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Commercial Airplanes 767 Service Bulletin ALERT Number: 767-34A0828 Original Issue: December 06, 2018 ATA System: 3412 SUBJECT: NAVIGATION - Air Data Computing System - Angle of Attack Sensor Inspection and 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.
9E991ECCN:
Copyright © 2018 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Unpublished Work.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: December 06, 2018 767-34A0828 1 of 29
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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected15
B. Concurrent Requirements15
C. Reason15
D. Description16
E. Compliance16
F. Approval17
G. Manpower18
H. Weight and Balance Changes19
I. Electrical Load Data19
J. References20
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 Affected20
L. Interchangeability and Intermixability of Parts20
M. Software Accomplishment Summary20
2. MATERIAL INFORMATION21
A. Material - Price and Availability21
B. Industry Support Information21
C. Parts Necessary for Each Airplane21
1. Kits/Parts21
2. Parts and Materials Supplied by the Operator21
3. Parts Modified and Reidentified22
4. Parts Removed and Not Replaced22
D. Parts Necessary to Change Spares22
E. Special Tooling - Price and Availability22
F. Special Tooling Necessary to do this Service Bulletin22
3. ACCOMPLISHMENT INSTRUCTIONS23
A. GENERAL INFORMATION23
B. WORK INSTRUCTIONS24
FIGURE 1: AREA OUTBOARD AND ABOVE NOSE LANDING GEAR WHEEL WELL - INSPECT LEFT
ANGLE OF ATTACK SENSOR - SLINGER26
FIGURE 2: AREA OUTBOARD AND ABOVE NOSE LANDING GEAR WHEEL WELL - INSPECT RIGHT
ANGLE OF ATTACK SENSOR - SLINGER27
FIGURE 3: AREA OUTBOARD AND ABOVE NOSE LANDING GEAR WHEEL WELL - INSPECT LEFT
ANGLE OF ATTACK SENSOR - PART NUMBER28
FIGURE 4: AREA OUTBOARD AND ABOVE NOSE LANDING GEAR WHEEL WELL - INSPECT RIGHT
ANGLE OF ATTACK SENSOR - PART NUMBER29
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Commercial Airplanes 767 Service Bulletin ALERT SummaryNumber: 767-34A0828Original Issue: December 06, 2018 ATA System: 3412 SUBJECT: NAVIGATION - Air Data Computing System - Angle of Attack Sensor Inspection and Replacement
THIS DOCUMENT 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 DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER.
CONCURRENT REQUIREMENTS None.
BACKGROUND Boeing has received reports from operators of nuisance stick shaker activation while the airplane is accelerating to cruise speed at the top of a climb. A review of recorded flight data and weather reports indicated that the cause of the nuisance stick shakers was that the Angle of Attack (AOA) sensor vanes were frozen and had become immobilized because the heaters in the AOA sensor were not sufficient to prevent ice build-up in the faceplate and vane. This can be caused during heavy moisture conditions leading to water entering the AOA vane pivot and freezing during takeoff. If this service bulletin is not done, AOA sensors can freeze and become immobilized, which can lead to an unrecoverable stall at low altitude, which can result in unsafe flight conditions.
This service bulletin gives instructions to inspect the left and right AOA sensor part numbers. Also, instructions are given to replace existing AOA sensors that have heaters that are not sufficient to prevent ice build-up faceplate and vane. Installation of new or serviceable AOA sensor(s) prevents immobilization of the AOA sensor vane because of ice build-up.
Boeing Service Related Problem (SRP) 767-SRP-34-0141 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 767 FTD 34-15002 is related to this service bulletin.
Boeing Service Letter (SL) 767-SL-34-122-D is related to this service bulletin.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Paragraph 1.E., ComplianceYesAD Related Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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ReferenceAffectedPlanning Data Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedYesPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION (PRR B12901-125S) At the area outboard and above nose landing gear wheel well, do the following:
1. Inspect the left and right AOA sensor.
2. If an AOA sensor has an incorrect part number, replace it with a new or serviceable AOA sensor.
3. If an AOA sensor has a correct part number, no AOA sensor replacement is required.
EFFECTIVITY 767-200, 767-300, 767-300F and 767-400ER Airplane(s). Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).
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 not available for the configuration changes given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Operator Supplied Parts/Materials.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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BOEING SERVICE BULLETIN 767-34A0828
ALERT ALERT Refer to Paragraph 2.A., Material - Price and Availability.
•00c > AT THE AREA OUTBOARD AND VE NOSE LANDING GEAR WHEEL WELL:
- INSPECT THE LEFT AND RIGHT A LE OF ATTACK SENSORS
- REPLACE THE ANGLE OF ATTACK SENSORS IF IT IS AN INCORRECT PART NUMBER LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE 2830209
ANGLE OF ATTACK SENSOF Original Issue: December 06, 2018 Export Controlled ECCN: 9E991 767-34A0828 Copyright © Unpublished Work - See page 1 for details. 7 of 29
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Commercial Airplanes 767 Service Bulletin ALERT Number: 767-34A0828 Original Issue: December 06, 2018 ATA System: 3412 SUBJECT: NAVIGATION - Air Data Computing System - Angle of Attack Sensor Inspection and Replacement
THIS DOCUMENT 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 DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This bulletin is applicable to 767-200, 767-300, 767-300F, 767-400ER Airplane(s), line number(s) 1-717, 719-922, 924-1064, 1068, 1070-1090, 1093-1097, 1099, 1101, 1103, 1105-1106, 1108, 1110, 1112, 1115, 1118, 1121, 1123, 1125, 1127, 1130, 1133, 1136, 1138, 1140-1142, 1144, 1146, 1148, 1150, 1152-1153 in 1 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane applicability means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive.
Refer to Service Bulletin Index D624T001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is applicable to 767-200, 767-300, 767-300F and 767-400ER Airplanes in 1 Group. The Variable Numbers and Group Information for the applicable airplanes is given below.
An equivalent change is on subsequent production airplanes. Refer to PRR B12901-125S for data about this change.
DESCRIPTIONCONFIGURATIONGROUP Airplanes that require inspection of the left and right Angle of Attack (AOA) sensors and replacement of the AOA sensors as necessary.
-1 Airplane Models:
767-200, 767-300, 767-300F, 767-400ER Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1VA001 - VA020 1VA301 - VA315 1VA501 - VA530 1VA701 - VA719 1VA801 - VA810 1VB001 - VB002 1VB051 - VB055 1VB101 - VB125 1VB201 - VB202 1VB251 - VB253 1VB281 - VB284 1VB301 - VB302 1VB321 - VB332 1VB371 - VB373 1VB401 1VB441 - VB444 1VE001 - VE003 1VE021 - VE023 1VE041 - VE043 1VE061 - VE069 1VE083 - VE086 1VE101 - VE104 1VE116 - VE118 1VE121 - VE126 1VE141 - VE152 1VE171 - VE172 1VF001 - VF002 1VF041 - VF042 1VF051 1VF061 - VF062 1VF071 - VF072 1VF091 - VF093 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1VF101 - VF102 1VF161 - VF162 1VF171 - VF172 1VF180 - VF184 1VF251 1VK001 - VK016 1VK021 - VK022 1VK031 - VK056 1VK081 - VK113 1VK131 - VK133 1VK141 - VK148 1VK161 - VK164 1VK171 1VK181 1VK186 1VL001 - VL006 1VL011 1VL701 - VL703 1VL751 - VL755 1VL806 - VL807 1VL871 - VL873 1VL891 - VL900 1VL911 - VL914 1VL931 - VL932 1VL941 1VN001 - VN041 1VN051 - VN064 1VN081 - VN099 1VN111 - VN127 1VN130 - VN137 1VN151 - VN158 1VN163 - VN168 1VN171 - VN174 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1VN191 - VN198 1VN211 - VN212 1VN221 - VN225 1VN231 - VN234 1VN241 - VN243 1VN251 - VN276 1VN291 - VN293 1VN301 - VN314 1VN371 - VN372 1VN376 1VN381 - VN388 1VN421 - VN427 1VN436 1VN471 - VN472 1VN491 - VN513 1VN531 - VN532 1VN536 - VN537 1VN541 - VN542 1VN546 - VN547 1VN551 1VN556 - VN557 1VN561 - VN562 1VN631 - VN638 1VN651 - VN658 1VN671 - VN672 1VN676 1VN681 - VN691 1VN731 - VN732 1VN751 - VN753 1VN791 - VN792 1VN811 - VN813 1VN921 - VN922 1VN931 - VN936 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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