Attackers have purportedly contaminated Boeing with the WannaCry PC infection - raising feelings of trepidation traveler jet software could be hacked.
One of the organization's main designers is said to have conveyed an update requiring "all hands on deck" after the obvious assault.
Mike VanderWel, chief engineer at Boeing Commercial Airplane production engineering, said: “It is metastasising rapidly out of North Charleston and I just heard 777 (automated spar assembly tools) may have gone down."
He also writes in the alarming memo, seen by the Seattle Times, that he is concerned the virus will hit equipment used in functional plane tests and potentially “spread to airplane software.”
Mr VanderWel also said: "We are on a call with just about every VP in Boeing."
He also emphasised that a “battery-like response” was needed, referencing a 2013 battery fire which hit 787 Dreamliner planes.
Boeing later issued a statement downplaying the hack.
It said: “Our cybersecurity operations centre detected a limited intrusion of malware that affected a small number of systems.