Loss of the MLS Landing Antenna 2 Signal

TASK 34-36-00-810-881-A
Loss of the MLS Landing Antenna 2 Signal

1. Possible Causes

MMR-2 [40RT2]
coaxial cable between the MMR2 and the MLS landing antenna 2

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 343600
AMM 34-36-00-740-003	BITE Test of the MMR
AMM 34-36-31-000-001	Removal of the ILS Receiver
AMM 34-36-31-000-002
AMM 34-36-31-400-001	Installation of the ILS Receiver
AMM 34-36-31-400-002

3. Fault Confirmation
Subtask 34-36-00-740-174-A

A. Test

Do the BITE test of the receiver MMR2 AMM 34-36-00-740-003.

4. Fault Isolation
Subtask 34-36-00-810-150-B

A. If the test gives the maintenance message from the MMR2
MLS LANDING ANT2 (57RT2)/ COAX CABLE MMR2 (4ORT2):
(1) Replace the MMR-2 [40RT2] AMM 34-36-31-000-001 and AMM 34-36-31-400-001.
(a) If the fault continues:

remove the MMR2 AMM 34-36-31-000-002
disconnect the coaxial cable from the MLS landing antenna 2
make sure that there is continuity on the coaxial cable between the MMR2 and the MLS landing antenna 2 ASM 343600
replace the coaxial cable if necessary
make sure that there is discontinuity between the core and the shield of the coaxial cable of the MLS landing antenna 2
repair if necessary
install the MMR2 AMM 34-36-31-400-002
connect the coaxial cable to the MLS landing antenna 2
disconnect the coaxial cable from the MLS Landing Antenna 2
make sure that there is continuity on the coaxial cable of the MLS Landing Antenna 2 ASM 343600
replace the coaxial cable if necessary
make sure that there is discontinuity between the core and the shied of the coaxial cable of the MLS Landing Antenna 2
repair it if necessary
Install the receiver MMR2 AMM 34-36-31-400-002
connect the coaxial cable of the MLS Landing Antenna 2.

5. Close-up
Subtask 34-36-00-740-175-A

A. Do the test given in para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:03 UTC