R Loss of the RA1 and RA2 Data to the TCAS
 1. Possible Causes
_______________
 - CMPTR-TCAS (1SG)

 - XCVR-RA, 1 (2SA1)

 - XCVR-RA, 2 (2SA2)

 - wiring of the RADIO ALTITUDE 1 bus from the TCAS computer (1SG) to the radio altimeter transceiver 1 (2SA1)

 - wiring of the RADIO ALTITUDE 2 bus from the TCAS computer (1SG) to the radio altimeter transceiver 2 (2SA2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 34-42-00-740-002 BITE Test of the Radio Altimeter AMM 34-42-33-000-001 Removal of the Radio Altimeter Transceiver 2SA1 and 2SA2 AMM 34-42-33-400-001 Installation of the Radio Altimeter Transceiver 2SA1
 and 2SA2
 AMM 34-43-00-740-001 BITE Test of the TCAS
 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 34-43/01

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the TCAS (Ref. AMM TASK 34-43-00-740-001).
 4. Fault Isolation
_______________
 **ON A/C 001-049, 051-099, 101-105, 151-199,
 A. If the test gives the maintenance messages RA1(1SA1)/TCAS(1SG) and RA2(1SA2)/TCAS(1SG):
 - do the BITE test of the radio altimeter (Ref. AMM TASK 34-42-00-740-002).
 (1) If the test gives a maintenance message:
 - Do the trouble shooting procedure related to the maintenance message.
 「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 ∞∞34-43-00∞∞∞∞∞∞∞∞∞∞Page 235
 Aug 01/05 CES (2) If the test does not give a maintenance message:

 - 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:
 - replace the XCVR-RA, 1 (2SA1) and the XCVR-RA, 2 (2SA2) (Ref. AMM TASK 34-42-33-000-001) and (Ref. AMM TASK 34-42-33-400-001).
 1 If the fault continues:
_
 - do a check and repair the wiring of the RADIO ALTITUDE 1 bus from the TCAS computer (1SG) to the radio altimeter transceiver 1 (2SA1)

 - do a check and repair the wiring of the RADIO ALTITUDE 2 bus from the TCAS computer (1SG) to the radio altimeter transceiver 2 (2SA2) (Ref. ASM 34-43/01).

R **ON A/C 106-149, 201-299, 301-399, 401-499,
 A. If the test gives the maintenance message RA1(1SA1) + RA2(1SA2)/TCAS (1SG):
 - do the BITE test of the radio altimeter (Ref. AMM TASK 34-42-00-740-002).
 (1) If the test gives a maintenance message:

 - Do the trouble shooting procedure related to the maintenance message.

 (2) If the test does not give a maintenance message:

 - 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:
 - replace the XCVR-RA, 1 (2SA1) and the XCVR-RA, 2 (2SA2) (Ref. AMM TASK 34-42-33-000-001) and (Ref. AMM TASK 34-42-33-400-001).
 1 If the fault continues:
_
 - do a check and repair the wiring of the RADIO ALTITUDE 1 bus from the TCAS computer (1SG) to the radio altimeter transceiver 1 (2SA1)

 - do a check and repair the wiring of the RADIO ALTITUDE 2 bus from the TCAS computer (1SG) to the radio altimeter transceiver 2 (2SA2) (Ref. ASM 34-43/01).

 **ON A/C ALL
 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-43-00∞∞∞∞∞∞∞∞∞∞Page 236
 Aug 01/05 CES

 TASK 34-43-00-810-820 
R  Loss of the ATC1 Data to the TCAS
 1. Possible Causes_______________
 - CMPTR-TCAS (1SG) - wiring of the XT COORD-1 bus from the TCAS computer (1SG) to the ATC/MODE S transponder 1 (1SH1)
 2. Job Set-up Information______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM AMM AMM ASM  34-43-00-740-001 34-43-34-000-001 34-43-34-400-001 34-43/01 BITE Test of the TCASRemoval of the TCAS Computer (1SG)Installation of the TCAS Computer (1SG)
 3. Fault Confirmation__________________
　
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