[volare737]

The Flexjet was told to hold short of 31C (the active). The acknowledgment from the Flexjet to the tower was incorrect Ground control corrected the Flexjet, and told the jet to hold short of 31C. The Flexjet never acknowledged and did not stop.

[pfflier]

That one's all on the Flexjet. The tower didn't command a go around though. The speculation is that they were preparing to warn the Southwest flight of a runway incursion.

Don't know about that though, sounds like CYA until proven otherwise.

[zipper]

The FlexJet did read back the hold short instruction, on their 2nd try. Their 1st reply was wrong and the controller made him read it back properly.