All air cargo will be flying again from today with the lifting of restrictions on loads for export. But many containers will still have to be handled at Kai Tak. The main handler, Hong Kong Air Cargo Terminals Ltd (HACTL), hopes to shift all operations to its new SuperTerminal 1 at Chek Lap Kok by the end of this month. Yesterday, about 80 per cent of cargo was handled there. The opening of the new airport led to a cargo crisis when HACTL's computers crashed and shipping records were lost. Today's resumption comes 39 days after Chek Lap Kok opened. It marks the third phase of HACTL's recovery programme to move back to the new airport gradually to avoid overloading the computer system. 'The recovery programme has been progressing well and our strategy of using a prudent and measured approach to resuming full services at SuperTerminal 1 is on schedule,' HACTL managing director Anthony Charter said yesterday. The Government has estimated the cargo problems cost Hong Kong $4.6 billion.