getting to grips with aircraft performance monitoring(25)_航空信息_民用航空_通用航空

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Figure B21 illustrates how the specific range method, the fuel used method, the fuel on board method relate to each other and relative to the IFP baseline.
.FBO FBO
.FU FU
.SR SR
IFP level

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>