's earnings debut as chief executive officer has gained an element of suspense as workers vote on the same day whether to accept the planemaker's latest proposal and end a five-week-long strike.

Boeing and the union representing 33,000 striking members hammered out a tentative new accord that notches up pay by 35% over four years, an unprecedented wage increase.

But the hourly workers have the final say with their Oct. 23 vote, and approval is far from certain. They overwhelmingly rejected a deal in September that had labor leaders' blessing. This time, union negotiators around ...