B767 - Fuel Jettison system
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B767 - Fuel Jettison system
We operate two B767-300, which have a low capacity jettison rate (Only one pump in each dual pump unit is activated). For those aircrafts the manual mentions that: “Flaps 25 or 30 should not be selected when using a low capacity jettison system”.
Could someone please enlighten me as to what is the reason behind this reasoning?
Thanks in advance.
Could someone please enlighten me as to what is the reason behind this reasoning?
Thanks in advance.
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Thanks for your reply.
Indeed, it sounds quite right, however why the precaution with the low capacity jettison rate system only; is this not so ideal situation avoided with the high capacity jettison system?
Indeed, it sounds quite right, however why the precaution with the low capacity jettison rate system only; is this not so ideal situation avoided with the high capacity jettison system?
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I can't confirm now but on the fleet of 767 I work with, all have the same limitation whether the jettison system be high or low capacity .
It could just be for standardisation across the fleet because the low capacity came first with the high capacity arriving on aircraft a few years later.
Need to keep it simple
It could just be for standardisation across the fleet because the low capacity came first with the high capacity arriving on aircraft a few years later.
Need to keep it simple
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you will also notice that the jettison tubes have had an extension of 10 inchs, this was a beoing ei to try and direct fuel away from stab,originally they were straight now they have a 20 degree offset