# Boeing Alert Service Bulletin 747-28A2033: Revision 1

- Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2019-0859, the docket of AD 2020-07-14. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Boeing Alert Service Bulletin 747-28A2033](https://openairdocs.org/service-documents/boeing/747-28a2033.md)
- Title as filed: SB-747-28A2033-01-- (mandated by 2005-01-07)
- Pages: 48
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- Page: https://openairdocs.org/service-documents/boeing/747-28a2033/file/9619e621db9e

## Text

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### Page 1

December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 1o f4 8
ALERT ALERT
Commercial
Airplane
Group 747
ALERTALERT
Service Bulletin
Number: 747-28A2033
Date: December 15, 1971
Revision 1: December 18, 2003
ATA System: 2820
SFB
SUBJECT: FUEL - Pump-Motor Housing External Bonding Jumper Installation
BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET
Copyright © 1989 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Unpublished Work - All Rights Reserved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, BBJ, DC-8, DC-9,
DC-10, MD-10, MD-11, MD-80, MD-88, MD-90, and the red-white-and-blue 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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ALERT ALERT
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December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 3o f4 8
ALERT ALERT
Commercial
Airplane
Group 747
ALERTALERT
Service Bulletin
Number: 747-28A2033 Revision Transmittal Sheet
Date: December 15, 1971
Revision 1: December 18, 2003
ATA System: 2820
SFB
SUBJECT: FUEL - Pump-Motor Housing External Bonding Jumper Installation
This revision includes all pages of the service bullletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION
No more work is necessary on airplanes changed as shown in the initial release of this service bulletin.
REASON FOR REVISION
This revision is a result of SFAR 88, and is issued to change the service bulletin type from Standard to Alert and
provide a recommended compliance time. The technical content and intent of the service bulletin has not
changed, but basic format changes developed since the original issue of the bulletin have been incorporated in
this revision.
Paragraph 1.A., Effectivity, shows changes of airplane operators. Each operator should examine the Effectivity
paragraph for changes.
Vertical 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
Original Issue: December 15, 1971
Revision 1: December 18, 2003

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Revision 1: December 18, 2003 747-28A2033
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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
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### Page 5

December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 5o f4 8
ALERT ALERT
Commercial
Airplane
Group 747
ALERTALERT
Service Bulletin
Number: 747-28A2033 Summary
Date: December 15, 1971
Revision 1: December 18, 2003
ATA System: 2820
SFB
SUBJECT: FUEL - Pump-Motor Housing External Bonding Jumper Installation
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
There are eight boost pumps, four jettison pumps and two override/jettison pumps installed in the fuel system.
Pump motors are installed into the pump housing from outside the tanks. All pump housings are directly bolted
to aircraft structure and provide tank closure; however, the tank interior, including pump mounting flanges, have
a special corrosion protection finish. This finish provides limited electrical bonding and supplementary bonds
are required to reduce pump housing to structure voltage during electrical fault conditions. Two supplementary
bonding paths are presently provided: one inside the tank from the pump housing to structure and the other
from the pump motor case to a ground through the connector.
Based on re-evaluation of this combined current path bonding arrangement, it has been determined that the
electrical bonding resistance of these fuel pumps should be reduced. To further ensure mechanical and
electrical bonding integrity, it is desirable to install bonding external to the tanks between the pump motor
housing and aircraft structure.
This service bulletin revision is the result of SFAR 88. Boeing has conducted a one time engineering evaluation
on the airplane fuel tank system design. Based on engineering analysis of the fuel tank system design, Boeing
has reached a safety determination for the condition described in this service bulletin. The service bulletin type
is changed from Standard to Alert as a result of this safety determination.
ACTION (PRR 75357)
Part 1: Install a bonding jumper from each pump housing to airplane structure outside of the fuel tanks.
Part 2 (Optional): Remove the bonding jumper from each pump housing to structure that is installed inside the
fuel tanks.

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
EFFECTIVITY
All 747 airplanes line numbers 1 - 167.
COMPLIANCE
Boeing recommends that operators incorporate Part 1 of this service bulletin within 5 years after the issue date
of this revision.
INDUSTRY SUPPORT INFORMATION
Boeing warranty remedies are not available for the configuration changes given in this service bulletin.
MANPOWER
MATERIAL INFORMATION
Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Airplanes Total Task Hours Elapsed Hours
All (Part 1) 8.0 8.0
All (Part 2) 8.0 8.0

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
LEFT SIDE SHOWN,
RIGHT SIDE OPPOSITE
MAIN TANK BOOST
BOOST PUMPS
JUMPER ON MAIN TANK
BONDING JUMPER FROM
PART 2: (OPTIONAL) REMOVE 
PART 1: INSTALL BONDING
PUMPS
MAIN TANK BOOST
BOOST PUMPS
JUMPER ON MAIN TANK
BONDING JUMPER FROM
PART 2: (OPTIONAL) REMOVE 
PART 1: INSTALL BONDING
PUMPS
JETTISON OVERRIDE
BONDING JUMPER FROM
PART 2: (OPTIONAL) REMOVE 
OVERRIDE PUMPS
JUMPER ON JETTISON
PART 1: INSTALL BONDING
PUMPS
FWD
W56089

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ALERT ALERT
BLANK PAGE

### Page 9

December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9o f4 8
ALERT ALERT
Commercial
Airplane
Group 747
ALERTALERT
Service Bulletin
Number: 747-28A2033
Date: December 15, 1971
Revision 1: December 18, 2003
ATA System: 2820
SFB
SUBJECT: FUEL - Pump-Motor Housing External Bonding Jumper Installation
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
This service bulletin is for the airplanes shown below. An equivalent change is on subsequent
production airplanes. Refer to PRR 75357 for data about this change.
Refer to Service Bulletin Index Document D6-30300 Part 3 for Airplane Variable Number, Line
Number, and Serial Number data.
Airplane models:
747-100 747-200B
IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER
AERO CONTROLS (AEO)
1 RA722
AIR ATLANTA ICELANDIC (AID)
1 RA534
ALBARAKA (AAB)
1 RB102
ARKIA ISRAELI AIRLINES (ARK)
1 RA253

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
CORSAIR (COR)
1R A 0 2 3
EVERGREEN INTERNATIONAL A/L (EVR)
1 RA004 RA028 RA631 RA633
EXPORT RESTRICTED AIRPLANES (YWV)
1 RA101–RA103 RA112 RA161–RA163 RA303
RA535
FINOVA (GRB)
1R A 0 1 5 R A 6 5 1
FLEET CAPITAL LEASING (SBC)
1R A 1 0 6
FLIGHTPLAN INTERNATIONAL (FLP)
1R A 0 0 3
GE (GEC)
1R A 0 1 6
GE CAPITAL CORPORATION (GEF)
1 RA005 RA007 RA013 RA027
RA634
JUMBO JET LEASING (JJL)
1 RA532–RA533
KABO AIR (KAB)
1R A 3 0 5 R A 5 6 0
KALITTA AIR (KAC)
1 RA401–RA402 RA524 RA635 RA913
NASA (NAS)
1R A 9 0 8
NORTHWEST AIRLINES (NWA)
1 RA370–RA373
POLAR AIR CARGO (PAO)
1R A 9 1 0 R A 9 1 4
SOUTH AFRICAN AIRWAYS (SAA)
1 RB071–RB073
TRANSJET AIRWAYS (TSX)
1R B 0 0 1
UNITED AIRLINES (UAL)
1 RA903 RA906–RA907

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
UPS (UPS)
1 RA026 RA029 RA033 RA901–RA902
RA911–RA912 RA915–RA916
IDENTIFICATION BY VARIABLE NUMBER
2. Spares Affected
None.
Variable Group
RA001–RA034 1
RA101–RA115 1
RA161–RA164 1
RA201–RA203 1
RA216 1
RA245 1
RA251–RA255 1
RA301–RA307 1
RA351–RA360 1
RA369–RA373 1
RA401–RA412 1
RA501–RA502 1
RA521–RA524 1
RA532–RA535 1
RA551–RA552 1
RA559–RA560 1
RA581–RA582 1
RA601–RA602 1
RA631–RA635 1
RA651–RA652 1
RA671–RA676 1
RA701–RA702 1
RA721–RA722 1
RA741–RA743 1
RA761–RA762 1
RA781–RA782 1
RA901–RA916 1
RB001–RB003 1
RB041–RB044 1
RB071–RB073 1
RB101–RB102 1

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
B. Concurrent Requirements
None.
C. Reason
There are eight boost pumps, four jettison pumps and two override/jettison pumps installed in the fuel
system. Pump motors are installed into the pump housing from outside the tanks. All pump housings
are directly bolted to aircraft structure and provide tank closure; however, the tank interior, including
pump mounting flanges, have a special corrosion protection finish. This finish provides limited
electrical bonding and supplementary bonds are required to reduce pump housing to structure voltage
during electrical fault conditions. Two supplementary bonding paths are presently provided: one
inside the tank from the pump housing to structure and the other from the pump motor case to a
ground through the connector.
Based on re-evaluation of this combined current path bonding arrangement, it has been determined
that the electrical bonding resistance of these fuel pumps should be reduced. To further ensure
mechanical and electrical bonding integrity, it is desirable to install bonding external to the tanks
between the pump motor housing and aircraft structure.
This service bulletin revision is the result of SFAR 88. Boeing has conducted a one time engineering
evaluation on the airplane fuel tank system design. Based on engineering analysis of the fuel tank
system design, Boeing has reached a safety determination for the condition described in this service
bulletin. The service bulletin type is changed from Standard to Alert as a result of this safety
determination.
The technical content and intent of the service bulletin has not changed, but basic format changes
developed since the original issue of the bulletin have been incorporated in this revision.
D. Description
Part 1: A larger, easily inspected bonding jumper is installed from each pump housing to airplane
structure outside of the fuel tanks.
Part 2 (Optional): A bonding jumper is removed from each pump housing to structure inside the fuel
tanks.
Note: After incorporation of Part 1 of this service bulletin, the bonding jumper inside the fuel tank is
no longer necessary and at the operator’s option may be removed at any time in accordance
with Part 2 of this service bulletin.
Revision 1 - No more work is necessary on airplanes changed as shown in the initial release of this
service bulletin.
E. Compliance
Boeing recommends that operators incorporate Part 1 of this service bulletin within 5 years after the
issue date of this revision.

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
F. Approval
This service bulletin was examined by the Federal Aviation Administration (FAA). The changes
specified in this service bulletin comply with the applicable Federal Aviation Regulations (FAR) and
are FAA approved. This service bulletin and the FAA approval were based on the airplane in its
original Boeing delivery configuration or as modified by other FAA 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 modification 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
— T i m et os c h e d u l et h ew o r k
— T i m et oe x a m i n et h ew o r k
— T i m et oc u r et h em a t e r i a l s
— T i m et om a k et h ep a r t s
— Time to find the tools.
H. Weight and Balance Changes
I. Electrical Load Data
Not applicable.
J. References
1. Existing Data:
a. Engineering Change Memo PRR 75357
Task
Number of
Persons Task-Hours Elapsed Hours
Install Jumper 1 8.0 8.0
Total per airplane 8.0 8.0
Task
Number of
Persons Task-Hours Elapsed Hours
Remove Jumper 1 8.0 8.0
Total per airplane 8.0 8.0
(a) Fuel tank preparation and entry time is not included
Airplane
Change in Weight
(Pounds)
Change in Moment
(Pound-Inches)
All +2.0 +2,486

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
b. 747 Maintenance Manual (AMM) Subject 20-30-02, 28-11-00, 32-00-30
c. Boeing Standard Wiring Practices Manual (BSWPM) 20-20-00
2. Data supplied with this Service Bulletin:
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin:
None.
K. Publications Affected
L. Interchangeability and Intermixability of Parts
Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.
Publication Chapter-Section
747 Maintenance Manual 20-30, 28-11, 28-22, 28-31
747 Illustrated Parts Catalog 28-22, 28-31

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
2. MATERIAL INFORMATION
A. Material - Price and Availability
The kit identified in Paragraph 2.C., Parts Necessary For Each Airplane, may be obtained from Boeing
at no charge within the terms and conditions defined below. After expiration of the quotation, price
and delivery data will be provided upon request.
Listed below are the starting times and rates for delivery and price of Service Bulletin Kits. When no
rate is shown, all kits are available at the indicated starting time. When source capacity is limited and
tooling or material availability is the pacing factor, customer purchase orders will receive an allocation,
from the available quantities, based on receipt date of purchase order by the Spares Department.
Delivery dates are computed from the expiration date of this quotation, if received prior to the
expiration date. Information regarding improved delivery dates at increased prices may be obtained
upon request through normal spares procurement channels.
Date: December 15, 1971
(a) Limited quantities available starting January 12, 1972.
The prices quoted are subject to the terms and conditions of the Boeing standard purchase order
acknowledgment. Quotations are subject to acceptance within 120 days from date hereon. Any parts
which are offered at "No Charge" are subject to charge after expiration of the 120-day period. Prices
are quoted in United States Dollars. Terms: Net 30 days.
Reference this service bulletin and submit your purchase order by one of the methods that follow:
1. Order on-line via ATA Spec 2000 or Boeing Part Page
2. Fax to (206) 662-7145
3. Spares Customer Support - MC 36-65
Boeing Spares Department
P.O. Box 3707
Seattle, Washington 98124-2207 USA
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:
The following kit assemblies may be obtained from Boeing as noted in Paragraph 2.A., Material
- Price and Availability.
Note: Top kit assembly is divided into subkits for convenience of installation. Only one top kit
and customer furnished materials listed in Paragraph 2.C.2 are required to modify each
Kit Number Description Delivery Unit Price
63B11846-1 Kit Assembly (a) No Charge

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
airplane.
2. Parts and Materials Supplied by the Operator:
3. Parts Modified and Reidentified:
None.
Kit 63B11846 - KIT, BONDING JUMPER, FUEL PUMP
New Part
Number
QTY
Name
Existing Part
Number Notes-3 -2 -1
63B11846-1 . . - Top Kit -- --
63B11846-2 . - 1 Sub Kit, Jettison Pump
Bonding Jumper
-- --
63B11846-3 - . 1 Sub Kit, Boost Pump Bonding
Jumper
-- --
69B92489-1 8 . . Bonding Clip -- --
69B92489-2 . 6 . Bonding Clip -- --
BAC27EFS-174 8 6 . Aluminum Foil Marker -- --
BACB30NE4-3 8 6 . Bolt -- (a)
BACB30NE4-11 . 6 . Bolt -- (a)
BACB30NE4H11 6 . . Bolt -- (a)
BACB30NE4H13 2 . . Bolt -- (a)
BACJ40D-20-24 8 6 . Bonding Jumper -- --
BACN10JC4 8 6 . Nut -- (a)
AN960D416L 32 24 . Washer -- (a)
AN960-8 32 24 . Washer -- (a)
MS24674-9 40 30 . Screw -- (a)
MS35338-44 8 6 . Lock Washer -- (a)
(a) If grip length shown is not available at Boeing, fasteners supplied in kits may be one grip length
longer than indicated. Also, if any fasteners part numbers listed are not available or have been
superseded, substitute fasteners may be supplied in kits. Boeing Document D-590 and Boeing
Drawing 012W6100 are used to determine the part numbers used as substitutes
Part Number /
Specification QTY Name Notes
Alodine 1000L As Required Chemical Surface Film (a)
454-4-1 As Required Base (b)
CA109 As Required Catalyst (b)
TS52 As Required Thinner (b)
(a) Amchen Products Inc., Spring Garden Street, Ambler, Pennsylvania, 19002
(b) Finch Paint and Chemical Co., 208502 South Normandy, Torrance, California, 90502

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
4. Parts Removed and Not Replaced:
D. Parts Necessary to Change Spares
None.
E. Special Tooling - Price and Availability
None.
F. Special Tooling Necessary to do this Service Bulletin
No special tools or equipment are necessary to do the change in this service bulletin. But,
maintenance and overhaul tools in the manuals given in Paragraph 1.J., References, can be
necessary. Examine operator tool supply to make sure all necessary tools are available.
Existing
Part Number Name Notes
BACJ40AB21-6 Bonding Jumper (a)
BACJ40AB21-8 Bonding Jumper (a)
BACJ40AB21-14 Bonding Jumper (a)
MS25083-2BC8 Bonding Jumper (a)
MS25083-2BB9 Bonding Jumper (a)
MS25083-2BC12 Bonding Jumper (a)
MS25083-2BB16 Bonding Jumper (a)
(a) Dispose of this part in accordance with operator’s existing procedures.

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ALERT ALERT
BLANK PAGE

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BOEING SERVICE BULLETIN 747-28A2033
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. The following paragraphs outline the general accomplishment instructions and detailed
test requirements. The suggested sequence of operations and detailed accomplishment
instructions are indicated by the steps in the figures. Unless otherwise indicated, figures
are in sequential order.
2. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for
definition of the acronyms.
3. Refer to BSWPM 20-20-00 for the bonding jumper ground installation instructions.
4. Obey all of the warnings and cautions given in the specified manual sections.
5. The work instructions are divided into Parts. Task-Hours and Elapsed-Hours for each Part
are given in Paragraph 1.G., Manpower. Part 1 must be done prior to, or concurrent with,
Part 2. Part 2 is optional.
6. For Part 1 only, the 14 new bonding clips and bonding jumpers can be installed on the fuel
boost and fuel jettison pumps without defueling and entering tanks.
7. For Part 2 only, removal of the existing 14 bonding jumpers installed inside the fuel tanks
can only be accomplished by defueling and entering the fuel tanks. Part 2 is optional.
B. WORK INSTRUCTIONS
PART 1: BONDING CLIP AND BONDING JUMPER INSTALLATION
1. Gain access to main fuel boost pumps (8 locations) as follows:
a. For main tank No. 1 or No. 4 forward boost pumps, remove applicable access door, 545CB
or 645CB.
b. For main tank No. 1 or No. 4 aft boost pumps, remove applicable access door, 545DB or
645DB.
CAUTION: TO PREVENT DAMAGE TO LEADING EDGE PANELS, MAINTENANCE MATS
MUST BE PLACED ON WING LEADING EDGE AREAS ON WHICH
MAINTENANCE PERSONNEL WORK.
c. For main tank No. 2 or No. 3 forward boost pumps, extend inboard leading edge flaps for
access to front spar. (Refer to 747 AMM 27-81-00)

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BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
WARNING: FLAPS CAN RETRACT IN 7 SECONDS. INSTALL LOCKS TO PREVENT
INJURY FROM INADVERTENT OPERATION OF FLAPS.
(1) Install locks on all extended leading edge flap sets.
d. For main tank No. 2 or No. 3 aft boost pumps, enter applicable wing gear wheel well for
access to rear spar.
(1) Check that the landing gear locks are installed.
WARNING: REFERENCE 747 AMM 32-00-30 FOR LOCK INSTALLATION
PROCEDURE. RAPID ACTION OF DOORS MAY INJURE PERSONNEL OR
DAMAGE EQUIPMENT IF LOCKS ARE NOT PROPERLY INSTALLED.
(2) Install wing and body gear door locks.
2. Install bonding clip and bonding jumper on each of the 8 main fuel boost pumps per Figure 1, and
install the "CAUTION" marker near each boost pump per Figure 3.
3. Gain access to the main fuel jettison pumps and override/jettison pumps through the left and right
wing gear wheel wells.
Note: Check that the landing gear ground locks and wing and body gear door locks are installed
per the steps above.
4. Install a bonding clip on the mounting flange of each of the four fuel jettison pump-motor housings
in the left and right wing fuel tanks and the two override/jettison pump-motor housings in the
center wing tank per Figure 2, and install the "CAUTION" marker near each jettison and override/
jettison pump per Figure 3.
5. Restore the airplane to normal.
PART 2: (OPTIONAL) FUEL PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL FROM
FUEL TANKS
1. Disconnect and remove eight existing bonding jumpers between airplane structure and fuel boost
pump-motor housings inside the left and right wing fuel tanks per the following figures.
 No. 1 and No. 4 FWD and AFT main boost pumps per Figure 4, Figure 5, and Figure 8.
 No. 2 and No. 3 AFT boost pumps per Figure 4, Figure 6, and Figure 8.
 No. 2 and No. 3 FWD boost pumps per Figure 4, Figure 7, and Figure 8.
2. Disconnect and remove the four existing bonding jumpers between airplane structure and fuel
jettison pump-motor housings inside the left and right wing fuel tanks per Figure 9 and Figure 10.
3. Disconnect and remove the two existing bonding jumpers between airplane structure and fuel
override/jettison pump-motor housings inside the center wing fuel tank per Figure 9 and Figure
11.

### Page 21

FIGURE 1: FUEL BOOST PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 21 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 1: FUEL BOOST PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
LEFT WING SHOWN
(RIGHT WING OPPOSITE)
(REF)
FRONT SPAR
(NO. 3 OPP.)
NO. 2 MAIN FUEL TANK
SEE DETAIL III
SEE DETAIL II
(NO. 4 OPP.)
BOOST PUMP
NO.1 MAIN AFT
BOOST PUMP (NO. 4 0PP.)
NO.1 MAIN FORWARD
(REF)
REAR SPAR
BOOST PUMP (NO. 3 OPP.)
NO. 2 MAIN AFT
BOOST PUMP (NO.3 OPP.)
NO. 2 MAIN FORWARD
SEE DETAIL I
W56782
(SHEET 1 OF 6)

### Page 22

FIGURE 1: FUEL BOOST PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 22 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
DETAIL I
BONDING JUMPER
BONDING CLIP
BOOST PUMP (NO.3 OPP.)
NO.2 MAIN FORWARD
SKIN (REF)
LOWER WING
HOUSING (REF)
PUMP-MOTOR
(REF)
SPAR
FRONT
SEE VIEW A-A
FWD
UP
NEW CONFIGURATION SHOWN
W56283
(SHEET 2 OF 6)

### Page 23

FIGURE 1: FUEL BOOST PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 23 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
DETAIL II
(NO.3 OPP.)
BOOST PUMP
NO.2 MAIN AFT 
SKIN(REF)
LOWER WING
PUMP-MOTOR
HOUSING(REF)
SEE VIEW A-A
REAR SPAR
FWD
UP
W56209
(SHEET 3 OF 6)

### Page 24

FIGURE 1: FUEL BOOST PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 24 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
DETAIL III
HOUSING (REF)
PUMP-MOTOR
INBD
UP
SEE VIEW A-A
NO.1 MAIN FORWARD
BOOST PUMP (NO.4 OPP.)
SKIN (REF)
LOWER WING
HOUSING (REF)
PUMP-MOTOR
NO.1 MAIN AFT
BOOST PUMP (NO.4 OPP.)
SEE VIEW A-A
W56499
(SHEET 4 OF 6)

### Page 25

FIGURE 1: FUEL BOOST PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 25 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
VIEW B-B
(REF)
STRUCTURE
(REF)
PUMP
BONDING CLIP
(REF)
STRUCTURE
VIEW A-A
BONDING JUMPER
(REF)
FLANGE
PUMP
MOUNTING
DRAIN PLUG
(REF)
SEE VIEW B-B
BOLT
(REF)
ELECTRICAL CONNECTOR
(REF)
610
72
11
51
3
4
98
W56631
(SHEET 5 OF 6)

### Page 26

FIGURE 1: FUEL BOOST PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 26 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
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 pump location.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Screw MS24674-8 3 --
2 Remove Bolt BACB30NE4H8 -- --
3 Clean Faying Surface -- -- Clean faying surface of
bonding clip 69B92489-1 and
faying surface of pump-motor
flange per operator’s standard
procedure to ensure good
electrical contact.
4 Install Bonding Clip 69B92489-1 1 --
5 Install Screw MS24674-9 3 --
6 Install Bonding Jumper BACJ40D20-24 1 Connect bonding jumper to
bonding clip 69B92489-1.Bolt BACB30NE4-3 1
Washer AN960D416L 3
Nut BACN10JC4 1
7 Install Bolt BACB30NE4H11
or
BACB30NE4H13
1 Connect bonding jumper
BACJ40D20-24 to airplane
structure. Use Bolt
BACB30NE4H13 for No. 2 and
No. 3 main aft boost pumps.
Washer AN960D416L 1
Lock Washer MS35338-44 1
8 Remove Screw MS24674-8 2 --
9 Install Screw MS24674-9 2 --
Washer AN960-8 4
10 Measure Resistance -- -- Measure total resistance
between boost pump mounting
flange and airplane structure.
Measured resistance shall not
exceed 0.0004 ohm. Refer to
747 AMM 28-22-03. Ensure
that the electrical connection
has been made to the motor
and that the bonding jumper is
securely connected to the fuel
pump-motor housing and
airplane structure before taking
resistance reading.
11 Install Safety Wire -- -- Install as shown.
(SHEET 6 OF 6)

### Page 27

FIGURE 2: FUEL JETTISON PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 27 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 2: FUEL JETTISON PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
FWD
UPMAIN TANK NO.2
(NO.3 OPP.)
(REF)
TANK (REF)
CENTER WING
OVERRIDE/JETTISON PUMP
REAR SPAR
(REF)
JETTISON PUMP OPP.)
(RIGHT WING MAIN
JETTISON PUMP
LEFT WING MAIN
SEE DETAIL I
W56720
(SHEET 1 OF 4)

### Page 28

FIGURE 2: FUEL JETTISON PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 28 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
DETAIL I
PUMP-MOTOR HOUSING
(REF)
SEE VIEW A-A
REAR SPAR
(REF)
FWD
UP
W56757
(SHEET 2 OF 4)

### Page 29

FIGURE 2: FUEL JETTISON PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 29 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
UP
UP
SEE VIEW B-B
BONDING JUMPER
REAR SPAR (REF)
VIEW A-A
(REF)
REAR SPAR
BONDING CLIP
MOUNTING FLANGE
PUMP-MOTOR HOUSING
(REF)
VIEW B-B
15
11
8 9
4
3
10
6
2 7
W56844
(SHEET 3 OF 4)

### Page 30

FIGURE 2: FUEL JETTISON PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 30 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
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 pump location.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Screw MS24674-8 3 --
2 Remove Bolt BACB30NM4C8 1 --
Washer BACW10P33AL 1
3 Clean Faying Surface -- -- Clean faying surface of
bonding clip 69B92489-2 and
pump motor flange per
operator’s standard procedure
to ensure good electrical
contact.
4 Install Bonding Clip 69B92489-2 1 --
5 Install Screw MS24674-9 3 --
6 Install Bonding Jumper BACJ40D20-24 1 Connect bonding jumper to the
bonding clip 69B92489-2.Bolt BACB30NE4-3 1
Washer AN960D416L 3
Nut BACN10JC4 1
7 Install Bolt BACB30NE4-11 1 Connect bonding jumper
BACJ40D20-24 to structure.Lock Washer MS35338-44 1
Washer AN960D416L 1
8 Remove Screw MS24674-8 2 --
9 Install Screw MS24674-9 2 --
Washer AN960-8 4
10 Measure Resistance -- -- Measure total resistance
between jettison pump
mounting flange and airplane
structure. Measured
resistance shall not exceed
0.0002 ohm. Refer to 747
AMM 28-31-01. Ensure that
the electrical connection has
been made to the motor and
that the bonding jumper is
securely connected to the fuel
pump-motor housing and
airplane structure before taking
resistance reading.
11 Install Safety Wire -- -- Install as shown.
(SHEET 4 OF 4)

### Page 31

FIGURE 3: ALUMINUM FOIL MARKER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 31 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 3: ALUMINUM FOIL MARKER INSTALLATION
1
W56866BAC27EFS-174 
CAUTION
PUMP MOTOR
TERMINAL TO
CONNECT BONDING
(SHEET 1 OF 2)

### Page 32

FIGURE 3: ALUMINUM FOIL MARKER INSTALLATION
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 32 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
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 airplane.
STEP TASK NAME PART NUMBER QTY NOTES
1 Install Marker BAC27EFS-174 1 On the aft side of rear spar web adjacent to
the right side override/jettison pump at
approximately RBBL 92.18.
1 On the aft side of rear spar web adjacent to
the left side override/jettison pump at
approximately LBBL 91.80.
1 On the aft side of rear spar web adjacent to
jettison pump located in right wing at
approximately WS 425.80.
1 On the aft side of rear spar web inboard to
jettison pump located in the left wing at
approximatley WS 425.80.
1 On the aft side of rear spar web inboard of
jettison pump located in right wing at
approxximately WS 389.75.
1 On the aft side of rear spar web inboard of
jettison pump located in the left wing at
approximately WS 389.75.
1 On the inside surface of No. 4 main forward
boost pump located in right wing at
approximately WS 684 and 49.0 inches
forward of the rear spar.
1 On the inside surface of No. 1 main forward
boost pump located in left wing at
approximately WS 684 and 49.0 inches
forward of the rear spar.
1 On inside surface of No. 4 main aft boost
pump located in right wing at approximately
WS 711 and 48.0 inches forward of rear spar.
1 On inside surface of No. 1 main aft boost
p u m pl o c a t e di nl e f tw i n ga ta p p r o x i m a t e l y
WS 711 and 48.0 inches forward of rear spar.
1 On forward side of front spar web adjacent to
No. 3 main forward boost pump located in
right wing at approximately FSSI 282.50.
1 On forward side of front spar web adjacent to
No. 2 main forward boost pump located in left
wing at approximately FSSI 282.50.
1 On the aft side of rear spar web adjacent to
No. 3 main aft boost pump located in right
wing at approximately WS 398.62.
1 On the aft side of rear spar web adjacent to
No. 2 main aft boost pump located in left wing
at approximately WS 398.62.
(SHEET 2 OF 2)

### Page 33

FIGURE 4: FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 33 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 4: FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Bonding Jumper -- -- Remove bonding jumper from
the No. 1 main forward and aft
boost pumps, and No.4 main
forward and aft boost pumps.
2 Remove Bonding Jumper -- -- Remove bonding jumper from
t h eN o .2m a i na f tb o o s tp u m p ,
and No.3 main aft boost pump.
3 Remove Bonding Jumper -- -- Remove bonding jumper from
the No. 2 main forward boost
pump, and No.3 main forward
boost pump.
BOOST PUMP (NO.3 OPP.)
NO. 2 MAIN FORWARD
LEFT WING SHOWN
(RIGHT WING OPPOSITE)
(REF)
FRONT SPAR
(NO. 4 OPP.)
BOOST PUMP
NO.1 MAIN AFT
BOOST PUMP (NO. 4 0PP.)
NO.1 MAIN FORWARD
(REF)
REAR SPAR
BOOST PUMP (NO. 3 OPP.)
NO. 2 MAIN AFT
SEE DETAIL I
1
2
3
W56874
(SHEET 1 OF 1)

### Page 34

FIGURE 5: NO.1 AND NO.4 FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 34 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 5: NO.1 AND NO.4 FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
HOUSING (REF)
PUMP-MOTOR
SKIN (REF)
LOWER WING
HOUSING (REF)
PUMP-MOTOR
2 1
W56900
(SHEET 1 OF 2)

### Page 35

FIGURE 5: NO.1 AND NO.4 FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 35 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Bonding Jumper BACJ40AB21-8 2 Remove bonding jumper from
N o .1a n dN o . 4f o r w a r dm a i n
boost pump.
2 Remove Bonding Jumper BACJ40AB21-8 2 Remove bonding jumper from
No. 1 and No.4 aft main boost
pump.
(SHEET 2 OF 2)

### Page 36

FIGURE 6: NO.2 AND NO.3 AFT FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER
REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 36 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 6: NO.2 AND NO.3 AFT FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
SEE VIEW A-A
PUMP-MOTOR
HOUSING(REF)
REAR SPAR
FWD
UP
W56905
(SHEET 1 OF 2)

### Page 37

FIGURE 6: NO.2 AND NO.3 AFT FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER
REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 37 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Bonding Jumper BACJ40AB21-14 2 Remove bonding jumper from
N o .2a n dN o . 3m a i nb o o s t
pump.
VIEW A-A
STRUCTURE
BASIC
1
W56978
(SHEET 2 OF 2)

### Page 38

FIGURE 7: NO.2 AND NO.3 FORWARD FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER
REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 38 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 7: NO.2 AND NO.3 FORWARD FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER
REMOVAL
HOUSING (REF)
PUMP-MOTOR
FRONT SPAR
(REF)
SEE VIEW A-A
FWD
UP
W56986
(SHEET 1 OF 2)

### Page 39

FIGURE 7: NO.2 AND NO.3 FORWARD FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER
REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 39 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Bonding Jumper BACJ40AB21-6 2 Remove bonding jumper from
N o .2a n dN o . 3m a i nb o o s t
pump.
VIEW A-A
HOUSING (REF)
PUMP-MOTOR
(REF)
STRUCTURE
BASIC
1
W57017
(SHEET 2 OF 2)

### Page 40

FIGURE 8: TYPICAL BONDING JUMPER REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 40 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 8: TYPICAL BONDING JUMPER REMOVAL
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 bonding jumper installation location.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Nut BACN10JC4 1 Remove the fasteners and the
terminal of the bonding jumper.
Keep the fasteners.Washer AN960D416L 1
Bolt BACB30NM4C5 1
2 Install Nut BACN10JC4 1 Install the kept fasteners.
Washer AN960D416L 1
Bolt BACB30NM4C5 1
3 Remove Nut BACN10JC3 1 Remove the fasteners and the
bonding jumper.Washer AN960D10L 1
Bolt BACS12CB3-9 1
4 Apply Corrosion
Resistant Finish
-- -- Apply brush-on chemical film
(Alodine or Iridite) and
corrosion resistant finish for
integral fuel tanks on newly
exposed surface per 747 AMM
20-30-02 and 28-11-00.
(REF)
BASIC STRUCTURE
BONDING JUMPER
HOUSING (REF)
PUMP-MOTOR
FUEL BOOST
3
1 2
4
4
W57049
(SHEET 1 OF 1)

### Page 41

FIGURE 9: FUEL JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 41 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 9: FUEL JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Bonding Jumper -- -- Remove bonding jumper from
main jettison pump-motor
housings in left wing and right
wing.
2 Remove Bonding Jumper -- -- Remove bonding jumper from
override/jettison pump-motor
housings.
MANIFOLD (REF)
FUEL JETTISON
REAR SPAR
(REF)
MAIN TANK NO.2
(NO.3 OPP.)
(REF)
JETTISON PUMP OPP.)
(RIGHT WING MAIN
JETTISON PUMP
LEFT WING MAIN
OVERRIDE/JETTISON PUMP
TANK (REF)
CENTER WING
FWD
UP
2
1
W57059
(SHEET 1 OF 1)

### Page 42

FIGURE 10: MAIN JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 42 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 10: MAIN JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Nut BACN10JC3 1 --
Washer AN960D10L 1
Screw BACS12CB3-10 1
2 Remove Nut BACN10JC3 1 Remove the fasteners and the
bonding jumper from pump
housing grounding lug.
Washer AN960D10L 3
Screw BACS12CB3-8 1
Bonding Jumper MS25083-2BB( ) 1
3 Apply Corrosion
Resistant Finish
-- -- Apply brush-on chemical film
(Alodine or Iridite) and
corrosion resistant finish for
integral fuel tanks on newly
exposed surface per 747 AMM
20-30-02 and 28-11-00.
FWD
PUMP (REF)
MAIN JETTISON (REF)
SPAR
REAR
(REF)
STRUCTURE
PUMP (REF)
MAIN JETTISON
BONDING
JUMPER BONDING
JUMPER
389.75
WS
425.80
WS
(LEFT WING JETTISON PUMPS SHOWN,
RIGHT WING JETTISON PUMPS OPPOSITE)
PLAN VIEW
1 3
31
23
23
W57097
(SHEET 1 OF 1)

### Page 43

FIGURE 11: OVERRIDE/JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 43 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
FIGURE 11: OVERRIDE/JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
The step numbers shown below agree with the numbers shown in the circle symbols in the figure.
STEP TASK NAME PART NUMBER QTY NOTES
1 Remove Nut BACN10JC3 1 --
Washer AN960D10L 1
Screw BACS12CB3-10 1
2 Remove Nut BACN10JC4 1 Remove the fasteners and the
bonding jumper from pump
housing grounding lug.
Washer AN960D416L 3
Screw BACS12CB4-10 1
Bonding Jumper MS25083-2BC( ) 1
3 Apply Corrosion
Resistant Finish
-- -- Apply brush-on chemical film
(Alodine or Iridite) and
corrosion resistant finish for
integral fuel tanks on newly
exposed surface per 747 AMM
20-30-02 and 28-11-00.
FWD
(REF)
STRUCTURE (REF)
STRUCTURE
LBL
98.59
(REF)
REAR SPAR
PLAN VIEW
OVERRIDE JETTISON
PUMP (REF)
BONDING
JUMPER
OVERRIDE JETTISON
PUMP (REF)
BONDING JUMPER
0
BL
RBL
98.59
1 3
23
23
1 3
W57169
(SHEET 1 OF 1)

### Page 44

BLANK PAGE
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 44 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
BLANK PAGE

### Page 45

Table of Contents
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 45 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
Table of Contents
R e v i s i o n T r a n s m i t t a l S h e e t .........................................3
S u m m a r y .............................................5
1 . P L A N N I N G I N F O R M A T I O N ......................................9
A . E f f e c t i v i t y .............................................9
1 . A i r p l a n e s ..........................................9
2 . S p a r e s A f f e c t e d ...................................... 1 1
B . C o n c u r r e n t R e q u i r e m e n t s................................... 1 2
C . R e a s o n ............................................ 1 2
D . D e s c r i p t i o n ........................................... 1 2
E . C o m p l i a n c e ........................................... 1 2
F . A p p r o v a l............................................ 1 3
G . M a n p o w e r ........................................... 1 3
H . W e i g h t a n d B a l a n c e C h a n g e s................................. 1 3
I . E l e c t r i c a l L o a d D a t a...................................... 1 3
J . R e f e r e n c e s ........................................... 1 3
1 . E x i s t i n g D a t a : ....................................... 1 3
2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . 14
3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . 14
K . P u b l i c a t i o n s A f f e c t e d ...................................... 1 4
L . I n t e r c h a n g e a b i l i t y a n d I n t e r m i x a b i l i t y o f P a r t s......................... 1 4
2 . M A T E R I A L I N F O R M A T I O N ..................................... 1 5
A . M a t e r i a l - P r i c e a n d A v a i l a b i l i t y ................................. 1 5
B . I n d u s t r y S u p p o r t I n f o r m a t i o n .................................. 1 5
C . P a r t s N e c e s s a r y F o r E a c h A i r p l a n e.............................. 1 5
1 . K i t s / P a r t s : ......................................... 1 5
2 . P a r t s a n d M a t e r i a l s S u p p l i e d b y t h e O p e r a t o r :...................... 1 6
3 . P a r t s M o d i f i e d a n d R e i d e n t i f i e d : ............................. 1 6
4 . P a r t s R e m o v e d a n d N o t R e p l a c e d : ............................ 1 7
D . P a r t s N e c e s s a r y t o C h a n g e S p a r e s.............................. 1 7
E . S p e c i a l T o o l i n g - P r i c e a n d A v a i l a b i l i t y ............................. 1 7
F . S p e c i a l T o o l i n g N e c e s s a r y t o d o t h i s S e r v i c e B u l l e t i n ..................... 1 7
3 . A C C O M P L I S H M E N T I N S T R U C T I O N S ............................... 1 9
A . G E N E R A L I N F O R M A T I O N .................................. 1 9
B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
FIGURE 1: FUEL BOOST PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER INSTALLATION
21
FIGURE 2: FUEL JETTISON PUMP-MOTOR HOUSING EXTERNAL BONDING JUMPER
I N S T A L L A T I O N ...................................... 2 7
F I G U R E 3 : A L U M I N U M F O I L M A R K E R I N S T A L L A T I O N ....................... 3 1
FIGURE 4: FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL . . . . . . . 33
FIGURE 5: NO.1 AND NO.4 FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL
34
FIGURE 6: NO.2 AND NO.3 AFT FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER
R E M O V A L ........................................ 3 6
FIGURE 7: NO.2 AND NO.3 FORWARD FUEL BOOST PUMP-MOTOR HOUSING BONDING JUMPER

### Page 46

Table of Contents
December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 46 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT
R E M O V A L .........................................3 8
F I G U R E 8 : T Y P I C A L B O N D I N G J U M P E R R E M O V A L........................4 0
FIGURE 9: FUEL JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL. . . . . . 41
FIGURE 10: MAIN JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL. . . . . . 42
FIGURE 11: OVERRIDE/JETTISON PUMP-MOTOR HOUSING BONDING JUMPER REMOVAL . . 43

### Page 47

December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 47 of 48
ALERT ALERT
Commercial
Airplane
Group 747
ALERTALERT
Service Bulletin
Number: 747-28A2033 Evaluation Form
Date: December 15, 1971
Revision 1: December 18, 2003
ATA System: 2820
SFB
SUBJECT: FUEL - Pump-Motor Housing External Bonding Jumper Installation
Use this evaluation form to tell us what you think of the quality of this service bulletin. We will use the data that
y o ug i v eu st oi m p r o v et h eq u a l i t yo fo u rs e r v i c eb u l l e t i n s .
Note: Please do not use this evaluation form to tell us to make changes to your manuals. To make these
changes, please use a Publication Change Request (PCR) form.
Please give us this data:
(If necessary, please use the other side. Thank you for the time you used to give us your comments.)
OPERATOR: ______________________________________ TODAY’S DATE:_______________________
PREPARED BY: ___________________________________ TITLE: ______________________________
ORGANIZATION: __________________________________ TELEX CODE: ________________________
TELEPHONE NUMBER: _____________________________ BASE: ______________________________
Please rate the quality of this service bulletin: (good) 4 3 2 1 (poor)
Please rate the quality of the illustrations: (good) 4 3 2 1 (poor)
Will you do the change given by this service bulletin? Yes___ No___ If not, please explain:
Is this service bulletin easy to understand? Yes___ No___ If not, please explain:
Is this service bulletin easy to use? Yes___ No___ If not, please explain:
Are the Planning Information, Material Information, and
Accomplishment Instructions accurate? Yes___ No___ If not, please explain:
Is the Manpower estimate accurate? Yes___ No___ If not, please explain:
Give the completed evaluation form to your Boeing Field Service Representative or send the evaluation form
directly to this address:
Manager, Service Bulletin Engineering
Boeing Commercial Airplanes Group
P.O. Box 3707, Mail Code 2H-36
Seattle, WA 98124-2207 USA

### Page 48

December 15, 1971
Revision 1: December 18, 2003 747-28A2033
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 48 of 48
BOEING SERVICE BULLETIN 747-28A2033
ALERT ALERT

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