By Abhijith Ganapavaram, Allison Lampert and Matt McKnight (Reuters) -Boeing shares rose 3% on Monday on hopes of an end to a crippling strike, although some analysts questioned whether a proposed labor contract unveiled over the weekend would muster enough support from the U.

Spirit AeroSystems Holdings Inc. will start furloughing workers later this month in response to the continuing strike at Boeing Co., the aerostructure supplier’s biggest customer.

Production of Boeing's 767 and 777 widebody jets was halted during the strike by more than 33,000 West Coast factory workers that started on Sept. 13.