Abstract: An aircraft data analysis computer program and method that allows user-defined measurements to be made on a set of flight data obtained from a variety of sources. Post-flight measurement and trending analysis software provides a user configurable measurement system using user-defined measurement definitions for analyzing flight data from a variety of sources. Measurements that require nonsequential analysis of the sequential flight data file can be performed. Data from a variety of aircraft types, from a variety of flight data recorders and from other sources of flight data can be analyzed by translating the data into fleet-independent terms, so that the performance of different fleets or different aircraft types can be compared. The user can perform trending, characterization and statistical analyses on the flight data information. The results of the user-defined measurements are stored in a flight analysis database and may be viewed by the user in a variety of display formats.