Document ID: chunk:federal_register_of_legislation:F2006B11190:body:0:p2
Version: federal_register_of_legislation:F2006B11190
Segment Type: other
Provision Reference: 
Character Range: 2956–5629

PROCEDURES IN THE DON LUSCOMBE AVIATION HISTORY FOUNDATION RECOMMENDATION #2, DATED DECEMBER 15, 1993; REVISED NOVEMBER 21, 1995.

               1. Remove all existing wing root fairings, wing inspection hole covers, and wing strut cover plates on both the right and left wing.

2.        Loosen the rear wing spar root attach bolts on both the right and left wings (one each wing) to permit a small wing deflection.

3.        Perform a visual inspection of the extruded rear spar aft face of the left and right wing.

4.        Inspect the face of the aft rear spar from the root to the spliced sheet metal tip spar at the wing root fairing location.

              5.         To permit removal of the wing strut, unbolt the wing strut and remove the strut

carefully.

           Note: In the location under the forward spars, support the wing half at normal height by any stable means, such as a ladder and padded lashed block. This will support the wing as the wing strut is removed. Avoid excess vertical deflection of the wing as this may stress the wing root attach point.

6.        Using suitable light and the access gained by the wing strut hole, visually inspect the front of the rear spar and the rear of the front spar for abnormal bulges or erupted spar surfaces.

7.        Remove the wing tip fairing by drilling out the rivets (using a #30 drill or smaller), and inspect the spars for abnormal bulges or erupted spar surfaces in the "U channel attach area" of each spar, and the outer lengths to the splices of the sheet metal spar extrusions.

           Note: Inspection of the front of the front spar may be performed by using the existing inspection holes and a "light trolley" on the upper aileron cable ( the illumination from the light trolley must be sufficient to provide for adequate inspection). Attach the light trolley to the upper aileron cable with a tie wrap, connect a wire or rope of suitable length to the tie wrap and use this as a means to move the light along the face of the spar.

8.        Replace rivets through the skin and front / rear spars with AN426 flush rivets to secure former, spar and skin. Install at least 6 rivnuts (3 on top / 3 on bottom) through the skin and former. Reattach wing tip fairings with #8/32 rivnuts or #8/32 x ½ machine screws, through the fairing, skin, and formers.

                 9.        Reassemble wing strut on inspected wing, protecting the root joint by avoiding excess vertical deflection. Check the lock nuts for wear and replace as necessary. Torque the strut ends and wing root bolts using the appropriate torque.

                 10.    If evidence of intergranular corrosion is