Failure of the AC BUS 1 with the GEN 2 in Operation
 1. Possible Causes
_______________
 - BTC-1 (11XU1)

 - GCU-1 (1XU1)

 - RELAY-EPC AUX CTL (5XG)

 - RELAY-GLC 1 AUX CTL (4XU1)

 - GLC-1 (9XU1)

 - RELAY-BUS TIE (30XU1)

 - BTC-2 (11XU2)

 - GCU-2 (1XU2)

 - RELAY-GLC 2 AUX CTL (4XU2)

 - GLC-2 (9XU2)

 - RELAY-SMOKE (30XU2)

 - wiring

 - C/B-ELEC/GEN1/OFF/BTC1 SPLY (5XU)

 - C/B-ELEC/GEN2/OFF/BTC2 SPLY (8XU)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 24-22-34-000-001 Removal of the GCU-1(2) (1XU1, 1XU2)
 AMM 24-22-34-400-001 Installation of the GCU-1(2) (1XU1, 1XU2)
 AMM 24-22-55-000-001 Removal of the Contactors (9XU1, 9XU2, 11XU1, 11XU2)
 AMM 24-22-55-400-002 Installation of the Contactors (9XU1, 9XU2, 11XU1,

 11XU2) AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
 from the External Power
 AMM 31-60-00-860-001 EIS Start Procedure
 AMM 31-60-00-860-002 EIS Stop Procedure
 AMM 71-00-00-710-003 Engine Automatic Start
 AMM 71-00-00-710-028 Engine Shutdown
 ASM 24-22/02
 ASM 24-22/03
 ASM 24-23/02

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞24-50-00∞∞∞∞∞∞∞∞∞∞Page 247
 Feb 01/04R CES

 3. Fault Confirmation
__________________
 A. Job Set-up
 (1) Aircraft Maintenance Configuration
 (a) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

 (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).

 (c) Start the engine 2 (Ref. AMM TASK 71-00-00-710-003).

 B. Test
 (1) Do this test:
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the ELEC panel 35VU:  On the ELEC panel 35VU:
 - release the GEN 1 pushbutton  - the OFF legend of the GEN 1 switch (3XU1). pushbutton switch (3XU1) comes on.
 On the upper ECAM display unit:
 - the ELEC AC BUS 1 FAULT warning comes into view.
 4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 A. If the test confirms the fault:
 - do a check of the status of the ELEC/GEN1/OFF/BTC1 SPLY circuit breaker (5XU).
 (1) If the circuit breaker is closed:
 - replace the BTC-1 (11XU1) (Ref. AMM TASK 24-22-55-000-001) and (Ref. AMM TASK 24-22-55-400-002).
 (a) If the fault continues:
 - do a check and repair the wiring between the pin B/5 of the BTC1 (11XU1) and the pin AA/9C of the GCU1 (1XU1) (Ref. ASM 24-22/02).
 1 If the fault continues:
_
 - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) and (Ref. AMM TASK 24-22-34-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞24-50-00∞∞∞∞∞∞∞∞∞∞Page 248
 Aug 01/05 CES (b) If the fault continues:

 - do a check for 28VDC.
 1 If there is no 28VDC at the pin A/D2 of the EPC auxiliary
_
 control relay (5XG):

 - replace the RELAY-EPC AUX CTL (5XG).
 a If the fault continues:
_
 - repair the wiring between the ELEC/GEN1/OFF/BTC1 SPLY circuit breaker (5XU) and the pin A/D3 of the EPC auxiliary control relay (5XG) (Ref. ASM 24-22/02) and (Ref. ASM 24-23/02).
 2 If there is no 28VDC at the pin A/A2 of the GLC1 auxiliary
_
 control relay (4XU1):

 - replace the RELAY-GLC 1 AUX CTL (4XU1).
 a If the fault continues:
_
 - repair the wiring between the pin A/D2 of the EPC auxiliary control relay (5XG) and the pin A/A3 of the GLC1 auxiliary control relay (4XU1) (Ref. ASM 24-23/02) and (Ref. ASM 24-22/02).
 3 If there is no 28VDC at the pin B/22 of the GLC1 (9XU1):
_
 - replace the GLC-1 (9XU1) (Ref. AMM TASK 24-22-55-000-001) and (Ref. AMM TASK 24-22-55-400-002).
　
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