Failure of One of the Two RMPs: The RMP 1

TASK 23-13-00-810-817-A
Failure of One of the Two RMPs: The RMP 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 23-13-00-740-001	BITE Test of the Radio Management
ASM 231301
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)

3. Fault Confirmation
Subtask 23-13-00-865-068-A

A. Table of the circuit breakers used in this procedure:

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

Subtask 23-13-00-860-064-A

B. Job Set-Up
On the RMP 1 and RMP 2 only, make sure that the ON/OFF switches are at ON.

Subtask 23-13-00-740-082-A

C. Test
Do the BITE test of the Radio Management AMM 23-13-00-740-001.

NOTE: Do this test for the RMP 1 and RMP 2.

4. Fault Isolation
Subtask 23-13-00-810-066-B

A. If the tests give the two maintenance messages
RMP1(1RG1)
RMP1(1RG1)/RMP2(1RG2):

(1) If the circuit breaker (2RG1) is closed:

(a) If there is 28VDC:

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

(b) If there is no 28VDC:

1 If there is no ground signal:

repair the wiring between the RMP 1 (1RG1) pin A/R and the ground terminal ASM 231301.

2 If there is a ground signal:

do a check of the wiring between the RMP 1 pin A/N and the circuit breaker (2RG1) ASM 231301.

a If there is no continuity:

b If there is continuity:

(2) If the circuit breaker (2RG1) is open:

(a) If it opens again:

1 If the fault continues:

do a check for a short to ground at the wiring between the RMP 1 (1RG1) pin A/N and the circuit breaker (2RG1) ASM 231301.

a If there is a short to ground:

b If there is no short to ground:

(b) If the circuit breaker stays closed and the fault continues:

Subtask 23-13-00-740-083-A

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

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