S 862-062
(13)
Remove electrical power if it is not necessary for other operations (AMM 24-22-00/201).
S 862-063
(14)
When the work on the hydraulic system is completed, close these applicable circuit breakers:
(a)
P7 Circuit Breaker Panel
1) 7F1 HYDRAULICS DEMAND 4
2) 7G1 HYDRAULICS DEMAND 3
3) 7H1 HYDRAULICS DEMAND 2
4) 7J1 HYDRAULICS DEMAND 1
(b)
P714 Left Auxiliary External Power Center Panel 1) HYDR AUX AC PUMP 4 2) HYDR AUX AC PUMP 1
TASK 29-11-00-102-064
7. Flush the Hydraulic System__________________________
A. Special Tools and Equipment
(1)
G29006-1 Blanking Plate - Hydraulic Reservoir
B.
Standard Tools and Equipment
(1)
Hydraulic Service Cart - This cart must supply a flow of BMS 3-11 fire-resistant hydraulic fluid at 30-40 gpm at 3000 psig.
C.
References
(1)
AMM 12-12-01/301, Hydraulic Systems
(2)
AMM 22-12-03/401, Elevator Autopilot Servo Module
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747-400
MAINTENANCE MANUAL
(3)
AMM 22-13-06/401, Lateral Autopilot Servo Module
(4)
AMM 24-22-00/201, Manual Control
(5)
AMM 27-11-08/201, Central Lateral Control Package
(6)
AMM 27-11-12/201, Inboard Aileron Power Control Package Installation
(7)
AMM 27-11-13/201, Outboard Aileron Power Control Package
Installation
(8)
AMM 27-21-17/201, Rudder Power Control Module Components
(9)
AMM 27-31-07/201, Inboard Elevator Power Control Package
(10)
AMM 27-31-08/201, Outboard Elevator Power Control Package
(11)
AMM 27-31-14/201, Elevator Feel Computer
(12)
AMM 29-11-18/201, Case Drain Module
(13)
AMM 29-11-23/201, Pressure Module
(14)
AMM 29-33-01/401, Hydraulic Fluid Quantity Transmitter
(15)
AMM 32-00-30/201, Landing Gear Door Locks
(16)
AMM 54-62-00/201, Nacelle Strut Access Panels
(17)
AMM 78-31-00/201, Thrust Reverser System
D.
Access
(1)
Location Zone
454 System 1 - Strut Aft Fairing
464 System 2 - Strut Aft Fairing
735 System 2 - Wing Landing Gear Wheel Well
474 System 3 - Strut Aft Fairing
745 System 3 - Wing Landing Gear Wheel Well
484 System 4 - Strut Aft Fairing
(2)
Access Panel
454AL Trailing Edge Fairing Doors - System 1
464AL Trailing Edge Fairing Doors - System 2
474AL Trailing Edge Fairing Doors - System 3
484AL Trailing Edge Fairing Doors - System 4
E.
Procedure
(1)
Supply electrical power (AMM 24-22-00/201).
(2)
Release the pressure in the hydraulic system (Ref par. 5).
S 012-067
(3)
Open the fairing doors on the trailing edge of the strut
(AMM 54-62-00/201).
S 862-065
S 862-066
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747-400 MAINTENANCE MANUAL
S 012-068
(4) Open the right thrust reverser half (AMM 78-31-00/201).
S 982-237
WARNING: MAKE SURE ALL PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR
_______ OPERATION AREA. A FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(5) Move the ground release handle for the doors of the main landing gear to the DOORS OPEN position.
S 492-070
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
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