Preliminary data based on the notification from the South African authorities:
On Friday morning at approximately 05:50 UTC, a Falcon 900 with 3 crew and 7 passengers onboard begun the descent in to FVFA on a flight from FVRG. On passing FL250, the crew experienced various warning lights on the flight deck coupled with smoke, which started filling up the cockpit. The crew carried out the necessary actions as required in the AFM and broadcasted a mayday call. The crew expedited the descent and carried out a normal landing with no further anomalies.