Loss of the DME Antenna 1 Signals

TASK 34-51-00-810-823-A
Loss of the DME Antenna 1 Signals

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-51-00-740-002	BITE Test of the DME
ASM 345101
AMM 34-51-11-000-002	Removal of the DME Antenna
AMM 34-51-11-400-002	Installation of the DME Antenna
AMM 34-51-33-000-001	Removal of the DME Interrogator
AMM 34-51-33-400-001	Installation of the DME Interrogator

3. Fault Confirmation
Subtask 34-51-00-740-092-A

A. Test
Do the BITE test of the DME (system 1) AMM 34-51-00-740-002.

4. Fault Isolation
Subtask 34-51-00-810-085-A

A. If the test gives the maintenance message DME1 ANTENNA (3SD1):

swap the INTRG-DME, 1 [2SD1] and the DME interrogator 2 AMM 34-51-33-000-001 and AMM 34-51-33-400-001.

(1) If the fault stops:

(2) If the fault continues:

remove the DME interrogator 1
disconnect the coaxial connector from the DME antenna 1 AMM 34-51-11-000-002
do a check of the wiring between the DME interrogator 1 and the DME antenna 1 : for pin AB/C of the DME interrogator 1 ASM 345101.

(a) If the wiring is not OK:

(b) If the wiring is OK:

Subtask 34-51-00-740-093-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:21 UTC