Loss of the ILS Localizer Antenna Signal
1. Possible Causes
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- RECEIVER-ILS, 1 (2RT1)
- RECEIVER-ILS, 2 (2RT2)
- ANTENNA-LOCALIZER 1/2 (3RT)
2. Job Set-up Information
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A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-36-00-740-002 BITE Test of the ILS
AMM 34-36-11-000-001 Removal of the Localizer Antenna (3RT)
AMM 34-36-11-400-001 Installation of the Localizer Antenna (3RT)
AMM 34-36-31-000-001 Removal of the ILS Receiver (2RT1,2RT2)
AMM 34-36-31-400-001 Installation of the ILS Receiver (2RT1,2RT2)
ASM 34-36/01
3. Fault Confirmation
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A. Test Do the BITE test of the ILS (systems 1 and 2) (Ref. AMM TASK 34-36-00-740-002).
4. Fault Isolation
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A. If the test of the ILS1 only gives the maintenance message ILS LOCALIZER ANTENNA (3RT):
- swap the RECEIVER-ILS, 1 (2RT1) and the RECEIVER-ILS, 2 (2RT2) (Ref. AMM TASK 34-36-31-000-001) (Ref. AMM TASK 34-36-31-400-001)
- do the BITE test of the ILS (system 1) (Ref. AMM TASK 34-36-00-740-002).
(1) If the test of the ILS1 gives the maintenance message ILS LOCALIZER ANTENNA (3RT):
- remove the ILS receiver 1
- remove the ANTENNA-LOCALIZER 1/2 (3RT) (Ref. AMM TASK 34-36-11-000-001)
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-004, ∞∞34-36-00∞∞∞∞∞∞∞∞∞∞Page 274
May 01/05 CES
- make sure that there is continuity on the coaxial cable between the ILS receiver 1 and the localizer 1/2 antenna (3RT) (Ref. ASM 34-36/01)
- replace the coaxial cable if necessary
- make sure that there is discontinuity between the core and the shield of the coaxial cable
- repair if necessary
- install the ILS receiver 1
- install the localizer 1/2 antenna (3RT) (Ref. AMM TASK 34-36-11-400-001).
(2) If the test of the ILS1 does not give the maintenance message ILS LOCALIZER ANTENNA (3RT):
- replace the ILS receiver that you installed on side 2.
B. If the test of the ILS2 only gives the maintenance message ILS LOCALIZER ANTENNA (3RT):
- swap the ILS receiver 1 (2RT1) and the ILS receiver 2 (2RT2) (Ref. AMM TASK 34-36-31-000-001) (Ref. AMM TASK 34-36-31-400-001)
- do the BITE test of the ILS (system 2) (Ref. AMM TASK 34-36-00-740-002).
(1) If the test of the ILS2 gives the maintenance message ILS LOCALIZER ANTENNA (3RT):
- remove the ILS receiver 2
- remove the localizer 1/2 antenna (3RT) (Ref. AMM TASK 34-36-11-000-001)
- make sure that there is continuity on the coaxial cable between the ILS receiver 2 and the localizer 1/2 antenna (3RT) (Ref. ASM 34-36/01)
- replace the coaxial cable if necessary
- make sure that there is discontinuity between the core and the shield of the coaxial cable
- repair if necessary
- install the ILS receiver 2
- install the localizer 1/2 antenna (3RT) (Ref. AMM TASK 34-36-11-400-001).
(2) If the test of the ILS2 does not give the maintenance message ILS LOCALIZER ANTENNA (3RT):
- replace the ILS receiver that you installed on side 1.
C. If the test of the ILS1 and the test of the ILS2 give the maintenance message ILS LOCALIZER ANTENNA (3RT):
- replace the localizer 1/2 antenna (3RT) (Ref. AMM TASK 34-36-11-000-001) (Ref. AMM TASK 34-36-11-400-001).
D. 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 : 001-004, ∞∞34-36-00∞∞∞∞∞∞∞∞∞∞Page 275
May 01/05 CES Loss of the ILS Glide/Slope Antenna Signal
1. Possible Causes
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- RECEIVER-ILS, 1 (2RT1)
- RECEIVER-ILS, 2 (2RT2)
- ANTENNA-GLIDE/SLOPE 1/2 (4RT)
2. Job Set-up Information
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