[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.

[pfflier]

Blancolerio has all the voice data online now. It appears that maybe the Bizjet mistook 31 Center for 31 Left although that is a stretch for me to believe particularly, since the pilots should be looking at the plates.

https://www.youtube.com/watch?v=m6BLyJ2QiFY

[volare737]

If he did read it back the second time correctly (and I haven’t seen that anywhere), then the pilot had no idea where he was on the field.

[volare737]

Just heard the second read back, the pilot did not know where he was on the field then. There is no other explanation for not holding short of 31C.