The Russian MoD has released a tender with a selected
supplier to upgrade Su-25 attack aircraft to the significantly enhanced
Su-25SM3 standard for day/night operations, which boasts a new-generation
self-protection suite.
The upgrade budget is Roubles 2.8 billion (equating to $43 million) and covers most likely up to eight aircraft, with the handover
of the last of them set for November 2021.
The previous upgrade tender, covering four aircraft,
was held in September 2018; its budget was set at Roubles 1.7 billion. All
Su-25SM3 upgrade works, combined with aircraft and engine overhaul and life
extension, are being carried out by 121