https://www.miamiflightacademy.com//wp-content/uploads/2014/11/MiamiFlightAcademy.png00Miami Flight Academyhttps://www.miamiflightacademy.com//wp-content/uploads/2014/11/MiamiFlightAcademy.pngMiami Flight Academy2018-05-23 18:20:282018-05-23 18:20:28What pretakeoff check should be made of a vacuum driven heading indicator in preparation for an IFR flight?