Historical clue formulations

• Prepared for takeoff — 2017-10-29
• Prepared for takeoff — 2016-02-21
• Went along the tarmac — 2014-06-09
• Prepared for takeoff — 2010-04-06
• Proceeded along the tarmac — 2008-09-16
• Got ready for takeoff — 2005-05-18
• Got ready to fly — 1998-03-21