Cream butter and sugar until fluffy. Add eggs and mix well. Stir in bananas. Sift flour, baking powder, baking soda and salt together. Add to cream mixture and mix well. Fold in undrained pineapple and coconut. Grease and flour two 9 x 5 loaf pans. Pour batter into pans. Bale at 350 for 70 minutes until tester come out clean. Remove from pans to cool