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Auxiliary Tank FQI Off-scale Low


Pebbles
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We have experience a few incident of LH Aux FQI went to off-scale LOW on two aircraft. When open tank and found the Fuel Qty Compensator cracked and dislodged. Subsequent check found the bladder cell actually collapse as the strings tie the cell to the structure have given way. Have anyone experience this. Can the Aux Tank pump pressure caused the problem when the tank is empty ie. the pump running.

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  • 6 years later...
On 7/30/2013 at 4:13 PM, Pebbles said:

We have experience a few incident of LH Aux FQI went to off-scale LOW on two aircraft. When open tank and found the Fuel Qty Compensator cracked and dislodged. Subsequent check found the bladder cell actually collapse as the strings tie the cell to the structure have given way. Have anyone experience this. Can the Aux Tank pump pressure caused the problem when the tank is empty ie. the pump running.

did you figure out the reason for the collapse

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  • 1 year later...

The collapse can be cause by a pressurisation leak from the cargo compartment into the centre wing. I saw it happen on an RNZAF hers, was just a few empty bolt holes on the forward spar from a bracket or component which was no longer fitted I think? was a long time ago.

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