The 5 minute limit applies to all operation above maximum continuous thrust.
#Cfm56 7b maintenance manual manual
Ratings, Restrictions and Power Management Takeoff Rating-The Takeoff Rating is the certified rating or ratings defined in the regulatory agency Approved Airplane Flight Manual and is limited to 5 minutes. Therefore, to obtain maximum engine service life, time at takeoff / high thrust should be held to the practical minimum, and rapid throttle movements avoided during normal flight operations. Rapid temperature transients are also detrimental to hot sections part life. Lubrication system.Oil type (Class B ) Stating Temp -40C 12.įuel system (fuel specification).D1655- JET-A, -A1, -B, MIL-T-5624G JP-1,JP-4,JP-5, MIL-T-83133 JP-8 Operating Requirements () Engine deterioration is directly related to engine hot section time/temperature (EGT) exposure. Ignition system Ignition exciter and plug Two per engine.
Accessory gearbox) Largest diameter (with inlet cowl) 88.4 inches (approximate) 10. Engine diameter Largest diameter (without inlet cowl 87.6 inches (approximate) Incl. Engine length (with flame arrestor)114.5 inches (approximate) Installed Engine Length (with inlet cowl).ġ984 Orson Welles Pdf. Engine Weight (Bare weight).4290 pounds dry (approximate) (Eng. Type of Turbine.5 stage, split, consisting of a 1 stage high pressure turbine and a 4 stage low press. Direction of Rotation (Both Rotors).Clockwise (as viewed from the rear looking fwd) 6. Type of Compressor.Two spool,13 stage compressor consisting of a 4 stage low pressure compressor (includes 1 stage fan) and a 9 stage high press compressor. Number and Type of Combustion Chamber.One / Annular 4. Type of engine.Axial Flow, Gas Turbine Turbofan 3. Trust Class for the CFM56-3B engine.Ģ2,100 LBS 2. An accessory drive system off the N2 rotor drives engine and airplane accessory components. After the primary airstream has been compressed by the LPC and HPC, combustion of the fuel in the annular combustion chamber increases the HPC discharge air velocity to drive the high and low pressure turbines. Air entering the engine are divided into a primary (inner) airstream and a secondary (outer) airstream (Fig3).
Basic engine specification are provided in Fig 1 and 2. The CFM56-3 is a high bypass, dual rotor, axial flow turbofan engine.After the embodiment of some CFMI service bulletin‘s, a upgrading of the CFM56-5A1 ( A320 standard ) to the CFM56.
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