Loss of the VOR1 Data

TASK 34-55-00-810-830-A
Loss of the VOR1 Data

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-55-00-740-002	BITE Test of the VOR/MKR
ASM 345501
AMM 34-55-31-000-001	Removal of the VOR/MKR Receiver
AMM 34-55-31-400-001	Installation of the VOR/MKR Receiver

3. Fault Confirmation
Subtask 34-55-00-740-082-A

A. Test
Do the BITE test of the VOR/MARKER (system 1) AMM 34-55-00-740-002.

4. Fault Isolation
Subtask 34-55-00-810-087-A

A. If the test gives the maintenance message DMC1/2 (1WT1/2)/DDRMI (1FN)/VOR1 (3RS1):

swap the RECEIVER-VOR/MKR, 1 [3RS1] and the VOR/MKR receiver 2 AMM 34-55-31-000-001 and AMM 34-55-31-400-001.

(1) If the fault stops:

(2) If the fault continues:

remove the VOR/MKR receiver 1
do a check and repair the wiring between the VOR/MKR receiver 1 and the first terminal block: for pins AB/13B, 13C ASM 345501
install the VOR/MKR receiver 1.

Subtask 34-55-00-740-083-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:32 UTC