CFM56-5B Engine Models

CFM56-5B Engine Models: These engines, when produced by General Electric, are identified by the following serial number prefixes: 778, 574, 576, 696, 698, 644 or 646.  When produced by Snecma, these engines are identified by the following serial number prefixes: 779, 575, 577, 697, 699, 643 or 645.

CFM56-5B1: Similar to CFM56-5C2, except for new fan and booster and CFM56-5 LP turbine and revised thrust ratings.

CFM56-5B1/P: Same as CFM56-5B1, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.

CFM56-5B1/3: Same as CFM56-5B1/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B1/2P: Same as CFM56-5B1/2, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.  Note, the CFM56-5B1/2 was similar to the CFM56-5B1 except the CFM56-5B1/2 had a dual annular combustor.

CFM56-5B2: Same as CFM56-5B1, except for increased thrust ratings.

CFM56-5B2/P: Same as CFM56-5B2, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.

CFM56-5B2/3: Same as CFM56-5B2/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B2/2P: Same as CFM56-5B2/2, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.  Note, the CFM56-5B2/2 was similar to the CFM56-5B1 but with a dual annular combustor and increased thrust rating.

CFM56-5B3/P: Same as CFM56-5B1, except for increased thrust rating and redesigned high pressure compressor, high pressure turbine, and low pressure turbine.

CFM56-5B3/3: Same as CFM56-5B3/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B3/P1: Same as CFM56-5B3/P, except for a manually-activated takeoff thrust bump (within the certified standard day rating) for ambient temperatures above corner point.

CFM56-5B3/3B1: Same as CFM56-5B3/3P1, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B3/2P: Same as CFM56-5B1, except for increased thrust rating and redesigned high pressure compressor, high pressure turbine, and low pressure turbine. CFM56-5B3/2P has a dual annular combustor.

CFM56-5B3/2P1: Same as CFM56-5B3/2P, except for a manually-activated takeoff thrust bump (within the certified standard day rating) for ambient temperatures above corner point.

CFM56-5B4: Same as CFM56-5B1, except for decreased thrust ratings.

CFM56-5B4/P: Same as CFM56-5B4, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.

CFM56-5B4/3: Same as CFM56-5B4/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B4/P1: Same as CFM56-5B4/P, except for increased flat rating ambient temperature (corner point), and a manually-activated takeoff thrust bump (within the certified standard day rating) for ambient temperatures above corner point.

CFM56-5B4/3B1: Same as CFM56-5B4/P1, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B4/2P: Same as CFM56-5B4/2, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.  Note, the CFM56-5B4/2 was similar to the CFM56-5B1 but with a dual annular combustor and decreased thrust rating.

CFM56-5B4/2P1: Same as CFM56-5B4/2P, except for increased flat rating ambient temperature (corner point), and a manually-activated takeoff thrust bump (within the certified standard day rating) for ambient temperatures above corner point.

CFM56-5B5: Same as CFM56-5B1, except for decreased thrust ratings.

CFM56-5B5/P: Same as CFM56-5B5, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.

CFM56-5B5/3: Same as CFM56-5B5/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B6: Same as CFM56-5B1, except for decreased thrust ratings.

CFM56-5B6/P: Same as CFM56-5B6, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.

CFM56-5B6/3: Same as CFM56-5B6/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B6/2P: Same as CFM56-5B6/2, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.  Note, the CFM56-5B6/2 was similar to the CFM56-5B1 but with a dual annular combustor and decreased thrust rating.

CFM56-5B7: Same as CFM56-5B1, except for decreased thrust ratings.

CFM56-5B7/P: Same as CFM56-5B7, except for redesigned high pressure compressor, high pressure turbine, and low pressure turbine.

CFM56-5B7/3: Same as CFM56-5B7/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B8/3: Same as CFM56-5B8/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B9/P: Same as CFM56-5B1/P, except for reduced thrust rating.

CFM56-5B9/3: Same as CFM56-5B9/P, except for redesigned high pressure compressor, high pressure turbine, and combustor.

CFM56-5B9/2P: Same as CFM56-5B1/2P, except for reduced thrust rating.

 

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