==Development=====Origins===The EC135 started development prior to the formation of Eurocopter under Messerschmitt-Bölkow-Blohm (MBB) under the designation "Bo 108" by MBB in the 1970s.
TT-6C-2 Handbook Erection and Maintenance Instructions T-6, -6A, 6B USAF Model T-6C, T-6D Navy Models SNJ-3, SNJ-4, SNJ-5, SNJ-6 (1956)