Loss of the RMP 1 Data on the Bus 2 (CFDIU Source)

TASK 23-13-00-810-846-A
Loss of the RMP 1 Data on the Bus 2 (CFDIU Source)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 231302
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 31-32-00-869-002	Procedure for the Class 3 Fault Reading

3. Fault Confirmation
Subtask 23-13-00-865-062-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	COM/RMP/1	2RG1	G10

Subtask 23-13-00-860-084-A

B. Job Set-up
On the RMP 1 only, make sure that the ON/OFF switch is at ON.

Subtask 23-13-00-740-118-A

C. Test
On the CFDS MENU page, get access to the AVIONICS STATUS page AMM 31-32-00-869-002.

4. Fault Isolation
Subtask 23-13-00-810-087-A

A. If the test gives the maintenance message NO RMP 1 DATA:

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:

do a check and repair the wiring of the COM 1 DATA OUTPUT signal, (from RMP 1 (1RG1) pins A/<P, <Q to the first terminal block) ASM 231302.

Subtask 23-13-00-740-119-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:25:40 UTC