Ser vice Bulletin (US**  **Dollars) ROLT as of the**  **original issue date of this Ser** **vice Bulletin (Cal endar Days)**  **QTY Date**  **Name Kit Number** 

751.00 149 1
- Top Kit 005W3198-1 **Group 1, Configuration 2:** None. **B. Industry Support Information** Boeing warranty remedies are not available for the configuration changes given in this service bulletin. **C. Parts Necessary for Each Airplane** 1. Kits/Parts: **Group 1, Configuration 1:** To get the kits/parts shown below, refer to Paragraph 2.A., Material - Price and Availability. **NOTE: Group 1, Configuration 1:**  One top kit and the items shown in Paragraph 2.C.2., Parts and Materials Supplied by the Operator, are necessary for each airplane.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 19 of 29 **BOEING SERVICE BULLETIN 777-24-0074 Group 1, Configuration 1:** 
**Kit 005W3198 Notes**  **Existing Part Number**  **Name QTY**  **New Part Number -1**  (a) Top Kit

- 005W3198-1 (a) Wire Kit 1 280W5111-1 Strap 20 BACS38K1B Strap 10 BACS38K2B (a) There are more parts than are necessary. **Group 1, Configuration 1:**
**Kit 280W5111 Notes**  **Existing Part Number**  **Name QTY**  **New Part Number -201**  **-101 -1**  Wire Kit

- 280W5111-1 Kit, W1052

- - 1 280W5111-101 Wire

- 1
- 280W5111-101W Tie Wrap

- 1
- 280W5111-10101 Identification Tape

- 1
- 280W5111-10102 Identification Tape

- 1
- 280W5111-10103 (a) Kit, Standard

- - 1 280W5111-201 Contact, Socket 2 8
- BACC47CP1S (b) Contact, Socket 1 6
- CTA0165 (CTA- 0165) Contact, Pin 1 2
- S280W555-920 (b) Contact, Socket 1 6
- 318-01-99-036 (a) There are more parts than are necessary. (b) Contact 318-01-99-036 optional to CTA0165.

**Group 1, Configuration 2:** None.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 20 of 29 **BOEING SERVICE BULLETIN 777-24-0074**2. Parts and Materials Supplied by the Operator: **Group 1, Configuration 1:**
**Notes Existing Part Number**  **Name QTY**  **Part Number / Specifica- tion**  (c) (d) 233W3202-6 Electrical Power Control Panel 1 233W3202-19 (a) (c) (d) 233W3202-7 Electrical Power Control Panel 1 233W3202-18 (a) (c) (e) 233W3202-8 Electrical Power Control Panel 1 233W3202-22 (b) (c) (f) 233W3202-9 Electrical Power Control Panel 1 233W3202-18 (a) (a) This part is used in production. (b) This part is not used in production. (c) You cannot use the existing part to replace the new or changed part. (d) The existing part number can be changed to the new part number in accordance with BAE Systems SB 233W3202-24-04 Revision 2. (e) The existing part number can be changed to the new part number in two steps. The part number 233W3202-8 can be changed to part number 233W3202-11 in accordance with Boeing SB 777-31-0038 or BAE Systems SB 233W3202-24-03 Original Issue, and then to the new part number in accordance with BAE Systems SB 233W3202-24-04 Revision 2. (f) The existing part number can be changed to the new part number in two steps. The part number 233W3202-9 can be changed to part number 233W3202-12 in accordance with Boeing SB 777-31-0038 or BAE Systems SB 233W3202-24-03 Original Issue, and then to the new part number in accordance with BAE Systems SB 233W3202-24-04 Revision 2. **Group 1, Configuration 2:** None. 3. Parts Modified and Reidentified: The parts shown below are changed as shown in this service bulletin. The quantity (QTY) is the number of parts changed on each airplane. **Group 1, Configuration 1:**
**Notes New Number**  **Name QTY**  **Existing Part Number** (a) 233W3202-19 Electrical Power Control Panel 1 233W3202-6 (a) 233W3202-18 Electrical Power Control Panel 1 233W3202-7 (b) 233W3202-22 Electrical Power Control Panel 1 233W3202-8 (c) 233W3202-18 Electrical Power Control Panel 1 233W3202-9 (a) Make the change in accordance with BAE Systems SB 233W3202-24-04 Revision 2. (b) Make the change in two steps. The part number 233W3202-8 is changed to part number 233W3202-11 in accordance with Boeing SB 777-31-0038 or BAE Systems SB 233W3202-24-03 Original Issue, and then to the new part number in accordance with BAE Systems SB 233W3202-24-04 Revision 2.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 21 of 29 **BOEING SERVICE BULLETIN 777-24-0074 Group 1, Configuration 1:** 
**Notes New Number**  **Name QTY**  **Existing Part Number** (c) Make the change in two steps. The part number 233W3202-9 is changed to part number 233W3202-12 in accordance with Boeing SB 777-31-0038 or BAE Systems SB 233W3202-24-03 Original Issue, and then to the new part number in accordance with BAE Systems SB 233W3202-24-04 Revision 2. **Group 1, Configuration 2:** None. 4. Parts Removed and Not Replaced: None. **D. Parts Necessary to Change Spares** None. **E. Special Tooling - Price and Availability** None. **F. 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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 22 of 29 **BOEING SERVICE BULLETIN 777-24-0074 3. ACCOMPLISHMENT INSTRUCTIONS**  **A. GENERAL INFORMATION CAUTION:**  KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE. **NOTE:** 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for definition of the acronyms. 2. Obey all of the warnings and cautions given in the specified manual sections. 3. Unless shown differently, these dimensions and tolerances are used: — Linear dimensions are in inches. — Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch. — Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch. — Angular tolerance is plus or minus 2 degrees. — Hole dimensions for standard solid rivets are given in 777 Structural Repair Manual, Chapter 51. — Torque limits to tighten nuts and bolts are given in 777 Structural Repair Manual, Chapter 51. 4. For approved fastener and process material substitutions, refer to 777 Structural Repair Manual, Chapter 51, Alternate fasteners are given in 777 Structural Repair Manual Chapter 51 and Boeing Drawing 012W6100. 5. If the length of fasteners specified in this service bulletin do not meet the installation standards, fasteners of the same specification, or an approved substitute, one grip length longer or shorter may be used. 6. Refer to the SWPM 20-10-11 and SWPM 20-10-12 for the wire installation procedures, and SWPM 20-10-19 for the wire separation requirements, as accepted procedures. 7. These work instructions refer to procedures included in other Boeing documents. When the words "refer to" are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used. When the words "in accordance with" are included in the instruction, the procedure in the Boeing document must be used. 8. This service bulletin includes functional test procedures for the systems changed by this service bulletin. More functional tests can possibly be necessary in accordance with standard maintenance practices because of interruption to other airplane systems. 9. If it is necessary to remove more parts for access, you can remove those parts. If you can get access without removing identified parts, it is not necessary to remove all of the identified parts. Jacking and shoring limitations must be observed.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 23 of 29 **BOEING SERVICE BULLETIN 777-24-0074 B. WORK INSTRUCTIONS**  **Group 1, Configuration 1:** 1. Remove the electrical power from the airplane. Refer to 777 AMM 24-22-00, Remove Electrical Power as an accepted procedure. 2. Get access to the flight compartment and remove the Electrical Power Control Panel. Refer to 777 AMM 24-22-01, Electrical Module Assembly Removal as an accepted procedure. 3. Make a change to the airplane wiring in accordance with FIGURE 1 and FIGURE 2. 4. Install a new Electrical Power Control Panel 233W3202-18, 233W3202-19 or 233W3202-22. Refer to 777 AMM 24-22-01, Electrical Module Assembly Installation as an accepted procedure. **NOTE:** The removed electrical power control panel, part number 233W3202-6 or 233W3202-7 can be changed to the new part number in accordance with BAE Systems SB 233W3202-24-04 Revision 2. **NOTE:** The removed electrical power control panel, part number 233W3202-8 can be changed to the new part number in two steps. The part number 233W3202-8 can be changed to part number 233W3202-11 in accordance with Boeing SB 777-31-0038 or BAE Systems SB 233W3202-24-03 Original Issue, and then to the new part number in accordance with BAE Systems SB 233W3202-24-04 Revision 2. **NOTE:** The removed electrical power control panel, part number 233W3202-9 can be changed to the new part number in two steps. The part number 233W3202-9 can be changed to part number 233W3202-12 in accordance with Boeing SB 777-31-0038 or BAE Systems SB 233W3202-24-03 Original Issue, and then to the new part number in accordance with BAE Systems SB 233W3202-24-04 Revision 2. 5. Do the Master Dim and Test - Operational Test, and the Integral Panel Lights - Operational Test for the Electrical Power Control Panel. Refer to 777 AMM 33-16-00, Master Dim and Test - Operational Test, and 777 AMM 33-13-00 Integral Panel Lights - Operational Test as accepted procedures. 6. Do this test of the new cabin power switches: a. Select the IFE/PASS SEATS switch to OFF. b. See that the bottom part of the switch is lit. c. See that all video entertainment players and audio entertainment players are off. d. See that all video monitors and projectors are off. e. Select the IFE/PASS SEATS switch to ON. f. See that the top part of the switch is lit. g. Select the CABIN/UTILITY switch to OFF. h. See that the bottom part of the switch is lit.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 24 of 29 **BOEING SERVICE BULLETIN 777-24-0074**i. On the EICAS, select the Electrical Maintenance page 2/2. See that the UTIL L/R bus is not powered. j. See that no electrical power is available in any of the galleys. k. Select the CABIN/UTILITY switch to ON. l. See that the top part of the switch is lit. m. On the EICAS, select the Electrical Maintenance page 2/2. See that the UTIL L/R bus is ON. **NOTE:** Depending on the load shed configuration, it can take up to two minutes for the utility bus to come on line. n. See that electrical power is available in all of the galleys. 7. Put the airplane back to a serviceable condition. **Group 1, Configuration 2: CONDITION: MORE WORK IS NECESSARY - ELECTRICAL POWER CONTROL PANEL**  **INSPECTION** 1. In the flight compartment, get access to the Electrical Power Control Panel. Refer to 777 AMM 24-22-01 as an accepted procedure. 2. Do an inspection on the Electrical Power Control Panel for the part number. 3. If the Electrical Power Control Panel does not have the part number 233W3202-18 or 233W3202-19, then no change is necessary. 4. If the Electrical Power Control Panel has the part number 233W3202-18, and does not have lockwire provision on the switch guards at switches S6 and S10, then no change is necessary. 5. If the Electrical Power Control Panel has the part number 233W3202-18, and does have lockwire provision on the switch guards at switches S6 and S10, then change the part number to 233W3202-19. Refer to SOPM 20-50-10 as an accepted procedure. 6. If the electrical power control panel has the part number 233W3202-19, and does have lockwire provision on the switch guards at switches S6 and S10, then no change is necessary. 7. If the electrical power control panel has the part number 233W3202-19, and does not have lockwire provision on the switch guards at switches S6 and S10, then change the part number to 233W3202-18. Refer to SOPM 20-50-10 as an accepted procedure. 8. Put back the Electrical Power Control Panel. Refer to 777 AMM 24-22-01 as an accepted procedure. 9. Put the airplane back to a serviceable condition.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4: September 13, 2012 25 of 29 **BOEING SERVICE BULLETIN 777-24-0074 This Figure applies only to: Group 1, Configuration 1.** 

**FIGURE 1: FLIGHT COMPARTMENT - INSTALL NEW WIRES (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4 September 13, 2012 26 of 29 **BOEING SERVICE BULLETIN 777-24-0074**The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
**NOTES QTY**  **PART NUMBER NAME**  **TASK STEP**  Use the straps as necessary. Wire bundle W1052 has a separation color of brown and a separation category of RM2. Refer to SWPM 20-10-19 as an accepted procedure. - 280W5111-101W Wire Install 1

- BACS38K1B Strap Use:

- BACS38K2B Strap

**FIGURE 1: FLIGHT COMPARTMENT - INSTALL NEW WIRES (SHEET 2 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4 September 13, 2012 27 of 29 **BOEING SERVICE BULLETIN 777-24-0074 This Figure applies only to: Group 1, Configuration 1.** 

REFERENCE: 777 WDM 23-93-21, 777 WDM 24-51-24, 777 WDM 25-51-41.

**FIGURE 2: FLIGHT COMPARTMENT - CHANGE THE AIRPLANE WIRING (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4 September 13, 2012 28 of 29 **BOEING SERVICE BULLETIN 777-24-0074**The flag note numbers shown below agree with the numbers shown in the flag symbols in the figure.
**NOTES QTY**  **PART NUMBER NAME**  **FLAG NOTE**  Refer to SWPM 20-61-11 as an accepted procedure. 8 BACC47CP1S Contact, Socket 1
Refer to SWPM 20-74-11 as an accepted procedure. 6 318-01-99-036 (or CTA0165) Contact, Socket 2
Refer to SWPM 20-90-15 as an accepted procedure. 2 S280W555-920 Contact, Pin 3
Refer to SWPM 20-10-11 as an accepted procedure. 1 280W5111-10102 ID Tape 4
Refer to SWPM 20-10-11 as an accepted procedure. 1 280W5111-10103 ID Tape 5

**FIGURE 2: FLIGHT COMPARTMENT - CHANGE THE AIRPLANE WIRING (SHEET 2 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 27, 2002 777-24-0074 Revision 4 September 13, 2012 29 of 29 **BOEING SERVICE BULLETIN 777-24-0074**