With reference to the refurbishment of the Beechcraft King Air B200 by ExecuJet Aviation Group which was handed over to the SA Air Force on 30 June 2015, (a) what (i) were the reasons why the specified aircraft required refurbishing, (ii) was the nature of the refurbishment and (iii) were the total costs of this refurbishing and (b) prior to the refurbishment, (i) when last was this aircraft refurbished and (ii) when is the next refurbishment scheduled to take place?