"Some blame faulty hyraulic system, others a deep pothole on 18L.
This gives a total of 5 overruns in 2 months."
If I were a gambler, I would opt for a pothole. If I drove heavy Iron and there was no pothole, I would see to one being dug before the boss found out I had broken his airplane.
5 in 2 months, as most here will say, "Yea, but its Africa." As if its expected that the accident/incident rate is acceptably off the scale.