(l)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 1)  P180 DC Power Distribution Panel a) 180E7 ELEV/RUD VLV SYS 2 b) 180E22 ELEV/RUD VLV SYS 4 c) 180H8 ELEV/RUD VLV SYS 1 d) 180H23 ELEV/RUD VLV SYS 3

 (m)  
Set all the FLT CONTROL HYD POWER TAIL switches on the P461 Pilots' Overhead Maintenance Panel to NORM.

 L.  
Put the Airplane to its Usual Condition

 S 865-060
 (1)  If the hydraulic power is not necessary, do this task: "Remove Hydraulic Power" (Ref 29-11-00/201).
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747-400 MAINTENANCE MANUAL
 S 865-061
 (2)  
If the electrical power is not necessary, do this task: "Remove Electrical Power" (Ref 24-22-00/201).

 S 415-062

 (3)  
Install the ceiling access panels.

 S 015-064

 (4)
Close the access doors 312A and 315A (Ref 06-09-05/201).

 TASK 27-31-00-735-065
 4.  System Test - Elevator Control System_____________________________________
 A. Special Tools and Equipment
 (1)  
F52485-500 Protractor (Optional)

 (2)  
4MIT65B80307-1 Control Column Protractor (Preferred)

 (3)  
G12001-50 Rig Pin Kit

 B.
Standard Tools and Equipment

 (1)  
Spring Scale - 0-150 pounds

 (2)  
Steel Tape - 4 foot

 (3)  
Pitot-Static Test Equipment

 (4)  
Dial Indicator - Accurate to 0.001 inch

 C.
References

 (1)  
06-09-05/201, Body Section 48 Access Doors and Panels

 (2)  
24-22-00/201, Manual Control

 (3)  
27-41-00/201, Horizontal Stabilizer Trim Control System

 (4)  
29-11-00/201, Main Hydraulic Supply System

 D.  Access
 (1) Location Zone 221, 222  Control Cabin
 335  Elevator Inboard, LH
 336  Elevator Outboard, LH
 345  Elevator Inboard, RH
 346  Elevator Outboard, RH
 311, 312  Area Aft of Pressure Bulkhead
 315, 316  Area Aft of Stabilizer Center Section

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747-400
MAINTENANCE MANUAL

 (2)  
Access Panel
 312A Horizontal Stabilizer Jackscrew Access Door
 315A Access Door

 E.
Prepare for Test

 S 865-066
 (1)
Do this task: "Supply Electrical Power" (Ref 24-22-00/201).

 S 865-071

 (2)  
Do this task: "Supply Hydraulic Power" (Ref 29-11-00/201).

 S 865-072

 (3)  
Pressurize the auxiliary pitot static systems No. 1 and 2 to 2.50 +/- 0.10 psi (or 317 +/- 10 knots IAS. Note: reference static pressure to ambient pressure.)(Ref 34-11-00/201).

 S 865-073

 (4)  
Use the STAB TRIM ALTN switches on the P8 control stand to set the stabilizer to the neutral rig position (Ref 27-41-00/201).

 (a)  
Make sure the stabilizer trim position indicators on the P8 control stand shows 3.00 units of trim.

 (b)  
Make sure the B dimension on the stabilizer jackscrew is

 7.42 +/- 0.05 inches.
 S 015-074
 (5)  
Open the access doors 312A and 315A (Ref 06-09-05/201).

 F.
Do A Test of the Elevator Control System

 S 225-077
 (1)  
Make sure the elevator is in the neutral position:

 (a)  
Make sure that the control column is in the neutral position.

 (b)  
Make sure that the trailing edge of the inboard elevators are in the tolerance of | 0.40 inches of the elevator index plate groove.
　
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