C.  
Procedure

 S 864-002-N00
 (1)  
For the applicable engine, open this circuit breaker and install a DO-NOT-CLOSE tag:

 (a)  P6 Main Power Distribution Panel
 1) 6H26 VIB AMP ENG 1&2
 2) 6H27 VIB AMP ENG 3&4

 (2)  
Remove the applicable AVM signal conditioner (AMM 20-11-22/401).

 S 024-003-N00
 TASK 77-31-03-404-004-N00
 3.  Install Airborne Vibration Monitor Signal Conditioner (Fig. 401)_____________________________________________________
 A.  References
 (1)  
AMM 20-11-22/401, Rack-Mounted Electrical/Electronic Module

 (2)  
AMM 77-31-00/501, Airborne Vibration Monitoring (AVM) System

 (3)  
IPC 77-31-52, Fig. 1

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
BSEE AVM SIGNAL CONDITIONER, M7846 (E2-1) 
BSEE AVM SIGNAL M118 (E1-1) CONDITIONER, 
ASEE ELECTRONIC EQUIPMENT RACK, E1/E2  FWD ELECTRONIC EQUIPMENT RACK, E1/E2 
A 
TEST SWITCH  RED LIGHT 
Self Test  ? 
YES  NO 
2 3 4 5 7 9 10 12 13 14 15 17 18 19 20 16 1116 RECORD MOD 8  SWITZERLAND ENGINE VIBRATION MONITOR Type: S/N: 0007 2000-01 PSCM No.: S3960 EVM 280 P/N: 241-280-051-012 BO no S362A001-1 vibro meter 
AVM SIGNAL CONDITIONER  AVM SIGNAL CONDITIONER 
B  1  B  2 
1 2  AIRPLANES WITH ENDEVCO S360N021 AVM AIRPLANES WITH VIBRO-METER S362A001 AVM 

Airborne Vibration Monitor (AVM) Signal Conditioner Installation
Figure 401

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(4)  
WDM 77-12-11, 77-12-12, 77-12-13, 77-12-14, 77-12-21, 77-12-22

 (5)  
WDM 77-12-23, 77-12-24, 77-31-11, 77-31-12

 (6)  
SSM 77-31-01

 B.
Access

 (1)  
Location Zone
 117 Electrical & Electronic Compartment, LH
 118 Electrical & Electronic Compartment, RH

 C.
Procedure

 S 424-005-N00
 (1)  
Install the applicable AVM signal conditioner (AMM 20-11-22/401).

 S 864-006-N00

 (2)  
For the applicable engine, remove the DO-NOT-CLOSE tag and close this circuit breaker:

 (a)  P6 Main Power Distribution Panel
 1) 6H26 VIB AMP ENG 1&2
 2) 6H27 VIB AMP ENG 3&4

 S 714-007-N00
 (3) Do the operational test for the AVM system (AMM 77-31-00/501).
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