# Boeing Service Bulletin MD90-28-010: Revision 1

- Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2008-0934; AD 2010-25-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Boeing Service Bulletin MD90-28-010](https://openairdocs.org/service-documents/boeing/md90-28-010.md)
- Title as filed: U.S. DOT/FAA - Service Bulletin
- Pages: 23
- PDF: https://openairdocs.org/files/sha256/0e/f2/0ef2625d041aee5b29ce2e04f0e808b1c32576b5b163f07b63745d9b546650b3
- Page: https://openairdocs.org/service-documents/boeing/md90-28-010/file/0ef2625d041a

## Text

Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

McDonnell DouglasCommercial 
Airplanes
MD90
Service Bulletin
Number: MD90-28-010
Original Issue: February 22, 2008
Revision 1: June 16, 2009
ATA System: 2800
SUBJECT: FUEL - Fuel Systems - Change or Replace Fuel Boost Pumps
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 © 2008 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Unpublished Work - All Rights Reserved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, 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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.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: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
1 of 23
2.0

### Page 2

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
2 of 23
BOEING SERVICE BULLETIN MD90-28-010
BLANK PAGE

### Page 3

Table of Contents
Revision Transmittal Sheet ............................................ 5
Summary ..................................................... 7
1. PLANNING INFORMATION ........................................ 1 1
A. Effectivity ............................................... 1 1
1. Airplanes ............................................ 1 1
2. Spares Affected ........................................ 1 3
B. Concurrent Requirements ...................................... 1 3
C. Reason ................................................ 1 4
D. Description .............................................. 1 4
E. Compliance .............................................. 1 5
F . Approval ............................................... 1 5
G. Manpower .............................................. 1 5
H. Weight and Balance Changes .................................... 1 6
I. Electrical Load Data ......................................... 1 6
J. References .............................................. 1 6
1. Existing Data: .......................................... 1 6
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 7
2. MATERIAL INFORMATION ........................................ 1 9
A. Material - Price and Availability ................................... 1 9
B. Industry Support Information .................................... 1 9
C. Parts Necessary For Each Airplane ................................. 1 9
1. Kits/Parts: ............................................ 1 9
2. Parts and Materials Supplied by the Operator: ........................ 1 9
3. Parts Modified and Reidentified: ................................ 1 9
4. Parts Removed and Not Replaced: .............................. 1 9
D. Parts Necessary to Change Spares ................................. 2 0
E. Special Tooling - Price and Availability ............................... 2 0
F . Special Tooling Necessary to do this Service Bulletin ....................... 2 0
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 1
A. GENERAL INFORMATION ..................................... 2 1
B. WORK INSTRUCTIONS ....................................... 2 1
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
3 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 4

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
4 of 23
BOEING SERVICE BULLETIN MD90-28-010
BLANK PAGE

### Page 5

McDonnell DouglasCommercial 
Airplanes
MD90
Service Bulletin
Revision Transmittal SheetNumber: MD90-28-010Original Issue: February 22, 2008
Revision 1: June 16, 2009
ATA System: 2800
SUBJECT: FUEL - Fuel Systems - Change or Replace Fuel Boost Pumps
This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION
Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2008-NM-113-AD, is related to this
service bulletin.
No more work is necessary on airplanes changed in accordance with the original issue of this service bulletin.
REASON FOR REVISION
This revision is sent to change the Revision level of Argo-Tech Service Bulletin 398000-28-2 to Revision 1.
These sections were changed:
1. In Paragraph 1.B., Concurrent Requirements, changed Argo-Tech Service Bulletin Revision level.
2. In Paragraph 1.D., Description, added Affected Maintenance Zone Tables.
3. In Paragraph 1.E., Compliance, added Notice of Proposed Rule Making (NPRM) statements.
4. In Paragraph 1.F ., Approval, added Revision 1.
5. In Paragraph 1.J.1., Existing Data, changed Argo-Tech Bulletin 398000-28-2 Revision level and added FAA
Notice of Proposed Rule Making.
6. In Paragraph 1.K., Publication Affected, removed Special Compliance Item Report Revision level.
7. In Paragraph 2.E., Special Tooling - Price and Availability removed special tooling statement.
8. In Paragraph 2.F ., Special Tooling Necessary to do this Service Bulletin, changed statement.
9. In Paragraph 3.B., Work Instructions, changed Argo-Tech Service Bulletin 398000-28-2 Revision level.
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.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
5 of 23

### Page 6

REVISION HISTORY
February 22, 2008Original Issue:
June 16, 2009Revision 1:
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
6 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 7

McDonnell DouglasCommercial 
Airplanes
MD90
Service Bulletin
SummaryNumber: MD90-28-010Original Issue: February 22, 2008
Revision 1: June 16, 2009
ATA System: 2800
SUBJECT: FUEL - Fuel Systems - Change or Replace Fuel Boost Pumps
CONCURRENT REQUIREMENTS
Refer to Paragraph 1.B., Concurrent Requirements.
BACKGROUND
The Special Federal Aviation Regulation (SFAR 88) safety review has determined the need to protect the fuel
boost pump stator lead wires from being able to contact the pump rotor/shaft assembly. Lead wire contact and
the resulting chafing may result in an ignition source (energized rotor assembly) being produced in the fuel boost
pump inlet that could propagate into the fuel tank when the fuel boost pump inlet is not fully covered by fuel.
Replacement of the fuel boost pump will minimize the risk of a potential arc/spark condition that may occur within
the airplane's fuel tanks at critical fuel boost pumps in the center wing and forward auxiliary tanks. If not corrected,
there is a potential that an arc/spark condition could occur within the fuel boost pumps and propagate into the
fuel tank.
This service bulletin is the result of the safety assessments conducted by Boeing under SFAR 88, "Fuel Tank
System Fault Tolerance Evaluation Requirements".
ACTION
Refer to Paragraph 1.D., Description.
EFFECTIVITY
MD-90-30 Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes.
COMPLIANCE
Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2008-NM-113-AD, is related to this
service bulletin.
Boeing recommends accomplishment of this service bulletin within 5 years after original issue date of service
bulletin
INDUSTRY SUPPORT INFORMATION
Boeing warranty remedies are not available for the configuration changes given in this service bulletin.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
7 of 23

### Page 8

MANPOWER
Group 1, Configuration 1-2:
Elapsed HoursTotal Task HoursAirplanes
*3.0*3.0MD-90-30
Group 2, Configuration 1-2:
Elapsed HoursTotal Task HoursAirplanes
*4.5*4.5MD-90-30
* The manpower required to change fuel boost pump in accor-
dance with Argo-Tech Service Bulletin listed in Paragraph 1.J.1.,
Existing Data are not included.
MATERIAL INFORMATION
Refer to Paragraph 2.A., Material - Price and Availability.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
8 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 9 (OCR)

BOEING SERVICE BULLETIN MD90-28-010
GROUP 2
FORWARD AUXILIARY TANK
GROUPS 1 AND 2
CENTER WING TANK
CHANGE OR REPLACE FUEL BOOST PUMPS  1383116
Original Issue: February 22, 2008
Revision 1: June 16, 2009  MD90-28-010
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.  9 of 23

### Page 10

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
10 of 23
BOEING SERVICE BULLETIN MD90-28-010
BLANK PAGE

### Page 11

McDonnell DouglasCommercial 
Airplanes
MD90
Service Bulletin
Number: MD90-28-010
Original Issue: February 22, 2008
Revision 1: June 16, 2009
ATA System: 2800
SUBJECT: FUEL - Fuel Systems - Change or Replace Fuel Boost Pumps
1.    PLANNING INFORMATION
A. Effectivity
1. Airplanes
This service bulletin is for the airplanes shown below.
DESCRIPTIONCONFIGURATIONGROUP
Change or replace fuel boost pumps on center wing tank.-1
Applicable to airplanes with fuel boost pump 398000-1.1
Applicable to airplanes with fuel boost pump 65-5093-4.2
Change or replace fuel boost pumps on center wing and forward
auxiliary tanks.
-2
Applicable to airplanes with fuel boost pump 398000-1.1
Applicable to airplanes with fuel boost pump 65-5093-4.2
Airplane Models:
MD-90-30
GroupFuselage Num-
ber
12094 - 2100
12115
12117
12120
12122 - 2123
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
11 of 23

### Page 12

GroupFuselage Num-
ber
12125 - 2126
12129
12131
12133
12136
12138
12140 - 2144
12146 - 2147
12149 - 2150
12153 - 2154
12156 - 2159
12161 - 2166
12169 - 2171
12173
12175
12177
12179
12181 - 2182
12184
12186
12190 - 2191
12193 - 2194
22195
12197 - 2198
12200
12202 - 2203
12205
12207
12209 - 2213
12215 - 2217
12219 - 2233
12235 - 2237
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
12 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 13

GroupFuselage Num-
ber
12240
22243
12245
12248
12250 - 2251
12253
12255 - 2263
12288 - 2290
14001 - 4002
2. Spares Affected
Group 1-2, Configuration 1:
Examine your spares supply for the parts or components identified in Paragraph 2.D., Parts
Necessary to Change Spares. If any parts or components are found, refer to Paragraph 2.D for
spares modification information.
Group 1-2, Configuration 2:
None.
B. Concurrent Requirements
Group 1-2, Configuration 1:
The service bulletin listed below must be done at the same time as this service bul-
letin:
DescriptionService BulletinCompany
Change or replace fuel boost pump 398000-
1 to 398000-2 configuration.
398000-28-2 Revision 1Argo-Tech
Argo-Tech CorporationA copy may be ob-
tained from: 23555 Euclid Avenue
Cleveland, Ohio 44117 USA
Phone: (216) 692-7151
Group 1-2, Configuration 2:
None.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
13 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 14

C. Reason
The Special Federal Aviation Regulation (SFAR 88) safety review has determined the need to protect
the fuel boost pump stator lead wires from being able to contact the pump rotor/shaft assembly. Lead
wire contact and the resulting chafing may result in an ignition source (energized rotor assembly) being
produced in the fuel boost pump inlet that could propagate into the fuel tank when the fuel boost pump
inlet is not fully covered by fuel. Replacement of the fuel boost pump will minimize the risk of a potential
arc/spark condition that may occur within the airplane's fuel tanks at critical fuel boost pumps in the
center wing and forward auxiliary tanks. If not corrected, there is a potential that an arc/spark condition
could occur within the fuel boost pumps and propagate into the fuel tank.
This service bulletin is the result of the safety assessments conducted by Boeing under SFAR 88, "Fuel
Tank System Fault Tolerance Evaluation Requirements".
Revision 1 is sent to change the Revision level of Argo-Tech Service Bulletin 398000-28-2 to Revision
1.
D. Description
Group 1, Configuration 1:
This service bulletin provides instructions to change fuel boost pumps on center wing tank in accordance
with Argo-Tech Service Bulletin listed in Paragraph 1.J.1., Existing Data or replace with part number
398000-2.
Group 1, Configuration 2:
This service bulletin provides instructions to replace fuel boost pumps on center wing tank with part
number 398000-2.
Group 2, Configuration 1:
This service bulletin provides instructions to change fuel boost pumps on center wing and forward
auxiliary tanks in accordance with Argo-Tech Service Bulletin listed in Paragraph 1.J.1., Existing Data
or replace with part number 398000-2.
Group 2, Configuration 2:
This service bulletin provides instructions to replace fuel boost pumps on center wing and forward
auxiliary tanks with part number 398000-2.
Revision 1 - No more work is necessary on airplanes changed in accordance with the original issue of
this service bulletin.
The work in this service bulletin is done in the maintenance zone(s) given below.
Group 1:
Affected Maintenance Zones
ZoneModel
621MD-90-30
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
14 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 15

Group 2:
Affected Maintenance Zones
ZoneModel
222, 621MD-90-30
E. Compliance
Federal Aviation Administration (FAA) Notice of Proposed Rule Making 2008-NM-113-AD, is related
to this service bulletin.
Boeing recommends accomplishment of this service bulletin within 5 years after original issue date of
service bulletin.
F. Approval
The resultant modification described in Paragraph 1.D has been shown to comply with the applicable
Federal Aviation Regulations and Revision 1 is approved by the Manager, Los Angeles Aircraft
Certification Office, FAA Northwest Mountain Region.
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
— Time to schedule the work
— Time to examine the work
— Time to cure the materials
— Time to make the parts
— Time to find the tools.
Group 1, Configuration 1-2:
Elapsed HoursTask HoursNumber of PersonsTask
0.50.51Open Access
1.01.01Change or replace
0.50.51Close Access
1.01.01Functional Test
3.03.0TOTAL FOR EACH AIRPLANE
Group 2, Configuration 1-2:
Elapsed HoursTask HoursNumber of PersonsTask
1.01.01Open Access
1.51.51Change or replace
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
15 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 16

Group 2, Configuration 1-2:
Elapsed HoursTask HoursNumber of PersonsTask
1.01.01Close Access
1.01.01Functional Test
4.54.5TOTAL FOR EACH AIRPLANE
The manpower required to change fuel boost pump in accordance with Argo-Tech
Service Bulletin listed in Paragraph 1.J.1., Existing Data are not included.
H. Weight and Balance Changes
None.
I. Electrical Load Data
Not changed.
J. References
1. Existing Data:
a. Argo-Tech Service Bulletin 398000-28-2 Revision 1.
b. Federal Aviation Administration, Special Federal Aviation Regulation (SFAR) 88.
c. FAA Notice of Proposed Rule Making 2008-NM-113-AD.
d. MD-90 Aircraft Maintenance Manual (AMM) 28-22-01.
2. Data supplied with this Service Bulletin:
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin:
ChangeTitleDrawing Number
NewReplacement Installation - Fuel PumpSR90280005
This drawing is used to prepare this service bulletin. This drawing is not necessary to make the
specified changes, and is not supplied with this service bulletin.This drawing may not be applicable
to all airplane configurations or operators.
K. Publications Affected
Chapter-SectionPublication
28-22 and 28-23Illustrated Parts Catalog
MDC-92K9145 (CDCCL 28-2)Special Compliance Item Report
28-20-6Supplier Component Maintenance Manual
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
16 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 17

L. Interchangeability and Intermixability of Parts
The new fuel boost pump part number 398000-2 is the only part number that may be installed in the
center wing tank and forward auxiliary tank.
The new fuel boost pump part number 398000-2 may also be installed in all other tanks as an alternate
part number.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
17 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 18

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
18 of 23
BOEING SERVICE BULLETIN MD90-28-010
BLANK PAGE

### Page 19

2.    MATERIAL INFORMATION
A. Material - Price and Availability
Refer to Argo-Tech Service Bulletin listed in Paragraph 1.J.1., Existing Data.
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:
Group 1-2, Configuration 1:
Refer to Argo-Tech Service Bulletin listed in Paragraph 1.J.1., Existing Data.
Group 1, Configuration 2:
Existing Part NumberNameQTYNew Part Number
65-5093-4Fuel Boost Pump2398000-2
Group 2, Configuration 2:
Existing Part NumberNameQTYNew Part Number
65-5093-4Fuel Boost Pump4398000-2
2. Parts and Materials Supplied by the Operator:
Group 1-2, Configuration 1:
Refer to Argo-Tech Service Bulletin listed in Paragraph 1.J.1., Existing Data.
Group 1-2, Configuration 2:
None.
3. Parts Modified and Reidentified:
Group 1-2, Configuration 1:
Refer to Argo-Tech Service Bulletin listed in Paragraph 1.J.1., Existing Data.
Group 1-2, Configuration 2:
None.
4. Parts Removed and Not Replaced:
Group 1-2, Configuration 1:
Refer to Argo-Tech Service Bulletin listed in Paragraph 1.J.1., Existing Data.
Group 1-2, Configuration 2:
None.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
19 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 20

D. Parts Necessary to Change Spares
Group 1-2, Configuration 1:
Refer to Argo-Tech Service Bulletin listed in Paragraph 1.J.1., Existing Data.
Group 1-2, Configuration 2:
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.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
20 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 21

3.    ACCOMPLISHMENT INSTRUCTIONS
A. GENERAL INFORMATION
WARNING: IF ELECTRICAL POWER IS APPLIED TO THE AIRPLANE, MAKE SURE YOU OBEY
ALL PRECAUTIONS WHILE YOU DO WORK. IF YOU DO NOT OBEY THE
PRECAUTIONS, DEATH OR INJURY TO PERSONS, AND DAMAGE TO THE AIRPLANE
CAN OCCUR.
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.
CAUTION: ELECTRICALL Y GROUND THE AIRPLANE. THIS WILL HELP TO PREVENT DAMAGE
TO THE AIRPLANE OR EQUIPMENT.
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.
B. WORK INSTRUCTIONS
Group 1, Configuration 1:
1. Open access panel 620AT. Refer to MD-90 AMM 28-22-01.
2. Remove center wing tank fuel boost pumps in accordance with MD-90 AMM 28-22-01.
3. Change or replace the fuel boost pumps in accordance with Argo-Tech Service Bulletin 398000-28-2
Revision 1.
4. Install center wing tank fuel boost pumps part number 398000-2 in accordance with MD-90 AMM
28-22-01.
5. Close access panel 620AT. Refer to MD-90 AMM 28-22-01.
6. Do an operational test of the center wing tank fuel boost pumps in accordance with MD-90 AMM
28-22-01.
7. Put the airplane back to a serviceable condition.
Group 1, Configuration 2:
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
21 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 22

1. Open access panel 620AT. Refer to MD-90 AMM 28-22-01.
2. Replace center wing tank fuel boost pumps with part number 398000-2 in accordance with MD-90
AMM 28-22-01.
3. Close access panel 620AT. Refer to MD-90 AMM 28-22-01.
4. Do an operational test of the center wing tank fuel boost pumps in accordance with MD-90 AMM
28-22-01.
5. Put the airplane back to a serviceable condition.
Group 2, Configuration 1:
1. Open access panels 620AT, 222CF , 222FF , and 222HF . Refer to MD-90 AMM 28-22-01.
2. Remove center wing tank fuel boost pumps in accordance with MD-90 AMM 28-22-01.
3. Remove forward auxiliary tank fuel boost pumps in accordance with MD-90 AMM 28-22-01.
4. Change or replace the fuel boost pumps in accordance with Argo-Tech Service Bulletin 398000-28-2
Revision 1.
5. Install center wing tank fuel boost pumps part number 398000-2 in accordance with MD-90 AMM
28-22-01.
6. Install forward auxiliary tank fuel boost pumps part number 398000-2 in accordance with MD-90
AMM 28-22-01.
7. Close access panel 620AT. Refer to MD-90 AMM 28-22-01.
8. Do an operational test on the center wing and forward auxiliary tank fuel boost pumps in accordance
with MD-90 AMM 28-22-01.
9. Close access panels 222CF , 222FF , and 222HF . Refer to MD-90 AMM 28-22-01.
10. Put the airplane back to a serviceable condition.
Group 2, Configuration 2:
1. Open access panels 620AT, 222CF , 222FF , and 222HF . Refer to MD-90 AMM 28-22-01.
2. Replace center wing tank fuel boost pumps with part number 398000-2 in accordance with MD-90
AMM 28-22-01.
3. Replace forward auxiliary tank fuel boost pumps with part number 398000-2 in accordance with
MD-90 AMM 28-22-01.
4. Close access panel 620AT. Refer to MD-90 AMM 28-22-01.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
22 of 23
BOEING SERVICE BULLETIN MD90-28-010

### Page 23

5. Do an operational test on the center wing and forward auxiliary tank fuel boost pumps in accordance
with MD-90 AMM 28-22-01.
6. Close access panels 222CF , 222FF , and 222HF . Refer to MD-90 AMM 28-22-01.
7. Put the airplane back to a serviceable condition.
BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: February 22, 2008
MD90-28-010Revision 1: June 16, 2009
23 of 23
BOEING SERVICE BULLETIN MD90-28-010

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.