27-21-22
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(c)
If there is leakage of the fluid, identify the fluid and clean the area (Ref 12-25-01/301).
(d)
Remove the hydraulic fuse from the airplane.
S 034-009
CAUTION: DO NOT LET THE HYDRAULIC LINES AND FITTINGS STAY OPEN.
_______ CONTAMINATION OF THE HYDRAULIC SYSTEM CAN OCCUR. THIS CAN CAUSE DAMAGE TO THE SYSTEM COMPONENTS AND LEAKAGE OF HYDRAULIC FLUID.
MAKE SURE YOU FULLY CLEAN ALL HYDRAULIC FLUID LEAKAGE. HYDRAULIC FLUID CAN CAUSE CORROSION.
(4) Install the caps on the hydraulic tubes.
TASK 27-21-22-404-004
3. Lower Rudder Hydraulic Fuse Installation (Fig. 401)________________________________________
A. Consumable Materials
(1)
D00054 Assembly Lube - Skydrol, MCS 352
B.
References
(1)
12-12-01/301, Hydraulic Systems
(2)
12-25-01/301, Exterior Cleaning
C.
Access
(1)
Location Zone
311 Area Aft of Pressure Bulkhead, LH
312 Area Aft of Pressure Bulkhead, RH
(2)
Access Panel 312A Horizontal Stabilizer Jackscrew Access Door
D.
Procedure
(1)
Make sure the ends of the hydraulic tubes are clean and serviceable.
S 214-010
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747-400 MAINTENANCE MANUAL
S 434-011
CAUTION:_______ DO NOT LET THE HYDRAULIC LINES AND FITTINGS STAY OPEN.
CONTAMINATION OF THE HYDRAULIC SYSTEM CAN OCCUR. THIS CAN
CAUSE DAMAGE TO THE SYSTEM COMPONENTS AND LEAKAGE OF HYDRAULIC
FLUID.
MAKE SURE YOU FULLY CLEAN ALL HYDRAULIC FLUID LEAKAGE.
HYDRAULIC FLUID CAN CAUSE CORROSION.
(2)
Remove the caps from the hydraulic tubes.
S 114-012
(3)
If there is leakage of the fluid, identify the fluid and clean the area (Ref 12-25-01/301).
S 644-028
(4)
Apply the assembly lube to the threads of the hydraulic fittings.
S 424-013
(5)
Install the hydraulic fuse:
(a)
Put the hydraulic fuse in its position between the hydraulic tubes.
(b)
Tighten the two nuts to connect the hydraulic fuse to the hydraulic tubes.
S 434-014
(6)
Install the support clamps on the hydraulic tubes.
S 414-030
(7)
Close the access door 312A.
S 614-046
(8)
Fill the hydraulic reservoirs if it is necessary (Ref 12-12-01/301).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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A
747-400 MAINTENANCE MANUAL
S 714-032
(9) Do the operational test of the lower rudder hydraulic fuse.
TASK 27-21-22-704-031
4. Lower Rudder Hydraulic Fuse Operational Test____________________________________________
A. References
(1)
09-11-00/201, Towing
(2)
24-22-00/201, Manual Control
(3)
29-11-00/201, Main Hydraulic Supply System
(4)
31-61-00/201, Integrated Display System
B.
Access
(1)
Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
311 Area Aft of Pressure Bulkhead, LH
312 Area Aft of Pressure Bulkhead, RH
(2)
Access Panel 312A Horizontal Stabilizer Jackscrew Access Door
C.
Procedure
S 494-016
WARNING:_______MAKE SURE THE NOSE WHEELS POINT FORWARD. IF THE NOSE WHEELS DO NOT POINT FORWARD, THE NOSE GEAR CAN QUICKLY TURN TO THE CENTERED POSITION WHEN YOU REMOVE THE TOW PIN. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
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