Oz news reports that he has stated he was not drunk.
"Before leaving Brisbane he had only: “two Voltaren, four Panadol and two cans of Coca-Cola,” police said."
Is obnoxiously banging on the cockpit door and creating a threat of hijacking whilst sober a lessor charge than obnoxiously banging on cockpit door and creating threat of hijacking whilst drunk?
Reports are indicating that mentally he was in turmoil, rather than being drunk.