R  TASK 31-32-00-810-843 
R  Loss of the Bus Output from the GPWC to the CFDIU 
R  1. Possible Causes_______________ 
R  - CFDIU (1TW) 
R  - GPWC (1WZ) 
R  - wiring from the CFDIU (1TW) to the GPWC (1WZ) 
R  2. Job Set-up Information______________________ 
R  A. Referenced Information 
R  -------------------------------------------------------------------------------
R  REFERENCE DESIGNATION 
R  -------------------------------------------------------------------------------
R  AMM 31-32-00-869-002 Procedure for Class 3 Faults Reading 
R  AMM 31-32-34-000-001 Removal of the CFDIU (1TW) 
R  AMM 31-32-34-400-001 Installation of the CFDIU (1TW) 
R  AMM 34-48-34-000-001 Removal of the GPWC (1WZ) 
R  AMM 34-48-34-400-001 Installation of the GPWC (1WZ) 
R  ASM 31-32/05 
R  3. Fault Confirmation__________________ 
R  A. Make sure that this(these) circuit breaker(s) is(are) closed: 
R  -------------------------------------------------------------------------------
R  PANEL DESIGNATION IDENT. LOCATION 
R  -------------------------------------------------------------------------------
R  121VU EIS/GPWS/115VAC 3WZ P07 
R  121VU EIS/GPWS/28VDC 2WZ P06 
R  B. Test 
R  On the CFDS MENU page, get access to the AVIONICS STATUS page (Ref. AMM 
R  TASK 31-32-00-869-002).

R  4. Fault Isolation_______________ 
R  A. If the test gives the maintenance message NO GPWC DATA: 
R  - replace the CFDIU (1TW), (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM 
R  TASK 31-32-34-400-001). 
R  (1) If the fault continues: 
R  - replace the GPWC (1WZ), (Ref. AMM TASK 34-48-34-000-001) and (Ref. 
R  AMM TASK 34-48-34-400-001). 
R  (a) If the fault continues: 
R  - do a check and repair the wiring from the CFDIU (1TW) to the 
R  GPWC (1WZ) from pins AB/10H, 10J to pins AB/1C, 1D , (Ref. ASM 
R  31-32/05). 
R  B. Do the test given in Para. 3.B.

 Loss of the Bus Output from the TCAS Computer to the CFDIU
 1. Possible Causes
_______________
 - CFDIU (1TW)

 - CMPTR-TCAS (1SG)

 - wiring from the CFDIU (1TW) to the TCAS computer (1SG)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-32-00-869-002 Procedure for Class 3 Faults Reading
 AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
 AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
 AMM 34-43-34-000-001 Removal of the TCAS Computer (1SG)
 AMM 34-43-34-400-001 Installation of the TCAS Computer (1SG)
 ASM 31-32/05

 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 121VU COM NAV/TCAS 4SG K10
R **ON A/C ALL
 B. Test On the CFDS MENU page, get access to the AVIONICS STATUS page (Ref. AMM TASK 31-32-00-869-002).

 4. Fault Isolation
_______________

 A. If the test gives the maintenance message: NO TCAS DATA:
 - replace the CFDIU (1TW), (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
 (1) If the fault continues:
 - replace the CMPTR-TCAS (1SG), (Ref. AMM TASK 34-43-34-000-001) and (Ref. AMM TASK 34-43-34-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring from the CFDIU (1TW) to the TCAS computer (1SG) from pins AA/4H, 4J to pins AF/6E, 6F , (Ref. ASM 31-32/05).
 B. Do the test given in Para. 3.B.
 「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 ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page 252
　
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