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2) Balancing check must be performed with the control surfaces in the same configuration as on the aircraft, i.e. painted, equipped with the tabs and free from foreign matter. 3) If a control surface is to be repainted, strip the former paint. If painting operation is properly made, the control surface will remain within the required balancing limits. 4) Install the balancing posts on a horizontal and flat bench. The posts should be at 90° with respect to the hinge bolt axis. 5) If necessary, equip the control surface with its hinge bolts. C. Aileron balancing check procedure (Figure 602) 1) Install aileron template (1) on scale (2), then zero the scale. 2) Install aileron (3) on balancing posts (4), the aileron resting on the hinge bolts (two operators are required). 3) Position the aileron trailing edge on aileron template (1). 4) Measure the distance between the hinge axis and aileron template (1) (horizontal chord). It must be equal to 10.39 in (264 mm). Adjust aileron template (1) position if necessary. 5) Perform the weighing (Am) and calculate the balance moment which must be : - Aileron Mt (in.lbs) = 10.39 (in) x Am (Ibs) - Aileron Mt (mm.kg) = 264 (mm) x Am (kg) ABAA Validity : S / N 1 - 9999 51-60 00Page 601 (CA) OCT 02 6) Check that the value of the balance moment is within the permissible tolerances. CONTROL SURFACE BALANCE MOMENT Min. Max. mm.kg in.lbs mm.kg in.lbs Aileron 40 3.47 60 5.2 7) Re-adjust the aileron balancing if necessary - refer to Paragraph 2. |
