### Commercial **Airplanes** 

# 777 Service Bulletin **Number: 777-52A0050** Original Issue: June 18, 2013 Revision 1: August 07, 2014 ATA System: 5211 **SUBJECT:** DOORS - Passenger Entry Doors - Girt Bar Floor Fitting - Spring Pin Replacement 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 © 2013 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 Unpublished Work.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, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, 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.

Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 1 of 36 2.0Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 2 of 36 **BOEING SERVICE BULLETIN 777-52A0050**

BLANK PAGE**Table of Contents** Revision Transmittal Sheet............................................ 5 Summary...................................................... 7 1. PLANNING INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 A. Effectivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. Airplanes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2. Spares Affected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 B. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 C. Reason. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 D. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 H. Weight and Balance Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 I. Electrical Load Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 J. References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 1. Existing Data:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2. Data Supplied with this Service Bulletin:. . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3. Installation Drawings Used in the Preparation of this Service Bulletin:. . . . . . . . . . . 20 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 L. Interchangeability and Intermixability of Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 21 M. Software Accomplishment Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2. MATERIAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 B. Industry Support Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 C. Parts Necessary for Each Airplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 1. Kits/Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2. Parts and Materials Supplied by the Operator. . . . . . . . . . . . . . . . . . . . . . . . 24 3. Parts Modified and Reidentified. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4. Parts Removed and Not Replaced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 D. Parts Necessary to Change Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 F. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . 25 3. ACCOMPLISHMENT INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 A. GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 B. WORK INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 FIGURE 1: PASSENGER ENTRY DOOR - GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT [Group 1]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 FIGURE 2: PASSENGER ENTRY DOOR - GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT [Group 2]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 FIGURE 3: GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT. . . . . . . . . . . . . . . . 35

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 3 of 36 **BOEING SERVICE BULLETIN 777-52A0050**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 4 of 36 **BOEING SERVICE BULLETIN 777-52A0050**

BLANK PAGE

### Commercial **Airplanes** 

# 777 Service Bulletin **Revision Transmittal Sheet Number: 777-52A0050**  Original Issue: June 18, 2013 Revision 1: August 07, 2014 ATA System: 5211 **SUBJECT:** DOORS - Passenger Entry Doors - Girt Bar Floor Fitting - Spring Pin Replacement This revision includes all pages of the service bulletin. **COMPLIANCE INFORMATION RELATED TO THIS REVISION** No more work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin. **REASON FOR REVISION** This revision is sent to add instructions to modify parts found in spares, add instruction to identify modified parts and to add an Aircraft Maintenance Manual reference. These sections were changed: 1. Action and Description - Instructions for new component work is added. 2. Summary Manpower - Manpower times are updated. 3. Paragraph, 1.C., Reason - Reason for Revision 1 was added. 4. Paragraph 1.E., Compliance - Compliance action is updated. 5. Paragraph, 1.G., Manpower - Estimates were changed. 6. Paragraph, 1.J., References - Added new references. 7. Paragraph, 1.K., Publications affected - Added new publications. 8. Paragraph, 2.B. Industry Support Information - Boeing warranty statement is updated. 9. Paragraph, 3.B., Work Instructions - Instructions added to modify components and an AMM reference is added. 10. Figures 1 and 2 - Part mark instructions added. 11. New Figure 3 was added. The data given in Information Notice 777-52A0050 IN 01 is included in this revision. IN01 was sent to include an additional AMM reference in Paragraph 3.B.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 5 of 36Vertical 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 18, 2013 Original Issue: August 07, 2014 Revision 1:

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 6 of 36 **BOEING SERVICE BULLETIN 777-52A0050**

### Commercial **Airplanes** 

# 777 Service Bulletin **Summary Number: 777-52A0050**  Original Issue: June 18, 2013 Revision 1: August 07, 2014 ATA System: 5211 **SUBJECT:** DOORS - Passenger Entry Doors - Girt Bar Floor Fitting - Spring Pin Replacement **CONCURRENT REQUIREMENTS** None. **BACKGROUND** This service bulletin gives instructions to replace the existing girt bar floor fitting spring pins at the passenger entry doors with new spring pins that have improved resistance to stress corrosion cracking. If the work given in this service bulletin is not done, the existing girt bar floor fitting spring pins could develop stress corrosion cracks and eventually migrate or break. Broken or migrated girt bar floor fitting spring pins could prevent one or more passenger entry door escape slides from deploying properly during an emergency. If escape slides do not deploy properly during an emergency, delayed evacuation and serious injury to cabin occupants could occur. Four operators have reported a total of 23 corroded, migrated, or broken girt bar floor fitting spring pins on nine different airplanes. One of the operators reported that a broken girt bar floor fitting spring pin prevented a door escape slide from deploying during a maintenance test. Boeing has completed analysis on three broken spring pins and has determined that the spring pins failed due to stress corrosion cracking. Accomplishment of this service bulletin will ensure that the girt bar floor fitting spring pins are free of stress corrosion cracking that could prevent proper escape slide deployment during an emergency. The new spring pin material has demonstrated sufficient service life when used in similar applications on other Boeing model airplanes. Boeing Fleet Team Digest (FTD) article 777 FTD 52-12002 is related to this service bulletin. Boeing Service Related Problem (SRP) 777-SRP-52-0102 is related to this service bulletin. This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
**Reference Affected**  **Planning Data** Paragraph 1.A.2., Spares Affected Yes Spares Affected Paragraph 1.E., Compliance and Paragraph 1.F., Approval Yes AD Related Paragraph 1.H., Weight and Balance Changes No Weight and Balance Change

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 7 of 36**Reference Affected**  **Planning Data** Paragraph 1.I., Electrical Load Data No Electrical Load Changed Paragraph 1.K., Publications Affected Yes Publications Affected Paragraph 1.K., Publications Affected No Airplane Flight Operations Affected (Flight CrewOperations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/Parts Yes Kits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator No Operator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin No Special Tooling Required

**ACTION (PRR 62777-90S)** PART 1: AIRPLANE WORK At each of the passenger entry doors on the airplane, remove the girt bar floor fitting spring pins. Install new girt bar floor fitting spring pins that have improved resistance to stress corrosion cracking. Accomplish all actions in accordance with Paragraph 1.E., Compliance. PART 2: COMPONENT WORK Remove the girt bar floor fitting spring pins. Install new girt bar floor fitting spring pins that have improved resistant to stress corrosion cracking. **EFFECTIVITY** 777-200, 777-200LR, 777-300, 777-300ER, and 777F 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. Refer to Paragraph 1.E., Compliance. **INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are available for airplanes in warranty as of March 14, 2012. Please refer to Paragraph 2.B., Industry Support Information. The warranty remedies will expire eight years from the original issue date of this service bulletin. **MANPOWER Elapsed Hours**  **Total Task Hours Airplanes**  14.00 14.00 Group 1

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 8 of 36 **BOEING SERVICE BULLETIN 777-52A0050 Elapsed Hours**  **Total Task Hours Airplanes**  3.5 3.5 Group 2
**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 18, 2013 777-52A0050 Revision 1: August 07, 2014 9 of 36 **BOEING SERVICE BULLETIN 777-52A0050**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 10 of 36 **BOEING SERVICE BULLETIN 777-52A0050**

### Commercial **Airplanes** 

# 777 Service Bulletin **Number: 777-52A0050** Original Issue: June 18, 2013 Revision 1: August 07, 2014 ATA System: 5211 **SUBJECT:** DOORS - Passenger Entry Doors - Girt Bar Floor Fitting - Spring Pin Replacement **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 applicable to 777-200, 777-200LR, 777-300, 777-300ER and 777F airplanes, line numbers 1 through 1134, in 2 Groups. The Variable Numbers and Group Information for the applicable airplanes is given below. An equivalent change is on subsequent production airplanes. Refer to PRR PRR 62777-90S for data about this change.
**DESCRIPTION CONFIGURATION**  **GROUP** 777-200, 777-200LR, 777-300, and 777-300ER airplanes, line numbers 1 through 1134. - 1
777F airplanes, line numbers 1 through 1134.

- 2

Airplane Models: 777-200, 777-200LR, 777-300, 777-300ER, 777F **Group Variable Number**  1 WA001 - WA017 1 WA076 - WA080 1 WA086 - WA093 1 WA101 - WA104 1 WA116 - WA119 1 WA131 - WA137 1 WA171 - WA175

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 11 of 36**Group Variable Number**  1 WA196 - WA198 1 WA206 - WA212 1 WA221 - WA223 1 WA231 - WA232 1 WA241 - WA250 1 WA261 - WA266 1 WA281 - WA283 1 WA301 - WA304 1 WB001 - WB021 1 WB031 - WB046 1 WB051 - WB088 1 WB101 - WB106 1 WB121 - WB125 1 WB131 - WB148 1 WB151 - WB155 1 WB161 - WB177 1 WB181 - WB194 1 WB201 - WB215 1 WB231 - WB247 1 WB271 - WB273 1 WB276 - WB286 1 WB291 - WB302 1 WB306 - WB307 1 WB311 - WB337 1 WB341 - WB342 1 WB366 - WB368 1 WB371 - WB388 1 WB406 1 WB411 - WB413 1 WB416 - WB439 1 WB446 - WB453 1 WB476 1 WB481 - WB484

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 12 of 36 **BOEING SERVICE BULLETIN 777-52A0050 Group**  **Variable Number** 1 WB501 - WB512 1 WB531 - WB537 1 WB551 - WB554 1 WB591 - WB597 1 WB601 - WB606 1 WB611 - WB622 1 WB631 - WB638 1 WB646 - WB649 1 WC051 - WC073 1 WC101 - WC104 1 WC111 - WC120 1 WC221 - WC224 1 WC241 - WC243 1 WC281 - WC290 1 WC301 - WC308 1 WC361 - WC364 1 WC371 - WC374 1 WC381 - WC395 1 WC441 1 WC446 - WC449 1 WC456 - WC459 1 WC486 - WC493 1 WC506 - WC508 1 WC521 - WC522 1 WC531 - WC536 1 WC546 - WC548 1 WC556 1 WC566 - WC567 1 WC571 - WC574 1 WC581 1 WC586 - WC587 1 WC591 - WC595 1 WD001 - WD002

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 13 of 36 **BOEING SERVICE BULLETIN 777-52A0050 Group**  **Variable Number** 1 WD011 - WD018 1 WD031 - WD036 1 WD046 - WD055 1 WD066 - WD075 1 WD081 - WD089 1 WD091 1 WD096 1 WD101 - WD106 1 WD111 1 WD116 - WD117 1 WD501 - WD513 1 WD521 - WD541 1 WD546 - WD554 1 WD561 - WD573 1 WD581 - WD599 1 WD606 - WD609 1 WD621 - WD632 1 WD651 - WD665 1 WD671 - WD677 1 WD691 - WD709 1 WD741 - WD752 1 WD761 - WD771 1 WD786 - WD788 1 WD796 - WD821 1 WD826 - WD837 1 WD846 - WD867 1 WD871 - WD892 1 WD911 - WD918 1 WD921 - WD929 1 WD936 - WD957 1 WD966 - WD970 1 WD981 - WD982 1 WD986 - WD987

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 14 of 36 **BOEING SERVICE BULLETIN 777-52A0050 Group**  **Variable Number** 1 WD991 - WD993 1 WD996 1 WE001 - WE004 1 WE011 - WE012 1 WE021 - WE026 1 WE031 - WE034 1 WE051 - WE055 1 WE071 - WE072 1 WE081 - WE084 1 WE091 - WE094 1 WE126 - WE137 1 WE141 - WE142 1 WE151 - WE166 1 WE176 - WE177 1 WE186 - WE209 1 WE216 - WE217 1 WE226 - WE231 1 WE236 - WE243 1 WE251 - WE253 1 WE261 - WE265 1 WE271 - WE277 1 WE291 1 WE301 - WE309 1 WE331 - WE334 1 WE351 - WE352 1 WE416 - WE417 2 WF001 - WF004 2 WF016 - WF023 2 WF031 - WF038 2 WF046 - WF065 2 WF075 - WF077 2 WF081 - WF088 2 WF096 - WF101

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 15 of 36 **BOEING SERVICE BULLETIN 777-52A0050 Group**  **Variable Number** 2 WF106 - WF109 2 WF111 - WF115 2 WF121 - WF124 2 WF131 - WF133 2 WF136 - WF138 2 WF146 - WF147 2 WF151 - WF152 2. Spares Affected Examine your spares supply for the parts or components identified below. If any parts or components are found, refer to Paragraph 3.B., Work Instructions for the recommended action.
**Part Number** MS39086-261 MS16562-252 131W1830-1107 131W1830-1108 131W1830-1109 131W1830-1110 131W1830-1111 131W1830-1112 131W1830-1113 131W1830-1114 131W1830-1115 131W1830-1116 131W1830-1117 131W1830-1118 **B. Concurrent Requirements** None.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 16 of 36 **BOEING SERVICE BULLETIN 777-52A0050 C. Reason**  This service bulletin gives instructions to replace the existing girt bar floor fitting spring pins at the passenger entry doors with new spring pins that have improved resistance to stress corrosion cracking. If the work given in this service bulletin is not done, the existing girt bar floor fitting spring pins could develop stress corrosion cracks and eventually migrate or break. Broken or migrated girt bar floor fitting spring pins could prevent one or more passenger entry door escape slides from deploying properly during an emergency. If escape slides do not deploy properly during an emergency, delayed evacuation and serious injury to cabin occupants could occur. Four operators have reported a total of 23 corroded, migrated, or broken girt bar floor fitting spring pins on nine different airplanes. One of the operators reported that a broken girt bar floor fitting spring pin prevented a door escape slide from deploying during a maintenance test. Boeing has completed analysis on three broken spring pins and has determined that the spring pins failed due to stress corrosion cracking. Accomplishment of this service bulletin will ensure that the girt bar floor fitting spring pins are free of stress corrosion cracking that could prevent proper escape slide deployment during an emergency. The new spring pin material has demonstrated sufficient service life when used in similar applications on other Boeing model airplanes. Boeing Fleet Team Digest (FTD) article 777 FTD 52-12002 is related to this service bulletin. Boeing Service Related Problem (SRP) 777-SRP-52-0102 is related to this service bulletin. Revision 1 is sent to add instructions to modify parts found in spares, add instruction to identify modified parts and to add an Aircraft Maintenance Manual reference. **D. Description** PART 1: AIRPLANE WORK At each of the passenger entry doors on the airplane, remove the girt bar floor fitting spring pins. Install new girt bar floor fitting spring pins that have improved resistance to stress corrosion cracking. Accomplish all actions in accordance with Paragraph 1.E., Compliance. PART 2: COMPONENT WORK Remove the girt bar floor fitting spring pins. Install new girt bar floor fitting spring pins that have improved resistance to stress corrosion cracking. Revision 1 - No more work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin. The work in this service bulletin is done in the maintenance zone(s) given below.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 17 of 36 **BOEING SERVICE BULLETIN 777-52A0050 Group 1:** 
**Affected Maintenance Zones Zone**  **Model** 831, 832, 834, 835, 841, 842, 844, 845 777-200, 777-200LR, 777-300, 777-300ER **Group 2:**
**Affected Maintenance Zones Zone**  **Model** 831, 841 777F **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. Do the required actions in accordance with Paragraph 3. Accomplishment Instructions. **Table 1: Passenger Entry Door - Girt Bar Floor Fitting - Spring Pin Replacement Compliance Time**  **Action Condition**  Within 1175 days after the Original Issue date of this service bulletin.At each passenger entry door location, replace the spring pin at both girt bar floor fittings in accordancewith Paragraph 3.B., Work Instructions, PART 1. All airplanes.

(a) (a) Accomplishment of spring pin replacement at all girt bar floor fitting locations is terminating action for this service bulletin. **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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 18 of 36 **BOEING SERVICE BULLETIN 777-52A0050 G. Manpower**  The table below shows an estimate of the task hours necessary to do this change for each passenger entry door location. 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. **Group 1: PART 1 - AIRPLANE WORK**  **Elapsed Hours Task Hours**  **Number of Persons Task**  0.20 0.20 1 Access 1.50 1.50 1 Figure 1 0.05 0.05 1 Test 1.75 1.75 TOTAL FOR EACH DOOR 14.00 14.00 TOTAL FOR EACH AIRPLANE **Group 2: PART 1 - AIRPLANE WORK**  **Elapsed Hours Task Hours**  **Number of Persons Task**  0.20 0.20 1 Access 1.50 1.50 1 Figure 2 0.05 0.05 1 Test 1.75 1.75 TOTAL FOR EACH DOOR 3.50 3.50 TOTAL FOR EACH AIRPLANE **Group 1: PART 2 - COMPONENT WORK**  **Elapsed Hours Task Hours**  **Number of Persons Task**  0.75 0.75 1 Figure 3 0.75 0.75 TOTAL FOR EACH FITTING **H. Weight and Balance Changes** None.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 19 of 36 **BOEING SERVICE BULLETIN 777-52A0050 I. Electrical Load Data**  Not changed. **J. References** 1. Existing Data: a. Engineering Change Memo PRR 62777-90S b. Boeing Service Related Problem (SRP) 777-SRP-52-0102 c. Service Bulletin Index D624W001 d. Standard Overhaul Practices Manual (SOPM) 20-50-01, 20-50-10 e. 777 Aircraft Maintenance Manual (AMM) 52-11-00, 52-11-18, 52-12-00, 52-12-18 f. 777 Fleet Team Digest (FTD) 52-12002 2. Data Supplied with this Service Bulletin: None. 3. Installation Drawings Used in the Preparation of this Service Bulletin:
**Title Drawing Number**  Emergency System Installation - Passenger Entry Doors 131W1800 The table above lists applicable drawings used to prepare this service bulletin. The drawings are not necessary to make the specified changes, and are not supplied with this service bulletin. The drawings may not be applicable to all airplane configurations or operators. **K. Publications Affected** 1. Publications: **Chapter-Section**

**Publication** 52-11, 52-12, 53-71 777 Illustrated Parts Catalog 52-12-80, 52-11, 52-12 Component Maintenance 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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 20 of 36 **BOEING SERVICE BULLETIN 777-52A0050 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 18, 2013 777-52A0050 Revision 1: August 07, 2014 21 of 36 **BOEING SERVICE BULLETIN 777-52A0050**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 22 of 36 **BOEING SERVICE BULLETIN 777-52A0050**

BLANK PAGE**2. MATERIAL INFORMATION A. Material - Price and Availability**  Boeing can supply the parts 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 parts 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 **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 Part Number** 

0.97 141 1500 (a) Spring Pin BACP18BE16N1000U (a) Boeing expects replacement spring pins to be available immediately after release of the Original Issue of this service bulletin. **B. Industry Support Information** Boeing warranty remedies are available for 777 airplanes in warranty as of March 14, 2012. For task hour reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing Fleet Support Contracts - Warranty. The parts for airplanes in warranty as of that date will be supplied at no charge. Send a purchase order for the parts to Boeing Material Management. Please refer to this service bulletin number and reference the airplane variable number(s) in your purchase order. The warranty remedies will expire eight years from the original issue date of this service bulletin. **C. Parts Necessary for Each Airplane** 1. Kits/Parts To get the kits/parts shown below, refer to Paragraph 2.A., Material - Price and Availability. **NOTE:** The parts shown below and the items shown in Paragraph 2.C.2., Parts and Materials Supplied by the Operator, are necessary for each passenger entry door location on the airplane.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 23 of 36 **BOEING SERVICE BULLETIN 777-52A0050 Notes**  **Existing Part Number**  **Name QTY**  **New Part Number** (a) (b) (c) (d) MS39086-261 or Spring Pin 2 BACP18BE16N1000U MS16562-252(a) The quantity shown is the quantity required to make the change at each passenger entry door. (b) Discard the existing part. (c) The new part is used in production. The new part is required to terminate the required actions in this service bulletin. (d) You cannot use the existing part to replace the new or changed part. 2. Parts and Materials Supplied by the Operator The following parts or materials are necessary to do the change in this service bulletin. Parts and materials in the manuals given in Paragraph 1.J., References, can also be necessary. Examine operator part and material supply to make sure all necessary parts and materials are available.
**Notes Name**  **QTY Part Number /**  **Specification** (a) Grease 1 ounce BMS 3-33 (a) Refer to the Qualified Products List at the end of the Boeing Material Specification (BMS) for supplier data.
3. Parts Modified and Reidentified
**Notes New Part Number**  **Name QTY**  **Existing Part Number**  (b) (c)

- Passenger Entry Door - Girt Bar Mechanism - Floor Fitting Assy 2 (a) 131W1830-( )

(a) Two parts are changed at each passenger entry door location. (b) Make the change in accordance with this service bulletin. (c) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. 4. Parts Removed and Not Replaced None. **D. Parts Necessary to Change Spares** To get the parts shown below, 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 18, 2013 777-52A0050 Revision 1: August 07, 2014 24 of 36 **BOEING SERVICE BULLETIN 777-52A0050 QTY**  **Name Part Number**  1 (a) Spring Pin BACP18BE16N1000U (a) One part is necessary for each 131W1830-( ) Passenger Entry Door - Girt Bar Mechanism - Floor Fitting Assy found in operators inventory. **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 18, 2013 777-52A0050 Revision 1: August 07, 2014 25 of 36 **BOEING SERVICE BULLETIN 777-52A0050**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 26 of 36 **BOEING SERVICE BULLETIN 777-52A0050**

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. 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 and fasteners are in Structural Repair Manual (SRM) Chapter 51 – Torque limits to tighten nuts and bolts are in SRM Chapter 51 4. Use the approved fastener and process material substitutions in accordance with SRM Chapter 51. 5. If the length of any fastener specified in this service bulletin does not meet installation standards given in SRM Chapter 51, then a fastener of the same specification, or an approved substitute, with a length which meets the installation standards given in SRM Chapter 51 may be used. In addition, washers may be installed for fastener grip length in accordance with SRM Chapter 51. Refer to SOPM 20-50-01 for alternate full threaded fasteners (screws) needed for installation in this service bulletin. 6. 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. 7. 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. 8. Where the work instructions include installation of a kept part, a new or serviceable part with the same part number can be installed as an alternative to the kept part. 9. Shaded areas in Figures are to separate the non-critical and non-authoritative information from the critical and authoritative information.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 27 of 36 **BOEING SERVICE BULLETIN 777-52A0050**10. The compliance times for the actions in Paragraph 3.B., WORK INSTRUCTIONS are in Paragraph 1.E., Compliance. **B. WORK INSTRUCTIONS PART 1 - AIRPLANE WORK**  1. Open each of the passenger entry doors. Refer to 777 AMM 52-11-00 or 777 AMM 52-12-00 as an accepted procedure. 2. **Group 1:** At each passenger entry door location, replace the spring pin at both girt bar floor fittings in accordance with FIGURE 1. **NOTE:** Overwing exit doors on 777-300 and 777-300ER airplanes do not have girt bar floor fittings and do not require the change given in this service bulletin. 3. **Group 2:** At each passenger entry door location, replace the spring pin at both girt bar floor fittings in accordance with FIGURE 2. 4. Do a check of the girt bar floor fittings and correct any discrepancies found. Refer to 777 AMM 52-11-18 or 777 AMM 52-12-18 as an accepted procedure. 5. Close each of the passenger entry doors. Refer to 777 AMM 52-11-00 or 777 AMM 52-12-00 as an accepted procedure. 6. Put the airplane back to a serviceable condition. **PART 2 - COMPONENT WORK** 1. Replace the spring pin in each girt bar floor fitting in accordance with FIGURE 3.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1: August 07, 2014 28 of 36 **BOEING SERVICE BULLETIN 777-52A0050 This Figure applies only to: Group 1.** 

**FIGURE 1: PASSENGER ENTRY DOOR - GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT (SHEET 1 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1 August 07, 2014 29 of 36 **BOEING SERVICE BULLETIN 777-52A0050 FIGURE 1: PASSENGER ENTRY DOOR - GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT**  **(SHEET 2 OF 3)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1 August 07, 2014 30 of 36 **BOEING SERVICE BULLETIN 777-52A0050**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each passenger entry door girt bar floor fitting location.
**More Data Qty**  **Identification Name**  **Task Step**  (a) 1 MS39086-261 OR MS16562-252 Existing Spring Pin Remove 1 (a) 1 131W1832-( ) Pawl Remove / Keep (a) 1 131W1836-( ) Spring Remove / Keep (a) (b) (c) 1 131W1836-( ) Spring Install (Kept) 2 (a) (c) 1 131W1832-( ) Pawl Install (Kept) (a) (c) 1 BACP18BE16N1000U Spring Pin Install (New) (d) 1

- Girt Bar Floor Fitting Identify 3 (a) Do this step at each passenger entry door location and each girt bar floor fitting. For Group 1 airplanes, a total quantity of 16 spring pins should be replaced on each airplane. (b) Make sure the spring is oriented as shown. The two free legs of the spring should be nested inside the pawl. The looped end of the spring should sit on the surface of the floor fitting. (c) Apply BMS 3-33 grease to the hole of the pawl and the entire spring pin prior to installation of the spring pin. After spring pin installation, apply a light coating of BMS 3-33 grease to all accessible areas of the spring pin and the spring under the pawl. (d) Identify on the part that the change done in accordance with this service bulletin was made. Refer to SOPM 20-50-10 as an accepted procedure.

**FIGURE 1: PASSENGER ENTRY DOOR - GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT (SHEET 3 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1 August 07, 2014 31 of 36 **BOEING SERVICE BULLETIN 777-52A0050 This Figure applies only to: Group 2.** 

**FIGURE 2: PASSENGER ENTRY DOOR - GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT (SHEET 1 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1 August 07, 2014 32 of 36 **BOEING SERVICE BULLETIN 777-52A0050 FIGURE 2: PASSENGER ENTRY DOOR - GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT**  **(SHEET 2 OF 3)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1 August 07, 2014 33 of 36 **BOEING SERVICE BULLETIN 777-52A0050**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each passenger entry door girt bar floor fitting location.
**More Data Qty**  **Identification Name**  **Task Step**  (a) 1 MS39086-261 OR MS16562-252 Existing Spring Pin Remove 1 (a) 1 131W1832-( ) Pawl Remove / Keep (a) 1 131W1836-( ) Spring Remove / Keep (a) (b) (c) 1 131W1836-( ) Spring Install (Kept) 2 (a) (c) 1 131W1832-( ) Pawl Install (Kept) (a) (c) 1 BACP18BE16N1000U Spring Pin Install (New) (d) 1

- Girt Bar Floor Fitting Identify 3 (a) Do this step at each passenger entry door location and each girt bar floor fitting. For Group 2 airplanes, a total quantity of 4 spring pins should be replaced on each airplane. (b) Make sure the spring is oriented as shown. The two free legs of the spring should be nested inside the pawl. The looped end of the spring should sit on the surface of the floor fitting. (c) Apply BMS 3-33 grease to the hole of the pawl and the entire spring pin prior to installation of the spring pin. After spring pin installation, apply a light coating of BMS 3-33 grease to all accessible areas of the spring pin and the spring under the pawl. (d) Identify on the part that the change done in accordance with this service bulletin was made. Refer to SOPM 20-50-10 as an accepted procedure.

**FIGURE 2: PASSENGER ENTRY DOOR - GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT (SHEET 3 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1 August 07, 2014 34 of 36 **BOEING SERVICE BULLETIN 777-52A0050 FIGURE 3: GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT**  **(SHEET 1 OF 2)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1 August 07, 2014 35 of 36 **BOEING SERVICE BULLETIN 777-52A0050**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each girt bar floor fitting.
**More Data Qty**  **Identification Name**  **Task Step**  1 MS39086-261 OR MS16562-252 Existing Spring Pin Remove 1

1 131W1832-( ) Pawl Remove / Keep 1 131W1836-( ) Spring Remove / Keep (a) 1 131W1836-( ) Spring Install (Kept) 2 (a) 1 131W1832-( ) Pawl Install (Kept) (a) 1 BACP18BE16N1000U Spring Pin Install (New) (b) 1

- Girt Bar Floor Fitting Identify 3 (a) Apply BMS 3-33 grease to the hole of the pawl and the entire spring pin prior to installation of the spring pin. After spring pin installation, apply a light coating of BMS 3-33 grease to all accessible areas of the spring pin and the spring under the pawl. (b) Identify on the part that the change done in accordance with this service bulletin was made. Refer to SOPM 20-50-10 as an accepted procedure.

**FIGURE 3: GIRT BAR FLOOR FITTING - SPRING PIN REPLACEMENT (SHEET 2 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 18, 2013 777-52A0050 Revision 1 August 07, 2014 36 of 36 **BOEING SERVICE BULLETIN 777-52A0050**