Subtask 27-84-53-865-050
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 5CV B06 121VU FLIGHT CONTROLS/SLT/CTL/SYS2 7CV R21
Subtask 27-84-53-010-050
C. Open the main doors of the main gear (Ref. TASK 32-12-00-010-001).
Subtask 27-84-53-860-050
D. Aircraft Maintenance Configuration
(1)
Put the access platform in position at the opening of the main door of the main gear.
(2)
Make sure that the Green and the Blue hydraulic systems are depressurized and put it in the maintenance configuration (Ref. TASK 29-00-00-864-001).
(3)
Depressurize the reservoirs of the Green and the Blue hydraulic systems (Ref. TASK 29-14-00-614-001).
(4)
Put the warning notice in position to tell persons not to pressurize the hydraulic systems.
(5)
Install the LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT (98D27504030001) to lock the left slat transmission.
(6)
Install the LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT (98D27504030001) to lock the right slat transmission.
(7)
Put a container in position below the Power Control Unit (PCU) (1).
4. Procedure
_________ (Ref. Fig. 401/TASK 27-84-53-991-001) Subtask 27-84-53-020-050
A. Removal of the Valve Block CAUTION : USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN
_______ YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU USE THE SECOND WRENCH, YOU WILL NOT LOOSEN OR TIGHTEN THE UNION TOO MUCH.
(1)
You must remove the valve block assembly (23) together with the hydraulic motor (7) and the pressure off brake (POB) (41) from the differential gearbox (40).
(a)
Disconnect the hydraulic lines (11).
(b)
Remove and discard the tie wrap (9) and disconnect the seal drain line (10).
(c)
Disconnect the case drain line (8).
(d)
Install the blanking caps on the open line ends (8),(9),(10).
(e)
Install the blanking plugs in the ports of the PCU (1).
(f)
Disconnect the electrical connector (22) from the valve block assembly (23).
(g)
Put blanking caps on the disconnected electrical connectors.
(h)
Remove the bolts (3) and the washers (2).
(i)
Support the POB (41), the valve block assembly (23) and the hydraulic motor (7).
(j)
Remove the nuts (24) and the washers (25) from the studs (42).
(k)
Remove the valve block assembly (23) together with the POB (41) and the hydraulic motor (7).
(2)
Remove the valve block assembly (23) from the POB (41) and the hydraulic motor (7).
(a)
Remove the bolts (6) and the washer (5) from the hydraulic motor (7).
(b)
Carefully remove the hydraulic motor (7) from the POB (41) and from the transfer tubes (14) on the valve block assembly (23).
(c)
Remove and discard the O-ring (4).
(d)
Carefully remove the POB from the transfer tube (33) on the valve block assembly (23).
(3)
Remove the transfer tubes (14),(33) from the valve block assembly (23).
(a)
Remove and discard the O-rings (13),(35) and the back-up rings (12),(34) from the transfer tubes (14),(33).
(b)
Remove and discard the locking rings (21),(30) which safety the transfer tubes (14),(33).
(c)
Remove the transfer tubes (14),(33) from the valve block assembly (23).
(d)
Remove and discard the back-up rings (15),(31) and the O-rings (20),(32) from the transfer tubes (14),(33).
Valve Block
Figure 401/TASK 27-84-53-991-001
1EFF : ALL 1 27-84-53 Page 404
1 1 Feb 01/98
1 1
1CES 1
TASK 27-84-53-400-001
Installation of the Valve Blocks 25CV, 26CV of the Power Control Unit (Slat)
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
GEAR.
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______
CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM FLIGHT CONTROLS 飞行操纵8(43)
