Reset of the Multi-Mode Receiver (MMR)

TASK 34-36-00-860-801-A
Reset of the Multi-Mode Receiver (MMR)

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 34-36-00-860-144-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 34-36-00-865-117-A

B. 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
121VU	COM NAV/MMR/2	42RT2	K09
** ON A/C NOT FOR ALL
121VU	COM NAV/MMR/2	42RT2	L07

4. Procedure
Subtask 34-36-00-860-145-A

A. Reset of the MMR1 (MMR2).

ACTION	RESULT
1.On panel 49VU (121VU):	On the upper ECAM DU:
Pull circuit breaker 42RT1 (42RT2) and wait approximately for 10 seconds.	The NAV LS 1(2) FAULT or NAV ILS 1(2) FAULT and NAV GPS 1(2) FAULT messages come into view.
2.On panel 49VU (121VU):	On the upper ECAM DU:
Push circuit breaker 42RT1 (42RT2) and wait approximately for 5 seconds.	The NAV LS 1(2) FAULT or NAV ILS 1(2) FAULT and NAV GPS 1(2) FAULT messages go out of view.

5. Close-up
Subtask 34-36-00-860-146-A

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002)

[Rev.10 from 2021] 2026.04.02 06:23:16 UTC