### Commercial **Airplanes** 

# 767 Service Bulletin **SPECIAL ATTENTION Number: 767-28-0106**  Original Issue: August 25, 2010 ATA System: 2841 **SUBJECT:** FUEL - Fuel Quantity Indicating System (FQIS)- Fuel Quantity Processor Unit, Low Fuel Quantity Indication Test Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). 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## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work. This document includes proprietary information owned by The Boeing Company and/or one or more third parties. Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, 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 the Boeing livery 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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 1 of 27 6.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 2 of 27 **BOEING SERVICE BULLETIN 767-28-0106**

BLANK PAGE**Table of Contents** Summary...................................................... 5 1. PLANNING INFORMATION ........................................ 9 A. Effectivity................................................ 9 1. Airplanes............................................. 9 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 B. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 C. Reason. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 D. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3. Installation Drawings Used in the Preparation of this Service Bulletin. . . . . . . . . . . . 17 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 L. Interchangeability and Intermixability of Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 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. . . . . . . . . . . . . . . . . . . . . . . . 19 3. Parts Modified and Reidentified. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4. Parts Removed and Not Replaced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 D. Parts Necessary to Change Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 F. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . 19 3. ACCOMPLISHMENT INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 A. GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 B. WORK INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 FIGURE 1: [Group 1]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 FIGURE 2: [Group 2]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 3 of 27 **BOEING SERVICE BULLETIN 767-28-0106**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 4 of 27 **BOEING SERVICE BULLETIN 767-28-0106**

BLANK PAGE

### Commercial **Airplanes** 

# 767 Service Bulletin **SPECIAL ATTENTION Summary**  **Number: 767-28-0106** Original Issue: August 25, 2010 ATA System: 2841 **SUBJECT:** FUEL - Fuel Quantity Indicating System (FQIS)- Fuel Quantity Processor Unit, Low Fuel Quantity Indication Test BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY. **CONCURRENT REQUIREMENTS** None.

**BACKGROUND** This service bulletin provides test procedures to make sure that the Engine Indication and Crew Alerting System (EICAS) receives both, the LOW FUEL and the FUEL CONFIG discrete signals from the Fuel Quantity Processor Unit (FQPU), and the Fuel Quantity Indicating System (FQIS), is functioning correctly. If this service bulletin is not incorporated flight crews may be unaware of low fuel situations that can lead to fuel exhaustion and extreme emergency measures. A 757-200 operator reported that the Low Fuel Indicating System failed to alert the flight crew that the fuel in Left Hand (LH) and Right Hand (RH) main tanks were depleted below the minimum 2,200 lbs in either tank. The Low Fuel Threshold is 2,200 lbs of fuel for either Main Fuel Tank for both 757 and 767 airplanes. When the fuel in either LH or RH main tank is below 2,200 lbs, the EICAS should receive both the LOW FUEL and FUEL CONFIG discrete signals from the FQPU in order for EICAS to display the LOW FUEL caution message. The Operator reported to Boeing that the airplane arrived at it’s destination with main tank fuel levels below the Low Fuel Threshold. The next flight crew reported 8,000 lbs of fuel in the Center Wing Tank (CWT), 1,800 lbs of fuel in the Right Hand Main Fuel Tank and 1,400 lbs of fuel in the Left Hand Main Fuel tank. Boeing determined this to be a safety issue for 767 airplanes due to the similarity of FQIS, EICAS and LFDS Systems. Operators can expect to eliminate similar safety incidents by doing the interval tests in accordance with this service bulletin. The 767-400ER airplanes have Large Format Display System, LFDS, which replaces EICAS system, interfaces with FQIS and has a different flight deck arangement from the 767-200, -300 and -300F airplanes. 757/767-SRP-28-0124 is related to this service bulletin. **ACTION** Test the Low Fuel Quantity Indicating System to make sure that the Low Fuel Indication and the Fuel Configuration indication are functioning correctly.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 5 of 27Make sure the EICAS caution message "LOW FUEL" shows on the EICAS display and the "FUEL CONFIG" light on the Pilots Overhead Panel (P5 Panel) comes "ON". If the test fails troubleshoot for wiring faults, bent connector pins, or damaged equipment. Repair or replace damaged wires or equipment.

**EFFECTIVITY** All 767 Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes. **COMPLIANCE** The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Boeing recommends that the Inspection/Interval Test given in this service bulletin be done every 100 flight hours. **INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are not available for the Inspection/Interval Test given in this service bulletin. **MANPOWER** Refer to Paragraph 1.G., Manpower. **MATERIAL INFORMATION** None.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 6 of 27 **BOEING SERVICE BULLETIN 767-28-0106**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 7 of 27 **BOEING SERVICE BULLETIN 767-28-0106**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 8 of 27 **BOEING SERVICE BULLETIN 767-28-0106**

### Commercial **Airplanes** 

# 767 Service Bulletin **SPECIAL ATTENTION Number: 767-28-0106**  Original Issue: August 25, 2010 ATA System: 2841 **SUBJECT:** FUEL - Fuel Quantity Indicating System (FQIS)- Fuel Quantity Processor Unit, Low Fuel Quantity Indication Test BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY. **1. PLANNING INFORMATION A. Effectivity**  1. Airplanes This service bulletin is for the airplanes shown below. Refer to Service Bulletin Index Document D624T001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. **NOTE:** This service bulletin is for the airplanes identified below. The effectivity list shown below is complete for airplanes through line number 1002. At least one airplane after line number 1002 is also affected by this service bulletin, and these airplanes are in Group(s) 1. These airplanes will be added to the service bulletin's MyBoeingFleet.com (MBF) \"get effectivity\" result when they are added to the MBF Fleet Profile Page.
**DESCRIPTION CONFIGURATION**  **GROUP** All 767-200, -300, -300F Airplanes.

- 1 All 767-400ER Airplanes.

- 2

Airplane Models: 767-200, 767-300, 767-300F, 767-400ER **Group Variable Number**  1 VA001 - VA020 1 VA301 - VA315 1 VA501 - VA530 1 VA701 - VA719

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 9 of 27**Group Variable Number**  1 VA801 - VA810 1 VB001 - VB002 1 VB051 - VB055 1 VB101 - VB125 1 VB201 - VB202 1 VB251 - VB253 1 VB281 - VB284 1 VB301 - VB302 1 VB321 - VB332 1 VB371 - VB373 1 VB401 1 VB441 - VB444 1 VE001 - VE003 1 VE021 - VE023 1 VE041 - VE043 1 VE061 - VE069 1 VE083 - VE086 1 VE101 - VE104 1 VE116 - VE118 1 VE121 - VE126 1 VE141 - VE152 1 VE171 - VE172 1 VF001 - VF002 1 VF041 - VF042 1 VF051 1 VF061 - VF062 1 VF071 - VF072 1 VF091 - VF093 1 VF101 - VF102 1 VF161 - VF162 1 VF171 - VF172 1 VF180 - VF184 1 VF251

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 10 of 27 **BOEING SERVICE BULLETIN 767-28-0106 Group**  **Variable Number** 1 VK001 - VK016 1 VK021 - VK022 1 VK031 - VK056 1 VK081 - VK113 1 VK131 - VK133 1 VK141 - VK148 1 VK161 - VK164 1 VK171 1 VK181 1 VK186 1 VL001 - VL006 1 VL011 1 VL701 - VL703 1 VL751 - VL755 1 VL806 - VL807 1 VL871 - VL873 1 VL891 - VL900 1 VL911 - VL914 1 VL931 - VL932 1 VL941 1 VN001 - VN041 1 VN051 - VN064 1 VN081 - VN099 1 VN111 - VN127 1 VN130 - VN137 1 VN151 - VN158 1 VN163 - VN168 1 VN171 - VN174 1 VN191 - VN198 1 VN211 - VN212 1 VN221 - VN225 1 VN231 - VN234 1 VN241 - VN243

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 11 of 27 **BOEING SERVICE BULLETIN 767-28-0106 Group**  **Variable Number** 1 VN251 - VN276 1 VN291 - VN293 1 VN301 - VN314 1 VN371 - VN372 1 VN376 1 VN381 - VN388 1 VN421 - VN427 1 VN436 1 VN471 - VN472 1 VN491 - VN513 1 VN531 - VN532 1 VN536 - VN537 1 VN541 - VN542 1 VN546 - VN547 1 VN551 1 VN556 - VN557 1 VN561 - VN562 1 VN631 - VN638 1 VN651 - VN658 1 VN671 - VN672 1 VN676 1 VN681 - VN691 1 VN731 - VN732 1 VN751 - VN753 1 VN791 - VN792 1 VN811 - VN813 1 VN921 - VN922 1 VN931 - VN936 1 VN951 - VN953 1 VN966 - VN972 2 VQ001 - VQ021 2 VQ071 - VQ086 2 VQ111

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 12 of 27 **BOEING SERVICE BULLETIN 767-28-0106 Group**  **Variable Number** 1 VR051 - VR060 1 VR081 1 VR084 1 VR086 - VR089 1 VR106 - VR109 1 VR201 - VR211 1 VR251 1 VR256 - VR260 1 VR266 - VR273 1 VR401 1 VR421 - VR423 1 VR426 1 VR441 1 VR461 1 VR471 - VR472 1 VS051 - VS056 1 VS061 1 VS066 - VS070 1 VS073 - VS078 1 VS091 - VS104 1 VS111 - VS113 1 VS131 - VS133 1 VS136 - VS137 1 VS176 - VS177 1 VS186 - VS187 1 VS196 - VS203 1 VS206 - VS208 1 VS211 1 VS216 - VS217 1 VS231 1 VS246 - VS248 1 VS261 - VS263 1 VS266 - VS274

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 13 of 27 **BOEING SERVICE BULLETIN 767-28-0106 Group**  **Variable Number** 1 VS291 - VS293 1 VS301 - VS303 1 VS306 - VS311 1 VS316 1 VS321 - VS324 1 VS331 - VS333 1 VS336 - VS337 1 VS366 - VS367 1 VS381 - VS382 1 VS391 - VS392 1 VS401 1 VS426 - VS428 1 VS466 - VS472 1 VS486 1 VS496 - VS497 1 VS506 - VS507 1 VS526 1 VS546 - VS549 1 VS701 - VS736 1 VS751 - VS759 1 VS821 - VS825 1 VS841 - VS844 1 VS861 1 VS881 - VS883 1 VS891 1 VS896 1 VS901 - VS912 1 VS916 1 VS921 - VS925 1 VS931 - VS933 1 VS941 1 VS951 - VS954 1 VS961 - VS964

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 14 of 27 **BOEING SERVICE BULLETIN 767-28-0106 Group**  **Variable Number** 1 VT501 1 VT511 - VT513 1 VT521 - VT523 1 VT531 - VT533 1 VT541 - VT543 1 VV001 1 VW701 - VW721 1 VW851 2. Spares Affected None. **B. Concurrent Requirements** None. **C. Reason** This service bulletin provides test procedures to make sure that the Engine Indication and Crew Alerting System (EICAS) receives both, the LOW FUEL and the FUEL CONFIG discrete signals from the Fuel Quantity Processor Unit (FQPU), and the Fuel Quantity Indicating System (FQIS), is functioning correctly. If this service bulletin is not incorporated flight crews may be unaware of low fuel situations that can lead to fuel exhaustion and extreme emergency measures. A 757-200 operator reported that the Low Fuel Indicating System failed to alert the flight crew that the fuel in Left Hand (LH) and Right Hand (RH) main tanks were depleted below the minimum 2,200 lbs in either tank. The Low Fuel Threshold is 2,200 lbs of fuel for either Main Fuel Tank for both 757 and 767 airplanes. When the fuel in either LH or RH main tank is below 2,200 lbs, the EICAS should receive both the LOW FUEL and FUEL CONFIG discrete signals from the FQPU in order for EICAS to display the LOW FUEL caution message. The Operator reported to Boeing that the airplane arrived at it’s destination with main tank fuel levels below the Low Fuel Threshold. The next flight crew reported 8,000 lbs of fuel in the Center Wing Tank (CWT), 1,800 lbs of fuel in the Right Hand Main Fuel Tank and 1,400 lbs of fuel in the Left Hand Main Fuel tank. Boeing determined this to be a safety issue for 767 airplanes due to the similarity of FQIS, EICAS and LFDS Systems. Operators can expect to eliminate similar safety incidents by doing the interval tests in accordance with this service bulletin. The 767-400ER airplanes have Large Format Display System, LFDS, which replaces EICAS system, interfaces with FQIS and has a different flight deck arangement from the 767-200, -300 and -300F airplanes. 757767-SRP-280124 is related to this service bulletin.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 15 of 27 **BOEING SERVICE BULLETIN 767-28-0106 D. Description**  Test the Low Fuel Quantity Indicating System to make sure that the Low Fuel Indication and the Fuel Configuration indication are functioning correctly. Make sure the EICAS caution message "LOW FUEL" shows on the EICAS display and the "FUEL CONFIG" light on the Pilots Overhead Panel (P5 Panel) comes "ON". If the test fails troubleshoot for wiring faults, bent connector pins, or damaged equipment. Repair or replace damaged wires or equipment.
The work in this service bulletin is done in the maintenance zone(s) given below. **Group 1:**
**Affected Maintenance Zones Zone**  **Model** 211, 212, 221, 222 767-200, 767-300, 767-300F **Group 2:**
**Affected Maintenance Zones Zone**  **Model** 211, 212, 221, 222 767-400ER **E. Compliance** The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Boeing recommends that the Inspection/Interval Test given in this service bulletin be done every 100 flight hours. **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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 16 of 27 **BOEING SERVICE BULLETIN 767-28-0106 G. Manpower**  The table below shows an estimate of the task hours necessary to do this for each . 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 inspect the work • Time to cure the materials • Time to make the parts • Time to find the tools. **Elapsed Hours Task Hours**  **Number of Persons Task**  0.25 0.25 1 Open Access 0.50 0.50 1 Test 0.25 0.25 1 Close Access 1.00 1.00 TOTAL FOR EACH AIRPLANE
**H. Weight and Balance Changes** None. **I. Electrical Load Data** Not changed. **J. References** 1. Existing Data a. Boeing Service Related Problem (SRP) 757/767-SRP-28-0124 b. Standard Wiring Practices Manual (SWPM) 20-10-11, 20-10-12, 20-10-19 c. 767 Aircraft Maintenance Manual (AMM) 24-22-00 d. 767 Fault Isolation Manual (FIM) 28-41-00 e. 767 Wiring Diagram Manual (WDM) 28-41-13
2. Data supplied with this Service Bulletin None. 3. Installation Drawings Used in the Preparation of this Service Bulletin None.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 17 of 27 **BOEING SERVICE BULLETIN 767-28-0106 K. Publications Affected**  1. Publications: None. 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** Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 18 of 27 **BOEING SERVICE BULLETIN 767-28-0106 2. MATERIAL INFORMATION**  **A. Material - Price and Availability** None. **B. Industry Support Information** Boeing warranty remedies are not available for the Inspection/Interval Test given in this service bulletin. **C. Parts Necessary For Each Airplane** 1. Kits/Parts None. 2. Parts and Materials Supplied by the Operator None. 3. Parts Modified and Reidentified 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 19 of 27 **BOEING SERVICE BULLETIN 767-28-0106**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 20 of 27 **BOEING SERVICE BULLETIN 767-28-0106**

BLANK PAGE**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. The instructions identified in Paragraph 3.B., Work Instructions, and the Figure(s) give the recommended sequence of steps. The sequence of steps to do this service bulletin can be changed. 2. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for definition of the acronyms. 3. Obey all of the warnings and cautions given in the specified manual sections. 4. 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. 5. A Detailed Inspection is defined as: An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors, magnifying lenses, etc. may be necessary. Surface cleaning and elaborate procedures may be required. 6. A General Visual Inspection is defined as: A visual examination of an interior or exterior area, installation or assembly to detect obvious damage, failure or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to enhance visual access to all exposed surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight or drop-light and may require removal or opening of access panels or doors. Stands, ladders or platforms may be required to gain proximity to the area being checked. 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. **B. WORK INSTRUCTIONS** 1. **Group 1:** PART 1 - Test. a. Supply electrical power. Refer to 767 AMM 24-22-00 as an accepted procedure. b. Make sure the following six EICAS circuit breakers are closed.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 21 of 27 **BOEING SERVICE BULLETIN 767-28-0106 EICAS CIRCUIT BREAKERS, P11 PANEL** 
**LOCATION PANEL**  **NAME CIRCUIT**  **BREAKER** J2 P11-2 EICAS, L CMPTR C4078 J29 P11-5 EICAS, R CMPTR C4079 J32 P11-5 EICAS DISPLAY SELECT C4094 J31 P11-5 EICAS DISPLAY SWITCHING C4189 J30 P11-5 EICAS LOWER DISPLAY C4082 J3 P11-2 EICAS UPPER DSPL C4081

c. Do the Test in accordance with FIGURE 1. **NOTE:** If the test fails, trouble shoot for wire faults, bent connector pins, or damaged equipment. Refer to Fault isolation Manual 767 FIM 28-41-00 as an accepted procedure, and to Wire Diagram Manual 767 WDM 28-41-13 for related wires. d. Put the airplane back to a serviceable condition.

2. **Group 2:** PART 2 - Test. a. Supply electrical power. Refer to 767 AMM 24-22-00 as an accepted procedure. b. Make sure the following ten LFDS circuit breakers are closed. **LFDS CIRCUIT BREAKERS, P11 PANEL**
**LOCATION PANEL**  **NAME CIRCUIT**  **BREAKER** A6 P11-1 DISPLAY UNIT UPPER CENTER C1817 H3 P11-2 DISPLAY UNIT LOWER CENTER C1818 H5 P11-2 DISPLAY PROCESSING COMPUTER - LEFT C1826 J31 P11-5 DISPLAY PROCESSING COMPUTER - RIGHT C1825 A7 P11-1 DISPLAY PROCESSING COMPUTER - CENTER C1824 J27 P11-5 DISPLAY SELECT PANEL C1821 E3 P11-1 PANEL DATA CONCENTRATOR UNIT - LEFT C1811 E4 P11-1 PANEL DATA CONCENTRATOR UNIT - RIGHT C1812 D3 P11-1 DATA CONCENTRATOR UNIT - LEFT C1823 J30 P11-5 DATA CONCENTRATOR UNIT - RIGHT C1822

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 22 of 27 **BOEING SERVICE BULLETIN 767-28-0106**c. Do the Test in accordance with FIGURE 2. **NOTE:** If the test fails, trouble shoot for wire faults, bent connector pins, or damaged equipment. Refer to Fault isolation Manual 767 FIM 28-41-00 as an accepted procedure, and to Wire Diagram Manual 767 WDM 28-41-13 for related wires. d. Put the airplane back to a serviceable condition.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 23 of 27 **BOEING SERVICE BULLETIN 767-28-0106 This Figure applies only to: Group 1.** 

**FIGURE 1: (SHEET 1 OF 2)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 24 of 27 **BOEING SERVICE BULLETIN 767-28-0106**Test the FUEL CONFIG Light and the LOW FUEL Message.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  (a)

- - CAUTION/CANCEL Button Push 1 (b)

- - FUEL QTY Test Switch Push 2 (c)

- - FUEL CONFIG Light Locate (d)

- - EICAS, LOW FUEL Caution Message Locate (a) Push the CAUTION Cancel button on the P1-3, Captain Instrument Panel, Right, to reset EICAS caution and advisory messages. (b) Put the FUEL QTY test switch in the FUEL QTY position and release. ( located on the (M10398) P61 Panel) (c) Make sure the FUEL CONFIG light comes on. ( P5, Pilot's Overhead Panel ) (d) Make sure the LOW FUEL message shows. ( Upper EICAS Display )

**FIGURE 1: (SHEET 2 OF 2)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 25 of 27 **BOEING SERVICE BULLETIN 767-28-0106 This Figure applies only to: Group 2.** 

**FIGURE 2: (SHEET 1 OF 2)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 26 of 27 **BOEING SERVICE BULLETIN 767-28-0106**Test the FUEL CONFIG Light and the LOW FUEL Message for LFDS Airplanes.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  (a)

- - CANC/RCL Button Push 1 (b)

- - FUEL QTY Test Switch Push 2 (c)

- - FUEL CONFIG Light Locate (d)

- - EICAS, LOW FUEL Caution Message Locate (a) Push the CANC/RCL button on the, Display Select Panel, P55, Center Glareshield, to reset crew alert messages. (b) Put the FUEL QTY test switch in the FUEL QTY position and release. ( located on the (M10398) P61 Panel ) (c) Make sure the FUEL CONFIG light comes on. ( P5, Pilot's Overhead Panel ) (d) Make sure the LOW FUEL message shows.( Upper EICAS Display )
**NOTE:** The Large Format Display System, (LFDS), replaces the EICAS system and interfaces with the FQIS System on 767-400ER airplanes.

**FIGURE 2: (SHEET 2 OF 2)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: August 25, 2010 767-28-0106 27 of 27 **BOEING SERVICE BULLETIN 767-28-0106**