CHAPTER 24
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 ELECTRICAL POWER
 TABLE OF CONTENTS
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 SUBJECT_______ CH/SE/SU _ PAGE EFFECTIVITY
________ C ____ ___________ Internal Passive Failure of the 224 ALL BCL2 Failure of the Electrical Wiring 225 ALL between the BCL1 and the ADIRU1 or the LGCIU Failure of the Electrical Wiring 227 ALL between the BCL2 and the ADIRU1 or the LGCIU Failure of the Supply from the 229 ALL 28VDC HOT BUS (701PP) Failure of the Supply from the HOT 230 ALL BUS (702PP) Failure of the BAT1 FAULT 231 ALL Indication Circuit Failure of the BAT2 FAULT 233 ALL Indication Circuit Loss of the NOSE L/G LOCKED-UP 235 ALL Signal to the BCL1 Loss of the NOSE L/G LOCKED-UP 236 ALL Signal to the BCL2 Loss of the EMERGENCY 237 ALL CONFIGURATION Signal to the BCL1 Loss of the EMERGENCY 239 ALL CONFIGURATION Signal to the BCL2 Loss of the Battery 1 because of 241 ALL an Undervoltage or a Failure of the Voltage Sensing Circuit Loss of the Battery 2 because of 244 ALL an Undervoltage or a Failure of the Voltage Sensing Circuit Abnormal Power Consumption on the 247 ALL 28VDC HOT BUS (701PP) Abnormal Power Consumption on the 252 ALL 28VDC HOT BUS (702PP) Intermittent Warning because of an 257 ALL Internal Failure of the BCL1 Intermittent Warning because of an 258 ALL Internal Failure of the BCL2 Incorrect Discharge of the Battery 259 ALL 2 Failure of the ELEC/BAT2 266 ALL Pushbutton Switch Circuit Failure of the ELEC/BAT1 269 ALL Pushbutton Switch Circuit No Electrical Parameters of the 272 ALL BAT1 are shown on the ELEC Page
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 TABLE OF CONTENTS
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 SUBJECT_______ CH/SE/SU _ PAGE EFFECTIVITY
________ C ____ ___________ No Electrical Parameters of the 273 ALL BAT2 are shown on the ELEC Page Incorrect Discharge of the Battery 274 ALL 1 BAT1 and BAT2 disconnected some 281 ALL seconds after the BAT1 and BAT2 Pushbutton Switches are pushed Incorrect ARINC Coding of BCL 1 283 ALL Incorrect ARINC Coding of BCL 2 284 ALL Loss of the BAT1 and BAT2 because 285 ALL of Undervoltage Failure of the Indication of the 288 ALL Battery Voltmeter 1 or 2
 EXTERNAL POWER 24-40-00
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 FAULT ISOLATION PROCEDURES 201 ALL Failure of the External Power 201 001-049, 051-099 Phase Sequence 101-149, 151-199
 201-299, 301-399 Failure of the GPCU (Circuit 203 001-049, 051-099 Breaker Open) 101-149, 151-199
 201-299, 301-399 Failure of the External Power 205 001-049, 051-099 Receptacle 101-149, 151-199
 201-299, 301-399 Failure of the External Ground 207 001-049, 051-099 Power Source 101-149, 151-199
 201-299, 301-399 Failure of the Ground Power 209 001-049, 051-099 Control Unit 101-149, 151-199
 201-299, 301-399 The AVAIL Legend of the ELEC/EXT 211 ALL PWR Pushbutton Switch Stays off when the EXT PWR Energizes the Aircraft The ON legend of the ELEC/EXT 215 001-049, 051-099 Pushbutton Switch Stays off when 101-149, 151-199 the EXT PWR Energizes the Aircraft 201-299, 301-399 The EXT PWR/AVAIL Caution Light 217 001-049, 051-099 Stays off when the EXT PWR 101-149, 151-199 Energizes the Aircraft 201-299, 301-399 The EXT PWR/NOT IN USE Indicator 219 ALL Light Stays off when the EXT PWR Energizes the Aircraft The EXT PWR/AVAIL Caution Light 223 001-049, 051-099 and the AVAIL Legend of the 101-149, 151-199
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 TABLE OF CONTENTS
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 SUBJECT_______ CH/SE/SU _ PAGE EFFECTIVITY________ C ____ ___________ ELEC/EXT PWR Pushbutton Switch 201-299, 301-399 Stay off when the EXT PWR Energizes the Aircraft The AVAIL Legend of the EXT PWR 225 ALL Pushbutton Switch Stays on when the Switch is Pushed External Power not Available 228 ALL although the External Power Energizes the Aircraft
 AC EXTERNAL POWER CONTROL (GPCU OR 24-41-00
 GAPCU) FAULT ISOLATION PROCEDURES 201 ALL Failure of the Ground Power 201 001-049, 051-099 Control Unit 101-149, 151-199 201-299, 301-399 Failure of the Connection between 202 001-049, 051-099 the GPCU and the APU GCU 101-149, 151-199 201-299, 301-399 Failure of the RS422 Electrical 203 001-049, 051-099 Connection between the GPCU and 101-149, 151-199 the APU GCU 201-299, 301-399 Failure of the RS422 Electrical 205 001-049, 051-099 Connection between the GPCU and 101-149, 151-199 the GCU 1 201-299, 301-399 Failure of the RS422 Electrical 207 001-049, 051-099 Connection between the GPCU and 101-149, 151-199 the GCU 2 201-299, 301-399 Failure of the RS422 Electrical 209 001-049, 051-099 Connection between the GPCU and 101-149, 151-199 the GCU 1 201-299, 301-399 Failure of the RS422 Electrical 210 001-049, 051-099 Connection between the GPCU and 101-149, 151-199 the GCU 2 201-299, 301-399 Loss of the CFDIU Discrete Signal 211 001-049, 051-099 to the GPCU 101-149, 151-199 201-299, 301-399 Aircraft Electrical Circuits 212 ALL cannot be supplied from the External Power Failure of the Ground Auxiliary 214 401-499, Power Control Unit Failure of the Interlock Circuit 215 401-499, (External Power / GAPCU) Failure of the External Power 217 401-499, Failure of the Interlock Signal of 220 401-499,
　
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