The Airport Authority's chief executive yesterday denied that the Chief Secretary for Administration and the Executive Council had been misled over unresolved problems before Chek Lap Kok's chaotic opening. The remark by Dr Hank Townsend came during six hours of cross-examination before the Commission of Inquiry on the New Airport. He said that neither the council nor Anson Chan Fang On-sang had been misled. On his fourth day of testimony, Dr Townsend was asked why a report to the council just weeks before the opening did not give a full account of the malfunctions with the Flight Information Display System. The report did not mention problems that had plagued the system as it was being rush-tested before the opening. The complex system crashed on July 6 causing chaos among passengers, baggage handlers and cargo operators. Benjamin Yu SC, counsel assisting the commission, asked why the report did not fully cover problems affecting the system, which included faults with its liquid crystal displays and television monitors. 'Why didn't the Airport Authority tell the Chief Secretary that there were various parts of the system [with problems] - wouldn't this bring a fairer picture? I think it could have been explained further to Exco,' Mr Yu said. Dr Townsend agreed that the report was supposed to bring a true picture of the situation with the system to Mrs Chan and the council, but denied any cover-up. 'I do not believe it was an attempt to mislead,' he said. The report said the system had been operating at 97 per cent efficiency during tests. The denial came a day after Mrs Chan told the Legco select committee inquiring into the airport fiasco that she had no worries before the opening, saying she had been told that the last three tests of the system were satisfactory. The commission heard that authority chairman Wong Po-yan had expressed 'immense concern' over repeated foul-ups with the system in the run-up to the opening and feared a 'major crisis'. A simpler program for the system was swapped for a more complex version some 17 months into the $231 million contract to install it, to extend its capabilities. The change cost an extra $89.78 million, which Mr Yu described in view of the July 6 crash as 'public money down the drain'. The change, in November 1996, delayed installation work by 14 months leaving little time for thorough tests. Dr Townsend's testimony before commission chairman Mr Justice Woo Kwok-hing will continue tomorrow.