https://www.theregister.co.uk/2019/04/02/boeing_737_max_updates/

Boeing yesterday warned it will take longer than expected to overhaul the anti-stall system in its 737 Max aircraft, the infamous safety mechanism that likely caused two deadly crashes.

Both the manufacturer and America's aviation watchdog, the FAA, said the deployment of a software update for the airline jets' Maneuvering Characteristics Augmentation System (MCAS), to improve the component, will be delayed as engineers continue to work on it.