2.3. The input data
This paragraph details the input, which the APM program needs for cruise
performance analysis.
Following is a reference table for cross-checking that all required parameters can
be accessed easily.

Flight Operations & Line Assistance Getting to Grips with Aircraft Performance Monitoring
CRUISE PERFORMANCE ANALYSIS

Label  Parameter  Unit  Comments  Influence on the result 
AILNO  Aircraft Tail Number  (–)  None 
DATE  Date  YYMMDD  None 
FLNO  Flight Number  (–)  None 
FCASE  Flight Case or DMU/FDIMU recording time  1-99  Number of data of a same flight. If no value is set, the program sets a "1".  None 
hhmm  Time at which the performance point was taken in flight.  None 
ESN  Engine serial number  (–)  None 
ALT  Altitude  (ft)  From the two air data computers (ADC) 
MACH  Mach number  (–)  From the two air data computers (ADC) 
TAT  Total Air Temperature  (°C)  From the two air data computers (ADC) 
MASS  Aircraft mass (weight)  (kg or lb)  Impact on DFFA 
CG  Center of Gravity  (%)  Impact on DFFA 
FPAC  Flight Path Acceleration  (g)  Horizontal acceleration measured in g.  Impact on DFFA 
VV  Vertical Velocity  (ft/min)  Vertical acceleration 
THDG  True Heading  (°)  Optional - used only if gravity correction activated. 
LAT  Latitude  (°)  Optional - used only if gravity correction activated. 
CWI  Wind speed  (kt)  Optional - used only if gravity correction activated. 
DWI  Wind direction  (°)  Optional - used only if gravity correction activated 
AFT  Average fuel temperature  (°C)  NOT ACTIVE  None 
AFD  Average fuel density  (l/kg)  NOT ACTIVE  None 
REG  N1 - Power setting EPR - Power Setting  (%) (–)  Depends on engine type EPR for IAE, RR and P&W engines, N1 for GE and CFM engines. 

Flight Operations & Line Assistance Getting to Grips with Aircraft Performance Monitoring

CRUISE PERFORMANCE ANALYSIS
FFA  Actual fuel flow  (kg/h, lb/h)  Fuel flow for each engine (FFA1, FFA2, ...)  Impact on DFFB 
Label  Parameter  Unit  Comments  Influence on the result 
EGT  Exhaust gas temperature  (°C)  To be set for each engine (EGT1, EGT2, ...) 
FLHV  Fuel lower heating value  (BTU/lb)  Impact on DSR 
WBLL  Engine bleed flow (left)  (kg/s or lb/s)  Engine 1 flow (twin engine A/C) or sum of engines 1 and 2 (4 engine-aircraft)  Impact on DFFA 
　
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