(b)
Center the plunger of the dial indicator within 0.1 of the aileron trailing edge.
(c)
Adjust the dial indicator to zero.
CAUTION: USE SUFFICIENT PADDING ON THE FORCE SCALE TO PREVENT DAMAGE TO THE CONTROL SURFACE.
(4) Use a force scale and apply a load to the aileron center rib (adjacent to the outboard edge of the aileron tab) and centered within 0.5 inch of the trailing edge.
(a)
Push up with a force of approximately 5 pounds.
(b)
Make a record of the travel shown on the dial indicator.
(c)
Remove the force.
NOTE: Do not adjust the dial indicator.
(d)
Push down with a force of approximately 5 pounds.
(e)
Make a record of the travel shown on the dial indicator.
(f)
Remove the force.
500
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-09-600 Page 601
K18868
Aileron Free-Play Check 500
27-09-600 Figure 601 May 01/99
Page 602
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(5)
Make sure the total up-and-down freeplay of the aileron, is not more than 0.125 inch.
(6)
Remove the dial indicator.
(7)
Remove the mounting device.
(8)
Do the same check on the opposite aileron.
B. Do a check of the play of one aileron balance tab with no movement of the aileron:
(1)
Make sure the control wheel is centered.
CAUTION: BE VERY CAREFUL WHEN YOU INSTALL THE MOUNTING DEVICE. SPECIALLY WITH AN AILERON MADE OF COMPOSITE MATERIALS. THE MOUNTING DEVICE CAN CAUSE DAMAGE TO THE AILERON IF YOU ARE NOT CAREFUL.
(2)
Attach a mounting device to the aileron trailing edge and do these steps:
(a)
Attach the dial indicator to the aileron.
(b)
Center the plunger of the dial indicator within 0.1 and forward of the tab trailing edge.
(c)
Adjust the dial indicator to zero.
CAUTION: USE SUFFICIENT PADDING ON THE FORCE SCALE TO PREVENT DAMAGE TO THE CONTROL SURFACE.
(3)
Use a force scale and apply force within 0.25 inch of the tab trailing edge and directly opposite to the tab control rods.
(a)
Push up with a force of approximately 5 pounds.
(b)
Make a record of the travel shown on the dial indicator.
(c)
Remove the force.
NOTE: Do not adjust the dial indicator.
(d)
Push down with a force of approximately 5 pounds.
(e)
Make a record of the travel shown on the dial indicator.
(f)
Remove the force.
(4)
Make sure the total up-and-down freeplay of the aileron balance tab is not more than
0.063 inch.
(5)
Remove the dial indicator.
(6)
Remove the mounting device.
(7)
Do these steps to make sure the axial play (inboard-outboard direction) of the tab is not more than 0.040 inch.
(a)
Hold the aileron tab around the trailing edge and move it outboard using hand pressure.
(b)
Use a feeler gage to measure the clearance between the aileron and the outboard end of the aileron tab and make a record of this clearance.
NOTE: It may be necessary to insert a flat metal filler block between the aileron and the aileron tab to help in this measurement. The nominal clearance between the aileron and the aileron tab is 0.15 to 0.25 inch.
(c)
Hold the aileron tab around the trailing edge and move it inboard using hand pressure.
(d)
Measure the clearance between the aileron and the outboard end of the aileron tab.
500
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-09-600 Page 603
NOTE: The axial play is the difference in clearance measurements recorded in this step and the clearance recorded before.
(8) Do the same check on the tab of the opposite aileron.
C. Put the Airplane Back to Its Usual Condition
(1) Release the pressure from the aileron hydraulic systems A and B (Ref 27-11-0, MP).
4. Rudder (Fig. 602)
A. Do a check of the rudder play with no movement of the rudder pedal:
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.
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