Access to RAD/NAV Page on the MCDU 1#amp#2 Inoperative

TASK 22-82-00-810-827-A
Access to RAD/NAV Page on the MCDU 1&2 Inoperative

1. Possible Causes

RMP-COM/NAV FREQ SEL, 1 [1RG1]
RMP-COM/NAV FREQ SEL, 2 [1RG2]
wiring of the NAV OPERATION DIS OUTPUT discretes (from the RMP 1 (1RG1) to the first terminal block and from the RMP 2 (1RG2) to the first terminal block)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 228504
AMM 23-13-13-000-001	Removal of the Radio Management Panel (RMP)
AMM 23-13-13-400-001	Installation of the Radio Management Panel (RMP)
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002	De-energize the Aircraft Electrical Circuits Supplied from the External Power

3. Fault Confirmation
Subtask 22-82-00-860-074-A

A. Job Set-up
(1) Aircraft Maintenance Configuration
(a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.

Subtask 22-82-00-865-063-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AUTO FLT/FMGC/1	10CA1	B02
49VU	AUTO FLT/MCDU/1	11CA1	B01
49VU	COM/RMP/1	2RG1	G10
121VU	COM NAV/RMP/2	2RG2	L02
121VU	AUTO FLT/FMGC/2	10CA2	M17
121VU	AUTO FLT/MCDU/2	11CA2	N20

Subtask 22-82-00-710-101-A

C. Test

ACTION	RESULT
1.On the center pedestal, on the each MCDU (1 and 2):
turn the BRT knob to make the light more or less bright
push the RAD/NAV mode key.	the RAD/NAV page comes into view respectively.

4. Fault Isolation
Subtask 22-82-00-810-084-A

A. If the RAD/NAV page does not come into view:

replace the RMP-COM/NAV FREQ SEL, 1 [1RG1] AMM 23-13-13-000-001 and AMM 23-13-13-400-001.

(1) If the fault continues:

replace the RMP-COM/NAV FREQ SEL, 2 [1RG2] AMM 23-13-13-000-001 and AMM 23-13-13-400-001.

(a) If fault continues:

do a check and repair the wiring of the NAV OPERATION DIS OUTPUT discretes (from the RMP 1 (1RG1) to the first terminal block and from the RMP 2 (1RG2) to the first terminal block) ASM 228504.

Subtask 22-82-00-710-102-A

B. Do the test given in Para. 3.

5. Close-up
Subtask 22-82-00-860-075-A

A. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

[Rev.8 from Aug 2018] 2026.04.04 04:25:28 UTC