UPDATE 2-U.S. airlines sending teams to review Boeing 737 MAX upgrade this weekend

The three U.S. airlines that own Boeing Co’s 737 MAX are meeting the U.S. manufacturer this weekend to review a software upgrade for the jet that has suffered two fatal crashes in five months, officials from the airlines told Reuters. The meetings are a sign that Boeing’s planned software patch is nearing completion, though it will still need regulatory approval. Southwest Airlines Co, American Airlines and United Airlines operate 34, 24 and 14 MAX jets respectively.