An airport emergency plan (AEP) is meant to support airports in defining roles and responsibilities of stakeholders during emergencies, identifying specific threats that could affect airports, and establishing communication protocols for the airport community. The TRB Airport Cooperative Research Program's ACRP Synthesis 115: Practices in Airport Emergency Plans gathers relevant data specific to AEP practices that can effectively be applied to other airports, including general aviation airports, whether required to maintain an AEP or not.