for those who don't know

http://www.homelandsecuritynewswire.com/boeing-wins-patent-uninterruptible-autopilot-system

https://www.flightglobal.com/news/articles/diagrams-boeing-patents-anti-terrorism-auto-land-system-for-hijacked-210869/

>patent

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=7142971.PN.&OS=PN/7142971&RS=PN/7142971