_

 - replace the C/B-NAV/ATC/1 (5SH1). 3 Install these two units:

_
 - XPDR-ATC/MODE S, 1 (Ref. AMM TASK 34-52-33-400-001)

 - CTL UNIT-ATC/TCAS (3SH) (Ref. AMM TASK 34-52-12-400-001).

 D. 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 ∞∞34-52-00∞∞∞∞∞∞∞∞∞∞Page 206
 Feb 01/99R
 CES  Loss of the ATC Bottom Antenna 1 Signals

 1. Possible Causes
_______________
 - XPDR-ATC/MODE S, 1 (1SH1)

 - ANTENNA-ATC BOTTOM, 1 (7SH1)

 - wiring from the ATC/MODE S transponder 1 (1SH1) to the ATC bottom antenna 1 (7SH1)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 34-52-00-740-004 BITE Test of the ATC
 AMM 34-52-11-000-001 Removal of the ATC Antenna (7SH1,7SH2,7SH3,7SH4)
 AMM 34-52-11-400-001 Installation of the ATC Antenna (7SH1,7SH2,7SH3,7SH4)
 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
_______________
R **ON A/C 001-049, 101-105, 151-199,
 A. If the BITE test gives the maintenance message ATC1: ANTENNA B:
 - 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 of the wiring from the ATC/MODE S transponder 1 (1SH1) to the ATC bottom antenna 1 (7SH1) (Ref. ASM 34-52/01).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - replace the ANTENNA-ATC BOTTOM, 1 (7SH1) (Ref. AMM TASK 34-52-11-000-001) and (Ref. AMM TASK 34-52-11-400-001).
 「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 ∞∞34-52-00∞∞∞∞∞∞∞∞∞∞Page 207
 May 01/05 CESR **ON A/C 051-099, 106-149, 201-299, 301-399, 401-499,

 A. If the BITE test gives the maintenance message ATC1 BOT ANTENNA (7SH1) :
 - 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 of the wiring from the ATC/MODE S transponder 1 (1SH1) to the ATC bottom antenna 1 (7SH1) (Ref. ASM 34-52/01).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - replace the ANTENNA-ATC BOTTOM, 1 (7SH1) (Ref. AMM TASK 34-52-11-000-001) and (Ref. AMM TASK 34-52-11-400-001).
 **ON A/C ALL
 B. Do the test given in Para. 3.

 Loss of the ATC Top Antenna 1 Signals
 1. Possible Causes
_______________
 - XPDR-ATC/MODE S, 1 (1SH1)

 - ANTENNA-ATC TOP, 1 (7SH3)

 - wiring from the ATC/MODE S transponder 1 (1SH1) to the ATC top antenna 1 (7SH3)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 34-52-00-740-004 BITE Test of the ATC
 AMM 34-52-11-000-001 Removal of the ATC Antenna (7SH1,7SH2,7SH3,7SH4)
 AMM 34-52-11-400-001 Installation of the ATC Antenna (7SH1,7SH2,7SH3,7SH4)
 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
_______________
R **ON A/C 001-049, 101-105, 151-199,
 A. If the BITE test gives the maintenance message ATC1: ANTENNA T:
 - 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).
　
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