Loss of the ENG 1 OIL QTY Input of the SDAC 2

TASK 31-54-00-810-824-A
Loss of the ENG 1 OIL QTY Input of the SDAC 2

1. Possible Causes

XMTR-OIL QTY [4002EN]
wiring
SDAC-2 [1WV2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
AMM 31-55-34-000-001	Removal of the SDAC
AMM 31-55-34-400-001	Installation of the SDAC
AMM 79-31-15-000-040	Removal of the Oil Quantity Transmitter
AMM 79-31-15-000-041	Removal of the Oil Quantity Transmitter
AMM 79-31-15-400-040	Installation of the Oil Quantity Transmitter
AMM 79-31-15-400-041	Installation of the Oil Quantity Transmitter
ASM 793601

3. Fault Confirmation
Subtask 31-54-00-710-085-A

A. Not applicable, the fault is evident.

4. Fault Isolation
Subtask 31-54-00-810-073-A ** ON A/C NOT FOR ALL

A. If the fault is identified by the maintenance message:

SDAC2: ENG1 OIL QTY XMTR 4002EN:

(1) Replace XMTR-OIL QTY [4002EN] AMM 79-31-15-000-040 and AMM 79-31-15-400-040.
(2) If the fault continues:

do a check and repair the wiring from the SDAC 2 (1WV2) pins AB/15E, 15F to the OIL QTY XMTR (4002EN) pins A/3, 4 ASM 793601.

(3) If the fault continues:

replace the SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.

Subtask 31-54-00-810-073-B ** ON A/C NOT FOR ALL

A. If the fault is identified by the maintenance message:

SDAC2: ENG1 OIL QTY XMTR 4002EN:

(1) Replace XMTR-OIL QTY [4002EN] AMM 79-31-15-000-041 and AMM 79-31-15-400-041.
(2) If the fault continues:

do a check and repair the wiring from the SDAC 2 (1WV2) pins AB/15E, 15F to the OIL QTY XMTR (4002EN) pins A/3, 4 ASM 793601.

(3) If the fault continues:

replace the SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.

Subtask 31-54-00-865-063-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/OIL/QTY	1EN1	N39

Subtask 31-54-00-710-084-A

C. Test
(1) Do the Ground Scanning of the central warning systems (SDAC) AMM 31-50-00-710-001.
(2) Make sure that the maintenance message SDAC2: ENG1 OIL QTY XMTR 4002EN is no more present.

[Rev.8 from Aug 2018] 2026.04.04 04:30:25 UTC