Byelorussia have phased out Su-24 because they don´t find out any enemy. All there Su-27 are also know grounded.
Only airplanes in use is the MiG-29 and Su-25. Some MiG-29 are know modernised.
The Russian radars P-18 are know replaced by Byelorussia radar producer.
See
en.ria.ru/world/20130219/179570630/Belarus-Phases-Out-Russian-Warplanes-Radars.html