Loss of the CFDIU Input Bus on the DME 1

TASK 34-51-00-810-819-A
Loss of the CFDIU Input Bus on the DME 1

1. Possible Causes

INTRG-DME, 1 [2SD1]
wiring of the MAINTENANCE DATA INPUT bus from the DME interrogator 1 (2SD1) to the first terminal block

2. Job Set-up Information
A. Referenced Information

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

3. Fault Confirmation
Subtask 34-51-00-740-078-A

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

4. Fault Isolation
Subtask 34-51-00-810-074-B

A. If the test gives the maintenance message CFDIU(1TW)/DME1(2SD1):

(1) If the fault continues:

do a check and repair the wiring of the MAINTENANCE DATA INPUT bus from the DME interrogator 1 (2SD1) to the first terminal block ASM 345101.

Subtask 34-51-00-740-079-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:20 UTC