.2009 Date Amended: September 26, 2011; April 05.2012 HIrrafrideVIJ andi)tYldrianlo, ternavAnze./: 4) For aircraft equipped with Williams F144 -3A P Engines, those engines must be installed under S'I'C ST02371 LA. 5) For aircraft equipped with Williams F144-3AP Engines FAA approved Airplane Flight Manua