S 035-220
(3)
Disconnect the PCA input control rods (outboard end) at the input cranks of the left and right elevators (Fig. 509).
S 495-219
(4)
Install rig pins E/ST8 and E/ST9 in the middle PCA in the left and right elevators (Fig. 509).
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S 825-247
(5)
For the left elevator, do these steps to adjust the PCA centering springs:
(a)
Disconnect the centering springs from the middle and the outboard PCA input cranks.
(b)
Use a rubber band or cord to hold the middle PCA input crank to the inboard structure, and make sure you get these conditions to agree (View E, Fig. 509): 1) The rig pin is held tightly in position. 2) All of the freeplay is removed from the input crank.
(c)
Use a straight edge to make sure that the 3 tangent points of the middle PCA centering spring and the input crank align (View E, Fig. 509).
(d)
If the 3 tangent points do not align correctly, adjust the support clip until they align correctly.
(e)
Tighten the attachment bolts for the support clip.
(f)
Use a rubber band or cord to hold the outboard PCA input crank to the inboard structure to remove the crank freeplay (View E, Fig. 509).
(g)
Use a straight edge to make sure that the 3 tangent points of the outboard PCA centering spring and the input crank align (View E, Fig. 509).
(h)
If the 3 tangent points do not align correctly, adjust the support clip until they align correctly.
(i)
Tighten the attachment bolts for the support clip.
(j)
Remove the rubber band or cord from the middle and outboard PCA input cranks.
(k)
Connect the centering springs for the middle and outboard PCA input cranks.
S 825-248
(6)
For the right elevator, do these steps to adjust the PCA centering springs:
(a)
Disconnect the centering springs from the middle and the outboard PCA input cranks.
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757
MAINTENANCE MANUAL
(b)
Use a rubber band or cord to hold the middle PCA input crank to the inboard structure, and make sure you get these conditions to agree (View E, Fig. 509): 1) The rig pin is held tightly in position. 2) All of the freeplay is removed from the input crank.
(c)
Use a straight edge to make sure that the 3 tangent points of the middle PCA centering spring and the input crank align.
(d)
If the 3 tangent points do not align correctly, adjust the support clip until they align correctly.
(e)
Tighten the attachment bolts for the support clip.
(f)
Use a rubber band or cord to hold the outboard PCA input crank to the structure to remove freeplay (View E, Fig. 509):
(g)
Use a straight edge to make sure that the 3 tangent points of the outboard PCA centering spring and the input crank align.
(h)
If the 3 tangent points do not align correctly, adjust the support clip until they align correctly.
(i)
Tighten the attachment bolts for the support clip.
(j)
Remove the rubber band or cord from the middle and outboard PCA input cranks.
(k)
Connect the centering springs for the middle and the outboard PCA input cranks.
S 435-249
(7)
Connect the PCA input control rods back to the input cranks of the left and right elevators (Fig. 509).
S 825-246
(8)
If you can not easily connect the PCA input control rods, adjust the control rods with the instruction given in the PCA Input Control Rod Adjustment paragraph.
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