77-31-01
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S 034-004-N00
 (3)  
Disconnect the electrical connector (DT677) from the engine accelerometer.

 S 034-005-N00

 (4)  
Remove the three screws that attach the accelerometer to the mounting pad on the engine flange A.

 S 024-006-N00

 (5)  
Remove the accelerometer from the engine.

 TASK 77-31-01-404-007-N00
 3. Engine Accelerometer Installation (Fig. 401)
_________________________________
 A. References
 (1)  
AMM 71-11-04/201, Fan Cowl Panels

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

 (3)  
IPC 77-31-01 Fig. 5

 (4)  
WDM 77-31-11, 77-31-12

 (5)  
SSM 77-31-01

 B.
Access

 (1)  
Location Zone
 412 Engine 1 - Fan Case 1 o'clock
 422 Engine 2 - Fan Case 1 o'clock
 432 Engine 3 - Fan Case 1 o'clock
 442 Engine 4 - Fan Case 1 o'clock

 (2)  
Access Panel
 414 Right Fan Cowl Panel - Engine 1
 424 Right Fan Cowl Panel - Engine 2
 434 Right Fan Cowl Panel - Engine 3
 444 Right Fan Cowl Panel - Engine 4

 C.
Procedure

 S 424-014-N00
 (1)  Install the engine accelerometer.
 (a)  
Put the accelerometer on the mounting pad on the engine flange A, with the electrical connector pointed aft.

 (b)  
Install the three screws that attach the accelerometer to the mounting pad.

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(c) (d)  Tighten the screws.Install lockwire on the screws.
 (2)  S 434-010-N00Connect the electrical connector (DT677) to the accelerometer.
 (3)  S 414-011-N00Close the right fan cowl panel (AMM 71-11-04/201).
 (4)  S 864-012-N00For the applicable engine, remove the DO-NOT-CLOSE tag and close this circuit breaker: (a) P6 Main Power Distribution Panel 1) 6H26 ENG 1 & 2 VIB AMP 2) 6H27 ENG 3 & 4 VIB AMP
 (5)  S 714-013-N00Do the operational test for the AVM system (AMM 77-31-00/501).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
AIRBORNE VIBRATION MONITOR SIGNAL CONDITIONER -
_______________________________________________ REMOVAL/INSTALLATION
____________________
 1.  General_______
 A.  This procedure has two tasks. One task is the removal of the airborne
 vibration monitor (AVM) signal conditioner. The other task is the
 installation of the AVM signal conditioner.

 B.  There are two AVM signal conditioners. One is on the E1-1 shelf and the
 other is on the E2-1 shelf of the E/E rack. The AVM signal conditoners
 are identified as follows:

 Engine Number_____________ Equipment Number________________ Location
 1 and 2 M118 E1-1
 3 and 4 M7846 E2-1

 TASK 77-31-03-004-001-N00
 2.  Airborne Vibration Monitor Signal Conditioner Removal (Fig. 401)_____________________________________________________
 A.  References
 (1)  
AMM 20-11-22/401, Rack-Mounted Electrical/Electronic Module

 (2)  
IPC 77-31-52, Fig. 1

 (3)  
WDM 77-12-11, 77-12-12, 77-12-13, 77-12-14, 77-12-21, 77-12-22

 (4)  
WDM 77-12-23, 77-12-24, 77-31-11, 77-31-12

 (5)  
SSM 77-31-01

 B.  
Access

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