Thread: Flight Cost Index
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Old 09-11-2010, 06:15 PM
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captscott26
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Originally Posted by ULSK View Post
Dear All

I know that pilots enter the cost index figure (optimum cost index given in the flight plan) to the FMGS before the departure.
I want to know if we (flt plan & pilots) use a Cost Index less than the optimum figure (CI-25 instead of CI-40) will it save more fuel than using the optimum cost index. (supposing the time difference is only 2-3 minutes).

And if an airline practices this for a long time is there any bad effects for the aeroplane performance.

Rgds/ULSK
Well, by definition, I would say that using a lower CI than optimum on the bus would result in an increase is fuel savings. However, this would result in higher operating costs due to an increase in time. Optimum is optimum for a reason.
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