Russian airline Aeroflot says prosecutors are inspecting its Moscow headquarters and the offices of two subsidiaries following the weekend crash of a Boeing jet that killed 88, reported ap. Regional prosecutors spokeswoman Yelena Velikova says investigators made the checks Wednesday to ensure the airline and its subsidiaries are complying with federal safety rules. Investigators have said a faulty engine appears to be to blame for the crash Sunday of the Boeing 737-500 in the Ural Mountains city of Perm. The jet belonged to Aeroflot-Nord. The crash was Russia's worst air disaster in two years. News reports say the pilot may have ignored commands from air traffic controllers as the plane was preparing to land early Sunday.