Loss of the CFDIU Input Bus on the VOR 1

TASK 34-55-00-810-819-A
Loss of the CFDIU Input Bus on the VOR 1

1. Possible Causes

RECEIVER-VOR/MKR, 1 [3RS1]
wiring of the MAINTENANCE DATA INPUT bus from the VOR/MKR receiver 1 (3RS1) to the first terminal block

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 34-55-00-740-070-A

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

4. Fault Isolation
Subtask 34-55-00-810-078-B

A. If the test gives the maintenance message CFDIU(1TW)/VOR1(3RS1):

(1) If the fault continues:

do a check and repair the wiring of the MAINTENANCE DATA INPUT bus from the VOR/MKR receiver 1 (3RS1) to the first terminal block ASM 345501.

Subtask 34-55-00-740-071-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:31 UTC