Water Quantity Indication Failure

TASK 38-13-00-810-801-A
Water Quantity Indication Failure

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 38-13-00-710-001	Operational Test of the Quantity Indicating System
AMM 38-13-00-710-002	Operational Test of the Door Limit Switch
AMM 38-13-00-820-801	Adjustment of the Stud for Limit-Switch (5MA) of Potable-Water Service-Panel Access-Door (171AL)
ASM 381301
AMM 38-13-11-000-001	Removal of the Quantity Transmitter
AMM 38-13-11-400-001	Installation of the Quantity Transmitter
AMM 38-13-16-000-001	Removal of the Water Service-Panel Door-Switch
AMM 38-13-16-400-001	Installation of the Water Service-Panel Door-Switch
AMM 38-13-21-000-001	Removal of the Quantity Indicator
AMM 38-13-21-400-001	Installation of the Quantity Indicator
AMM 38-14-00-710-001	Operational Test of the Potable Water Drain-System

3. Fault Confirmation
Subtask 38-13-00-710-050-A ** ON A/C NOT FOR ALL

A. Test
(1) Do a test of the Quantity Indicating System AMM 38-13-00-710-001.

Subtask 38-13-00-710-050-B ** ON A/C NOT FOR ALL

A. Test
(1) Do a test of the Quantity Indication System AMM 38-13-00-710-001.
(2) Do a test of the Water Draining (Dump) AMM 38-14-00-710-001.

4. Fault Isolation
Subtask 38-13-00-810-050-B

A. If there is no quantity indication (no LED illumination/quantity indicator) on the FORWARD ATTENDANT PANEL 120RH/SERVICE PANEL 2023VU:

(1) If the fault continues:

do a check of the MSW-LIMIT SW [5MA] AMM 38-13-00-710-002
do a check of the MSW-LIMIT SW [5MA] adjustment and adjust as necessary AMM 38-13-00-820-801.

(2) If the fault continues:

(3) If the fault continues:

(4) If the fault continues:

(5) If the fault continues:

do a check and repair the aircraft wiring between the:
CB 1MA and the connector A/C TRANSMITTER,QUANTITY [3MA] ASM 381301.

Subtask 38-13-00-710-051-A

B. Do the test as given in paragraph 3. A.

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