“We’ve done a final assessment,” said Linda Mills, the head of communications for Boeing Commercial Airplanes. “The vulnerability was limited to a few machines. We deployed software patches. There was no interruption to the 777 jet program or any of our programs.”

Earlier in the day, when the cyberattack struck, the reaction was anything but calm.

Mike VanderWel, chief engineer at Boeing Commercial Airplane production engineering, sent out an alarming alert about the virus calling for “All hands on deck.”

“It is metastasizing rapidly out of North Charleston and I just heard 777 (automated spar assembly tools) may have gone down,” VanderWel wrote, adding his concern that the virus could hit equipment used in functional tests of airplanes ready to roll out and potentially “spread to airplane software.”