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  • Flight Planning Tankering - New question format

    Students can expect new questions, similar to the one below, in the exam. questions can be written to ask the maximum extra fuel or given a specific mass increase/decrease, what extra fuel is needed or what is the new burn off.


    Given the following information, in a Commercial Air Transport operation, calculate the maximum possible Extra Fuel, including any fuel penalty, that can be uplifted.

    MTOM: 230 000 kg MLM: 180 000 kg MZFM: 170 000 kg Planned ZFM: 156 000 kg

    Fuel tank capacity: 110 000 kg Trip Fuel: 40000 kg Planned T/O Fuel: 45000 kg

    Fuel burn correction per 1000 kg of Extra Fuel based upon: TOM: + 166 kg and LDM: + 199 k



    TOM: 156 000 + 45000 = 201 000 kg
    Extra based on MTOM: 230 000
    BGS TKI

  • #2
    Sorry the system as chopped off the explanation or is that extra burn?

    Students can expect new questions, similar to the one below, in the exam. Questions can be written to ask the maximum extra fuel or, given a specific mass increase/decrease, what extra fuel is needed or what is the new burn off.


    Given the following information, in a Commercial Air Transport Operation, calculate the maximum possible Extra Fuel, including any fuel penalty, that can be uplifted.

    MTOM 230 000 kg MLM 180 000 kg MZFM 170 000 kg Planned ZFM 156 000 kg

    Fuel Tank Capacity 110 000 kg Trip Fuel 40 000 kg Planned T/O Fuel 45 000 kg

    Fuel Burn Correction per 1000 kg Based upon TOM + 166 Kg Based upon LDM + 199 Kg

    TOM 156 000 + 45 000 = 201 000 Kg
    Extra based upon MTOM 230 000 - 201 000 = 29 000 kg

    Fuel at Destination 45 000 - 40 000 = 5 000 Kg
    Extra based upon MLM 180 000 - 156 000 ZFM - 5 000 = 19 000 Kg

    To arrive at destination at the MLM would require an additional 19 000 / 1000 x 199 = 3 781 Kg Extra Fuel Burn

    Therefore the extra fuel that can be uploaded = 19 000 + 3 781 = 22 781 Kg

    Check against TOM 22 781 / 1000 x 166 = 3 781 Kg

    This is similar to the ratio method used in previous questions but as in all Questions only use the information given and do not mix methodologies or you will find different answers.
    BGS TKI

    Comment


    • #3
      I love the CAA,

      Thanks, very useful!

      Comment


      • #4
        I had this in Gatwick today. The numbers are almost identical to those posted by James in recent feedback. Rather than giving you TL and DOM, planned ZFM is given instead

        MTOM 875,000lb
        MLM 652,000lb
        MZFM 555,100lb
        PLANNED ZFM: cant remember
        Trip Fuel 198,620lb
        Planned T/O Fuel 226,195lb
        MAX tank capacity is 377,###

        Penalty per 1000lb extra fuel carried if based on TOM: +319.7lb, if based on LM: 470lb

        Find max additional fuel that can be carried

        3 marks, type in value to the nearest whole number

        Comment


        • #5
          Is it this one Filip ?

          MTOM 875,000lb
          MLM 652,000lb
          MZFM 555,100lb
          DOM 394,100lb
          TL 155,215lb
          Trip Fuel 198,620lb
          Planned T/O Fuel 226,195lb
          Taxi 1600lb
          Penalty 470lb each 1000lb
          Fuel Capacity 377,750lb
          Question : Max extra fuel ?

          99 490lb is Correct.
          MTOM 875 000
          Dom 394 100
          480 900
          TL 155 215
          325 685 Fuel Poss (Max 377 750)
          Plan F 226 195
          99 490 add Fuel MTOM limited

          Comment


          • #6
            that's the one! Except planned ZFM given. I got the same answer.

            Comment


            • #7
              Just got results, 100% in FP by some miracle, so this is confirmed now. Upload is based on MTOM limit which is 99490 or something similar if those numbers aren't exact. That was my last exam so good luck guys!

              Comment


              • #8
                Congratulations
                BGS TKI

                Comment


                • #9
                  Congrats Filip did you find any unespectaed question ?

                  Comment


                  • #10
                    Originally posted by Mac View Post
                    Sorry the system as chopped off the explanation or is that extra burn?

                    Students can expect new questions, similar to the one below, in the exam. Questions can be written to ask the maximum extra fuel or, given a specific mass increase/decrease, what extra fuel is needed or what is the new burn off.


                    Given the following information, in a Commercial Air Transport Operation, calculate the maximum possible Extra Fuel, including any fuel penalty, that can be uplifted.

                    MTOM 230 000 kg MLM 180 000 kg MZFM 170 000 kg Planned ZFM 156 000 kg

                    Fuel Tank Capacity 110 000 kg Trip Fuel 40 000 kg Planned T/O Fuel 45 000 kg

                    Fuel Burn Correction per 1000 kg Based upon TOM + 166 Kg Based upon LDM + 199 Kg

                    TOM 156 000 + 45 000 = 201 000 Kg
                    Extra based upon MTOM 230 000 - 201 000 = 29 000 kg

                    Fuel at Destination 45 000 - 40 000 = 5 000 Kg
                    Extra based upon MLM 180 000 - 156 000 ZFM - 5 000 = 19 000 Kg

                    To arrive at destination at the MLM would require an additional 19 000 / 1000 x 199 = 3 781 Kg Extra Fuel Burn

                    Therefore the extra fuel that can be uploaded = 19 000 + 3 781 = 22 781 Kg

                    Check against TOM 22 781 / 1000 x 166 = 3 781 Kg

                    This is similar to the ratio method used in previous questions but as in all Questions only use the information given and do not mix methodologies or you will find different answers.

                    So comparing this question with 330766, if the question states "fuel burn correction per 1000kg based upon LM +199 kg" it means that for every 1000kg of fuel EXTRA uplifted, we need to ADD 199kg. So this would mean using the simple proportion technique, for every 1000kg = 199kg extra, so how much would be needed for 19000kg? Hence 19000 x 199 / 1000.

                    Now compared to 330766, it is saying fuel penalty is 135kg per 1000kg extra fuel. In this question you get the correct answer if you do 1000 - 135 = 865kg and work with that. Is this how we should go about it or am I getting things mixed up?
                    Thanks

                    Comment


                    • #11
                      Hi Transalp

                      Its all the terminology. Uplifted means loaded at the ramp so not relevant to the Landing Mass Ltd additional fuel.

                      For the question you quoted think of it like this:
                      The +199 Kg has to be added to each additional 1000 kg at Landing. In this case we are LM limited so maximum additional is 19000 at Landing.
                      We will use fuel in the cruise carrying the additional fuel (the penalty).
                      So we add 199 Kg (the fuel penalty) to each 1000 kg at landing to calculate the total fuel penalty 3 781 Kg and add that to the additional Landing Mass fuel to calculate the additional Take off fuel or uplift.

                      If we had been TOM Ltd and could say only add 19 000 Kg to the TOM then we would use the +166 per 1000 Kg to calculate the total fuel penalty (19 x 166 = 3154) and, if required, the additional fuel at landing (19000 - 3154 = 15846 kg)
                      This is the same as if we had said 1000 kg at Take Off - 166 kg penalty = 834 Kg and then used the other method 19 000 kg x .834 =15 846 Kg at Landing.

                      It all depends upon the question and what is required.

                      It could be that the question asks what additional fuel is required to arrive overhead / land with an extra 3000 kg.

                      In which case we would use the LDM +199kg. 3 x 199 = 597 kg
                      Therefore, the additional fuel at Take off is 3000 + 597 = 3 597 Kg.

                      Hope that helps

                      Mac

                      BGS TKI

                      Comment


                      • #12
                        URGENT! FP exam tomorrow. Thought I had fuel penalty questions sorted till this came up. I've being using the methodology as follows: If the Fuel Penalty is stated e.g. 199 kgs/10000kgs the fuel penalty is .801(1000 - 199 = 801) The 'extra' fuel capacity of 19000 divided by .801 = 23720 (- 19000) = 4720.Penalty. Quite a bit different from the 3781 calculated in this example. Can anyone give a definite correct method please?

                        Comment


                        • #13
                          Hi
                          Just back from leave, so hope this reaches you in time!
                          If given two penalty figures as above; one for LDM limitations and one for TOM limitations use the method above.
                          If given one figure as in your email; that is based upon TOM and is used as a ratio.
                          In practice the 2 limitation (LDM and TOM) are the type of question normally seen now.

                          Best of luck

                          Mac
                          BGS TKI

                          Comment


                          • #14
                            Hi Mac and thanks for the response! Hopefully this is my last ever exam and other than adding an IR to my licence soon, my last ever dealings with the CAA

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