(2)  
Attach a dial indicator to the tail cone in such a way that you can take inboard-outboard readings from the rudder trailing edge.

CAUTION:  USE SUFFICIENT PADDING ON THE FORCE SCALE TO PREVENT DAMAGE TO THE CONTROL SURFACE.

(3)  
Apply force to the rudder surface 1 to 2 inches forward of the trailing edge (approximately 5 inches above the tailcone, measured vertically). Do these steps:

(a)  
Adjust the dial indicator to zero.

(b)  
Push the rudder trailing edge to the left with a force of approximately 5 pounds.

(c)  
Make a record of the travel shown on the dial indicator.

(d)  
Remove the force.

(e)  
Push the rudder trailing edge to the right with a force of approximately 5 pounds.

NOTE:  Do not adjust the dial indicator.

(f)  
Make a record of the travel shown on the dial indicator.

(g)  
Remove the force.

(4)  
Make sure the sum of the two travel readings is not more than 0.06 inch.

B.  Put the Airplane Back to Its Usual Condition
(1)  Release the pressure from the rudder trim control hydraulic systems A and B (Ref 27-21-0, MP).
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K18870
500  Rudder Free-Play Check 
May 01/99  Figure 602  27-09-600 
Page 605 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

5.  Elevator and Elevator Tab (Fig. 603)
A.  Do a check of the bus linkage of the elevator output torque tube:
WARNING:  KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES AND THE LANDING GEAR WHEN HYDRAULIC POWER IS SUPPLIED. THE AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, STABILIZER, LANDING GEAR AND THRUST REVERSERS CAN MOVE QUICKLY WHEN SUPPLIED WITH POWER BY THE HYDRAULIC SYSTEMS. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(1)  
Pressurize the elevator control hydraulic system A (Ref 27-31-0, MP).

CAUTION: USE SUFFICIENT PADDING ON THE FORCE SCALE TO PREVENT DAMAGE TO THE CONTROL SURFACE.

(2)  
Put a piece of tape on the left side of the airplane tailcone adjacent to the elevator trailing edge. Do these steps.

(a)  
Tape a pointer on the trailing edge of the elevator. The end of the pointer should be close to but not touching the tape.

(b)  
Apply an upward force of 8 ±0.5 pounds to the left elevator. The force should be applied within 0.5 inch forward of the trailing edge and 1 inch outboard of the inboard edge.

(c)  
Make a mark on the tape showing the upward limit of elevator travel.

(d)  
Apply a downward force of 8 ±0.5 pounds to the left elevator. The force should be applied within 0.5 inch forward of the trailing edge and 1 inch outboard of the inboard edge.

(e)  
Make a mark on the tape showing the downward limit of elevator travel.

(f)  
Measure the distance between the upward limit mark and the downward limit mark.

(g)  
Make sure that the distance does not exceed 0.21 inch.

(3)
Release the pressure from the elevator control hydraulic system A (Ref 27-31-0, MP).

WARNING:  KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES AND THE LANDING GEAR WHEN HYDRAULIC POWER IS SUPPLIED. THE AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, STABILIZER, LANDING GEAR AND THRUST REVERSERS CAN MOVE QUICKLY WHEN SUPPLIED WITH POWER BY THE HYDRAULIC SYSTEMS. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.

(4)  
Pressurize the elevator control hydraulic system B (Ref 27-31-0, MP).

CAUTION: USE SUFFICIENT PADDING ON THE FORCE SCALE TO PREVENT DAMAGE TO THE CONTROL SURFACE.

(5)  
Put a piece of tape on the right side of the airplane tailcone adjacent to the elevator trailing edge. Do these steps.

(a)  
Tape a pointer on the trailing edge of the elevator. The end of the pointer should be close to but not touching the tape.

(b)  
Apply an upward force of 8 ±0.5 pounds to the right elevator. The force should be applied within 0.5 inch forward of the trailing edge and 1 inch outboard of the inboard edge.

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K18871
500  Elevator and Elevator Tab Free-Play Checks 
　
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