Seen during a 2 hours transit on 01jun2014:
at JAT-Teknik were 5 all-white 733's and 3x 727-200 (one still in JAT livery): unable to read registrations from the Terminal.
Below JU should be read as Air Serbia (and not JAT):
OE-LPZ GLEX
YU-APC 319 JU
LZ-FNA Citationjet
YU-AJM M80 wfu/engineless with "Aerodrom Nikola Tesla" text
YU-BTC Kingair350
YU-... 733 CAL (Aviogenex c/s)
YU-AND 733 Aviolet
YU-ANP 732 Westair Benin (with Aviogenex logo next to door)
YU-ALN AT7 JU
YU-ALO AT7 JU
YU-ALU AT7 JU
A6-EID 319 EY
A6-SAB 319 JU
HA-LWG 320 Wizzair
HA-LWI 320 Wizzair
YU-SVL citation
UR-CAF AN-12 Shovkoviy Shilyah Ltd (if I saw this correctly)
YU-ANI 733 a/w
YU-ANJ 733 a/w
YU-AOV 733 a/w
all 3 were operational
YU-APC 319 JU
YU-APE 319 JU