Built in 1963 as Zlin Z-326 OK-SND and later rebuilt as the prototype Zlin Z-526. Became HA-TRY in 1967 and was sold in the USA in 1987 as NX526ZG and later N526ZG. Spent many years parked in the open at California City Municipal (L71) before being cancelled from the US register in July 2013.

This aircraft was originally built as Zlin Z.326 OK-SND, but was later rebuilt as the prototype Zlin Z.526 and became HA-TRY before being sold in the USA as N526ZG; it was cancelled from the US register on08-07-2013.