WARNING : MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY
_______
OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM.
1. Reason for the Job
__________________
To bleed the braking system after all maintenance operations of the alternate braking system.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific container
No specific warning notices
No specific Torque Wrench : range 1.00 to 10.00 m.daN
(8.00 to 75.00 lbf.ft)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 11-004 USA MIL-T-81533
1.1.1TRICHLOROETHANE (METHYL CHLOROFORM)
(Ref. 20-31-00)
Material No. 19-003 USA AMS 3819
LINT-FREE COTTON CLOTH (Ref. 20-31-00)
Material No. 19-010 USA AMS 5687
LOCKWIRE STAINLESS STEEL ANNEALED 0.8MM DIA
(Ref. 20-31-00)
1EFF : ALL 1 32-43-00Page 315 1 1 Aug 01/05 1 1 1CES 1 C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-12-29-611-001 Fill the Hydraulic Fluid Reservoir with a Hand Pump 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 29-10-00-863-002 Pressurize the Yellow Hydraulic System 29-10-00-864-001 Depressurize the Green Hydraulic System 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
the Ground Connector 29-23-00-864-001 Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
R 32-43-00-710-001 Operational Check of Alternate Braking System 32-43-16-600-001 Reactivation of the Alternate-Brake Safety-Valve 32-43-00-991-003 Fig. 303
**ON A/C ALL
R Post SB 32-1190 For A/C 001-002,051-052,
32-43-00-991-007 Fig. 304
**ON A/C ALL
3. Job Set-up
__________
Subtask 32-43-00-860-052
A. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002)
(2)
On the panel 400VU, make sure that the Landing Gear control-lever is set to DOWN.
(3)
On the panel 110VU, make sure that the PARK BRK control switch is set to OFF.
1EFF : ALL 1 32-43-00Page 316 1 1 May 01/05 1 1 1CES 1
(4)
Pressurize the Yellow hydraulic system (Ref. TASK 29-10-00-863-002).
-Make sure that the Green hydraulic system is depressurized (Ref. TASK 29-10-00-864-001).
(5)
If you do the bleeding after rupture of a hydraulic line, you must do the reactivation of the Yellow brake safety valve (Ref. TASK 32-43-16-600-001).
Subtask 32-43-00-941-053
B. Safety Precautions
(1)
Put the warning notices in position to tell persons not to operate the landing gear.
(2)
Put the warning notices in position to tell persons not to pressurize the Green hydraulic system.
4. Procedure
_________
(Ref. Fig. 303/TASK 32-43-00-991-003) Subtask 32-43-00-870-053
A. Bleeding of the Alternate Braking System
NOTE : Bleed port for the alternate brake system (Yellow Hydraulic
____
System) is the forward bleed port.
(1)
Remove the bleed screw plug from the related brake unit.
(2)
Connect a vinyl hose and put one end in a container that contains HYDRAULIC FLUID (Material N.02-003).
(3)
Moderately push down the brake pedal related to the brake to be bled.
(4)
Slowly loosen the bleed screw to get a smooth flow of the fluid. Let the fluid flow until it has no air bubbles.
(5)
Keep the pressure on the brake and tighten the bleed screw.
(6)
Release the brake pedal.
1EFF : ALL 1 32-43-00Page 317 1 1 May 01/03R 1 1 1CES 1
Brake Unit Bleed Valves Figure 303/TASK 32-43-00-991-003
1EFF : 1 1R 1CES ALL 1 11 1 32-43-00 Page 318 Aug 01/98
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