NO CFDIU DATA

TASK 38-31-00-810-817-A
NO CFDIU DATA

1. Possible Causes

wiring
CFDIU [1TW]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 313200
AMM 31-32-00-710-002	Operational Test of the Back-up Mode
AMM 31-32-34-000-001	Removal of the CFDIU
AMM 31-32-34-400-001	Installation of the CFDIU
AMM 38-31-00-710-009	Operational Test of the Toilet Unit
MCDU Display

3. Fault Confirmation
Subtask 38-31-00-710-080-A ** ON A/C NOT FOR ALL

A. Test
(1) Do a test of the vacuum toilet system AMM 38-31-00-710-009.
(2) Do a test of the centralized fault display interface unit (CFDIU) AMM 31-32-00-710-002.

4. Fault Isolation
Subtask 38-31-00-810-068-B ** ON A/C NOT FOR ALL

A. If the LAST LEG REPORT or PREVIOUS LEGS REPORT page gives the maintenance message CFDIU/VSC NO DATA:

MCDU Display ** ON A/C NOT FOR ALL

do a check and repair the wiring between the:
- CFDIU connector AB/3A / AB/4A and the vacuum system controller 31MG connector AB/2H / AB/2J
- ASM 313200.

(1) If the fault continues:

replace the CFDIU [1TW] , AMM 31-32-34-000-001 and AMM 31-32-34-400-001.

Subtask 38-31-00-710-081-A ** ON A/C NOT FOR ALL

B. Test
(1) Do the test as given in paragraph 3. A. to check the correct operation.
(2) After the subsequent flight, make sure that the fault does not continue.

[Rev.8 from Aug 2018] 2026.04.04 04:34:13 UTC