The three companies will perform maintenance work on the power sections, reduction gear assemblies and torquemeters of T56 Series III, the Defense Department said Wednesday.
The Rolls-Royce-built T56 turboprop engine features a 14-stage axial flow compressor and its gearbox comprises two stages of gear reduction.
Contractors will conduct the services in Texas, Alabama and Florida through December 2020.
The Naval Air Warfare Center Aircraft Division received four offers for the indefinite-delivery/indefinite-quantity contract.