you don't need a visa for CPL either, just ME and IR
I thought any training resulting in a licence, the pilot has to have a visa (PPL, IR, CPL, ME, FI, ATP). Not for time building !!!
"Officials" like things in writing...If you are going to a flight school for time building, I suggest that you obtain a letter from the Chief Pilot explaining the purpose of your trip, with a friendly reminder for the TSA agent (who sometimes forget their own rules
) that this is not a training therefor no visa is needed.
Happy Flying,
Chti17