It is "extremely unusual" for a commercial aircraft to land at a military air base.
"This is not something that normally happens at military air bases," said defence analyst Helmoed Heitman.
"Arrangements are made to receive commercial aircraft such as [for] heads of state or VIPs as was the case during the Soccer World Cup," he said.
Another expert said this was "highly irregular".
"It appears to be in serious violation of numerous military protocols.
"The protocols exist at Air Force base Waterkloof for the handling of civilians such as heads of state, which none of the more than 200 passengers were.
"Serious questions need to be asked and people such as the defence minister need to be held accountable," said the analyst, who asked not to be named.
"The Air Force is not an independent arm of the Defence Force. Its chief would have received instructions from his chief - in this case the SANDF chief, General Solly Shoke - who would have received instructions from his chief, the minister of defence. It's that simple, and if they say otherwise they are lying."
02/05/13 Graeme Hosken and Schalk Mouton/Times Live, South Africa
