With necessary funding available, the Airbus Supervisory Board approved the development of the A330 and A340 with potential customers on 27 January 1986. Its chairman Franz Josef Strauss stated afterwards that "Airbus Industrie is now in a position to finalise the detailed technical definition of the TA9, now officially designated as the A330, and the TA11, now called the A340, with potential launch customer airlines, and to discuss with them the terms and conditions for launch commitments". The designations were originally reversed and were switched so the quad-jet airliner would have a "4" in its name. Airbus hoped for five airlines to sign for both the A330 and A340, and on 12 May sent sale proposals to the most likely candidates, including Lufthansa and Swissair.