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MISCELLANEOUS AIRWORTHINESS DIRECTIVES - ASH 25, ASH 25 E & ASH 25 M 

ASH-25 - Schleicher ASH-25 Technical Note No 16 describes the optional installation of CFRP pushrods in the wings.
Schleicher ASH-25 Technical Note No 17 describes …winglets?
Schleicher ASH-25 Technical Note No 18 describes…5 items?
Schleicher ASH-25 Technical Note No 19 describes the optional installation of a power-plant with electronic fuel injection for new-build aircraft or as retrofit.

ASH 25 E - Schleicher ASH-25E Technical Note No 14 describes the optional installation of CFRP pushrods in the wings.
Schleicher ASH-25E Technical Note No 18 describes…winglets?
Schleicher ASH-25E Technical Note No 19 describes…5 items?
Schleicher ASH-25E Technical Note No 20 describes the optional installation of a power-plant with electronic fuel injection for new-build aircraft or as retrofit. 

ASH 25 M - Schleicher ASH-25M Technical Note No 14 describes the optional installation of CFRP pushrods in the wings.
Schleicher ASH-25M Technical Note No 16 describes the option of fitting a new propeller, Schleicher AS2F1-1/R153-92-N1.
Schleicher ASH-25M Technical Note No 17 describes the optional installation of a fixed re-fuelling system in the fuselage.
Schleicher ASH-25M Technical Note No 20 describes the optional installation of a power-plant with electronic fuel injection for new-build aircraft or as retrofit.