- replace the EVMU (2EV), (Ref. AMM TASK 77-32-34-000-042) and (Ref. AMM TASK 77-32-34-400-042).
 B. Do the test given in Para. 3.A.
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 TASK 77-30-00-810-813
 Failure of the EVMU
 1. Possible Causes
_______________
 - EVMU (2EV)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 77-32-34-000-042 Removal of the Engine Vibration Monitoring Unit (EVMU) AMM 77-32-34-400-042 Installation of the Engine Vibration Monitoring Unit (EVMU) R AMM 77-32-34-710-040 Operational Check of EVMU through CFDS
 3. Fault Confirmation
__________________
 A. Test Do the operational test of the Engine Vibration Monitoring Unit (EVMU) through the Centralized Fault Display System (CFDS) (Ref. AMM TASK 77-32-34-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message EVMU:
 - replace the EVMU (2EV), (Ref. AMM TASK 77-32-34-000-042) and (Ref. AMM TASK 77-32-34-400-042).
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 Loss of the EVMU Output Bus
 1. Possible Causes
_______________
 - EVMU (2EV)

 - wiring from the EVMU (2EV) pins AA/13A, 13C to the first terminal block

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-32-00-869-002 Procedure for Class 3 Faults Reading AMM 77-32-34-000-042 Removal of the Engine Vibration Monitoring Unit (EVMU) AMM 77-32-34-400-042 Installation of the Engine Vibration Monitoring Unit (EVMU) ASM 77-32/02
 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
 -------------------------------------------------------------------------------
121VU ENGINE/ENG1 AND 2/EVMU 1EV R44
 B. Test On the CFDS MENU page, get access to the AVIONICS STATUS page (Ref. AMM TASK 31-32-00-869-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message NO EVMU DATA:
 - replace the EVMU (2EV) (Ref. AMM TASK 77-32-34-000-042) and (Ref. AMM TASK 77-32-34-400-042).
 (1) If the fault continues:
 - do a check and repair the wiring from the EVMU (2EV) pins AA/13A, 13C to the first terminal block (Ref. ASM 77-32/02).
 B. Do the test given in Para. 3.
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 TASK 77-30-00-810-831

 Loss of the EVMU Output Bus
 1. Possible Causes
_______________
 - EVMU (2EV)

 - wiring from the EVMU (2EV) pins AA/13A, 13C 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 77-32-34-000-042 Removal of the Engine Vibration Monitoring Unit (EVMU) AMM 77-32-34-400-042 Installation of the Engine Vibration Monitoring Unit (EVMU) ASM 77-32/02
 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
　
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