S 864-083

 (2)  
Make sure the STAB TRIM 2 and 3 switches are in the CUTOUT position. Make sure DO-NOT-OPERATE tags are on the STAB TRIM switches. You can find these switches on the Pilots' Control Stand.

 S 864-188

 (3)  
Make sure these circuit breakers are open and DO-NOT-CLOSE tags are on the 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
 8) 7E20, STAB TRIM R S/O

 (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

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 S 864-199
 (4)  
Make sure DO-NOT-OPERATE tags are on the two control columns.

 S 834-084

 (5)
Make sure rig pin E-1 is in the forward quadrant (Fig. 402, Sh. 1).

 S 484-200
 WARNING:_______DO NOT TOUCH THE PNEUMATIC DUCTS WHEN THEY ARE HOT. WHEN THE DUCTS ARE HOT THEY CAN CAUSE INJURY TO PERSONS.
 (6)  Make sure rig pin E-2 is in the aft quadrant (Fig. 402, Sh. 2).
 H. Procedure
 S 164-087
 CAUTION:_______DO NOT PERMIT CONTAMINATION TO GET INTO THE EAS. THE EAS IS A SENSITIVE DEVICE. CONTAMINATION CAN CAUSE DAMAGE AND FAILURE TO THE EAS.
 (1)  
Clean the mounting face of the EAS mounting bracket with a clean rag.

 S 164-088

 (2)  
Clean the mounting face of the EAS with a clean rag.

 S 424-089

 (3)  
Hold the EAS in the correct position for the installation.

 S 424-090

 (4)  
Install the mounting bolts (1) in the deep end of the EAS mounting bracket.

 S 424-091

 (5)  
Install the mounting bolts (1), washers (2), and nuts (3) in the shallow end of the EAS mounting bracket.

 S 214-092

 (6)  
Do an inspection of the EAS linkage.

 (a)  
Examine the control rod for worn areas, bends, cracks or corrosion.

 (b)  
Examine the output crank of the EAS for worn areas.

 (c)  
Examine the control rod bearing for worn areas.

 (d)  
If the condition of the control rod is unsatisfactory, replace the control rod (Fig. 401). 1) Remove the bolt (10), washer (11), and nut (7) that hold

 the control rod to the aft torque tube. 2) For the left control rod, make sure the replacement control rod is approximately 22 15/16 inches between bolt centers.
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747-400 MAINTENANCE MANUAL
 3)  For the center control rod, make sure the replacement control rod is approximately 22 15/16 inches between bolt centers.
 4)  For the right control rod, make sure the replacement control rod is approximately 12 5/16 inches between bolt centers.
 5)  Connect the replacement rod to the aft torque tube (9) with bolt (10), washer (11) and nut (7).
 S 434-094
 (7)  
Attach the control rod to the EAS output crank with bolt (5), washer (6), and nut (7).

 S 434-095

 (8)
Remove the caps on the hydraulic lines and the EAS hydraulic ports.

 S 434-096

 (9)  
Connect the hydraulic lines to the EAS hydraulic ports.

 S 764-097

 (10)
 Use the bonding meter to measure the resistance between the EAS body and the airplane structure. The maximum resistance is 3.0 milliohms

 (0.003 ohms).
　
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