AD #: 2020-16-51 was issued 7/23/2020. It is an Emergency Airworthiness Directive. You can look it up for more details but basically there were four recent reports of single-engine shutdowns due to engine bleed air 5th stage check valves being stuck open due to corrosion in storage of Boeing 737. Corrosion of these valves on both engines could result in a dual-engine power loss without the ability to restart.
More delays? More layoffs? Longer wait for return to work for GE employees?