SAA to replace fleet by 2020

[Joseph Saragozza.]

i didnt think that this would be happening so quickly.
http://www.flightglobal.com/articles/2008/11/18/319008/south-african-airways-plans-to-replace-entire-fleet-by.html

do you think the will lease them again or purchase them?

[Shameel Kumar]

Yikes! One manufacturer to replace their entire narrowbody and widebody fleet. Looks like Airbus will be the favourite here. A320s for the narrowbody fleet, and probably a mix of A350 -800, -900 and -1000 aircraft for their widebody fleet.

Just curious though, I know there's some issue with 77Ws operating out of JNB. Something to do with the airport's altitude. Could anyone provide a bit more 'scientific' explanation for this ? ... and also if the 787 and A350 would suffer the same problem since they are also long-range twins?