A very good post Mungo and there has also been some very informative posts as well.
As I understand the law a SA Part 121 operator has to have a wet lease agreement approved by the SACAA. ASI, as stated earlier, operates in accordance with FAA Part 91.
I doubt whether any SACAA inspector will allow Operational Control to be transferred to a Part 91 operator; the requirements are light years apart.
Operational Control cannot be transferred.
If the SA Investigators are allowed to investigate this accident then I am sure they will dig deep into the paper work............
I am truly sorry for those out there who have suffered a loss.