| Fault Code Numbers (FCN) HW 131-9a | |||
| FCN | Fault Description | CFDS Message | Class |
| 001 | Speed Sensor shows amplitude failure | SPEED SENSOR (8060KM) | 1 |
| 002 | Speed Sensor 1 Failure and ECB internal failure | SPEED SENSOR (8060KM) AND ECB (59KD) | 1 |
| 003 | Speed Sensor 2 Failure and ECB internal failure | SPEED SENSOR (8060KM) AND ECB (59KD) | 1 |
| 004 | ECB internal Failure | ECB (59KD) | 1 |
| 005 | ECB internal Failure | ECB (59KD) | 1 |
| 006 | N O T U S E D | ||
| 007 | Speed Sensor 1 shows open circuit | SPEED SENSOR (8060KM) | 3 |
| 008 | Speed Sensor 2 shows open circuit | SPEED SENSOR (8060KM) | 3 |
| 009 | Speed Sensor 1 shows amplitude Failure | SPEED SENSOR (8060KM) | 3 |
| 010 | Speed Sensor 2 shows amplitude Failure | SPEED SENSOR (8060KM) | 3 |
| 011 | ECB internal Failure | ECB (59KD) | 3 |
| 012 | ECB internal Failure | ECB (59KD) | 3 |
| 013 | ECB internal Failure | ECB (59KD) | 3 |
| 014 | ECB internal Failure | ECB (59KD) | 3 |
| 015 | ECB internal Failure | ECB (59KD) | 1 |
| 016 | Delta Pressure Sensor shows out of range drift | DIFFERENTIAL PRESS XDCR (8043KM) | 1 |
| 017 | Delta Pressure Sensor shows out of range drift | DIFFERENTIAL PRESS XDCR (8043KM) | 1 |
| 018 | Delta Pressure Sensor shows out of range low | DIFFERENTIAL PRESS XDCR (8043KM) | 1 |
| 019 | Delta Pressure Sensor shows out of range high | DIFFERENTIAL PRESS XDCR (8043KM) | 1 |
| 020 | ECB internal Failure | ECB (59KD) | 2 |
| 021 | Inlet Pressure Sensor shows out of range | INLET PRESS XDCR(8048KM) | 2 |
| 022 | Inlet Pressure Sensor shows < 6.5 psia on gnd | INLET PRESS XDCR(8048KM) | 2 |
| 023 | Inlet Pressure Sensor shows out of range low | INLET PRESS XDCR(8048KM) | 2 |
| 024 | Inlet Pressure Sensor shows out of range high | INLET PRESS XDCR(8048KM) | 2 |
| 025 | ECB internal Failure | ECB (59KD) | 1 |
| 026 | Total Pressure Sensor shows out of range | TOTAL PRESS XDCR(8044KM) | 1 |
| 027 | Total Pressure and Inlet Pressure disagree | PRESS XDCR(8044KM)/ (8048KM) | 1 |
| 028 | Total Pressure Sensor shows out of range low | TOTAL PRESS XDCR(8044KM) | 1 |
| 029 | Total Pressure Sensor shows out of range high | TOTAL PRESS XDCR(8044KM) | 1 |
| 030 | Press XDCR wiring shows open circuit | CHECK PRESS XDCR WIRING (8001KM) | 1 |
| 031 | Press XDCR wiring short or ECB internal failure | CHECK PRESS XDCR WIRING (8001KM)/ ECB (59KD) | 1 |
| 032 | ECB internal Failure | ECB (59KD) | 1 |
| 033 | N O T U S E D | ||
| 034 | N O T U S E D | ||
| 035 | Both EGT Sensors failed | EGT TCPLE RAKES(8057KM1) AND (8057KM2) | 1 |
| 036 | EGT1 Sensor Failure and ECB Internal Failure | EGT TCPLE RAKE (8057KM1) AND ECB (59KD) | 1 |
| 037 | EGT2 Sensor Failure and ECB Internal Failure | EGT TCPLE RAKE (8057KM2) AND ECB (59KD) | 1 |
| 038 | ECB internal Failure | ECB (59KD) | 1 |
| 039 | N O T U S E D | ||
| 040 | ECB internal Failure | ECB (59KD) | 3 |
| 041 | N O T U S E D | ||
| 042 | EGT1 Sensor shows out of range low | EGT TCPLE RAKE (8057KM1) | 3 |
| 043 | EGT1 Sensor disagrees with EGT2 Sensor > 66C | EGT TCPLE RAKE (8057KM1) | 3 |
| 044 | ECB internal Failure | ECB (59KD) | 3 |
| 045 | N O T U S E D | ||
| 046 | EGT2 Sensor shows out of range low | EGT TCPLE RAKE (8057KM2) | 3 |
| 047 | EGT2 Sensor disagrees with EGT1 Sensor > 66C | EGT TCPLE RAKE (8057KM2) | 3 |
| 048 | N O T U S E D | ||
| 049 | N O T U S E D | ||
| 050 | ECB internal Failure | ECB (59KD) | 2 |
| 051 | Fuel Temp Sensor shows out of Range low | FUEL CONTROL UNIT (8022KM) | 2 |
| 052 | Fuel Temp Sensor shows out of Range high | FUEL CONTROL UNIT (8022KM) | 2 |
| 053 | ECB internal Failure | ECB (59KD) | 2 |
| 054 | Oil Temp Sensor shows out of Range low | OIL TEMP SENSOR (8092KM) | 2 |
| 055 | Oil Temp Sensor shows out of Range high | OIL TEMP SENSOR (8092KM) | 2 |
| 056 | ECB internal Failure | ECB (59KD) | 3 |
| 057 | Inlet Temp Sensor shows out of range low | INLET TEMP SENSOR (8010KM) | 3 |
| 058 | Inlet Temp Sensor shows out of range high | INLET TEMP SENSOR (8010KM) | 3 |
| 059 | N O T U S E D | ||
| 060 | Inlet Flap shows Flap open and Flap closed | AIR INTAKE FLAP ACTUATOR (4015KM) | 3 |
| 061 | Inlet Flap shows Flap open switch open | AIR INTAKE FLAP ACTUATOR (4015KM) | 3 |
| 062 | Inlet Flap shows Flap open and Flap closed | AIR INTAKE FLAP ACTUATOR (4015KM) | 3 |
| 063 | Inlet Flap shows Flap closed switch open | AIR INTAKE FLAP ACTUATOR (4015KM) | 3 |
| 064 | Inlet Flap shows Flap close circuit open | AIR INTAKE FLAP ACTUATOR (4015KM) | 2 |
| 065 | Inlet Flap shows Flap close circuit short | AIR INTAKE FLAP ACTUATOR(4015KM) | 2 |
| 066 | Inlet Flap shows Flap open circuit open | AIR INTAKE FLAP ACTUATOR (4015KM) | 2 |
| 067 | Inlet Flap shows Flap open circuit short | AIR INTAKE FLAP ACTUATOR (4015KM) | 2 |
| 068 | Inlet Flap shows Flap open high current | AIR INTAKE FLAP ACTUATOR (4015KM) | 1 |
| 069 | Inlet Flap shows Flap close high current | AIR INTAKE FLAP ACTUATOR (4015KM) | 2 |
| 070 | Inlet Flap shows Flap failed to open | AIR INTAKE FLAP ACTUATOR (4015KM) | 1 |
| 071 | Inlet Flap shows Flap loss of open indication | AIR INTAKE FLAP ACTUATOR (4015KM) | 1 |
| 072 | Inlet Flap shows Flap failed to fully close | AIR INTAKE FLAP ACTUATOR (4015KM) | 2 |
| 073 | N O T U S E D | ||
| 074 | N O T U S E D | ||
| 075 | Fuel Resolver Excitation Circuit Failure | FUEL CONTR0L UNIT (8022KM) / ECB (59KD) | 2 |
| 076 | Fuel Resolver Primary shows open circuit | FUEL CONTROL UNIT (8022KM) | 2 |
| 077 | Fuel Resolver Secondary shows open circuit | FUEL CONTROL UNIT (8022KM) | 2 |
| 078 | Fuel Resolver position shows incorrect position | FUEL CONTROL UNIT (8022KM) | 2 |
| 079 | Fuel flow disagrees with command | FUEL CTRL UNIT (8022KM)/ APU FUEL SUPPLY | 1 |
| 080 | IGV LVDT Excitation circuit failure | IGV ACTUATOR (8014KM) / (ECB (59KD) | 2 |
| 081 | IGV LVDT primary shows open circuit | IGV ACTUATOR (8014KM) | 2 |
| 082 | IGV LVDT secondary shows open circuit | IGV ACTUATOR (8014KM) | 2 |
| 083 | IGV position disagrees with command | CHECK IGV ASSEMBLY/ IGV ACTUATOR (8014KM) | 1 |
| 084 | SCV LVDT Excitation Circuit Failure | SURGE CONTROL VALVE (8058KM)/ ECB (59KD) | 1 |
| 085 | SCV LVDT primary shows open circuit | SURGE CONTROL VALVE (8058KM) | 1 |
| 086 | SCV LVDT secondary shows open circuit | SURGE CONTROL VALVE (8058KM) | 1 |
| 087 | SCV position disagrees with command | SURGE CONTROL VALVE (8058KM) | 1 |
| 088 | Load Control Valve shows not open | LOAD CONTROL VALVE (8050KM) | 2 |
| 089 | Bleed Shutoff due to reverse flow condition | SCV (8058KM) / PRESS XDCRS (8043KM)/(8044KM) | 1 |
| 090 | Bleed Shutoff due to high temperature | CHECK IGV ASSEMBLY / IGV ACTUATOR (8014KM) | 1 |
| 091 | Bleed Shutoff due to reverse flow condition | SCV (8058KM) / PRESS XDCRS (8043KM)/(8044KM) | 1 |
| 092 | Load Control Valve shows not closed | LOAD CONTROL VALVE (8050KM) | 2 |
| 093 | Load Control Valve shows open and closed | LOAD CONTROL VALVE (8050KM) | 2 |
| 094 | NOT USED | ||
| 095 | A/C pin coding disagrees | WRG: ACFT PIN PROG/ ECB (59KD) | 3 |
| 096 | Load Control Valve shows open switch failure | LOAD CONTROL VALVE (8050KM) | 2 |
| 097 | Load Control Valve shows closed switch failure | LOAD CONTROL VALVE (8050KM) | 2 |
| 098 | Low Oil Pressure switch shows open circuit | LOW OIL PRESS SW(8091KM) | 2 |
| 099 | N O T U S E D | ||
| 100 | Fuel Pressure Shows Low During APU Run | LOW FUEL PRESSURE | 2 |
| 101 | Oil filter switch shows electrical ground | OIL FILTER SWITCHES (8070KM)/(8071KM) | 3 |
| 102 | Oil filter shows clogged | GEN SCAV + LUBE FILTERS (8069KM) / (8076KM) | 1 |
| 103 | N O T U S E D | ||
| 104 | N O T U S E D | ||
| 105 | Fuel Torque Motor shows open circuit | FUEL CONTROL UNIT (8022KM) | 1 |
| 106 | Fuel Torque Motor shows open circuit | FUEL CONTROL UNIT (8022KM) | 1 |
| 107 | Fuel Torque Motor shows short circuit | FUEL CONTROL UNIT (8022KM) | 1 |
| 108 | Fuel Torque Motor shows short circuit | FUEL CONTROL UNIT (8022KM) | 1 |
| 109 | IGV Torque Motor shows open circuit | IGV ACTUATOR (8014KM) | 1 |
| 110 | IGV Torque Motor shows short circuit | IGV ACTUATOR (8014KM) | 1 |
| 111 | SCV Torque Motor shows open circuit | SURGE CONTROL VALVE (8058KM) | 1 |
| 112 | SCV Torque Motor shows short circuit | SURGE CONTROL VALVE (8058KM) | 1 |
| 113 | Starter Motor shows open circuit | STARTER MOTOR (8KA) | 1 |
| 114 | Starter Motor shows short circuit | STARTER MOTOR (8KA) | 1 |
| 115 | Oil Heater failure | APU OIL HEATER (8093KM) | 2 |
| 116-119 | N O T U S E D | ||
| 120 | Backup Start Contactor shows open circuit | CONTACTOR (10KA) | 1 |
| 121 | Backup Start Contactor shows closed | CONTACTOR (10KA) | 3 |
| 122 | N O T U S E D | ||
| 123 | Main Start Contactor shows open circuit | ACFT BAT NOT SELECTED / CONTACTOR (5KA) | 1 |
| 124 | Main Start Contactor shows closed | CONTACTOR (5KA) | 3 |
| 125 | Fuel Solenoid shows circuit failure | FUEL CONTROL UNIT (8022KM) | 1 |
| 126 | Flow Divider Solenoid shows circuit failure | FLOW DIVIDER SOL(8025KM) | 1 |
| 127 | Load Valve Solenoid shows circuit failure | LOAD CONTROL VALVE (8050KM) | 1 |
| 128 | Ignition Unit shows open circuit | IGNITION EXCITER (8030KM) | 1 |
| 129 | I N T E R N A L E C B | -- | - |
| 130 | APU available shows circuit failure | WRG:APU AVAILABLE | 2 |
| 131 | I N T E R N A L E C B | -- | - |
| 132 | I N T E R N A L E C B | -- | - |
| 133 | Deoil Solenoid shows open circuit | DEOIL SOLENOID (8083KM) | 1 |
| 134 | Deoil Solenoid shows circuit failure | DEOIL SOLENOID (8083KM) | 1 |
| 135 | I N T E R N A L E C B | -- | - |
| 136 | Fault Relay shows circuit failure | WRG: APU FAULT RELAY | 2 |
| 137 | I N T E R N A L E C B | -- | - |
| 138 | Load Valve Open Signal shows circuit failure | WRG: LOAD VALVE OPEN SIGNAL | 2 |
| 139 | Low Fuel Pressure Relay shows open circuit | FIRE EMERG STOP RLY(6WF) | 2 |
| 140 | Low Fuel Pressure Relay shows circuit failure | FIRE EMERG STOP RLY(6WF) | 2 |
| 141 | I N T E R N A L E C B | -- | - |
| 142 | I N T E R N A L E C B | -- | - |
| 143 | I N T E R N A L E C B | -- | - |
| 144 | APU Start in progress shows circuit failure | WRG: START IN PROGRESS | 2 |
| 145 | I N T E R N A L E C B | -- | - |
| 146 | Ignition unit shows short circuit | IGNITION EXCITER (8030KM) | 1 |
| 147 | ECB Internal Failure | ECB (59KD) | 1 |
| 148-149 | N O T U S E D | ||
| 150 | ECS Zone Controller ECS Demand failure | NO DEMAND DATA FROM ECS | 3 |
| 151 | ECS Zone Controller Pack Data failure | NO PACK DATA FROM ECS | 3 |
| 152 | CFDIU BITE Command failure | NO DATA FROM CFDIU | 3 |
| 153 | CFDIU Flight Phase failure | NO DATA FROM CFDIU | 3 |
| 154 | CFDIU AC Config failure | NO DATA FROM CFDIU | 3 |
| 155 | CFDIU Date failure | NO DATA FROM CFDIU | 3 |
| 156 | CFDIU GMT failure | NO DATA FROM CFDIU | 3 |
| 157 | CFDIU AC ID failure | NO DATA FROM CFDIU | 3 |
| 158 | CFDIU AC ID failure | NO DATA FROM CFDIU | 3 |
| 159 | CFDIU AC ID failure | NO DATA FROM CFDIU | 3 |
| 160-169 | N O T U S E D | ||
| 170 | ECB internal Failure | ECB (59KD) | 1 |
| 171 | ECB internal Failure | ECB (59KD) | 1 |
| 172 | ECB Internal Failure | ECB (59KD) | 1 |
| 173 | ECB Internal Failure | ECB (59KD) | 1 |
| 174 | ECB internal Failure | ECB (59KD) | 3 |
| 175 | ECB internal Failure | ECB (59KD) | 3 |
| 176 | ECB internal Failure | ECB (59KD) | 1 |
| 177 | ECB internal Failure | ECB (59KD) | 1 |
| 178 | ECB internal Failure | ECB (59KD) | 1 |
| 179 | ECB internal Failure | ECB (59KD) | 1 |
| 180 | ECB internal Failure | ECB (59KD) | 1 |
| 181 | ECB internal Failure | ECB (59KD) | 2 |
| 182 | ECB internal Failure | ECB (59KD) | 2 |
| 183 | Power Supply Interrupt | POWER SUPPLY INTERRUPT | 2 |
| 184 | ECB Internal Failure | ECB (59KD) | 2 |
| 185 | ECB Internal Failure | ECB (59KD) | 1 |
| 186 | ECB Internal Failure | ECB (59KD) | 1 |
| 187-200 | N O T U S E D | ||
| 201 | No LRU Fault detected | FUEL CTRL UNIT (8022KM) / ECB (59KD) | 1 |
| 202 | No LRU Fault detected | -- | 1 |
| 203 | No LRU Fault detected | -- | 1 |
| 204 | No LRU Fault detected | FCU (8022KM) / APU FUEL SUPPLY / APU ROTATION | 1 |
| 205 | No LRU Fault detected | IGV ACTUATOR (8014KM)/ ECB (59KD) | 1 |
| 206 | No LRU Fault detected | FUEL CTRL UNIT (8022KM)/ FLOW DIVIDER (8024KM) | 1 |
| 207 | No LRU Fault detected | -- | - |
| 208 | No LRU Fault detected | LOP SW(8091KM)/OIL PUMP (8080KM)/DEOIL (8083KM) | 1 |
| 209 | No LRU Fault detected | CHECK IGNITION SYSTEM / FCU(8022KM)/FUEL SUPPLY | 1 |
| 210 | No LRU Fault detected | -- | - |
| 211 | No LRU Fault detected | OIL COOLER (8079KM) / COOLING FAN (8053KM) | 1 |
| 212 | No LRU Fault detected | STARTER MOTOR (8KA) / APU ROTATION | 1 |
| 213 | No LRU Fault detected | CHECK APU INLET | 1 |
| 214 | No LRU Fault detected | -- | - |
| 215 | No LRU Fault detected | FCU(8022KM)/FUEL SUPPLY/ STARTER MOTOR (8KA) | 1 |
| 216 | No LRU Fault detected | PRESS XDCRS (8044KM) / (8043KM) / SCV (8058KM) | 1 |
| 217 | No LRU Fault detected | -- | 1 |
| 218 | Power supply interrupt | POWER SUPPLY INTERRUPT | 1 |
| 219-229 | N O T U S E D | ||
| 230 | ECB internal Failure | ECB (59KD) | 1 |
| 231 | ECB internal Failure | ECB (59KD) | 3 |
| 232 | ECB internal Failure | ECB (59KD) | 3 |
| 233 | ECB internal Failure | ECB (59KD) | 2 |
| 234 | ECB internal Failure | ECB (59KD) | 3 |
| 235 | ECB internal Failure | ECB (59KD) | 3 |
| 236 | ECB internal Failure | ECB (59KD) | 2 |
| 237 | ECB Internal Failure | ECB (59KD) | 3 |
| 238 | ECB Internal Failure | ECB (59KD) | 3 |
| 239 | I N T E R N A L E C B | -- | - |
| 240 | N O T U S E D | ||
| 241 | Data Memory Module shows read failure | DATA MEMORY MODULE (8062KM) | 3 |
| 242 | Data Memory Module shows checkword failure | DATA MEMORY MODULE (8062KM) | 3 |
| 243 | Data Memory Module shows APU S/N failure | DATA MEMORY MODULE (8062KM) | 3 |
| 244 | Data Memory Module shows write failure | DATA MEMORY MODULE (8062KM) | 3 |
| 245 | Oil Level Shows Low | LOW OIL LEVEL | 2 |
| 246-299 | N O T U S E D | ||
| 300 | ECB internal Failure | -- | 1 |
| 301 | ECB internal Failure | -- | 1 |
| 302 | I N T E R N A L E C B | -- | - |
| 303 | ECB internal Failure | -- | 1 |