Wall Street’s main indexes fell in choppy trade on Monday, as rising tensions over the Russia-Ukraine conflict weighed on megacap stocks and Boeing shares fell after a 737-800 jet crashed in China. Russia’s foreign ministry said it had summoned U.S. Ambassador John Sullivan to tell him that remarks by President Joe Biden about his Russian counterpart Vladimir Putin had pushed bilateral ties to the brink of collapse. Technology and consumer discretionary shares fell the most after a solid rally last week. Megacap growth names Alphabet Inc., Amazon.com, Microsoft Corp., and Meta Platforms were down between 0.7 and 3.5 percent. Boeing’s 5.7 percent slide weighed the most on the blue-chip Dow after a China Eastern Airlines jet with 132 passengers crashed in the mountains of southern China. U.S.–listed shares of China Eastern Airlines slumped about 8.2 percent. Parts suppliers Spirit AeroSystems Holdings Inc. and Hexcel Corp. were down 5.6 percent and …