DMU Receives No Data from the SFCC 1 or SFCC 2

TASK 31-36-00-810-833-A
DMU Receives No Data from the SFCC 1 or SFCC 2

1. Possible Causes

wiring
SLAT/FLAP CONTR.COMP. [21CV]
SLAT/FLAP CONTR.COMP. [22CV]
DMU [1TV]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 27-54-00-710-001	Operational Test of the Flap System
AMM 31-36-00-710-001	Test of the DMU
AMM 31-36-34-000-001	Removal of the Data Management Unit (DMU)
AMM 31-36-34-400-001	Installation of the Data Management Unit (DMU)
ASM 313701

3. Fault Confirmation
Subtask 31-36-00-740-092-A ** ON A/C NOT FOR ALL

A. Do the DMU (1TV) fault monitoring test AMM 31-36-00-710-001.

NOTE: Make sure that the circuit breakers 1TV, 7CV, 8CV, 11CV, 12CV, 2CN on the panel 121VU and 1CN, 5CV, 6CV on the panel 49VU and 9CV, 10CV on the panel 122VU are closed during the test.

4. Fault Isolation
Subtask 31-36-00-810-073-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message:

NO SFCC 1 DATA, or
NO SFCC 2 DATA

(1) Do the operational test of the Slat and Flap Control Computer AMM 27-54-00-710-001.

(a) If the test gives a different maintenance message, you can find the related trouble shooting procedure in the applicable Page Block 201.

(2) If the fault continues:

do a check and repair the wiring from the SLAT/FLAP CONTR.COMP. [21CV] or SLAT/FLAP CONTR.COMP. [22CV] to the DMU [1TV] ASM 313701:

SFCC 1 Connector AB/4E to DMU Connector AA/3A
SFCC 1 Connector AB/4F to DMU Connector AA/3B
SFCC 2 Connector AB/4E to DMU Connector AB/3A
SFCC 2 Connector AB/4F to DMU Connector AB/3B

(3) If the fault continues:

replace the DMU (1TV) AMM 31-36-34-000-001 and AMM 31-36-34-400-001.

Subtask 31-36-00-740-093-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:04 UTC