Failure of the Oil Pressure Transmitter on Engine 1

TASK 79-33-00-810-814-A
Failure of the Oil Pressure Transmitter on Engine 1

1. Possible Causes

XMTR-OIL PRESS [4003EN]
wiring from the oil pressure transmitter (4003EN) pins A/4,3 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 79-33-15-000-040	Removal of the Oil Pressure Transmitter
AMM 79-33-15-000-041	Removal of the Oil Pressure Transmitter
AMM 79-33-15-400-040	Installation of the Oil Pressure Transmitter
AMM 79-33-15-400-041	Installation of the Oil Pressure Transmitter
ASM 793601

3. Fault Confirmation
Subtask 79-33-00-865-050-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/PRESS	2EN1	N40

Subtask 79-33-00-710-070-A ** ON A/C NOT FOR ALL

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

4. Fault Isolation
Subtask 79-33-00-810-060-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SDAC1 : ENG1 OIL PRESS XMTR 4003EN and SDAC2 : ENG1 OIL PRESS XMTR 4003EN:

(1) If the fault continues:

Do a check and repair the wiring from the oil pressure transmitter (4003EN) pins A/4,3 to the first terminal block ASM 793601 and ASM 793601.

Subtask 79-33-00-810-060-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SDAC1 : ENG1 OIL PRESS XMTR 4003EN and SDAC2 : ENG1 OIL PRESS XMTR 4003EN:

(1) If the fault continues:

do a check and repair the wiring from the oil pressure transmitter (4003EN) pins A/4,3 to the first terminal block ASM 793601 and ASM 793601.

Subtask 79-33-00-710-071-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:38:24 UTC