As often seems to happen, this thread seems to have wandered away from the points at issue.
Why was an aircraft (which is almost certainly not airworthy) allowed to operate a charter flight on behalf of the UN/US government/whoever and kill 4 crew and 7 passengers (who almost certainly should not have been allowed on board) by crashing in as yet unexplained circumstances.
There will not be any proper investigation, certainly no report from the Sao Tome AAIB and there will be many more repeats of these appalling crashes.
One can only hope that the lawyers acting for the bereaved families may discover some of the facts and the powers that be in Rome and Washington may one day properly enforce their own rules on which carriers they use.