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MISCELLANEOUS AIRWORTHINESS INFORMATION - ES 59 ARROW

1. Control Column Ball Joint. The Ball joint at the base of the stick is prone to wear and if the wear is excessive the stick may pull out of the pivot or push through the lower plate which reduces available control travel. One possible solution is to re-manufacture the ball joint in accordance with Drawing 1. The GFA in conjunction with the owners of a ES 60 Boomerang is developing a new junction similar to that which is fitted to the K7/K13 sailplanes. When this Mod is completed this AN will be updated to provide drawings of the Mod. 2. Airbrake Foot Control. GFA Mod 88/2-2 describes the optional installation of a foot controller for the airbrakes to aid disabled pilots. 3. Front Skid. The plywood and structure around the front skid is prone to breakage when the sailplane noses over on landing and should be carefully inspected at each annual inspection. 4. Main wing fitting cracks. A number of cases have been reported of cracking of the main win attachment fittings on both the fuselage and the wing at the places shown in Figures 1 and 2. If these cracks are found then the cracks should be ground out and re-welded.