NEW : He most likely had food poisoning or the flu , Boeing says . Flight 473 from Los Angeles to Seattle was diverted to Portland , Oregon . The first officer has been with the airline for 11 years . The captain lost consciousness immediately , Alaska Airlines says . First officer took over the flight , the airline says .
NEW : He most likely had food poisoning or the flu , Boeing says . Flight 473 from Los Angeles to Seattle was diverted to Portland , Oregon . The captain lost consciousness immediately , Alaska Airlines says . First officer took over the flight , the airline says .