For US residents:
I'm almost certain there's a tax treaty between the USA and Belgium / EU.
You can take a credit for Belgian taxes paid on your 1040 form 1116. Consult an accountant, though. There's a treaty with India, so there'd almost HAVE to be one with Belgium. There's also an income exclusion, but with limitations.
India issues a letter of authorization to expats (FATA). Seems to be accepted everywhere I've been (although 98% of my flying is India domestic). I think CAE has a simulator in Brussels, and I've seen ads at other sim centers for type training to DGCA requirements, so it SHOULDN'T be a big issue.
All just an opinion. Your mileage may vary ...
