And the RD-0211 engine №5355365421 operated at 51% on Proton-M №535-13. Don't sound good.
Which launch was that? I know the other one was Ekspress AM-2, but I'm not sure about the Proton-M.
Proton-M №535-13 was AMC-23, launched on 29.Dec.2005.
source: Gunter Krebsī webpage - skyrocket.de