This Z-37 is in better shape since the last time I saw it as it now has wings, a tail and an engine. The wings likely came from OK-RJJ.

One of quite a few nice gliders to be seen at LKBU that day.

The third use of SP-ANL. Built in 1973, registered with the Aeroklub Bialystok from December 2003 and cancelled as sold in Czechia in January 2012. Stored at Bubovice for several years in a declining state of repair and still present being worked on in 2021.

Built 1987; ex G-TONS, LN-TFA, SE-LBA, LN-TFA, G-7-121. With Aviaticky klub, s.r.o. as OK-RAW since 12.7.2016

Operated by the Aeroclub Beroun

This Colt was first registered to Aeroklubu Polskiej Rzeczypospolitej Ludowej (APRL) in July 1073 and had joined Aeroklub Bialystok by December 2003. The frame is pictured being dismantled at Bubovice (probably) for spares to keep other An-2s flying.

It doesn't look much but this Z-37 is in a bit better condition that previous photos on the web. There were guys working nearby on an An-2 so maybe this is slowly being put back together. The set of wings to the right belonged to OK-RJJ, possibly they are there to be mated to this hulk. Operated by Air Special

Pictured parked on the grass at LKBU.

Only two RT-versions (radiotechical) of the Crate flew with the Czechoslovak AF. This example served from March 1959 with 47. pzlp (reconnaissance air regiment) at Mlada, then to 10. prtlo (anti-radiotechnical air detachment) at Prerov and then back to 47. pzlp, which had in the intervening period moved to Pardubice. The frame was retired 1965 and has been preserved at LKBU, as the only surviving RT since 1986.

This 410 was originally delivered to the Aeroflot - West Siberia directorate in June 1985 and subsequently transferred to Novosibirsk Avia in March 1994. It was imported (back) to the Czech Republic in 1999 and was to be overhauled by Let for Olimex, however, the latter went bankrupt and the frame went into storage. It was hauled to LKBU in October 2011 with the intention to make it airworthy again. Looks like this didn't happen!