Answers to such a question in a public forum will have no bearing on what will transpire officially esepcially if you rely on answers that include "Probably OK...", "Should be OK...".

An expired passport is no longer "valid", hence would not be correctly accepted on its own merits. Having said that, you are at risk of having it accepted or not, of being slowed down or allowed through, as it is a human who will make the decision, rightly or wrongly, at the given moment.