It is, I went with a group of fellow students to Executive Turbine on the South of the Runway (the main PT6 Service facility in Africa) as well as Nationwide & a major small commuter operator (across the apron from Nationwide, think it was Rossair) preparing Airquairius F28s. We arranged our own visit, the school was Kack.
Nationwide has a BAC1-11 Sim in its building.
You might see several 1-11s & an ex Parcelforce Viscount where the hulks are left to rot.
If I remember rightly, there is a pleasure flight on Sunday Mornings over Pretoria & Jo'burg from Lanseria in either a DC3 or DC4 (saw them all the time) with a shampoo breakfast included.
Need any more info I'll help if I can.
FB