Subtask 27-64-51-420-057
 A. Preparation for Installation
 (1)
 Remove the blanking cover from the servo-valve.

 (2)
 Use a clean MISCELLANEOUS (Material No. 19-003) and a soft brush with CLEANING AGENTS (Material No. 11-026) to clean the servo-valve (3) and the servo-control (1) interfaces.

 (3)
 Do an inspection of the component interface and/or the adjacent area.

 (4)
 Examine the gasket (5) for the correct condition and replace the item if it is damaged.

 (5)
 Make sure that the parts retained from the removed component are clean and in the correct condition.

 (6)
 Lubricate the new O-ring (2) with HYDRAULIC FLUIDS (Material No. 02-003).

 (7)
 Apply a layer of COMMON GREASE (Material No. 04-015) to the gasket (5).

 (8)
 Apply a layer of COMMON GREASE (Material No. 04-010) to the threads of the bolts (4).

R **ON A/C 001-049, 051-099, 101-149, 201-299,
 Subtask 27-64-51-420-058
 B. Installation of the Servo-Valve on the Spoiler Servo-Control
 (1)
 Install the gasket (5) on the servo-valve (3).

 (2)
 Install the new O-ring (2) on the servo-valve (3).

 (3)
 Put the servo-valve (3) into position on the spoiler servo-control (1).

 (4)
 Install the bolts (4) through the servo-valve (3) and into the spoiler servo-control valve (1).

 (5)
 TORQUE the bolts (4) to 0.69 m.daN (61.06 lbf.in). WARNING : CUT, REMOVE AND DISCARD THE LOCKWIRE AS YOU DO THE TASK.

_______ LOOSE LOCKWIRE CAN CUT OR BLIND YOU.

 (6)
 Safety the bolts (4) with MISCELLANEOUS (Material No. 19-010).

 (7)
 Lower the applicable spoiler (Ref. TASK 27-60-00-866-002).

 (8)
 On the servo-control, turn the SPOILER MAINTENANCE KEY (98D27603002000) or the SPOILER MAINTENANCE KEY (98D27603002001) in the maintenance device to the operation position and then remove it.

R **ON A/C 151-199, 301-399, 401-499,
 Subtask 27-64-51-420-058-A
 B. Installation of the Servo-Valve on the Spoiler Servo-Control
 (1)
 Install the gasket (5) on the servo-valve (3).

 (2)
 Install the new O-ring (2) on the servo-valve (3).

 (3)
 Put the servo-valve (3) into position on the spoiler servo-control (1).

 (4)
 Install the bolts (4) through the servo-valve (3) and into the spoiler servo-control valve (1).

 (5)
 TORQUE the bolts (4) to 0.69 m.daN (61.06 lbf.in). WARNING : CUT, REMOVE AND DISCARD THE LOCKWIRE AS YOU DO THE TASK.

_______ LOOSE LOCKWIRE CAN CUT OR BLIND YOU.

 (6)
 Safety the bolts (4) with MISCELLANEOUS (Material No. 19-010).

 (7)
 Lower the applicable spoiler (Ref. TASK 27-60-00-866-002).

 (8)
 On the servo-control, turn the SPOILER MAINTENANCE KEY (98D27603002000) or the SPOILER MAINTENANCE KEY (98D27603002001) in the maintenance device to the operation position and then remove it.

 **ON A/C ALL
 Subtask 27-64-51-865-055
 C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 6CV, 8CV, 1701GK, 1702GK, 1801GL, 2701GJ, 2702GJ, 3700GD, 3801GX, 3802GX, 3803GX.
 Subtask 27-64-51-863-050
 D. Fill and Pressurize the Hydraulic Systems
 WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES
_______ ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
 WARNING : MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE
_______ ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM.
 (1)
 Fill the applicable hydraulic system reservoir (Ref. TASK 12-12-29-611-001).

 (2)
 Pressurize the applicable hydraulic system:

 -
for the spoiler 1 and the spoiler 5, pressurize the Green hydraulic system (Ref. TASK 29-10-00-863-001) and the green hydraulic system reservoir (Ref. TASK 29-14-00-614-002)

 -
for the spoiler 2 and the spoiler 4, pressurize the Yellow hydraulic system (Ref. TASK 29-10-00-863-002) and the yellow hydraulic system reservoir (Ref. TASK 29-14-00-614-002)

 -
for the spoiler 3, pressurize the Blue hydraulic system (Ref. TASK 29-10-00-863-003) and the blue hydraulic system reservoir (Ref. TASK 29-14-00-614-002).

 Subtask 27-64-51-870-052
 E. Bleed the Servo-Controls
 (1) Do a minimum of five full travel operations of the spoilers, to bleed all the air from the servo-controls (Ref. TASK 27-60-00-866-002).
　
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