How should the fuel consumed be evaluated?
Airlines have a choice between two methodologies for monitoring fuel use.
Airlines must monitor fuel use for each flight including fuel consumed by the APU.
Method A includes APU fuel after the flight whereas Method B includes APU fuel before the flight.
A methodology must be selected and consistently applied for each aircraft type.
Fuel consumed in Flight N: C – F + E (Method A) or A + B – D (Method B)
Possible sources for fuel uplift and fuel in tanks |
|---|
| 1. On-board measurement system |
| 2. Fuel supplier |
| 3. Mass & balance |
| 4. Aircraft technical log |
Possible sources for fuel density |
|---|
| 1. On-board measurement systems |
| 2. Fuel supplier information |
| 3. Density-temperature table |
| 4. Standard 0.8 kg / liter |
