WASHINGTON/TOKYO (Reuters) – Boeing Co has secured a deal worth at least $2.5 billion at list prices to sell 21 of its 737 MAX jets to Japan Airlines Co (JAL), industry sources said. The deal will be announced on Thursday, they added, after talks to renew the narrow-body fleet emerged earlier this month. Boeing declined comment. A spokesperson for JAL reiterated it was “considering this matter,” but declined further comment. The deal is slated to be the first order for the 737 MAX placed by JAL, which predominantly owns Boeing aircraft and has operated the 737-800 as its main narrowbody plane….