Methods and systems for providing a depressurization alert. An example method includes receiving a cabin depressurization discrete signal, determining if the cabin depressurization discrete signal is valid, and issuing a cabin depressurization alert, if the cabin depressurization discrete signal was...http://www.google.com/patents/US7670214?utm_source=gb-gplus-sharePatent US7670214 - Systems and methods for intelligent alerting for cabin altitude depressurization
