For whatever it's worth, I was also non-typed and I was flying the line after 2 months, ymmv.
You could also qualify for Income Tax Exclusion (not evasion,Lol!) even if you don't spend a full year outside of U.S., it would have to be pro-rated though.
Give this a read, good info regarding taxes for US expats.:
http://www.irs.gov/pub/irs-pdf/p54.pdf
During training you will get paid basic salary, transportation allowance and housing allowance (first monthly housing allowance depends on whether you choose to stay on company accommodation for the first 30 days or whether you wish to find your own accommodation from the get-go and instead collect the full housing allowance at the beginning of your second month ...). The only pay you will not receive during training is your flight pay, for obvious reasons.