Are most airlines requiring fuel uplift calculations by crew
Join Date: Mar 2007
Location: Another Planet.
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ONCE UPON A TIME.........
"Dripsticks, refueling manuals....God, my life is easy."
Relax, that was the old days when men were men and had sheep for breakfast, hopefully not in the biblical sense.........................................
Relax, that was the old days when men were men and had sheep for breakfast, hopefully not in the biblical sense.........................................
Nexialist
Join Date: Jul 2003
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To give an idea of what you do with a bit of fuel, an example from my dad's first job as a petrol station attendant. (Same principle applies)
Local cement firm had an account, ran about 40 cement lorries. They had 50 gallon tanks. Standard chit chat when driver comes in, followed by "one for you, and one for me?" 48 gallons delivered. Dad writes out chit for 50 gallons, gives driver the price of a gallon, he now has 2 gallons "in the tanks" - repeat as necessary.
Private driver comes in later in the week, "10 gallons" he says, dad duly pumps "his" 10 gallons in, and collects the cash from the driver, goes into pocket.
Everybody's books look right, with the exception of the cement firm, who may have sharp words with the lorry supplier, as they use about 4% more fuel than advertised. But b cement tricks spend a lot of time idling, and don't do to much long distance work, so they probably never noticed.
Anybody remember a "shot of redex, for upper cylinder lubrication" if you were paying cash at a serviced petrol station, the cash went in the pocket of the attendant, and the redex never went in your tank.
These are just 2, and don't need the involvement of the management. Imagine what you can do if you own the place?
Local cement firm had an account, ran about 40 cement lorries. They had 50 gallon tanks. Standard chit chat when driver comes in, followed by "one for you, and one for me?" 48 gallons delivered. Dad writes out chit for 50 gallons, gives driver the price of a gallon, he now has 2 gallons "in the tanks" - repeat as necessary.
Private driver comes in later in the week, "10 gallons" he says, dad duly pumps "his" 10 gallons in, and collects the cash from the driver, goes into pocket.
Everybody's books look right, with the exception of the cement firm, who may have sharp words with the lorry supplier, as they use about 4% more fuel than advertised. But b cement tricks spend a lot of time idling, and don't do to much long distance work, so they probably never noticed.
Anybody remember a "shot of redex, for upper cylinder lubrication" if you were paying cash at a serviced petrol station, the cash went in the pocket of the attendant, and the redex never went in your tank.
These are just 2, and don't need the involvement of the management. Imagine what you can do if you own the place?
can you tell me what is fuel discrepancy?
Last edited by Capn Bloggs; 7th Feb 2014 at 11:13. Reason: Grammar!
How Long is a piece of String?
can you tell me what is fuel discrepancy?
It could be the difference between the actual uplift of fuel and the calculated uplift. (A volume EG Litres)
EG. If you start with 3000KG of fuel on board, and you actually need a block fuel figure in tanks of 11000KG then you will need to add 8000KG which with an SG of say .800 is 10000Litres.
If you uplift 10300 Litres to achieve a fuel indicated gauge reading of 11000KG then your discrepancy is +300 litres or 3% of the uplift (or 2.72% of the Gauge Total)
Or it could be the difference between what the aircraft fuel gauges are showing and the calculated sum of fuel uplift and fuel remaining before fuelling.
EG As above, gauges at start show 3000KG. When you finish they may show 11300KG.
If you have added say 10000Litres of fuel (8000KG) then the difference between the sum of 8000KG & 3000KG and 11300KG on the gauge gives you a discrepancy of 300KG. Or 2.65%
Some companies have the most bizarre ways of working out discrepancies. Some logical, some not so.
