Loss of the CFDIU INPUT Bus on the MMR1

TASK 34-36-00-810-850-A
Loss of the CFDIU INPUT Bus on the MMR1

1. Possible Causes

MMR-1 [40RT1]
wiring of the CFDS DATA INPUT bus between the MMR1 (40RT1) and the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-36-00-740-003	BITE Test of the MMR
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 34-36-00-740-116-A

A. Test
Do the BITE test of the MMR1 AMM 34-36-00-740-003.

4. Fault Isolation
Subtask 34-36-00-810-114-A

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

(1) If the fault continues:

do a check and repair the wiring of the CFDS DATA INPUT bus between the MMR1 (40RT1) and the first terminal block for pins AB/1E, 1F of the MMR1 ASM 343601.

Subtask 34-36-00-740-117-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:01 UTC