PREDICTION VARIATIONS (Flight Profile and Conditions)
STABILZATION
(Flight Path and Atmosphere)
GLOBAL AIRCRAFT PERFORMANCE
DEGRADATION
2% (1% to 3%)
1% (0.5% to 1%)
X % (Monitored fuel factor)
Figure B21: Performance monitoring method comparison
Flight Operations & Line Assistance Getting to Grips with Aircraft Performance Monitoring
BACKGROUND
All the above methods naturally have relative advantages and disadvantages which airlines have to weigh out against each other.
Advantages Disadvanges Comments
Specific rangemethod Potential splitting of engine and airframe Easy processing Scatter, sensitive Stability critical Not adapted for factoring on short/medium-haul
Fuel-used Method Easy data gathering Scatter elimination ATS remaining in use No bias elimination Tedious processing Adapted for flight planning Operational conditions
Trip fuel burn-off analysis Scatter elimination ATS remaining in use More crew attention required Tedious data gathering and processing Adapted for fuel factoring on short-haul.
4. AIRCRAFT PERFORMANCE MONITORING COMMUNITY
Aircraft Performance Monitoring involves many actors within the airline. On the next page, a sample data flow was drawn for a typical airline. Of course, the organization of the airline may impose different data flows but this aims at giving an overall idea of the task sharing when dealing with aircraft performance monitoring.
Flight Operations & Line Assistance Getting to Grips with Aircraft Performance Monitoring
BACKGROUND
R02-5000.0003 99SEP243 13:46:213 XXXXXX3
01:06:593 CRUISE PERFORMANCE 3
50003 "BEST" STABILITY
R02-5000.0003 99SEP243 13:46:213 XXXXXX3
3 04034B20301:06:593 CRUISE PERFORMANCE000000363 3
.F-GLZE3 000000003
12210.003 XXXXXX3 XXXXX 3 000A3403SE1N03
50003 "BEST" STABILITY
R02-5000.0003 99SEP243 13:46:213 XXXXXX3
3 04034B203 .F-GLZE3 000000363 000000003
01:06:593 CRUISE PERFORMANCE 3
12210.003 XXXXXX3 XXXXX 3 000A3403SE1N03
50003 "BEST" STABILITY
3 04034B203 .F-GLZE3 000000363 000000003
12210.003 XXXXXX3 XXXXX 3 000A3403SE1N03
A340 CRUISE PERFORMANCE REPORT <02>
PAGE 01 OF 02
A340 CRUISE PERFORMANCE REPORT <02>
ACID DATE UTC FROM TO FLT
PAGE 01 OF 02
CODE CNT
A340 CRUISE PERFORMANCE REPORT <02>
ACID DATE UTC FROM TO FLT
C1 .XXXXXX XXXXXX 01.06.59 XXXX XXXX XXXXXXXXXX
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