PEI 3721
Sorry, but that is exactly what I was saying. Lateral, direct or 'out of the box' thinking is required. In my experience, MEL rectifications and alleviations follow simple consequential paths and usually, but do not always, anticipate knock-on effects, particularly when multiple failures are involved.. The resultant effects can be dire if the rectification process addresses an apparently simple fault which is, in fact, just a symptom of a far larger problem. A classic case of treating the symptoms rather than the disease itself. This appears to be what happened in this incident.