### Commercial **Airplanes** 

# 777 Service Bulletin **ALERT Number: 777-22A0024**  Original Issue: January 22, 2010 ATA System: 2211 **SUBJECT:** AUTOFLIGHT - Autopilot Flight Director System - Install Autopilot Flight Director Computer Operational Program Software 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## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 1 of 17 3.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 2 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT**

BLANK PAGE**Table of Contents** Summary...................................................... 5 1. PLANNING INFORMATION ........................................ 7 A. Effectivity................................................ 7 1. Airplanes............................................. 7 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 B. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 H. Weight and Balance Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1. Existing Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2. Data supplied with this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3. Installation Drawings Used in the Preparation of this Service Bulletin. . . . . . . . . . . . 13 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2. MATERIAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 C. Parts Necessary For Each Airplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2. Parts and Materials Supplied by the Operator. . . . . . . . . . . . . . . . . . . . . . . . 15 3. Parts Modified and Reidentified. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4. Parts Removed and Not Replaced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 D. Parts Necessary to Change Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 F. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . 16 3. ACCOMPLISHMENT INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 B. WORK INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 3 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 4 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT**

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### Commercial **Airplanes** 

# 777 Service Bulletin **ALERT Summary**  **Number: 777-22A0024** Original Issue: January 22, 2010 ATA System: 2211 **SUBJECT:** AUTOFLIGHT - Autopilot Flight Director System - Install Autopilot Flight Director Computer Operational Program Software THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. **CONCURRENT REQUIREMENTS** None. **BACKGROUND** This service bulletin gives the part number and installation instructions for the new Operational Program Software (OPS) for the Autopilot Flight Director Computer (AFDC). The new software changes the autopilot engagement logic to make sure the flight crew will not engage the autopilot by mistake prior to the takeoff roll. The new software also improves Autopilot/Flight Director performance during performance limited go-arounds with one engine inoperative. The consequence for not incorporating this service bulletin is that airlines may experience inadvertent engagement of autopilot leading to rejected take-off and a lower climb gradient than is optimal for obstacle clearance during performance limited go-arounds. Since 1995 there have been nine reported instances of a rejected takeoff because of higher than normal control column forces at takeoff rotation due to the pilot inadvertently engaging the autopilot in lower-speed takeoff roll. When the flight crew inadvertently engages the autopilot on ground during the lower-speed phase of the takeoff roll, the control column forces will be higher than normal when the pilot attempts to initiate the takeoff rotation. This can result in a rejected takeoff at rotation speed and a consequent possibility of a runway overrun. The new software will disengage the autopilot whenever the flaps are extended and the airplane is on the ground and not in rollout mode. The autopilot is inhibited when the flaps are extended and the airplane is on the ground or below 50 feet Above Ground Level (AGL). The autopilot is not inhibited if the radio altimeter or Flap Slat Electronic Unit (FSEU) data is invalid. Boeing discovered during flight simulations the climb gradient is less than optimal for obstacle clearance during a one-engine takeoff situation. The new software maintains the initial engine-out go-around pitch target for a longer duration to minimize altitude loss during the go-around. It also targets a velocity to maximize climbout performance. Boeing Service Related Problem (SRP) 777-SRP-22-0030 and 777-SRP-22-0031 are related to this service bulletin.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 5 of 17**ACTION (PRR 62777-66S)** Install new AFDC OPS in the left, center, and right AFDCs. **NOTE:** New AFDC OPS can only be installed in AFDC 822-0006-103, -104, or -105. **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. Boeing recommends that the change given in this service bulletin be done within 12 months after the original issue date of this service bulletin. **INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are available for airplanes in warranty as of December 04, 2008. Please refer to Paragraph 2.B., Industry Support Information. **MANPOWER Elapsed Hours**  **Total Task Hours Airplanes**  1.50 1.50 Group 1
**MATERIAL INFORMATION** Operator Supplied Parts/Materials. Refer to Paragraph 2.A., Material - Price and Availability

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 6 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT**

### Commercial **Airplanes** 

# 777 Service Bulletin **ALERT Number: 777-22A0024**  Original Issue: January 22, 2010 ATA System: 2211 **SUBJECT:** AUTOFLIGHT - Autopilot Flight Director System - Install Autopilot Flight Director Computer Operational Program Software THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. **1. PLANNING INFORMATION A. Effectivity**  1. Airplanes Refer to Service Bulletin Index Document D624W001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. This service bulletin is for the airplanes shown below. An equivalent change is on subsequent production airplanes. Refer to PRR 62777-66S for data about this change.
**DESCRIPTION CONFIGURATION**  **GROUP** 777-200/200LR/300/300ER/F

- 1

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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 7 of 17**Group Variable Number**  1 WA171 - WA175 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

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 8 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT Group**  **Variable Number** 1 WB481 - WB484 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 - WC222 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 WD001 - WD002 1 WD011 - WD018 1 WD031 - WD036

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 9 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT Group**  **Variable Number** 1 WD046 - WD055 1 WD066 - WD073 1 WD081 - WD082 1 WD501 - WD512 1 WD521 - WD541 1 WD546 - WD554 1 WD561 - WD573 1 WD581 - WD599 1 WD606 - WD609 1 WD621 - WD632 1 WD651 - WD663 1 WD671 - WD675 1 WD691 - WD709 1 WD741 - WD752 1 WD761 - WD771 1 WD786 - WD788 1 WD796 - WD807 1 WD826 - WD834 1 WD846 - WD857 1 WD871 - WD877 1 WD911 - WD914 1 WD936 - WD939 1 WD946 - WD947 1 WD966 - WD969 1 WD981 - WD982 1 WF001 - WF003 1 WF016 - WF018 1 WF031 - WF032 1 WF046 1 WF076 - WF077 1 WF081 - WF082

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 10 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT**2. Spares Affected None. **B. Concurrent Requirements** None. **C. Reason** This service bulletin gives the part number and installation instructions for the new Operational Program Software (OPS) for the Autopilot Flight Director Computer (AFDC). The new software changes the autopilot engagement logic to make sure the flight crew will not engage the autopilot by mistake prior to the takeoff roll. The new software also improves Autopilot/Flight Director performance during performance limited go-arounds with one engine inoperative. The consequence for not incorporating this service bulletin is that airlines may experience inadvertent engagement of autopilot leading to rejected take-off and a lower climb gradient than is optimal for obstacle clearance during performance limited go-arounds. Since 1995 there have been nine reported instances of a rejected takeoff because of higher than normal control column forces at takeoff rotation due to the pilot inadvertently engaging the autopilot in lower-speed takeoff roll. When the flight crew inadvertently engages the autopilot on ground during the lower-speed phase of the takeoff roll, the control column forces will be higher than normal when the pilot attempts to initiate the takeoff rotation. This can result in a rejected takeoff at rotation speed and a consequent possibility of a runway overrun. The new software will disengage the autopilot whenever the flaps are extended and the airplane is on the ground and not in rollout mode. The autopilot is inhibited when the flaps are extended and the airplane is on the ground or below 50 feet Above Ground Level (AGL). The autopilot is not inhibited if the radio altimeter or Flap Slat Electronic Unit (FSEU) data is invalid. Boeing discovered during flight simulations the climb gradient is less than optimal for obstacle clearance during a one-engine takeoff situation. The new software maintains the initial engine-out go-around pitch target for a longer duration to minimize altitude loss during the go-around. It also targets a velocity to maximize climbout performance. Boeing Service Related Problem (SRP) 777-SRP-22-0030 and 777-SRP-22-0031 are related to this service bulletin. **D. Description** Install new AFDC OPS in the left, center, and right AFDCs. **NOTE:** New AFDC OPS can only be installed in AFDC 822-0006-103, -104, or -105. The work in this service bulletin is done in the maintenance zone(s) given below.
**Affected Maintenance Zones Zone**  **Model** 212 777-200, 777-200LR, 777-300, 777-300ER, 777F

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 11 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT 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 change given in this service bulletin be done within 12 months after the original issue date of 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. **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 inspect the work • Time to find the tools. **NOTE:** This estimate gives general service bulletin incorporation time. The specific software data transfer times can be found in 777 AMM 20-15-11. **Elapsed Hours Task Hours**  **Number of Per- sons**  **Task**

1.50 1.50 1 Install Software 1.50 1.50 TOTAL FOR EACH AIRPLANE **H. Weight and Balance Changes** None. **I. Electrical Load Data** Not changed.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 12 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT J. References**  1. Existing Data a. Engineering Change Memo PRR 62777-66S b. Service Related Problem (SRP) 777-SRP-22-0030, 777-SRP-22-0031 c. 777 Maintenance Manual (AMM) Subject 777 AMM 22-11-01, 777 AMM 20-15-11 2. Data supplied with this Service Bulletin None. 3. Installation Drawings Used in the Preparation of this Service Bulletin None. **K. Publications Affected** 1. Publications: **Chapter-Section**

**Publication** Ch 4.20 777 Flight Crew Operations Manual 22-11 777 Maintenance Manual 22-11 777 Fault Isolation Manual 46-00, 46-01 777 Illustrated Parts Catalog 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 13 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 14 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT**

BLANK PAGE**2. MATERIAL INFORMATION A. Material - Price and Availability**  The operator can supply the parts and materials shown in Paragraph 2.C., Parts Necessary for Each Airplane . As an alternative, operators can purchase the parts from Rockwell Collins. **B. Industry Support Information** Boeing warranty remedies are available for 777 airplanes in warranty as of December 04, 2008. For task hour and material reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing Commercial Airplanes Group - Warranties. **C. Parts Necessary For Each Airplane** 1. Kits/Parts None. 2. Parts and Materials Supplied by the Operator
**Notes Software Name**  **Software Part Number Media Set Name**  **Media Set Part Num- ber**  (a) (b) (c) (d) (e) (f) (g) 22 AFDC OPS 2276-COL-AA6-11 22 AFDC OPS Disk Set 831-3215-111

(a) This software part number is used in production. Operators may already have this media set. (b) Do not install previous versions of this software after installation of the new software part number. (c) Do not mix different part numbers of this software on the airplane. All AFDC must contain the new software. (d) Install this software only if AFDC 822-0006-103, -104, or -105 is installed on the airplane. (e) For 777 Passenger Models: The existing media set part number is 831-3215-109. The existing software part number is 227C-COL-AA5-09. (f) For 777 Freighter Models: The existing media set part number is 822-3215-510. The existing software part number is 2277-COL-AA6-10. (g) The media set must be obtained directly from the supplier: Rockwell Collins INC, 400 Collins Road NE, Cedar Rapids, IA 52498-0001
3. Parts Modified and Reidentified None. 4. Parts Removed and Not Replaced None. **D. Parts Necessary to Change Spares** None.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 15 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT 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: January 22, 2010 777-22A0024 16 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT 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. 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. 4. Refer to 777 AMM 20-15-11 for on-airplane software installation maintenance practices and data transfer times, as accepted procedures. **B. WORK INSTRUCTIONS** 1. Install the software shown below. Refer to 777 AMM 22-11-01 as an accepted procedure.
**Media Set Part Number Software Part Number**  **Software Name** 831-3215-111 2276-COL-AA6-11 22 AFDC OPS 2. Put the airplane back to a serviceable condition.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: January 22, 2010 777-22A0024 17 of 17 **BOEING SERVICE BULLETIN 777-22A0024 ALERT**  **ALERT**