The Jetstream 31 and the Jetstream 32EP are 19-seat turboprop airliners in operation worldwide. The Jetstream 31 entered service in 1982 and the increased power Jetstream 32 in 1988. BAE Systems completed an upgrade programme for the Jetstream 32 resulting in the Jetstream 32EP enhanced performance aircraft, certificated in 1997, which has short field capability and hot and high operational performance. Over 400 Jetstream 31/32 aircraft have been delivered.