Boeing to cut 737 Max production beginning in mid-April

[Sgent]

9. I think the aircraft could be returned to service

fairly easily.

Remove the MCAS. Train pilots on the new airfoil / envelope rather than trying to make it fly like a 737NG. The MCAS was only intended to go into effect in one very particular part of flight which is unusual anyway -- hard turns during a circle to land or similar.

That will cost them as they lose commonality with pilot training, but its a safe (if antiquated) design.

Note: That assumes that the 737NG design is not found deficient. There are some rumblings that at least the ET flight may have been partially caused by a heretofore latent defect / design flaw with the manual trim cable.