As the law/regulation is currently written, yes, exceeding 400' AGL, in uncontrolled (class G) airspace, would be a violation of applicable FAR/CFR's.

Unless prior arrangements with the local FAA FSDO/ATC facility were made to allow exceeding 400' AGL.

This is why my 25% Stearman and my DP Ultimate 120 will stay parked in the shop. I'm not willing to risk a violation which could also effect my ATP (and by extension my livelihood).

R_Strowe
Proud member of the 5-digit "Nobility"

PS: I would have responded sooner. Been busy pushing a '76 around the country.