GE Aerospace T700 modular turboshaft family, in service since 1978 with continuing production and support. The family delivers up to 2,000 shaft horsepower and includes the T700-401D for H-60/Marine H-1 applications, T700-701D for Sikorsky UH-60M and Boeing AH-64E Apache, and rear-drive T700-701K for the KAI Surion. Civil CT7 turboprop derivatives remain a separate family boundary.