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Guest fullflapsplease

X-FEED CONFIG error?

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Guest fullflapsplease

Hi guys,everytime the EICAS tells me to go to tank to engine and I go to the o/head, turn off the main over ride pumps then switch the x-feed valve over I gat an EICAS bleeper and alert go off which I duly cancel.Can anyone tell me why this maybe happening as I am following the procedure they use in the VIR19 video and they don't get an alert??Cheers.Mark.747400.jpg

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Guest Callmecapt

Make sure all tanks are EQUAL when you go tank to engine. If they are not equal, you will get a warning and you will have to configure your pumps and crossfeed valves to burn off fuel in the offending tank to make sure all tanks are equal.Also, I don't think it makes a difference, but close the crossfeed valves first, then turn off the override pumps.Goran

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here's how it can happen:tank 2 equalises with tank 1 - result 'tank to engine' is triggeredBUTtank 3 is NOT yet equal to or less than tank 4, so when you go tank to engine you get the x-feed error. Remember - tank to engine should be set only when 2<=1 AND 3<=4next time wait until BOTH 2 and 3 are equal or less than 1 and 4 respectively - THEN go tank to engine.typically tank 2 is a little less than 3 since the apu was burning fuel from 2 on the ground, so it will equalise with 1 before 3 equalises with 4 - that's what happens with me anyway.I wondrer then why 'tank to eng' is triggered when only one condition is met?Gurus please correct me if any or all of this is hogwash.regards,Markhttp://www.precisionmanuals.com/images/forum/747400.jpgXPHomeSP2/FS9.1/3.2HT/1024mb/X700pro256


Regards,

Mark

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Guest fullflapsplease

Cheers, guys, I'll be giving it a whirl in a bit ;)Mark.747400.jpg

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