Loss of the BLUE RSVR QTY Input of the SDAC 1 and SDAC 2

TASK 31-54-00-810-958-A
Loss of the BLUE RSVR QTY Input of the SDAC 1 and SDAC 2

1. Possible Causes

quantity indicator of the Blue hydraulic reservoir
wiring from the quantity indicator pins A/A, B, C to the terminal block (7505VT)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 29-12-41-000-002	Removal of the Quantity Indicator of the Blue Hydraulic Reservoir
AMM 29-12-41-400-002	Installation of the Quantity Indicator of the Blue Hydraulic System
ASM 293101
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System

3. Fault Confirmation
Subtask 31-54-00-865-145-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35

Subtask 31-54-00-710-347-A

B. Test
Do the ground scanning of the central warning system AMM 31-50-00-710-001.

4. Fault Isolation
Subtask 31-54-00-810-207-A

A. If the test gives the maintenance messages
SDAC1: B HYD QTY IND 2000GQ and SDAC2: B HYD QTY IND 2000GQ:

replace the quantity indicator of the Blue hydraulic reservoir , AMM 29-12-41-000-002 and AMM 29-12-41-400-002.

(1) If the fault continues:

do a check and repair the wiring from the quantity indicator pins A/A, B, C to the terminal block (7505VT), ASM 293101.

Subtask 31-54-00-710-348-A

B. Do the test given in Para. 3.B.

[Rev.8 from Aug 2018] 2026.04.04 04:30:34 UTC