AMC6 CAT.OP.MPA.181 Fuel or energy scheme — fuel or energy planning and in‑flight re‑planning policy — aeroplanes

CAA ORS9 Decision No. 47

BASIC FUEL SCHEME WITH VARIATIONS – CONTINGENCY FUEL

1. Contingency fuel variations are methods of reducing the basic amount of contingency fuel based on established mitigating measures.

2. If the operator establishes and maintains a fuel consumption monitoring system for individual aeroplanes, and uses valid data for fuel calculation based on such a system, the operator may use any of the requirements in point (c) or (d) of this AMC to calculate the contingency fuel.

3. The contingency fuel should be the fuel described in points (c)(1) or (c)(2) of this AMC, whichever is higher:

   1. an amount of fuel that should be either:

      1. not less than 3 % of the planned trip fuel or, in the event of in-flight re-planning, 3 % of the trip fuel for the remainder of the flight provided that a fuel en-route alternate (fuel ERA) aerodrome is available; or

      2. an amount of fuel sufficient for 20-minute flying time based upon the planned trip fuel consumption; or

      3. an amount of fuel based on a statistical fuel method that ensures an appropriate statistical coverage of the deviation from the planned to the actual trip fuel; prior to implementing a statistical fuel method, a continuous two-year operation is required during which statistical contingency fuel (SCF) data is recorded — note: to use SCF on a particular city pair / aeroplane combination, sufficient data is required to be statistically significant; the operator should use this method to monitor the fuel consumption on each city pair / aeroplane combination, and to carry out a statistical analysis to calculate the required contingency fuel for that city pair / aeroplane combination; or

   2. an amount of fuel to fly for 5 minutes at holding speed at 1 500 ft (450 m) above the destination aerodrome in standard conditions.

4. RCF procedure: if the operator’s fuel policy includes pre-flight planning to a destination 1 aerodrome (commercial destination with an RCF procedure using a decision point along the route) and a destination 2 aerodrome (optional refuelling destination), the amount in the pre-flight calculation of the required usable fuel should be greater than the sum in points (d)(1) or (d)(2):

   1. the sum of:

      1. taxi fuel;

      2. trip fuel to the destination 1 aerodrome via the decision point;

      3. contingency fuel equal to not less than 5 % of the fuel that is estimated to be consumed from the decision point to the destination 1 aerodrome;

      4. the amount of fuel specified in AMC2 CAT.OP.MPA.182: destination 1 alternate fuel or no alternate fuel if the remaining flying time from the decision point to destination 1 aerodrome is less than 6 hours;

      5. for FRF or energy, comply with CAT.OP.MPA.181(c)(5);

      6. additional fuel;

      7. extra fuel if there are anticipated delays or specific operational constraints; and

      8. discretionary fuel, if required by the commander; or

   2. the sum of:

      1. taxi fuel;

      2. trip fuel to the destination 2 aerodrome via the decision point;

      3. contingency fuel equal to not less than the amount that is calculated in accordance with point (c) of this AMC, from the departure aerodrome to the destination 2 aerodrome;

      4. alternate fuel if a destination 2 alternate aerodrome is required;

      5. FRF or energy;

      6. additional fuel;

      7. extra fuel if there are anticipated delays or specific operational constraints; and

      8. discretionary fuel, if required by the commander.