CFM56-5C General
Engine Type
CFM56-5C
Type
Turbofan Engine
Thrust Rating (lbf)
22,000 - 33,000
Manufacturer
CFM
CFM56-5C Program Milestones
Initial Development Contract
4Q 1987
First Engine To Test (FETT)
December 1989
Flight Test on 707
August 1990
CFM-56-5C Certification
December 1991
A340/CFM56-5C Service Entry
February 1993
A340/CFM56-5C World Tour
June 1993
CFM56-5C4 Cert. 34.000 lb
October 1994
CFM56-5C4 Service Entry
March 1995


CFM56-5C (All Versions) Dimensions
Length
103.0 inch
Fan Diameter
72.3 inch
Basic Dry Weight
8,796 lb




CFM56-5C

The CFM56-C is the most powerful engine in the CFM56 family and one of the quietest in its specific thrust class. The engine is an economical turbofan engine specifically designed for the Airbus A340-200 and Airbus A340-300 four-engine long-range airliners, providing between 31,200 and 34,000 pounds of thrust.

The engine was certified in December 1991 by both the U.S. Federal Aviation Administration (FAA) and the French civil aviation authority DGAC. Two years later in 1993, the CFM56-5C entered service, expanding the family's scope of application to include long-range widebody airliners. The CFM56-5C combines innovative technologies with proven design enhancements, in particular: a highly-efficient 72.3 inch diameter fan featuring a 3D aerodynamic design and resistant to Foreign Object Damage (FOD), a second generation Full Authority Digital Engine Control (FADEC), and a new four-stage booster to further increase core flow while limiting turbine temperatures.

With the combination of a high bypass ratio and a noise-efficient long duct nacelle with mixer, the A340's CFM56-5C powerplant offers one of the lowest noise signatures in commercial service. Furthermore, the engine also delivers reduced fuel burn at take-off or cruise, and an impressive dispatch reliability rate of about 99.9%.


Austrian Airlines Airbus A340-200
France Air Force Airbus A340-200
Cathay Pacific Airbus A340-300
Examples of aircraft that are powered by the CFM56-5C

CFM56-5C Performance

Take-off Conditions (Sea Level)
CFM56
-5C2
-5C3 -5C4
Max Take-off (lb)
31,200
32,500
34,000
Airflow (lb/sec)
1,027
1,045
1,065
Bypass Ratio
6.6
6.5
6.4

In-Flight Performance (35,000 ft-Mach=0.80-ISA)
CFM56 -5C2 -5C3 -5C4
Max Climb Thrust (lb)
7,370
7,370
7,580
Overall pressure ratio
37,4
37,4
38,3
Max Cruise Thrust
6,910
6,910
7,100

Application
CFM56 -3-B1 -3B-2 -3C-1
Aircraft