Originally Posted by
Cubdriver
On the steep spiral question, you absolutely can unport the fuel taps doing steep spirals on the descent. You need to keep the fuel loads balanced left to right by alternating direction of turn on the hops. Do not get past your allowable load/ hop count, and I discourage playing with the fuel selector to balance tanks because you will forget to select it to "both" sooner or later. The gauges are not trustworthy on old 182s either, so do not use that to do it.
How is this happening if flight is coordinated?
I've flown me lots of C182, and something I've noticed is that certain older ones are notorious for not burning out of tanks equally during all flight maneuvers and especially S&L when on "both", even leading to fuel starvation issues as at least one was not taking fuel out of one side reliably, even when selected, but other than that, how would a steep spiral cause one side to be uncovered, unless you are yawing the whole way in a slip?, which wouldn't be the best way to drop altitude as far as stresses on the aircraft in any case.