Failure of the Oil Quantity Transmitter on Engine 1

TASK 79-31-00-810-805-A
Failure of the Oil Quantity Transmitter on Engine 1

1. Possible Causes

XMTR-OIL QTY [4002EN]
wiring from the oil quantity transmitter (4002EN) pins A/3,4 to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
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 79-31-00-865-052-A ** ON A/C NOT FOR ALL

A. 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 79-31-00-710-058-A ** ON A/C NOT FOR ALL

B. Do the operational test of the central warning systems AMM 31-50-00-710-001.

4. Fault Isolation
Subtask 79-31-00-810-054-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SDAC1 : ENG1 OIL QTY XMTR 4002EN:

(1) If the fault continues:

do a check and repair the wiring from the oil quantity transmitter (4002EN) pins A/3,4 to the first terminal block ASM 793601 and ASM 793601.

Subtask 79-31-00-810-054-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SDAC1 : ENG1 OIL QTY XMTR 4002EN:

(1) If the fault continues:

do a check and repair the wiring from the oil quantity transmitter (4002EN) pins A/3,4 to the first terminal block ASM 793601 and ASM 793601.

Subtask 79-31-00-710-059-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:38:23 UTC