The SSA and the SSF agree that adherence to this safety advisory will prevent accidents that occur as a result of improper  assembly of gliders. The SSF strongly encourages each PIC to develop a list of critical items for each glider being flown to  assist in ensuring that critical items are properly installed and secured during the assembly process.  After the assembly is completed, the pilot should conduct a preflight as recommended by the manufacturer. This preflight  ensures that all assembly has been conducted properly, and the pilot can determine if the glider is airworthy for flight.  During the preflight, it is essential that the pilot completes a positive control check. This check ensures that the glider has  been assembled correctly and that all controls are connected and secured as per the manufacturer recommendations. A-3