HC Deb 20 November 1969 vol 791 cc378-9W
Sir G. Sinclair

asked the Minister of Technology, in view of the progress in the development of quieter aero engines, and towards reaching international agreement on noise certification of aero engines, if he will consider taking steps to implement a programme to assist the installation of quieter engines in current British jet aircraft which will otherwise continue for many years to create noise at levels that will be prohibited for the new generation of aircraft.

Mr. Carmichael

This matter is still under consideration internationally, but studies so far suggest that the cost, using known techniques, would be disproportionate to any benefit likely to be achieved.