DETERMINATION OF THE QUANTITIES OF FUEL AND OIL CARRIED Flashcards
Taxi fuel (TAXI)
Fuel expected to be used prior to take-off, including engine + start, taxi and APU consumption. If taxi time is not specified, a 15 minutes fuel consumption shall be considered.
Trip fuel (ABCD) (four letter ICAO code of the destination airport)
The amount of fuel required to enable the aircraft to fly from take-off or the point of in-flight re-planning until landing at the destination airport taking into account the operating conditions
Contingency fuel (RR 5), (RR 0) or (RR N)
Fuel to cover deviations from the planned operating conditions such as unfavorable variations in cruise altitude or track, deviations from the forecast wind values or any other unforeseen adverse circumstances.
Contingency fuel shall be the highest of A or B as following:
- (RR 5): 5% of the planned trip fuel or, in the event of in-flight replanning (decision point procedure), 5% of the trip fuel for the remainder of the flight;
- (RR 0): An amount of fuel to fly for 5 minutes at holding speed at 1500 ft (450 m) above the destination aerodrome in standard conditions.
Alternate fuel - (VXYZ) (four letter ICAO code of the
destination alternate)
Fuel to reach the alternate aerodrome, taking into
account:
- A missed approach at the destination aerodrome;
- Fly the expected routing to the alternate, taking in consideration climb, cruise at long range cruise speed, descent;
- Approach and landing at alternate aerodrome;
(NOALT):
An amount of fuel to fly for 15 minutes at holding speed at 1500 feet (450 m) above the destination aerodrome in standard conditions if no alternate has been planned.
When two destination alternates are required, alternate fuel shall be sufficient to proceed to the alternate which requires the greater amount of alternate fuel.
Final reserve fuel (FR)
Fuel to fly for 30 minutes at holding speed at 1500 ft (450 m) above aerodrome elevation in standard conditions, calculated with estimated weight on arrival at the alternate or at the destination when no alternate is required.
Additional fuel
A supplementary amount of fuel, required only as the
result of the following analysis. In the event of engine failure or loss of pressurization, the amount of fuel on board must permit:
- the aircraft to descend as necessary and
- proceed to an adequate/ suitable aerodrome, and
- hold there for 15 minutes at 1500 ft AAE, and
- make an approach and landing,
Extra fuel (EXTRA) – at the discretion of the commander.
The commander may decide for example to add fuel to the minimum required fuel quantity defined above if he expects significant deviations from present flight planning. However it should be kept in mind that any increase of aeroplane weight due to extra fuel will decrease take-off and climb performance and will increase the fuel consumption.
It is also reminded that Company policy requires the Commander to report the reason of his decision, for helping in the effort to improve the fuel planning process.
Company Fuel (CF)
Shall be recommended and planned into CFP. Subject
of the current conditions the commander may decide to take all, or part of CF
Minimum Over Destination (MIN OHD)
Shall be added, to increase Total reserve when such fuel quantity is mandatory (e.g. no fuel available for the return flight at destination airport).
Total reserve (TOTAL RESERVE)
Is a parameter summarizing the fuel quantities in excess of taxi fuel and trip fuel to destination. That means always Contingency fuel and Final Reserve and, subject of the specific planning conditions Alternate fuel, Additional fuel, Company fuel, Minimum over destination, and Extra fuel.
Isolated aerodrome
When the destination is an isolated aerodrome (aerodrome without alternate), alternate fuel and final reserve fuel are replaced by the fuel necessary to fly for two hours at cruise speed.
The minimum oil quantity requested for
any flight is equal to
The minimum quantity specified for a particular engine, plus the estimated oil consumption. The estimated oil consumption should cover the flight time the aeroplane can be operated with the minimum quantity of fuel requested by the fuel planning plus 15 minutes.
The hourly oil consumption is determined by the maintenance.