MOSCOW, August 26. /ITAR-TASS/. Russia's Roskosmos Space Agency said on Tuesday the first launch of the Proton booster after the May accident is scheduled for September 28.

“The booster rocket with the Briz-M accelerator unit is to put a Luch relay satellite in orbit,” the Roskosmos told ITAR-TASS detailing the upcoming launch of the Proton technology rocket which has remained grounded since May 16.

On Tuesday, Khrunichev Space Center specialists were installing screen vacuum insulation on Briz-M which is to put the satellite in parking orbit. Simultaneously, efforts were underway at launch pad # 81 to prepare the ground-handling equipment.

The Proton-M boost carrying the Express-AM4P communication satellite burnt in dense layers of the atmosphere on May 16. The experts investigating the accident said it was caused by disintegration of a bearing assembly in the turbo pump of the third-stage engine.