Vacuum Generator Failure

TASK 38-31-00-810-803-A
Vacuum Generator Failure

1. Possible Causes

GENERATOR,VACUUM [37MG]

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 38-31-64-000-001	Removal of the Vacuum Generator
AMM 38-31-64-400-001	Installation of the Vacuum Generator
MCDU Display ** ON A/C NOT FOR ALL

3. Fault Confirmation
Subtask 38-31-00-740-052-A ** ON A/C NOT FOR ALL

A. Fault Confirmation Test
(1) Do the operational test of the toilet unit AMM 38-31-00-710-009.
(2) Do the bite test of the vacuum toilet system AMM 38-31-00-740-001.

4. Fault Isolation
Subtask 38-31-00-810-052-C ** ON A/C NOT FOR ALL

A. If the operational test is satisfactory:

Do the bite test to get the last leg report page.
MCDU Display ** ON A/C NOT FOR ALL

(1) If the LAST LEG REPORT page gives the maintenance message VACU GEN:

do a check of the electrical connections 37MG/A and 37MG/B.

(2) If the electrical connections are correct:

replace the GENERATOR,VACUUM [37MG] AMM 38-31-64-000-001 and AMM 38-31-64-400-001.

Subtask 38-31-00-710-052-A ** ON A/C NOT FOR ALL

B. Do the test as given in Para. 3.
(1) Make sure that the vacuum toilet system operates correctly AMM 38-31-00-710-009.
(2) After the subsequent flight, make sure that the fault does not continue.

[Rev.8 from Aug 2018] 2026.04.04 04:34:12 UTC