CAUTION: DO NOT LET THE CONTAMINATION GET INTO THE EAS AND THE VALVE.
_______ THE EAS AND THE VALVES ARE SENSITIVE ELECTROHYDRAULIC DEVICES. THE CONTAMINATION CAN CAUSE DAMAGE TO THE EAS AND THE VALVES.
(7)
Fully clean the area around the valve (2 or 3) with the clean hydraulic fluid.
S 432-059
(8)
Remove the covers from the hydraulic openings on the EAS (1).
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S 422-060
(9) Do the steps that follow to install the EAS valve:
(a)
Lightly lubricate the new gasket plate (4) and the O-ring (7) with the MCS352 lubricant.
(b)
Lightly lubricate the mounting screws with the G-23827 grease.
(c)
Install the new O-ring (7) on the valve (2 or 3) (Ref 20-11-19/401).
(d)
Put the gasket plate (4) on the EAS (1).
(e)
Install the valve (2 or 3) on the EAS (1) with the washers (6) and the mounting screws (5). Torque the mounting screws (5) to 50-70 pound-inches.
S 762-061
(10)
Use the bonding meter to measure the resistance between the valve (2 or 3) and the EAS (1). Make sure that the resistance is 5.0 milliohms (0.005 ohms) or less (Ref 20-22-01/601).
S 432-062
(11)
Install the lockwires on the mounting screws (5) (Ref 20-11-28/401).
S 862-074
(12)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P7 Overhead Circuit Breaker Panel
1) 7D7, FLT CONT CMPTR L SERVO
2) 7D8, FLT CONT CMPTR L PWR
3) 7D12, FLT CONT CMPTR C SERVO
4) 7D13, FLT CONT CMPTR C PWR
5) 7D14, FLT CONT CMPTR R SERVO
6) 7D15, FLT CONT CMPTR R PWR
7) 7E7, STAB TRIM L S/O VALVE
8) 7E20, STAB TRIM R S/O VALVE
(b)
P180 DC Power Distribution Panel
1) 180E7, ELEV/RUD VLV SYS 2
2) 180E22, ELEV/RUD VLV SYS 4
3) 180H8, ELEV/RUD VLV SYS 1
4) 180H23, ELEV/RUD VLV SYS 3
F. Operational Test
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S 862-075
WARNING:_______ MAKE SURE THAT YOU MOVE PERSONS AND BLOCKAGES AWAY FROM THE
CONTROL SURFACES. THE CONTROL SURFACES CAN MOVE SUDDENLY WHEN
YOU REMOVE THE HYDRAULIC POWER. THIS CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO EQUIPMENT.
(1)
Supply hydraulic pressure to the hydraulic systems 1, 2, and 3 (Ref 29-11-00/201).
S 862-076
(2)
Set the No. 1, 2, 3, and 4 switches of the FLT CONTROL SHUTOFF TAIL VALVE to the NORM position. The switches are on the Pilots' Overhead Maintenance Panel, P461.
S 862-077
(3)
Set the No. 1 and 2 switches of the STAB TRIM hydraulic to the AUTO position. The switches are on the Pilots' Control Stand.
S 742-078
(4)
Do this task: Ground Test - Elevator Servo (Ref 22-10-00/501).
(a)
Push the LSK that is adjacent to <SERVO-ELEVATOR.
(b)
Make sure that no fault messages show.
(c)
Continue with the instructions shown on the CDU until this message shows:
ENGAGE AUTOPILOT L C R
TO CMD POSITION
(d)
Push the applicable autopilot CMD (L, C, or R) button on the Mode Control Panel.
NOTE:____The left EAS is connected to the left FCC. The center EAS is connected to the center FCC. The right EAS is connected to the right FCC.
(e)
Push the LSK that is adjacent to <CONTINUE.
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