Helmet fire, the CT7-2A in the ST is the same engine as in the UH 60-L exept for start fuel nozzles , shrouded fuel lines for civil cert. and elec starters, the T-700 with air starters spin up quicker than the CT7 and don't need the start fuel nozzles.
The T700/CT7 series is fitted in UH60,SH60, AH64,EH101,AH1 W/Z,SH2G,NH90,214ST,UH1 Y, and fitted to some 205's etc .it is the most fitted engine in Helicopters in the world after Allison 250's and russian stuff.
I've worked on Arriel,Allison 250,PT6 twin pac, T53, T55, CT58, Turmo,Makila, and CT7/T700 and the CT7/T700 is by far miles ahead of the others, the only one close is the new RRTM 322, in the NH90,EH101 and UK AH64's.