The CFM56 core is based on the GE F engine .. CFMA vs –5B Design. CFMA EGT MARGIN is the difference between. Ok, the CFM56 is on the A and the BClassic and NG. . specific since the CFMA, -5B and -5C are three very different engines. In , Tech Insertion became the production configuration for all CFMB engines, further providing operators with significant improvements in fuel.

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Retrieved 2 August GE applied for the export license in as their primary contribution to the ton engine project. With two separate exhaust difterences, the flow is “unmixed”. The Technical Site.

GE Aviation Press Release. Unlike every other variant of the CFM56, the -5C features a mixed-exhaust nozzle, [nb 1] which offers slightly higher efficiency. Air Transport Intelligence news via Flightglobal. Retrieved vfm56 November Retrieved 11 December SeeAppendixD1 Sensorlocatedatthe12O’clockpositionontheturbineframe Asemirigidcableconnectsthesensortoanelectricalconnector,whichis securedonabracketonthecoreengineatthe10O’clockposition ThrustReverser: Retrieved 22 March The CFM first ran on 21 April There have been several engine failures in the early service of the CFM56 family which were serious enough to either ground the fleet or require aspects of the difrerences to be redesigned.

CFMI was made responsible for the day-to-day decision making for the project, while major decisions developing a new variant, for example required the go-ahead from GE and Snecma management. The CFM56 features a single-stage fan, and most variants have a three-stage booster on the low-pressure shaft, [nb 5] with four stages dlfferences the -5B and -5C variants. The program focused on developing a large number of new technologies for the theoretical future engine, not necessarily creating an all-new design.


On April 17,Southwest Airlines Flight suffered from what appears to be a fan blade failure, debris from which punctured a window. This design lowers the emissions of both nitrogen oxides NO x and carbon dioxide CO 2.

CFM International CFM56

Retrieved 10 November The high-pressure turbine stages in the CFM56 are internally cooled by air from the high-pressure compressor.

The Wall Street Journal.

They work by actuating a door that pivots down into the bypass duct, both blocking the bypass air and deflecting the flow outward, creating the reverse thrust. Generally, the shroud of one blade rests on the shroud of the adjacent blade, forming a continuous diffetences. AW More mobility for the world Technik.

The major changes are a larger fan, a fifth low-pressure turbine stage, and the same four-stage low-pressure compressor found in the -5B variant.

CFM56 5A 5B Differences

SeeAppendixS1 Oneoilsupplyfilterwithclogindicationonlybyvisualpopoutindicator Beforeenteringlubeunit,scavengeoilpassthrough4strainersequippedwith magneticchipdetectorsandacommonscavengefilter SeeApp. This mode of failure led to the Kegworth air disaster inwhich killed 47 people and injured 74 more. A very recent investigation has led to the tentative conclusion that the problem originates in the Hydromechanical unit, and may involve 5x unacceptable level of fuel contamination with water, or particulate matter, including biodegradable material that create solids in the fuelor overuse of biocides to reduce bacterial growth.


The CFM56 is a two-shaft or two-spool engine, meaning that there are two rotating shafts, one high-pressure and one low-pressure. At the time it was not mandatory to flight test new variants of existing engines, and certification testing failed to reveal vibration modes that dicferences fan dfm56 during the regularly performed power climbs at high altitude.

This page was last edited on 12 Decemberat GE produces the high-pressure compressorcombustorand high-pressure turbineSnecma manufactures the fan, gearboxexhaust and the low-pressure turbine, and some components are made by Avio of Italy. Prior to this accident, there were several other incidents of single or dual flameouts due to these weather conditions. A midspan shroud is visible on the fan blades here [2].

Like other aspects of the program, international politics played their part in this contract. An example can be seen here [1].

CFM International CFM56 – Wikipedia

Retrieved 18 April The CFM56 is designed to support several reverse thrust systems which help slow and stop the aircraft after landing.

KCBDC-8 Views Read Edit View history. In other differencea Wikimedia Commons.