(4)
Disconnect the electrical connector from the voltage averaging unit.
S 024-006
(5)
Remove the voltage averaging unit:
(a)
Remove the fasteners (4 locations).
(b)
Remove the voltage averaging unit.
S 014-018
S 034-004
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
DOOR FOR THE
VOLTAGE FORWARD CARGO
AVERAGING
STA
COMPARTMENT
UNIT
Voltage Averaging Unit Installation
Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 35-21-10-404-007
3. Voltage Averaging Unit Installation (Fig. 401)___________________________________
A. References
(1)
AMM 35-00-00/201, Oxygen
(2)
AMM 35-21-00/501, Oxygen System
(3)
SSM 35-11-01
(4)
WDM 35-11-13
(5)
IPC 35-21-10
B. Access
(1) Location Zone 124 Forward Cargo Container Compartment, Aft Half Right
C. Procedure
S 914-029
(1)
Read and obey the safety precautions and general instructions before you do the maintenance (AMM 35-00-00/201).
S 424-008
(2)
Install the voltage averaging unit:
(a)
Put the voltage averaging unit in position.
(b)
Install the fasteners (4 locations).
S 434-009
(3)
Connect the electrical connector to voltage averaging unit, and install a lockwire on the electrical connector.
S 784-011
(4)
Do the procedure: Do the Pressure Indication Test, in the task: Oxygen Operational Test (AMM 35-21-00/501).
(5)
Close the access panels to the oxygen cylinders.
S 414-021
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A
747-400 MAINTENANCE MANUAL
PRESSURE TRANSDUCER - REMOVAL/INSTALLATION
__________________________________________
1. General_______
A. These tasks are included in this procedure:
(1)
Removal of the pressure transducer.
(2)
Installation of the pressure transducer.
B. The removal and installation procedures are for a one pressure transducer. To do the procedures for a second pressure transducer do the same steps again.
C. A pressure transducer is installed on each cylinder coupling assembly (Fig. 401). Access to each pressure transducer is through the access panels.
TASK 35-21-11-004-001
2. Pressure Transducer Removal (Fig. 401)__________________________
A. Standard Tools and Equipment
(1) Caps and Plugs - Package of Clean Protective
B. References
(1)
AMM 35-00-00/201, Oxygen
(2)
IPC 35-21-11
(3)
SSM 35-11-01
(4)
WDM 35-11-13
C. Access
(1) Location Zone 124 Forward Cargo Container Compartment, Aft Half Right
D. Procedure
S 914-021
(1)
Read and obey the safety precautions and general instructions before you do the maintenance (AMM 35-00-00/201).
S 864-002
(2)
Open this circuit breaker and attach a DO-NOT-CLOSE tag:
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