Flight path cross check

A system includes a communications system and at least one processor coupled with the communications system and with a non-transitory processor-readable medium storing processor-executable code. The communications system is configured to receive measured air data from an air sensor system and receive flight data from a flight monitoring system. The air data is indicative of at least one air characteristic of an environment surrounding an aircraft. The flight data is indicative of at least one flight characteristic of the aircraft. The processor-executable code causes the at least one processor to detect a failed state of the air sensor system based on the measure air data and the flight data, estimate air data in response to detecting the failed state of the air sensor system, and provide the estimated air data to at least one of a display device and an automated flight control system.