A-A H/A445-10
Brake System Control Unit (BSCU) Installation Figure 401
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747-400 MAINTENANCE MANUAL
(c) Remove the BSCU (AMM 20-11-22/401).
TASK 32-42-01-424-006
3. Brake System Control Unit (BSCU) - Installation_______________________________________________
A. References
(1)
AMM 06-09-02/201, Body Section 42 Access Doors and Panels
(2)
AMM 20-11-22/401, E/E Rack Mounted Components
(3)
AMM 20-41-02/201, Electrostatic Discharge Sensitive Devices
(4)
AMM 32-42-00/501, Brake Control System
(5)
AIPC 32-42-01, Fig. 1
B.
Access
(1)
Location Zones
125 Area Below Forward Cargo Container Compartment, LH (Brake System Control Unit location is at the center of the Equipment Center, E-9 Rack)
221 Control Cabin, LH
222 Control Cabin, RH
(2)
Access Panel
125B - Access Electronics
C.
Install the Brake System Control Unit (BSCU) (Fig. 401)
S 024-009
(1)
Do the steps that follow to install the BSCU:
(a)
Open access door 125B, on the bottom of the airplane fuselage, to get access to the E-9 shelf (AMM 06-09-02/201).
CAUTION: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO
_______ INSTALL THE BSCU. A FAILURE TO DO THE STEPS CORRECTLY CAN CAUSE DAMAGE TO THE EQUIPMENT.
(b)
Do this task before you install the BSCU on the E-9 shelf: "ESDS Metal Encased Units - Installation" (AMM 20-41-01/201).
(c)
Install the BSCU (AMM 20-11-22/401).
(d)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
1) P180, DC Power Distribution Panel a) 180J07, ANTI SKID 1-3 b) 180F07, ANTI SKID 2-4 c) 180J22, ANTI SKID 5-7 d) 180F22, ANTI SKID 6-8 e) 180F23, ANTI SKID 9-11 f) 180J23, ANTI SKID 10-12 g) 180F08, ANTI SKID 13-15 h) 180J08, ANTI SKID 14-16 i) 180J25, AUTO BRK j) 180J09, TORQUE LIMIT 1-5, 9-13 k) 180F09, TORQUE LIMIT 2-6, 10-14 l) 180J24, TORQUE LIMIT 3-7, 11-15 m) 180F24, TORQUE LIMIT 4-8, 12-16 n) 180F25, BRK CONT IND/TEST 1
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o) 180F10, BRK CONT IND/TEST 2 2) Make sure the 180B04 IRS ON BAT circuit is closed.
S 714-010
(2) Do this task: "Ground Test - Brake System Bite" (AMM 32-42-00/501).
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ANTISKID MODULE ASSEMBLY - MAINTENANCE PRACTICES
________________________________________________
1. General
_______
A. This procedure contains these tasks:
-
Antiskid Valve Assembly (Normal Antiskid Module) - Removal
-
Antiskid Valve Assembly (Normal Antiskid Module) - Installation
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