Piper Arrow IV, Maintenance Manual

Page: 251 / 752

5. Connect the ends of the primary and balance control cables to the bellcrank using bolts, washers, nuts
and cotter pins. Allow the cable ends to rotate freely on the bellcrank.
6. Tighten the control cables at the balance cable turnbuckle in the floor opening aft of the main spar.
Check cable tension per Rigging and Adjustment of Aileron Controls.
7. Install the access plate on the underside of the wing and replace the floor panel or rear seat bottom.
RIGGING AND ADJUSTMENT OF AILERON CONTROLS. (Refer to Figures 27-5 and 27-6.)
—NOTE—
Flap adjustment must be complete before starting aileron
adjustment.
1. To check and adjust the rigging of the aileron controls, first set the right and left aileron bellcranks at
neutral position. (Ascertain that the control chains have been rigged per Installation of Control Column
Assembly.) This may be accomplished by the following procedure:
A. Remove the access plate to each aileron bellcrank located on the underside of the wing, forward of
the center of the aileron by removing the plate attaching screws.
B. Affix a bellcrank rigging tool, as shown in Figure 27-5, between the forward arm of each bellcrank
and the adjacent rib. (This tool may be fabricated from dimensions given in Chapter 95.) The
slotted end of the tool fits on the arm forward of and adjacent to the primary control cable end.
The other end of the tool is positioned so that the side of the tool contacts the aft side of the
bellcrank stop. The bellcrank must be moved to allow a snug fit of the tool between the bellcrank
arm and rib. To do so, it may be necessary to loosen a primary control cable or the balance cable.
Neutral position of the bellcranks is the position at which the forward and aft cable connection
holes are an equal distance from the adjacent outboard wing rib.
2. With each bellcrank set at neutral, the ailerons may be checked and adjusted for neutral as follows:
A. Ascertain that the bellcrank rigging tool fits snug between the bellcrank and the rib.
B. Place an aileron rigging tool as shown in Figure 27-6 against the underside of the wing and aileron
as close as possible to the inboard end of the aileron without contacting any rivets. The tool must
be positioned paralleled with the wing ribs, with the aft end of the tool, even with the trailing edge
of the aileron. (This tool may be fabricated from dimensions given in Chapter 95.)
C. With the aileron control rod connected between the bellcrank and aileron, check that the surface of
the wing contacts the tool at its forward surface and at the spacer, and the trailing edge of the flap
contacts the aft end of the tool. The aileron is neutral at this position.
D. Should the three points not contact, loosen the jam nut at the aft end of the control rod and rotate
the rod until the three points contact. Apply a slight up pressure against the trailing edge of the
aileron while making this adjustment. After adjustment, retighten the jam nut.
3. Adjust primary and balance cable tension as given in Figure 27-4 by the following procedure:
A. Remove the two front seats and, if desired, and the bottom of the rear seat to facilitate in the
necessary operation.
B. Loosen the connecting bolts of the idler cross-over sprockets at the control tee bar to allow the
chain to fit snug around the control wheel sprockets and over the idler sprockets.
C. Ascertain that both bellcranks are at neutral position.
27-10-05
Page 27-16
Revised: August 8, 1984
1K11
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL