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2) Adjust the dial indicator, STD-1238 to zero.
(f) Use a block and a force gauge, COM-1557 to push down on the top of the elevator tab with a
force of 10.0 +/- 0.2 pounds (44.5 +/- 0.9 newtons).
NOTE: Apply the force on the elevator tab at the trailing edge, as close as possible to the
tab hinge 2 centerline.
1) Make a record of the travel shown on the dial indicator, STD-1238.
2) Slowly remove the force.
(g) Push up on the bottom surface of the elevator tab with a force of 10.0 +/- 0.2 pounds (44.5
+/- 0.9 newtons), directly below the force applied before.
NOTE: Do not adjust the dial indicator.
1) Make a record of the travel shown on the dial indicator, STD-1238.
2) Slowly remove the force.
(h) Make sure the sum of the two travel records is not more than 0.030 inch (0.72 millimeter).
1) If the sum of the two travel records is more than 0.030 inch (0.72 millimeter), check the
hinges for excessive wear and replace, as necessary.
(i) Remove the dial indicator, STD-1238.
(j) Remove the mounting plate.
(k) Do the same check on the tab of the opposite elevator.
H. Do a Check of the Elevator Tab Hinge Axial Freeplay
SUBTASK 27-31-32-220-005
(1) Do a check of the elevator tab hinge axial freeplay (Figure 603):
(a) Remove pressure from the elevator hydraulic systems A and B. To remove the pressure,
do this task: Remove Pressure from the Elevator Hydraulic Systems A and B,
TASK 27-31-00-800-802.
(b) Make sure that the flaps are retracted to the full up position.
(c) Make sure the stabilizer is set at 4.0 +/- 0.5 units of trim.
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CAUTION: BE VERY CAREFUL WHEN YOU INSTALL THE WOODEN BLOCK. IF YOU USE
MORE THAN HAND PRESSURE TO INSTALL THE WOODEN BLOCK, YOU CAN
CAUSE DAMAGE TO THE ELEVATOR OR TAIL CONE.
(d) Keep the elevator from moving by installing a wooden block between the inboard edge of
the elevator and the tail cone (Figure 603).
NOTE: Be sure to cover the wooden block with duct tape or equivalent so that you do not
damage the paint of the elevator or tail cone.
(e) Do these steps to make sure the axial play (inboard - outboard direction) of the tab is not
more than 0.036 inch (0.91 millimeter).
1) Hold the elevator tab at the trailing edge and move it outboard using hand pressure.
2) Use a 0.0 - 0.5 Inch feeler gauge, STD-1107 or a dial caliper, STD-1303 to measure the
clearance between the elevator and the outboard end of the elevator tab.
NOTE: It may be necessary to insert a flat metal filler block between the elevator and
the elevator tab to help in this measurement.
a) Make a record of the clearance dimension.
3) Hold the elevator tab at the trailing edge and move it inboard using hand pressure.
4) Measure the clearance between the elevator and the outboard end of the elevator tab.
a) Make a record of the clearance dimension.
5) Make sure the difference between the two measured clearances, or the axial freeplay,
is less than 0.036 inch (0.91 millimeters).
(f) Do the same check on the tab of the opposite elevator.
I. Do a Check of the Elevator Tab Hinge Line Freeplay
SUBTASK 27-31-32-220-006
(1) Do a check of the elevator tab hinge line freeplay (Figure 603):
(a) If necessary, remove pressure from the elevator hydraulic systems A and B. To remove the
pressure, do this task: Remove Pressure from the Elevator Hydraulic Systems A and B,
TASK 27-31-00-800-802.
(b) Make sure the stabilizer is set at 4.0 +/- 0.5 units of trim.
(c) Make sure the flaps are retracted to the full up position.
CAUTION: BE VERY CAREFUL WHEN YOU INSTALL THE WOODEN BLOCK. IF YOU USE
MORE THAN HAND PRESSURE TO INSTALL THE WOODEN BLOCK, YOU CAN
CAUSE DAMAGE TO THE ELEVATOR OR TAIL CONE.
(d) Keep the elevator from moving by installing a wooden block between the inboard edge of
the elevator and the tail cone (Figure 603).
NOTE: Be sure to cover the wooden block with duct tape or equivalent so that you do not
damage the paint of the elevator or tail cone.
CAUTION: BE VERY CAREFUL WHEN YOU INSTALL THE MOUNTING PLATE. THE ELEVATOR
IS MADE OF COMPOSITE MATERIALS. THE MOUNTING PLATE CAN CAUSE
DAMAGE TO THE ELEVATOR IF YOU ARE NOT CAREFUL.
(e) Attach a mounting plate to the elevator at the centerline of hinge number three.
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