Boeing CEO Dave Calhoun said he’s ready to cancel the 737 MAX 10 program if Congress doesn’t extend a regulatory deadline that would allow the jet to enter service without an upgrade to the 737 crew alerting system. Canceling plans for the largest member of the MAX family — which has about 640 orders with prospects for more, including from Delta — would be a big blow to the MAX program that would curtail future job growth at the Renton assembly plant. It would leave Boeing with no viable competitive plane against the successful Airbus A321neo. Calhoun made the declaration, which is clearly aim…