Loss of the DME 1 Data Bus Identified by the EIS 3

TASK 34-51-00-810-805-A
Loss of the DME 1 Data Bus Identified by the EIS 3

1. Possible Causes

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

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-740-002	Perform Electronic Instrument System (EIS) Input Test
AMM 31-60-00-740-007	GROUND SCANNING Test of the DMC
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 34-51-00-865-052-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	NAV/DME/1	1SD1	G14

Subtask 34-51-00-740-058-A ** ON A/C NOT FOR ALL

B. Test
(1) Do the EIS input test AMM 31-60-00-740-002.

Subtask 34-51-00-740-058-B ** ON A/C NOT FOR ALL

B. Test
(1) Do the Ground Scanning Test of the DMC AMM 31-60-00-740-007.

4. Fault Isolation
Subtask 34-51-00-810-056-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DMC 3 : NO DME 1 DATA:

(1) If the fault continues:

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

Subtask 34-51-00-810-056-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DMC 3 : DME1(2SD1)/DMC3(1WT3)

(1) If the fault continues:

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

Subtask 34-51-00-740-059-A

B. Do the test given in Para. 3.B.

[Rev.8 from Aug 2018] 2026.04.04 04:33:19 UTC