The TH-28 was Enstrom's entry in the US Army's NTH (new training helicopter) program. Developed from the company's 280FX with a larger cabin and instrument panel, crashworthy seats and fuel system, turbine power and bigger tail surfaces. Although the Bell 206B-3 won the 1993 contract, Enstrom certified the TH-28 and built six for civil service before stretching the fuselage for the more successful five seat Enstrom 480.