The issue here isn't using google chat, the accusation is that this was Spirit and Boeing conspiring to not record these in the proper work order system under the pretence that this work was being done by Spirit as-if-it-were pre-delivery.
And then this from the doc: "The investigation continues to determine what manufacturing documents were used to authorize the opening and closing of the left MED plug during the rivet rework."
But isn't that exactly the underlying fraud? Boeing and Spirit are conspiring to cover up Spirit's deficient delivery by allowing Spirit to work onsite at Renton and do post-delivery re-work and pretend that it is as-if delivered, and _outside_ Boeing's system of record. To reject the delivery and wait for Spirit to fix would ruin their delivery schedule, so they fudge it and muddle along.
Consequently, you have a system of record that a major party to work doesn't have access to.
As we've all seen, this leads to "actual coordination" being instead done in a system all involved parties do have access to (SAT).
Which inevitably leads to a desync between CMES (SOR by fiat) and SAT (SOR in practice).