The last one was issued on January 18, 2018 regarding a 9/11-style “jammed” into unlocked cockpit attack due to the lack of cockpit Installed Physical Secondary Barriers (IPSB) to protect pilots after unlocking cockpit doors to sleep, eat, or use the lavatory:

https://www.whistleblower.org/press/office-special-counsel-backs-whistleblower-further-aviation-security-breakdowns

Last week’s citing a potential plot using a synthetic opioid such as fentanyl or carfentanil, and the unwritten rule banning surprise law enforcement "open and look" checks into trucks —entering the airport operatations areas—with cargo bays containing religious flight meals:

https://www.whistleblower.org/press/whistleblower-agency-orders-new-investigations-aviation-security-breakdowns-exposed-air​​​​​​​