<div class="htmlview paragraph">This paper describes a multiphase technical study, currently under contract with the FAA Technical Center, that has defined two advanced inflight smoke/fire detection system approaches for commercial jet aircraft. Four specific areas are being studied; sensing, alerting, crew response and crew decision making. The objective of Phase I was to identify system concepts that would provide for accurate, timely, and complete guidance to the flight crew for their use in responding to inflight smoke and fire events within the pressurized fuselage. Phase II of this contract, currently in work, will result in the functional test and demonstration of the prototype system concepts defined in Phase I.</div>