Mad (FLT) Scientist is indeed correct. I raised the same question with my instructor at Alteon during initial. His response was that it was not deemed necessary to test the aircraft in any flap configuration above FL200. As such FL200 is the max alt with flap. Incidently I do recall during initial on the GIV that it was not considered safe to configure with flap above FL200 as it caused a disrupted airflow over the engines. FL200 being the limit on it as well. Given that, would it be fair to conclude that Gulfstream did test the aircraft in various configurations above FL200?
SP