# Boeing Alert Service Bulletin 767-78A0100: No revision named

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- Title as filed: U.S. DOT/FAA - SB-767-78A0100-00
- Pages: 26
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## Text

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### Page 1

Commercial 
Airplanes
767
Service Bulletin
ALERT
Number: 767-78A0100
Original Issue: October 26, 2010
ATA System: 7834
SUBJECT: EXHAUST (GE CF6-80 Series Engines) - Thrust Reverser Control System - Short
Flexible Drive Shaft Replacement
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.
9E991ECCN:
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Unpublished Work - All Rights Reserved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.
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Table of Contents
Summary ...................................................... 5
1. PLANNING INFORMATION ........................................ 9
A. Effectivity ................................................ 9
1. Airplanes ............................................. 9
2. Spares Affected ........................................ 1 3
B. Concurrent Requirements ...................................... 1 3
C. Reason ................................................ 1 3
D. Description .............................................. 1 3
E. Compliance .............................................. 1 4
F. Approval ............................................... 1 4
G. Manpower .............................................. 1 4
H. Weight and Balance Changes .................................... 1 5
I. Electrical Load Data ......................................... 1 5
J. References .............................................. 1 5
1. Existing Data .......................................... 1 5
2. Data supplied with this Service Bulletin ............................ 1 6
3. Installation Drawings Used in the Preparation of this Service Bulletin ............ 1 6
K. Publications Affected ........................................ 1 6
L. Interchangeability and Intermixability of Parts ........................... 1 6
2. MATERIAL INFORMATION ........................................ 1 7
A. Material - Price and Availability ................................... 1 7
B. Industry Support Information .................................... 1 7
C. Parts Necessary For Each Airplane ................................. 1 7
1. Kits/Parts ............................................ 1 7
2. Parts and Materials Supplied by the Operator ........................ 1 7
3. Parts Modified and Reidentified ................................ 1 7
4. Parts Removed and Not Replaced .............................. 1 7
D. Parts Necessary to Change Spares ................................. 1 7
E. Special Tooling - Price and Availability ............................... 1 7
F. Special Tooling Necessary to do this Service Bulletin ....................... 1 7
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 9
A. GENERAL INFORMATION ..................................... 1 9
B. WORK INSTRUCTIONS ....................................... 1 9
FIGURE 1: THRUST REVERSER LEFT HALF ELECTRO-MECHANICAL BRAKE - SHORT FLEXSHAFT
REPLACEMENT ........................................ 2 1
FIGURE 2: THRUST REVERSER RIGHT HALF ELECTRO-MECHANICAL BRAKE - SHORT FLEXSHAFT
REPLACEMENT ........................................ 2 4
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Commercial 
Airplanes
767
Service Bulletin
ALERT
SummaryNumber: 767-78A0100Original Issue: October 26, 2010
ATA System: 7834
SUBJECT: EXHAUST (GE CF6-80 Series Engines) - Thrust Reverser Control System - Short
Flexible Drive Shaft Replacement
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
Accomplishment of this service bulletin will prevent damage and the possible breakage of the short flexshafts
related to the electro-mechanical brake of General Electric (GE) CF6-80C2 engines. Flexshaft breakage removes
the primary level of protection against an uncommanded thrust reverser deployment occurrence. Uncommanded
T/R deployment could result in a loss of control of the airplane.
In 1998 operators first told Boeing of unserviceable short flexible drive shafts (also referred to as 'flexshafts')
related to the electro-mechanical brake of the Thrust Reverser Actuation System (TRAS) on GE CF6-80C2
engines. Boeing released service bulletin 767-78A0097 to replace these short flexshafts individually when
necessary. But since the release of that service bulletin, flexshaft damage and breakage has continued to occur.
The performance of the short flexshaft installed by service bulletin 767-78A0097 did not have the necessary
reliability for the system. Since its installation on GE CF6-80C2 engines, short flexshaft part number 3278500-7
has had a number of unserviceable occurrences reported by operators. Similar to the reports described in Boeing
service bulletin 767-78A0097, the unserviceable flexshafts were found to have cores that had become sheared
and unbraided. The manufacturer of the engines, General Electric (GE), and Middle River Aircraft Systems
(MRAS), the supplier of the T/R, have changed the design and supplier of the flexshafts. The flexshaft design
change incorporates a better end fitting attachment, a larger core diameter with the core wound specifically for
use on a left and right T/R half to increase its resistance to damage. The incorporation of this service bulletin is
the recommended alternative to Boeing service bulletin 767-78A0097.
This service bulletin, together with MRAS service bulletin CF6-80C2 S/B 78-1168, gives instructions to replace
the short flexible drive shaft of each T/R half of each engine. Left and right halves of each T/R will have a new
flexshaft installed that is specific to each half.
Boeing Service Related Problem (SRP) 767-SRP-78-0061 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 767 FTD 78-07001 is related to this service bulletin.
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ACTION (PRR B12901-100S)
Work Package 1 - Prepare the thrust reverser (T/R) and get access the short flexshaft between the
electro-mechanical brake and the upper angle gearbox of each T/R left half. Replace the short flexshaft.
Work Package 2 - Prepare the thrust reverser (T/R) and get access the short flexshaft between the
electro-mechanical brake and the upper angle gearbox of each T/R right half. Replace the short flexshaft.
EFFECTIVITY
767-200/300/300F/400ER Airplanes powered by GE CF6-80C2 engines. Refer to Paragraph 1.A., Effectivity
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 60 months after the original
issue date of this service bulletin.
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.
Refer to Paragraph 2.A., Material - Price and Availability.
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### Page 7 (OCR)

BOEING SERVICE BULLETIN 767-78A0100
ALERT  ALERT
REPLACE THE SHORT
FLEXSHAFT BETWEEN THE
ELECTRO-MECHANICAL
BRAKE AND THE UPPER
ANGLE GEARBOX ON EACH
T/R HALF OF EACH ENGINE.
HRUST REVERSER (T/F  1994538
_EFT HALF SHOWN, RIGHT HALF ÓPPOSITE
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Commercial 
Airplanes
767
Service Bulletin
ALERT
Number: 767-78A0100
Original Issue: October 26, 2010
ATA System: 7834
SUBJECT: EXHAUST (GE CF6-80 Series Engines) - Thrust Reverser Control System - Short
Flexible Drive Shaft Replacement
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 D624T001 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 B12901-100S for data about this change.
DESCRIPTIONCONFIGURATIONGROUP
767-200/300/300F/400ER airplanes powered by General Electric
(GE) CF6-80C2 engines
-1
Airplane Models:
767-200, 767-300, 767-300F, 767-400ER
GroupVariable Number
1VB331 - VB332
1VB441 - VB444
1VE121 - VE126
1VE141 - VE149
1VE151 - VE152
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GroupVariable Number
1VF001 - VF002
1VF041 - VF042
1VF051
1VF171 - VF172
1VF180 - VF184
1VF251
1VK012 - VK016
1VK081 - VK082
1VK084 - VK113
1VK131 - VK133
1VK141 - VK148
1VK181
1VK186
1VL001 - VL006
1VL701 - VL703
1VL751 - VL755
1VL891 - VL900
1VL911 - VL914
1VL941
1VN001 - VN041
1VN051 - VN064
1VN081 - VN099
1VN191 - VN198
1VN231 - VN234
1VN291 - VN293
1VN301 - VN314
1VN421 - VN427
1VN436
1VN471 - VN472
1VN546 - VN547
1VN634 - VN638
1VN651 - VN658
1VN676
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GroupVariable Number
1VN731 - VN732
1VN751 - VN753
1VN791 - VN792
1VN811 - VN813
1VN921 - VN922
1VN951 - VN953
1VN968 - VN970
1VQ001 - VQ021
1VQ071 - VQ086
1VQ111
1VR051 - VR060
1VR081
1VR084
1VR086 - VR089
1VR106 - VR109
1VR201 - VR211
1VR251
1VR256 - VR260
1VR266 - VR272
1VR401
1VR426
1VR441
1VR461
1VS051 - VS056
1VS073 - VS078
1VS111 - VS113
1VS131 - VS133
1VS136 - VS137
1VS176 - VS177
1VS186 - VS187
1VS196 - VS203
1VS216 - VS217
1VS231
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GroupVariable Number
1VS261 - VS263
1VS266 - VS274
1VS291 - VS293
1VS316
1VS321 - VS324
1VS331 - VS333
1VS336 - VS337
1VS366 - VS367
1VS381 - VS382
1VS391 - VS392
1VS401
1VS466 - VS472
1VS486
1VS526
1VS546 - VS549
1VS701 - VS736
1VS751 - VS759
1VS861
1VS891
1VS901 - VS910
1VS921 - VS925
1VS931 - VS933
1VS941
1VS951 - VS952
1VS961 - VS962
1VT501
1VT511 - VT513
1VT521 - VT523
1VT531 - VT533
1VT541 - VT543
1VV001
1VW701 - VW721
1VW851
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2. Spares Affected
Examine your spares supply for the parts or components identified in Paragraph 2.C., Parts
Necessary for Each Airplane. If any parts or components are found, refer to Paragraph 2.C. for
the recommended use.
B. Concurrent Requirements
None.
C. Reason
Accomplishment of this service bulletin will prevent damage and the possible breakage of the short
flexshafts related to the electro-mechanical brake of General Electric (GE) CF6-80C2 engines. Flexshaft
breakage removes the primary level of protection against an uncommanded thrust reverser deployment
occurrence. Uncommanded T/R deployment could result in a loss of control of the airplane.
In 1998 operators first told Boeing of unserviceable short flexible drive shafts (also referred to as
'flexshafts') related to the electro-mechanical brake of the Thrust Reverser Actuation System (TRAS)
on GE CF6-80C2 engines. Boeing released service bulletin 767-78A0097 to replace these short
flexshafts individually when necessary. But since the release of that service bulletin, flexshaft damage
and breakage has continued to occur. The performance of the short flexshaft installed by service bulletin
767-78A0097 did not have the necessary reliability for the system. Since its installation on GE CF6-80C2
engines, short flexshaft part number 3278500-7 has had a number of unserviceable occurrences
reported by operators. Similar to the reports described in Boeing service bulletin 767-78A0097, the
unserviceable flexshafts were found to have cores that had become sheared and unbraided. The
manufacturer of the engines, General Electric (GE), and Middle River Aircraft Systems (MRAS), the
supplier of the T/R, have changed the design and supplier of the flexshafts. The flexshaft design change
incorporates a better end fitting attachment, a larger core diameter with the core wound specifically for
use on a left and right T/R half to increase its resistance to damage. The incorporation of this service
bulletin is the recommended alternative to Boeing service bulletin 767-78A0097.
This service bulletin, together with MRAS service bulletin CF6-80C2 S/B 78-1168, gives instructions
to replace the short flexible drive shaft of each T/R half of each engine. Left and right halves of each
T/R will have a new flexshaft installed that is specific to each half.
Boeing Service Related Problem (SRP) 767-SRP-78-0061 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 767 FTD 78-07001 is related to this service bulletin.
D. Description
Work Package 1 - Prepare the thrust reverser (T/R) and get access the short flexshaft between the
electro-mechanical brake and the upper angle gearbox of each T/R left half. Replace the short flexshaft.
Work Package 2 - Prepare the thrust reverser (T/R) and get access the short flexshaft between the
electro-mechanical brake and the upper angle gearbox of each T/R right half. Replace the short flexshaft.
The work in this service bulletin is done in the maintenance zone(s) given below.
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Affected Maintenance Zones
ZoneModel
415, 416, 425, 426767-200, 767-300, 767-300F,
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 change given in this service bulletin be done within 60 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.
In addition, the Manager of the FAA Seattle Aircraft Certification Office approves the action (i.e. inspection
or modification) defined in this service bulletin as an alternative method of compliance to the requirements
of paragraph (c) of AD 2000-09-04. All provisions of AD 2000-09-04 that are not specifically referenced
in the above statement remain fully applicable and must be complied with.
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 service bulletin for each
engine. 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.
WORK PACKAGE 1
Elapsed HoursTask HoursNumber of PersonsTask
0.500.501Open Access
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WORK PACKAGE 1
Elapsed HoursTask HoursNumber of PersonsTask
(a)FIGURE 1
0.500.501Close Access
1.001.00TOTAL FOR EACH T/R LEFT HALF
(a) Refer to MRAS service bulletin CF6-80C2 S/B 78-1168.
WORK PACKAGE 2
Elapsed HoursTask HoursNumber of PersonsTask
0.500.501Open Access
(a)FIGURE 2
0.500.501Close Access
1.001.00TOTAL FOR EACH T/R RIGHT HALF
(a) Refer to MRAS service bulletin CF6-80C2 S/B 78-1168.
The time to make the change in accordance with MRAS service bulletin CF6-80C2 S/B 78-1168 is not
included.
Work Package 1 and 2 can be done independently, but preparation and restoration time will be less if
the work packages are done at the same time. Work Package 1 and 2 are necessary for each engine.
H. Weight and Balance Changes
Refer to MRAS service bulletin CF6-80C2 S/B 78-1168.
I. Electrical Load Data
Not changed.
J. References
1. Existing Data
a. Engineering Change Memo PRR B12901-100S.
b. Boeing Fleet Team Digest (FTD) 767 FTD 78-07001.
c. Boeing Service Bulletin 767-78A0097.
d. Boeing Service Related Problem (SRP) 767-SRP-78-0061.
e. Federal Aviation Administration (FAA) Airworthiness Directive 2000-09-04.
f. Middle River Aircraft Systems (MRAS) service bulletin CF6-80C2 S/B 78-1168.
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NOTE: The supplier was told to send copies of the service bulletin to each operator.
g. 767-200/300 Aircraft Maintenance Manual (AMM) 78-31-00, 78-31-18, 78-34-07.
h. 767-400 Aircraft Maintenance Manual (AMM) 78-31-00, 78-31-18, 78-34-07.
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-SectionPublication
78-34767 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.
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2.    MATERIAL INFORMATION
A. Material - Price and Availability
Refer to Middle River Aircraft Systems (MRAS) service bulletin CF6-80C2 S/B 78-1168.
B. Industry Support Information
Boeing warranty remedies are not available for the configuration changes given in this service bulletin.
C. Parts Necessary For Each Airplane
1. Kits/Parts
Refer to MRAS service bulletin CF6-80C2 S/B 78-1168.
2. Parts and Materials Supplied by the Operator
Refer to MRAS service bulletin CF6-80C2 S/B 78-1168.
3. Parts Modified and Reidentified
None.
4. Parts Removed and Not Replaced
None.
D. Parts Necessary to Change Spares
Refer to MRAS service bulletin CF6-80C2 S/B 78-1168.
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.
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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. The work instructions are divided into work packages. Task Hours and Elapsed Hours
for each package are given in Paragraph 1.G., Manpower. You can do each work
package independently. Work Package 1 and 2 are necessary for each engine.
5. 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.
6. The instructions in Paragraph 3.B., Work Instructions and the figures can include
operation of tools or test equipment. Boeing Engineering Tool Drawings, the Illustrated
Tool and Equipment Manual, and the Special Tool and Ground Handling Drawing
Index contain data on versions of the tools or test equipment that you can use. It is
permitted to use replaced tools. It is not permitted to use superseded tools.
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.
B. WORK INSTRUCTIONS
WORK PACKAGE 1 - THRUST REVERSER LEFT HALF
1. Deactivate the thrust reverser (T/R) for ground maintenance. Refer to 767-200/300 AMM 78-31-00
or 767-400 AMM 78-31-00 as an accepted procedure.
2. Replace the short flexshaft in accordance with FIGURE 1.
3. Activate the T/R after ground maintenance. Refer to 767-200/300 AMM 78-31-00 or 767-400 AMM
78-31-00 as an accepted procedure.
4. Put the airplane back to a serviceable condition.
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WORK PACKAGE 2 - THRUST REVERSER RIGHT HALF
1. Deactivate the thrust reverser (T/R) for ground maintenance. Refer to 767-200/300 AMM 78-31-00
or 767-400 AMM 78-31-00 as an accepted procedure.
2. Replace the short flexshaft in accordance with FIGURE 2.
3. Activate the T/R after ground maintenance. Refer to 767-200/300 AMM 78-31-00 or 767-400 AMM
78-31-00 as an accepted procedure.
4. Put the airplane back to a serviceable condition.
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 26, 2010
767-78A0100
20 of 26
BOEING SERVICE BULLETIN 767-78A0100
ALERTALERT

### Page 21 (OCR)

BOEING SERVICE BULLETIN 767-78A0100
ALERT  ALERT
THRUST
REVERSER
(T/R) HALF
FWD
LEFT SIDE OF ENGINE SHOWN  1994541
FIGURE 1: THRUST REVERSER LEFT HALF ELECTRO-MECHANICAL BRAKE - SHORT FLEXSHAFT
REPLACEMENT
(SHEET 1 OF 3)
Original Issue: October 26, 2010
767-78A0100
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.  21 of 26

### Page 22 (OCR)

BOEING SERVICE BULLETIN 767-78A0100
ALERT  ALERT
MANUAL
RELEASE
HANDLE
(TYPICAL)
ELECTRO-MECHANICAL
BRAKE
UPPER ANGLE
GEARBOX
FWD
1994548
FIGURE 1: THRUST REVERSER LEFT HALF ELECTRO-MECHANICAL BRAKE - SHORT FLEXSHAFT
REPLACEMENT
(SHEET 2 OF 3)
Original Issue: October 26, 2010
767-78A0100
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.  22 of 26

### Page 23

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 thrust reverser left half.
MORE DATAQTYIDENTIFICATIONNAMETASKSTEP
(a)13278500-( )CABLE-FLEXIBLE
DRIVE
Remove1
(a)1491B1200036-001CABLE-FLEXIBLE
DRIVE
Install (New)2
(a) in accordance with Middle River Aircraft Systems (MRAS) service bulletin CF6-80C2 S/B 78-1168. Also
refer to 767-200/300 AMM 78-31-18 and 767-200/300 AMM 78-34-07 or 767-400 AMM 78-31-18 and
767-400 AMM 78-34-07 for additional information.
FIGURE 1: THRUST REVERSER LEFT HALF ELECTRO-MECHANICAL BRAKE - SHORT FLEXSHAFT
REPLACEMENT
(SHEET 3 OF 3)
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 26, 2010
767-78A0100
23 of 26
BOEING SERVICE BULLETIN 767-78A0100
ALERTALERT

### Page 24 (OCR)

BOEING SERVICE BULLETIN 767-78A0100
ALERT  ALERT
THRUST
REVERSER
(T/R) HALF
FWD
RIGHT SIDE OF ENGINE SHOWN  1994556
FIGURE 2: THRUST REVERSER RIGHT HALF ELECTRO-MECHANICAL BRAKE - SHORT FLEXSHAFT
REPLACEMENT
(SHEET 1 OF 3)
Original Issue: October 26, 2010
BOEING PROPRIETARY -  767-78A0100
Copyright © Unpublished Work - See page 1 for details.  24 of 26

### Page 25 (OCR)

BOEING SERVICE BULLETIN 767-78A0100
ALERT  ALERT
MANUAL
RELEASE
HANDLE
(TYPICAL)
ELECTRO-MECHANICAL
BRAKE
UPPER ANGLE
GEARBOX
FWD
1994558
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 thrust reverser right half.
FIGURE 2: THRUST REVERSER RIGHT HALF ELECTRO-MECHANICAL BRAKE - SHORT FLEXSHAFT
REPLACEMENT
(SHEET 2 OF 3)
Original Issue: October 26, 2010
767-78A0100
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.  25 of 26

### Page 26

MORE DATAQTYIDENTIFICATIONNAMETASKSTEP
(a)13278500-( )CABLE-FLEXIBLE
DRIVE
Remove1
(a)1491B1200036-002CABLE-FLEXIBLE
DRIVE
Install (New)2
(a) in accordance with Middle River Aircraft Systems (MRAS) service bulletin CF6-80C2 S/B 78-1168. Also
refer to 767-200/300 AMM 78-31-18 and 767-200/300 AMM 78-34-07 or 767-400 AMM 78-31-18 and
767-400 AMM 78-34-07 for additional information.
FIGURE 2: THRUST REVERSER RIGHT HALF ELECTRO-MECHANICAL BRAKE - SHORT FLEXSHAFT
REPLACEMENT
(SHEET 3 OF 3)
BOEING PROPRIETARY -
Copyright © Unpublished Work - See page 1 for details.
Original Issue: October 26, 2010
767-78A0100
26 of 26
BOEING SERVICE BULLETIN 767-78A0100
ALERTALERT

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