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5) Make sure the difference between the two measured clearances, or the axial play, is
not more than 0.040 inch (1.02 millimeter).
(k) If the freeplay of the aileron balance tab is not in the acceptable limits, do these tasks:
Aileron Balance Tab Inspection, TASK 27-11-21-200-801
Aileron Tab Control Rods Inspection, TASK 27-11-34-200-801
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SUBTASK 27-09-91-220-022
(2) Do the same freeplay check on the aileron balance tab of the opposite aileron.
F. Put the Airplane Back to Its Usual Condition
SUBTASK 27-09-91-864-001
(1) To remove power from hydraulic systems A and B, do this task: Hydraulic System A or B
Power Removal, TASK 29-11-00-860-805.
------------------------- END OF TASK ---------------------------
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Aileron Balance Tab Freeplay Check
Figure 602/27-09-91-990-810
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TASK 27-09-91-200-802
4. Rudder Inspection
A. General
(1) Use this task to do a check of the rudder control system freeplay.
B. References
Reference Title
27-21-00-800-801 Rudder Hydraulic System A, B, or Standby Pressurization (P/B 201)
27-21-00-840-801 Put the Rudder Hydraulic systems A, B, and Standby Back to the
Condition Before the Pressurization (P/B 201)
C. Tools/Equipment
Reference Description
STD-753 Scale - Push/Pull, 0-25 pound (0-11 kilogram) Capacity, 1/4 pound
(113 gram) Accuracy
STD-1238 Indicator - Dial
STD-1278 Block - Loading, 1/8 Inch Thick, 3 Inch by 3 Inch Wood or Fiberglass
Block with Pad to Prevent Damage to the Skin.
STD-1279 Mount - Device, Mounting, Holds the Dial Indicator
D. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
324 Vertical Fin - Rear Spar To Trailing Edge
E. Procedure
SUBTASK 27-09-91-860-003
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
SURFACE BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDER,
ELEVATORS, FLAPS, SPOILERS, SLATS, AND THRUST REVERSERS CAN MOVE
QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO EQUIPMENT.
(1) Pressurize the rudder hydraulic systems A and B. To pressurize them, do this task: Rudder
Hydraulic System A, B, or Standby Pressurization, TASK 27-21-00-800-801.
SUBTASK 27-09-91-220-005
(2) Do the rudder hinge bearing and PCU bearing freeplay check (Figure 603);
(a) Make sure the rudder and rudder pedals are in the neutral position.
(b) Make sure the rudder trim indicator is at the zero unit of trim.
(c) Attach the dial indicator, STD-1238 with mount, STD-1279 at the lower end of the rudder
trailing edge.
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CAUTION: DO NOT PUT MORE THAN 50 POUNDS (222 NEWTONS) ON THE RUDDER WHEN
YOU MOVE THE RUDDER SURFACE BY AN EXTERNAL FORCE. YOU CAN CAUSE
DAMAGE TO THE RUDDER.
(d) Use a block, STD-1278 and push/pull scale 0-25 pound (0-11 kilogram), STD-753 to move the
rudder to the left side with a force of 12.0 +/- 4.0 pounds (53 +/- 17 newtons) and release
slowly.
NOTE: Apply the force approximately 6-8 inches (150-200 millimeters) from the bottom of
the trailing edge and 3 inches (80 millimeters) forward of the trailing edge.
1) Make a record of the rudder position on the dial indicator.
(e) Use a block, STD-1278 and push/pull scale 0-25 pound (0-11 kilogram), STD-753 to move the
rudder to the right side with a force of 12.0 +/- 4.0 pounds (53 +/- 17 newtons) and release
slowly.
NOTE: Apply the force approximately 6-8 inches (150-200 millimeters) from the bottom of
the trailing edge and 3 inches (80 millimeters) forward of the trailing edge.
1) Make a record of the rudder position on the dial indicator, STD-1238.
(f) Make sure the difference between the left and right positions is not more than 0.05 inch (1.3
millimeters).
1) If the difference is more than 0.05 inch (1.3 millimeters), then replace the bearings on
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