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.
Auxiliary Tank FQI Off-scale Low
in C-130 Technical
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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.