Loss of the ILS RECEIVER 1 OUTPUT PORT 2 Bus Identified by the EIS (DMC3)

TASK 34-36-00-810-806-A
Loss of the ILS RECEIVER 1 OUTPUT PORT 2 Bus Identified by the EIS (DMC3)

1. Possible Causes

MMR-1 [40RT1]
wiring of the ILS RECEIVER OUT PORT 2 bus from the MMR receiver 1 (40RT1) 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 343601
AMM 34-36-31-000-001	Removal of the ILS Receiver
AMM 34-36-31-400-001	Installation of the ILS Receiver

3. Fault Confirmation
Subtask 34-36-00-865-053-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	NAV/MMR/1	42RT1	G12
** ON A/C NOT FOR ALL
49VU	NAV/ILS/1	1RT1	G12

Subtask 34-36-00-740-060-A ** ON A/C NOT FOR ALL

B. Test
(1) Do the EIS input test (system 3) AMM 31-60-00-740-002.

Subtask 34-36-00-740-060-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 34-36-00-810-057-B ** ON A/C NOT FOR ALL

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

(1) If the fault continues:

do a check and repair the wiring of the ILS RECEIVER OUT PORT 2 bus from the MMR receiver 1 (40RT1) to the first terminal block ASM 343601.

Subtask 34-36-00-810-057-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message MMR1(40RT1)/DMC3(1WT3):

(1) If the fault continues:

do a check and repair the wiring of the ILS RECEIVER OUT PORT 2 bus from the MMR receiver 1 (40RT1) to the first terminal block ASM 343601.

Subtask 34-36-00-740-061-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:32:57 UTC