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Commercial Airplanes MD80 Service Bulletin Number: MD80-28-226 Original Issue: April 14, 2010 ATA System: 2821 SUBJECT: FUEL - Switch, Fuel Level Float - Fuel Level Float and Pressure Switch In-Line Fuse Installation 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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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Original Issue: April 14, 2010 MD80-28-226 1 of 129
2.0
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BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION7
A. Effectivity7
1. Airplanes7
2. Spares Affected ........................................ 2 3 B. Concurrent Requirements ...................................... 2 3 C. Reason ................................................ 2 3 D. Description .............................................. 2 3 E. Compliance .............................................. 2 5 F. Approval ............................................... 2 5 G. Manpower .............................................. 2 5 H. Weight and Balance Changes .................................... 2 8 I. Electrical Load Data ......................................... 3 0 J. References .............................................. 3 0
1. Existing Data .......................................... 3 0
2. Data supplied with this Service Bulletin ............................ 3 0
3. Installation Drawings Used in the Preparation of this Service Bulletin ............ 3 0 K. Publications Affected ........................................ 3 1 L. Interchangeability and Intermixability of Parts ........................... 3 1
2. MATERIAL INFORMATION ........................................ 3 3 A. Material - Price and Availability ................................... 3 3 B. Industry Support Information .................................... 3 3 C. Parts Necessary For Each Airplane ................................. 3 3
1. Kits/Parts ............................................ 3 3
2. Parts and Materials Supplied by the Operator ........................ 4 3
3. Parts Modified and Reidentified ................................ 4 3
4. Parts Removed and Not Replaced .............................. 4 3 D. Parts Necessary to Change Spares ................................. 4 3 E. Special Tooling - Price and Availability ............................... 4 3 F. Special Tooling Necessary to do this Service Bulletin ....................... 4 3
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 4 5 A. GENERAL INFORMATION ..................................... 4 5 B. WORK INSTRUCTIONS ....................................... 4 6 FIGURE 1: FUEL LEVEL FLOAT SWITCH IN-LINE FUSE INSTALLATION [Group 1] ......... 7 4 FIGURE 2: FUEL LEVEL FLOAT SWITCH IN-LINE FUSE INSTALLATION [Group 2] ......... 7 7 FIGURE 3: FUEL LEVEL FLOAT SWITCH IN-LINE FUSE INSTALLATION [Group 3] ......... 8 0 FIGURE 4: FUEL LEVEL FLOAT SWITCH IN-LINE FUSE INSTALLATION [Group 4] ......... 8 3 FIGURE 5: FUEL LEVEL FLOAT SWITCH IN-LINE FUSE INSTALLATION [Group 5] ......... 8 6 FIGURE 6: FUEL LEVEL FLOAT SWITCH IN-LINE FUSE INSTALLATION [Group 6] ......... 8 9 FIGURE 7: FUEL LEVEL FLOAT AND PRESSURE SWITCH IN-LINE FUSE INSTALLATION [Group 7] .................................................. 9 3 FIGURE 8: FUEL LEVEL FLOAT AND PRESSURE SWITCH IN-LINE FUSE INSTALLATION [Group 8] .................................................. 9 7 FIGURE 9: FUEL LEVEL FLOAT AND PRESSURE SWITCH IN-LINE FUSE INSTALLATION [Group 9] ................................................. 1 0 1
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FIGURE 10: FUEL LEVEL FLOAT AND PRESSURE SWITCH IN-LINE FUSE INSTALLATION [Group 10] ................................................. 1 0 5 FIGURE 11: FUEL LEVEL FLOAT AND PRESSURE SWITCH IN-LINE FUSE INSTALLATION [Group 11] ................................................. 1 0 9 APPENDIX A: CONTINUITY CHECK [Group 1] ............................... 1 1 3 APPENDIX B: CONTINUITY CHECK [Group 2] ............................... 1 1 4 APPENDIX C: CONTINUITY CHECK [Group 3] ............................... 1 1 5 APPENDIX D: CONTINUITY CHECK [Group 4] ............................... 1 1 6 APPENDIX E: CONTINUITY CHECK [Group 5] ............................... 1 1 7 APPENDIX F: CONTINUITY CHECK [Group 6] ............................... 1 1 8 APPENDIX G: CONTINUITY CHECK [Group 7] ............................... 1 2 0 APPENDIX H: CONTINUITY CHECK [Group 8] ............................... 1 2 2 APPENDIX I: CONTINUITY CHECK [Group 9] ............................... 1 2 4 APPENDIX J: CONTINUITY CHECK [Group 10] .............................. 1 2 6 APPENDIX K: CONTINUITY CHECK [Group 11] .............................. 1 2 8
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Commercial Airplanes MD80 Service Bulletin SummaryNumber: MD80-28-226Original Issue: April 14, 2010 ATA System: 2821 SUBJECT: FUEL - Switch, Fuel Level Float - Fuel Level Float and Pressure Switch In-Line Fuse Installation
CONCURRENT REQUIREMENTS None.
BACKGROUND An investigation by Boeing has determined that fuel level float switch wires located on the left and right wing forward spars, the center tank forward spar, and the forward and aft auxiliary fuel tanks and pressure switch wires located on the center tank forward spar are routed in the same bundles as power wires. If a short circuit between a fuel level float or pressure switch wire and a power wire occurs, an over-current can cause excessive temperature in the fuel level float or pressure switch wire, resulting in damage and become a potential ignition source. Adding an in-line fuse as a self-contained component in each fuel level float and pressure switch circuit will minimize the possibility of excessive temperatures in the fuel level float or pressure switch wires. If not corrected, and there is a short circuit of a fuel level float or pressure switch wire to a power wire, possible damage to the fuel level float or pressure switch wire could occur, and become a potential ignition source for the fuel tank and consequent fire or explosion.
This service bulletin is the result of the safety assessments conducted by Boeing under a Special Federal Aviation Regulation (SFAR) 88, Fuel Tank System Fault Tolerance Evaluation Requirements.
ACTION Group 1-6:
This service bulletin installs fuel level float switch in-line fuses on the left, right, and center wing forward spars.
Group 7-8:
This service bulletin installs fuel level float and pressure switch in-line fuses on the left, right, center wing forward spars and aft auxiliary fuel tank.
Group 9-11:
This service bulletin installs fuel level float and pressure switch in-line fuses on the left, right, center wing forward spars, forward auxiliary fuel tank and aft auxiliary fuel tank.
EFFECTIVITY DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
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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 5 years, after the original issue date on 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 Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
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Commercial Airplanes MD80 Service Bulletin Number: MD80-28-226 Original Issue: April 14, 2010 ATA System: 2821 SUBJECT: FUEL - Switch, Fuel Level Float - Fuel Level Float and Pressure Switch In-Line Fuse Installation
1. PLANNING INFORMATION A. Effectivity
1. Airplanes NOTE: The intent of this installation was done on fuselage number 1851 prior to the original issue of this service bulletin in accordance with Service Rework Drawings SR09280098 Revision "D" and SR09280099 Revision "C".
This service bulletin is for the airplanes shown below.
NOTE: Float Switch Equipment Item Numbers listed below may not be installed. Installation of the Float Switches is based on existing Service Bulletins MD80-28-054 and MD80-28-058 incorporation.
Operators who have not accomplished these service bulletins and/or have not installed the Float Switches are not required to install the related float switch fuses outlined in Service Bulletin MD80-28-226.
If Service Bulletins MD80-28-054 and/or MD80-28-058 are accomplished post incorporation of Service Bulletin MD80-28-226, the related fuses must be installed in accordance with Service Bulletin MD80-28-226.
Zone LocationFuel TankRelated Fuse Item Numbers Float/Pressure Switch Equipment Item Number DescriptionService Bulletin Xrs = 91.000Left WingF1-107S1-577Installs left and right wing main fuel tank low level indication system.
MD80-28-054 Xrs = -91.000Right WingF1-106S1-578 Xrs = 91.000Left WingF1-108S1-581Installs alternate fuel burn system in the left main, right main, and center fuel tanks.
MD80-28-058 Xrs = -91.000Right WingF1-109S1-582 Xcw = -15.000Center WingF1-110S1-583
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DESCRIPTIONCONFIGURATIONGROUP Applicable to airplanes with left wing, right wing, and center wing fuel tanks affected by SR09280098-7001 drawing configuration.
-1 Applicable to airplanes with left wing, right wing, and center wing fuel tanks affected by SR09280098-7005 drawing configuration.
-2 Applicable to airplanes with left wing, right wing, and center wing fuel tanks affected by SR09280098-7007 drawing configuration.
-3 Applicable to airplanes with left wing, right wing, and center wing fuel tanks affected by SR09280098-7003 drawing configuration.
-4 Applicable to airplanes with left wing, right wing, and center wing fuel tanks affected by SR09280098-7009 drawing configuration.
-5 Applicable to airplanes with left wing, right wing, and center wing fuel tanks affected by SR09280098-7019 drawing configuration.
-6 Applicable to airplanes with left wing, right wing, center wing, and aft auxiliary fuel tanks affected by SR09280098-7021 drawing configuration.
-7 Applicable to airplanes with left wing, right wing, center wing, and aft auxiliary fuel tanks affected by SR09280098-7013 drawing configuration.
-8 Applicable to airplanes with left wing, right wing, center wing, forward auxiliary, and aft auxiliary fuel tanks affected by SR09280098-7015 drawing configuration.
-9 Applicable to DC-9-82 (MD-82), DC-9-83 (MD-83), and MD-88 airplanes with left wing, right wing, center wing, forward auxiliary, and aft auxiliary fuel tanks affected by SR09280098-7017 drawing configuration.
-10 Applicable to DC-9-87 (MD-87) airplanes with left wing, right wing, center wing, forward auxiliary, and aft auxiliary fuel tanks affected by SR09280098-7017 drawing configuration.
-11 Airplane Models:
DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88 GroupFuselage Number 41000 - 1004
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GroupFuselage Number 51005 41006 41011 51012 51016 41018 51019 51028 51031 41034 31043 41045 41047 41049 41051 41053 51055 51057 51059 - 1060 51063 - 1066 41067 51068 - 1070 41071 41073 51075 - 1079 31080 51082 51085 51087 31088 - 1089 51090 - 1092 51095 - 1103
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GroupFuselage Number 51105 - 1110 51112 - 1128 51130 51133 - 1134 41135 51136 - 1145 51147 - 1150 31151 - 1152 51153 - 1158 31159 51160 - 1162 31163 51164 - 1168 101169 31170 51171 - 1172 31174 51175 - 1176 101177 31178 - 1180 51181 41182 - 1183 31184 51185 - 1187 31188 - 1192 51193 31194 - 1200 11201 31202 - 1203 31205 - 1206 11208 101209
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GroupFuselage Number 31210 - 1223 31225 - 1234 101235 31236 - 1260 31262 - 1268 61269 - 1270 31271 61272 31273 101275 31276 - 1278 61279 31280 - 1284 61285 101286 31287 - 1290 31292 - 1304 101305 31306 - 1312 61313 31314 31316 - 1323 31325 31327 - 1330 101331 - 1332 111333 31334 31336 - 1339 101340 31341 101342 31344 - 1350
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GroupFuselage Number 31352 - 1353 101354 31355 101356 - 1358 31359 - 1366 101367 31368 - 1369 101370 - 1375 31376 - 1379 101380 31381 101382 - 1383 31384 101385 - 1393 31394 - 1395 101397 - 1398 31399 - 1405 101406 31407 - 1411 81412 101413 - 1415 31416 - 1420 101421 - 1423 81424 31425 - 1428 101429 31430 - 1434 101435 - 1438 31439 - 1451 111453 101454 - 1455 31456
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