Flight Operations & Line Assistance Getting to Grips with Aircraft Performance Monitoring
HOW TO RECORD IN-FLIGHT PARAMETERS

CRUISE PERFORMANCE ANALYSIS - PRE-FLIGHT FORM  Page 
A/C No Flight No Date From To 
CHECK LIST 
AT DISPATCH Computerized flight plan Weather forecast Load sheet Fuel sample for FLHV analysis Aircraft visual inspection 
BLOCK FOB APU START TIME ZFW APU  STOP TIME ZFCG APU RUNNING TIME AIRCRAFT WEIGHT APU FUEL CONSUMPTION 
TAKEOFF ENGINE START TIME TAKEOFF TIME TAKEOFF WEIGHT QNH TAKEOFF CG V1/VR/V2 RWY ID 
CRUISE COST INDEX PERF FACTOR Before any point is recorded in-flight, you have to go through the following process Only start recording after going through the preliminary process. Leg of at least 15 minutes flight long Fuel unbalance between wing tanks Disconnect autothrust and set N1/EPR to appropriate value Engaged autopilot in ALT HLD/HDG SEL mode. Select AC flow normal, both bleed/pack ON, engine and wing A/I OFF Additional recommendations Specific checks have to be performed during flight - refer to the in-flight observation form Do not touch the thrust levers during the whole subsequent period unless recordings are stopped because of instability. Wait for 5 minutes for aircraft stabilization before starting actual data recording (references are EGT, N1/EPR, ground speed and SAT). Check the initial drift angle to be less than 2.5 degrees and rate of change not exceeding 0.5 degree per minute. 
COMMENTS 

Flight Operations & Line Assistance
52
Getting to Grips with Aircraft Performance Monitoring

    CRUISE PERFORMANCE ANALYSIS - FLIGHT OBSERVATION FORMA/C No
Flight No
RecommendationsSTART TIME
Monitor stability of: G/S, Mn, Drift, SAT, FPAC, Wind (force and direction), balance of fuel in the tanksDisconnect A/THR and switch to HDG mode
In-flight data
Page
REPORT INITIAL WEIGHT AC LO/ECON
DRIFT ANGLE
DEG
CGHEADING CARGO COOLING ON
NO
HI
SAT
DEG
LATITUDE
OFF
KG 
%
DEG 
DEG 

FU/EGT  4 / / / / / / / / / / / / / / / / / / / / 
3 / / / / / / / / / / / / / / / / / / / / 
2 / / / / / / / / / / / / / / / / / / / / 
1 / / / / / / / / / / / / / / / / / / / / 
FF  4
3
2
1 
N1/EPR 4
3
2
1 
WINDHDG/F  / / / / / / / / / / / / / / / / / / / / 
TAT 
MN
ALT
GROUND SPEED  5.. ......... 
4 ......... 
3.. ......... ......... 
2 .......... 
1  ......... 
0
-1
-2.. ......... 
-3. ......... 
-4. ......... 
-5 .......... 
　
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