Description (AMM 72-00-00)

 

A- The CFM56-3 is a high bypass, dual-rotor, axial flow turbofan engine. Basic engine specifications are provided in Fig. 1 and 2.

 

B- The integrated fan and booster (low pressure compressor - LPC) is driven by a 4 stage low pressure turbine (LPT) (Fig. 4). A single-stage high pressure turbine (HPT) drives the 9 stage high pressure compressor (HPC). The two rotors are mechanically independent of each other. Air entering the engine is divided into a primary (inner) airstream and a secondary (outer) airstream (Fig. 4). After the primary airstream has been compressed by the LPC and HPC, combustion of fuel in the annular combustion chamber increases the HPC discharge air velocity to drive the high and low pressure turbines. An accessory drive system off the N2 rotor drives engine

And airplane accessory components.

 

C- The engine consists of 4 major sections: fan major module, core engine major module, LPT major module and accessory drive system (Fig. 4). It also includes the following components which are not included in any section: spinner front cone, LPT shaft plug and coupling nut, aft rotating air/oil separator, and oil inlet cover. Nacelle stations are provided in Fig. 5.