AD/ENG/4 Amd11 does not recommend oil changes, it requires them to be done.
Hey Socket
Thanks for that update.
Been working out of country for a while.
That means it is mandatory - no way around it.
And Mr_Pilot - there is a very good reason for changing oil when it is at operating temperature, other than to annoy the LAME!! Think sludge, condensation etc.
Blackhand