It's the Communicate part that was sadly lacking. Maintenance was on board the "yellow emergency" while the plane was still airborne, and should have been aware of the peril of shutting down (or losing) an engine, even if it wasn't obvious to the cockpit.
An aircrew needs sound technical backup, if not in the third seat, then on the company frequency. It would be interesting to see the internal NWA ramifications of this failure to COMMUNICATE.