A close examination of the 23 pictures on the following SA news site link shows very little evidence of charring on any of the debris. Even the tyres are unmarked. One has to conclude that a lack of motion lotion has to be high on the list of suspects, particularly in a near new Airbus with up-to-date terrain avoidance warning equipment. Even though the debris field is over 800 metres, one would expect some visible charring on a % of it, even with low fuel reserves.
A loud crash, then bodies everywhere: News24: South Africa