The Skip-Level Question Set

I am running skip-level one-on-ones with my direct reports' teams: [MY ROLE, TEAM SIZE, WHAT I SUSPECT BUT CANNOT SEE FROM MY SEAT]. Give me the question set: openers that do not feel like an interrogation, the questions that surface what my managers are filtering out, the ones about me that people will only answer if I ask them right, and the closing question that turns venting into something actionable. Include the ground rule I state up front so this does not poison the manager relationship, and what I do with what I hear.