Brief Description: Cable guards installed, according to Service Bulle
GlaStar / Sportsman Service Bulletin 63- MANDATORY Note: This service bulletin supersedes Service Bulletin 47. The service bulletin applicability was updated to include Sportsman kits. No other changes were made Subject: Control Cable Safety Guides Applicability: All GlaStar and Sportsman kits Discussion: During flight on a customer’s aircraft, the pilot initiated a series of banks using the ailerons to quickly reverse the roll. With the aircraft rolling one way and the ailerons quickly moved in the opposite direction, one aileron control cable jumped a pulley leaving the pilot in a dangerous situation with limited controllability of the aircraft. Fortunately he was able to land safely. Upon investigation, it was determined that the cable jumped the pulleys in the outboard pulley group in the wing even though the pulley had guides. For this reason, we are recommending all GlaStar and Sportsman kit owners inspect their complete control systems and make the following prescribed changes if your system is not per the following listed specifications. The sole purpose of the cable guards is to keep the control cable retained on the pulley. All cable control systems have some inherent flexibility or stretch within the system and when one cable is loaded up with flight loads, the other cable will unload and can even go slack. It is on the slack cable that the guard will prevent the cable from falling off and becoming a dangerous situation. Guards can be accomplished is several ways ranging from the use of cotter pins, clevis pins, bolts or other structure. The GlaStar and Sportsman uses several types depending on accessibility. Regardless of the type, the important point is that the clearance between the pulley and the guard never exceed the maximum limits. All the cables in the primary control system are 1/8 inch diameter flexible wire rope. In some cases the GlaStar and Sportsman Assembly Manual prescribes the maximum clearance limits between the edge of the guide and the o
