C.
Procedure
S 862-027
(1) Supply electrical power (AMM 24-22-00/201).
S 862-028
WARNING: MAKE SURE YOU RELEASE THE PNEUMATIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. THE PNEUMATIC SYSTEM PRESSURIZES THE HYDRAULIC RESERVOIR. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
(2) Release the pneumatic system pressure (AMM 36-00-00/201).
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29-11-05
ALL ú ú 01 Page 207 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 862-029
WARNING: MAKE SURE YOU RELEASE THE HYDRAULIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
(3)
Release the hydraulic system pressure (AMM 29-11-00/201).
S 862-030
(4)
Open the applicable EDP DEPRESS circuit breaker:
(a)
P7 Overhead Circuit Breaker Panel
1) 7J2 EDP DEPRESS 1
2) 7H2 EDP DEPRESS 2
3) 7G2 EDP DEPRESS 3
4) 7F2 EDP DEPRESS 4
S 012-032
(5)
Open the thrust reverser half on the right side of the engine (AMM 78-31-00/201).
S 442-034
(6)
Do the hydraulic pump activation:
(a)
Remove the cover from the drive pad for the hydraulic pump: 1) Remove the four locknuts that attach the drive cover to the
hydraulic pump pad. 2) Remove the drive pad cover and the gasket. 3) Discard the gasket.
(b)
Remove the plug and seal assembly from the gearbox drive shaft: 1) Remove the the tab washer and the nut from the end of the
bolt. 2) Remove the gearshaft bolt and the gearshaft plug.
(c)
Remove the plug assemblies from the supply hose, the outlet hose, and the case drain hose.
(d)
Remove the pump pad plug.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-05
ALL ú ú 01 Page 208 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(e)
Connect the drain line for the pump pad.
(f)
Install the EDP (AMM 29-11-05/401).
S 412-047
(7) Close the thrust reverser on the right side of the engine (AMM 78-31-00/201).
TASK 29-11-05-402-049
5. Deactivated Engine-Driven Pump (EDP) Removal (Fig. 201)
_______________________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 29-11-00/201, Hydraulic Power
(3)
AMM 29-11-05/401, Engine-Driven Pump
(4)
AMM 36-00-00/201, Pneumatic System
(5)
AMM 78-31-00/201, Thrust Reverser System
B.
Access
(1)
Location Zones 412 Engine 1 - Gearbox Forward Face 5:00 o'clock 422 Engine 2 - Gearbox Forward Face 5:00 o'clock 432 Engine 3 - Gearbox Forward Face 5:00 o'clock 442 Engine 4 - Gearbox Forward Face 5:00 o'clock
(2)
Access Panels
416 Right Thrust Reverser Half - Engine 1
426 Right Thrust Reverser Half - Engine 2
436 Right Thrust Reverser Half - Engine 3
446 Right Thrust Reverser Half - Engine 4
C.
Procedure
S 862-050
(1) Supply electrical power (AMM 24-22-00/201).
S 862-051
WARNING: MAKE SURE YOU RELEASE THE PNEUMATIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. THE PNEUMATIC SYSTEM PRESSURIZES THE HYDRAULIC RESERVOIR. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
(2) Release the pneumatic system pressure (AMM 36-00-00/201).
S 862-052
WARNING: MAKE SURE YOU RELEASE THE HYDRAULIC SYSTEM PRESSURE BEFORE YOU
_______ OPEN THE HYDRAULIC SYSTEM. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
(3) Release the hydraulic system pressure (AMM 29-11-00/201).
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