In 1985 new A310-221s began changing 727s on the Internal German Services (IGS) and A300s flew in the Caribbean networks later on the exact 12 months even though from early 1986 supplemental new lengthier array A310-222s replaced some of the 747s on the slimmed-down transatlantic community following ETOPS certification (approval by the Federal Aviation Administration (FAA) of transoceanic traveling with twin-engined plane).