Russia's flag carrier Aeroflot has signed an agreement with Volvo's engine division to renovate the engines of the company's four DC 10-40F three-engine cargo jetliners.

The contract worth 600m kronor ($57m, �40m) is the largest overhaul contract signed by Sweden's Volvo Aero since 1998.

It includes spare engine support, engine condition monitoring and on-wing support.

The contract can be doubled if Aeroflot decides to buy more planes of the type.

The Russian-built Il-76 jetliner is currently the backbone of Aeroflot's cargo fleet, but the number of Western-built planes might increase in the future as the company is forced to adopt EU regulations on airplane noise.

Aeroflot is the world's 56th-largest carrier by revenue and dominates in Russia and East European markets.