Under the Hercules C-130 availability contract, performance is measured in terms of aircraft available for operations averaged across each calendar month. Spares availability is not measured.
For Tornado, the current figures for spare demands satisfied are 97 per cent. for the Tornado F3 and 98 per cent. for the Tornado GR4, as recorded on 29 February 2008.
Aircraft spares for Typhoon are partly provided direct from industry and partly by the MOD through an international contract. These arrangements are being built up as the RAF fleet grows and demands satisfied from MOD stocks average 68 per cent. as recorded on 29 February 2008.