Summary
This document proposes to adopt a new airworthiness directive (AD) that would apply to all Aerotechnik s.r.o. (Aerotechnik) Model L 13 SEH VIVAT sailplanes. The proposed AD would require you to inspect the tail-fuselage hinge for strength requirements and damage, and would require you to replace any hinge with damage or that does not meet strength requirements. The proposed AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for the Czech Republic. The actions specified by the proposed AD are intended to detect and correct any tail-fuselage hinge that is damaged or has inadequate material characteristics. Any tail-fuselage hinge with damage or inadequate material characteristics could fail and result in loss of controlled flight.