In March, the ICAO's warning led several countries in the region to issue a ban on new flights from Thailand and increase scrutiny of its planes. "We've already had Korea, China and Japan place restrictions on new Thai flights. Singapore, Australia and the EU ordered enhanced inspections," says Polivnick. "Whether this will prompt them to call for further inspections or create further restrictions on Thai airlines remains to be seen, but there's nothing to stop them from doing that. It's within each country's power to do that." Polivnick says it's the regulator -- not individual airlines -- that the ICAO is looking at.