Toilet System Shuts Down Constantly

TASK 38-31-00-810-851-A
Toilet System Shuts Down Constantly

1. Possible Causes

vacuum leakage

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 38-31-00-710-009	Operational Test of the Toilet Unit
AMM 38-31-00-740-001	BITE Test of the Vacuum Toilet System
AMM 38-31-00-790-002	Leak Test of the Vacuum Toilet System

3. Fault Confirmation
Subtask 38-31-00-710-148-A

A. Do a test of the vacuum toilet system AMM 38-31-00-710-009.

Subtask 38-31-00-740-082-A

B. Do the procedure to get access to the CFDS SYSTEM REPORT/TEST menu PAGE AMM 38-31-00-740-001.

4. Fault Isolation
Subtask 38-31-00-810-153-A ** ON A/C NOT FOR ALL

A. If the LAST/PREVIOUS LEGS Report constantly gives the maintenance message LIQD LVL SNSR or LIQD LVL XMTR
and
the FAP constantly gives the maintenance message SYSTEM INOP:

do the check for vacuum leakage in the vacuum toilet system AMM 38-31-00-790-002.

Subtask 38-31-00-810-153-C ** ON A/C NOT FOR ALL

A. If the LAST/PREVIOUS LEGS Report constantly gives the maintenance message LIQD LVL XMTR (40MG) or LIQD LVL SNSR (41MG)
and
the FAP constantly gives the maintenance messages NO WASTE QUANTITY DATA AVAILABLE and
VACUUM SYSTEM DISABLED - WASTE TANK FULL:

do the check for vacuum leakage in the vacuum toilet system AMM 38-31-00-790-002.

Subtask 38-31-00-710-149-A

B. Test
(1) Do the test as given in paragraph 3. A. to check the correct operation of the system.

[Rev.8 from Aug 2018] 2026.04.04 04:34:16 UTC