Pratt & Whitney T73

T73/JFTD12
JFTD12-4A mounted on an Erickson S-64E Aircrane
TypeTurboshaft
National originUnited States
ManufacturerPratt & Whitney
Major applications
Number built352
Developed fromPratt & Whitney JT12

The Pratt & Whitney T73 (company designation JFTD12) is a turboshaft engine. Based on the JT12A, the T73 powered the Sikorsky CH-54 Tarhe and its civil counterpart Sikorsky S-64 Skycrane flying crane heavy-lift helicopters. Turboshaft versions for naval use are known as the FT12, and have been used on the Iroquois-class destroyer.