Don't be so bl**dy stupid.
Simple rule, don't take any form of mood altering substance before going flying. That includes booze, weed, Cocaine, E, Smack etc.etc.
There is no justification of any kind for taking something like E and then going flying. End of.
If he did discuss it with an AME, what do you reckon the AME's response was? Do you reckon they said "Oh that's alright then". Aye right.