Failure of the ENG 1/MASTER Control Switch

TASK 76-12-00-810-805-A
Failure of the ENG 1/MASTER Control Switch

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2045210
AMM 31-10-00-700-001	Test Program after Removal/Installation of a VU panel
AMM 71-00-00-710-002	Wet Motoring Check
AMM 73-25-34-000-040	Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040	Installation of the Engine Interface Unit (EIU)
AMM 73-25-34-710-040	Operational Test of the Engine Interface Unit
AMM 73-25-34-710-043	Operational Test of the Engine Interface Unit
ASM 761201

3. Fault Confirmation
Subtask 76-12-00-710-058-A ** ON A/C NOT FOR ALL

A. Test
Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) AMM 73-25-34-710-040.

Subtask 76-12-00-710-058-B ** ON A/C NOT FOR ALL

A. Test
Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) AMM 73-25-34-710-043.

4. Fault Isolation
Subtask 76-12-00-810-054-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message 115VU (MASTER LEVER 1) SW:

replace the CTL SW-ENG/MASTER 1 [3KC] on the panel 115VU ESPM 2045210 and perform the a motoring check AMM 71-00-00-710-002.
install the panel 115VU and do a test program after removal/installation of a VU panel AMM 31-10-00-700-001.

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring from the EIU 1 (1KS1) to the ENG panel (115VU) pins AA/4E, 5A to pins A/J, H ASM 761201.

Subtask 76-12-00-710-059-A ** ON A/C NOT FOR ALL

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

[Rev.8 from Aug 2018] 2026.04.04 04:37:26 UTC