EntityQ258258· pop 5S54Sign in to saveS54 may refer to:Article2 sectionsContentsAircraftOther usesS54 may refer to:== Aircraft == Blériot-SPAD S.54, a French biplane trainer Sikorsky S-54, an American helicopter Sukhoi S-54, a proposed Russian trainer aircraftRead full article (3 paragraphs)ConnectionsNissan SkylineEntitySikorsky R-4EntityRongaEntityBMW M54EntityDhurgaEntityShorlandEntityCategoriesLetter–number combination disambiguation pages