2.5.2. A300-600/A310 aircraft
The basic PERF FACTOR entered in the MCDU at delivery is "0.0" for all A300-600/A310 aircraft.
2.5.3. A320 “CFM” engines
The “CFM” family is split into several tables due to the numerous versions on aircraft fitted with CFM56-5B engines. Indeed, this engine type (5B) enables to have SAC (Single Annular Combustion chamber) or DAC (Double Annular Combustion chamber) and the “/P” option, which is a SFC (Specific Fuel Consumption) improvement (“physically” resulting from a HP blade and LP compressor modification).
For all these aircraft the basic performance factor is given below.
2.5.3.1. CFM56-5A engines
2.5.3.1.1. FMS1
Perf Factor
A319-113 CFM56-5A4 0.0
A319-114 CFM56-5A5 0.0
A320-111 CFM56-5A1 0.0
A320-211 CFM56-5A1 +0.5
A320-212 CFM56-5A3 +0.5
Flight Operations & Line Assistance Getting to Grips with Aircraft Performance Monitoring
USING THE MONITORED FUEL FACTOR
2.5.3.1.2. FMS2
Perf Factor
A319-113 CFM56-5A4 0.0
A319-114 CFM56-5A5 0.0
A320-111 CFM56-5A1 0.0
A320-211 CFM56-5A1 0.0
A320-212 CFM56-5A3 0.0
2.5.3.2. CFM56-5B engines
2.5.3.2.1. FMS1
Non /P /P
SAC DAC SAC DAC
A319-111 CFM56-5B5 0.0 0.0 -4.5 -3.5
A319-112 CFM56-5B6 0.0 0.0 -4.5 -3.5
A319-115 CFM56-5B7 0.0 0.0 -4.5 -3.5
A320-214 CFM56-5B4 0.0 0.0 -3.0 -2.0
A321-111 CFM56-5B1 0.0 0.0 -2.0 -1.5
A321-112 CFM56-5B2 0.0 0.0 -2.0 -1.5
A321-211 CFM56-5B3 0.0 0.0 -2.0 -1.5
A321-212 CFM56-5B1 0.0 0.0 -2.0 -1.5
A321-213 CFM56-5B2 0.0 0.0 -2.0 -1.5
Flight Operations & Line Assistance Getting to Grips with Aircraft Performance Monitoring
USING THE MONITORED FUEL FACTOR
2.5.3.2.2. FMS2
Non /P /P
SAC DAC SAC DAC
A319-111 CFM56-5B5 4.5 4.5 0.0 1.0
A319-112 CFM56-5B6 4.5 4.5 0.0 1.0
A319-115 CFM56-5B7 4.5 4.5 0.0 1.0
A320-214 CFM56-5B4 3.0 3.0 0.0 1.0
A321-111 CFM56-5B1 2.0 2.0 0.0 1.0
A321-112 CFM56-5B2 2.0 2.0 0.0 1.0
A321-211 CFM56-5B3 2.0 2.0 0.0 1.0
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