(1SH1,1SH2)
 ASM 34-52/01

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the ATC (Ref. AMM TASK 34-52-00-740-004).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message LGCIU2 (5GA2)/ATC1 (1SH1):
 (1) If the maintenance message LGCIU2 (5GA2)/ATC2(1SH2) is also shown:
 - replace the LGCIU-2 (5GA2) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 (a) If the fault continues:
 - replace the CTL UNIT-ATC/TCAS (3SH) (Ref. AMM TASK 34-52-12-000-001) and (Ref. AMM TASK 34-52-12-400-001).
 1 If the fault continues:
_
 - do a check and repair the wiring between the LGCIU2 and the ATC/TCAS control unit (Ref. ASM 34-52/01).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, 106-149, 201-299, 301-399, ∞∞34-52-00∞∞∞∞∞∞∞∞∞∞Page 242
 401-499, Aug 01/05 CES

 (2) If the maintenance message LGCIU2 (5GA2)/ATC2 (1SH2) is not shown:
 - replace the CTL UNIT-ATC/TCAS (3SH) (Ref. AMM TASK 34-52-12-000-001) and (Ref. AMM TASK 34-52-12-400-001).
 (a) If the fault continues:
 - replace the XPDR-ATC/MODE S, 1 (1SH1) (Ref. AMM TASK 34-52-33-000-001) and (Ref. AMM TASK 34-52-33-400-001).
 1 If the fault continues:
_
 - do a check and repair the wiring between the ATC/TCAS control unit and the ATC/Mode S transponder 1 for the Air/Ground Logic Input 2 discrete signal (Ref. ASM 34-52/01).
 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, 106-149, 201-299, 301-399, ∞∞34-52-00∞∞∞∞∞∞∞∞∞∞Page 243
 401-499, Aug 01/05 CES

 Loss of the LGCIU1 Data Input to the ATC/Mode S Transponder 2
 1. Possible Causes
_______________
 - LGCIU-1 (5GA1)

 - CTL UNIT-ATC/TCAS (3SH)

 - XPDR-ATC/MODE S, 2 (1SH2)

 - wiring between the LGCIU1 and the ATC/TCAS control unit

 - wiring between the ATC/TCAS control unit and the ATC/Mode S transponder 2

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
 AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
 AMM 34-52-00-740-004 BITE Test of the ATC
 AMM 34-52-12-000-001 Removal of the ATC/TCAS Control Unit (3SH)
 AMM 34-52-12-400-001 Installation of the ATC/TCAS Control Unit (3SH)
 AMM 34-52-33-000-001 Removal of the ATC/Mode S Transponder (1SH1, 1SH2)
 AMM 34-52-33-400-001 Installation of the ATC/Mode S Transponder

 (1SH1,1SH2)
 ASM 34-52/01

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the ATC (Ref. AMM TASK 34-52-00-740-004).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message LGCIU1 (5GA1)/ATC2 (1SH2)
 (1) If the maintenance message LGCIU1 (5GA1)/ATC1(1SH1) is also shown:
 - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 (a) If the fault continues:
 - replace the CTL UNIT-ATC/TCAS (3SH) (Ref. AMM TASK 34-52-12-000-001) and (Ref. AMM TASK 34-52-12-400-001).
 1 If the fault continues:
_
 - do a check and repair the wiring between the LGCIU1 and the ATC/TCAS control unit (Ref. ASM 34-52/01).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, 106-149, 201-299, 301-399, ∞∞34-52-00∞∞∞∞∞∞∞∞∞∞Page 244
 401-499, Aug 01/05 CES

 (2) If the maintenance message LGCIU1 (5GA2)/ATC1 (1SH1) is not shown:
 - replace the CTL UNIT-ATC/TCAS (3SH) (Ref. AMM TASK 34-52-12-000-001) and (Ref. AMM TASK 34-52-12-400-001).
 (a) If the fault continues:
 - replace the XPDR-ATC/MODE S, 2 (1SH2) (Ref. AMM TASK 34-52-33-000-001) and (Ref. AMM TASK 34-52-33-400-001).
 1 If the fault continues:
_
　
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