**ON A/C 001-003, 051-054, 29-13-41-991-007 Fig. 404 R **ON A/C 004-049, 055-099, 101-149, 151-199, 201-299, 301-399, 401-499, 29-13-41-991-007-A Fig. 404A
**ON A/C ALL
3. Job Set-up
__________
Subtask 29-13-41-860-056
A. Aircraft Maintenance Configuration
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(1)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
(2)
Make sure that the access door 196BB is open.
(3)
Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001).
(4)
Make sure that the reservoir of the Yellow hydraulic system is depressurized. (Ref. TASK 29-14-00-614-001).
(5)
Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected. (Ref. TASK 29-23-00-860-001).
(6)
Make sure that the warning notices are in position to to tell persons not to pressurize the Yellow hydraulic system:
-in the cockpit on the hydraulic section 40VU of the overhead panel, - on the ground service panel of the Yellow hydraulic system.
Subtask 29-13-41-865-066
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/HYD POWER/Y 3803GX N30 123VU Y HYD/ELEC/PUMP 3802GX AB06
R 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
4. Procedure
_________
**ON A/C 001-003, 051-054,
(Ref. Fig. 404/TASK 29-13-41-991-007) R **ON A/C 004-049, 055-099, 101-149, 151-199, 201-299, 301-399, 401-499,
(Ref. Fig. 404A/TASK 29-13-41-991-007-A)
**ON A/C ALL
Subtask 29-13-41-420-053
A. Installation of the Drain Valve
(1)
Remove the blanking plug from the union.
(2)
Apply HYDRAULIC FLUIDS (Material No. 02-003) to the threads of the union and the new packing (15).
(3)
Remove the blanking plug from the drain valve (16).
(4)
Put the packing (15) in position on the drain valve (16).
(5)
Install the drain valve (16) in the union.
(6)
TORQUE the drain valve (16) to 1.5 m.daN (11.06 lbf.ft).
(7)
Safety the drain valve (16) with lockwire, corrosion resistant steel dia 0.8mm (0.032in.).
Subtask 29-13-41-860-068
B. Preparation for the Test
(1)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
(2)
Fill the reservoir of the Yellow hydraulic system (Ref. TASK 12-12-29-611-001) or (Ref. TASK 12-12-29-611-002).
(3)
Pressurize the reservoir of the Yellow hydraulic system (Ref. TASK 29-14-00-614-002).
Subtask 29-13-41-790-052
C. Leak Test of the Hydraulic Connections
(1) Examine the connection of the drain valve (16) and the union.
(2)
Make sure that there are no leaks. Subtask 29-13-41-870-052
D.
Bleeding Procedure
(1)
Pressurize the Yellow hydraulic system (Ref. TASK 29-10-00-863-002).
(2)
Keep the system pressurized for 5 minutes to bleed the Yellow hydraulic system.
(3)
Depressurize the Yellow hydraulic system (Ref. TASK 29-10-00-864-002).
5. Close-up
________ Subtask 29-13-41-860-057
A. Put the aircraft back to the serviceable condition.
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