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 A. If the test gives the maintenance message DMC1 : NO ECU 1A DATA:
 - replace the ECU (4000KS), (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 (1) If the fault continues:
 - do a check and repair the aircraft wiring of the output 1 bus on channel A from the ECU (4000KS) to the first terminal block (Ref. ASM 73-25/10).
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 A. If the test gives the maintenance message ECU(E1-4000KS)BUS
 ECU1A/DMC1(1WT1) :

 - replace the ECU (4000KS), (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 (1) If the fault continues:
 - do a check and repair the aircraft wiring of the output 1 bus on channel A from the ECU (4000KS) to the first terminal block (Ref. ASM 73-25/10).
 **ON A/C ALL
 B. Do the test given in Para. 3.
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 TASK 73-29-00-810-823
 Loss of the Output 1 Bus of the ECU 1 Channel A
 1. Possible Causes
_______________
 - ECU (4000KS)

 - aircraft wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-60-00-740-002 EIS Input Test AMM 31-60-00-740-007 GROUND SCANNING Test of the DMC AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit
 (ECU)(4000KS)
 ASM 73-25/10

 3. Fault Confirmation
__________________
 **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
 A. Do the EIS input test (Ref. AMM TASK 31-60-00-740-002).
R **ON A/C 106-149, 303-399, 401-499,
 A. Do the Ground Scanning Test of the DMC (Ref. AMM TASK 31-60-00-740-007).
 **ON A/C ALL
 4. Fault Isolation
_______________
 **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
 A. If the test gives the maintenance message DMC3 : NO ECU 1A DATA:
 - replace the ECU (4000KS), (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 (1) If the fault continues:
 - do a check and repair the aircraft wiring of the output 1 bus on channel A from the ECU (4000KS) to the first terminal block (Ref. ASM 73-25/10).
 F 『 EEFF : ALL E ∞∞73-29-00∞∞∞∞∞∞∞∞∞∞Page 243
 E E Aug 01/05 E E ECES
ER **ON A/C 106-149, 303-399, 401-499,

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 E  C F M  E
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 E  56  E
 E  E 

 A. If the test gives the maintenance message ECU(E1-4000KS)BUS
 ECU1A/DMC3(1WT3) :

 - replace the ECU (4000KS), (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 (1) If the fault continues:
 - do a check and repair the aircraft wiring of the output 1 bus on channel A from the ECU (4000KS) to the first terminal block (Ref. ASM 73-25/10).
 **ON A/C ALL
 B. Do the test given in Para. 3.
 F 『 EEFF : ALL E ∞∞73-29-00∞∞∞∞∞∞∞∞∞∞Page 244
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E TASK 73-29-00-810-824 Loss of the Output 1 Bus of the ECU 1 Channel A

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 1. Possible Causes
_______________
 - ECU (4000KS)

 - aircraft wiring

 2. Job Set-up Information
______________________
 A. Referenced Information

 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-50-00-710-001 Ground Scanning of the Central Warning System AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit
　
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