A method and apparatus to switch between two audio streams without creating a clicking transient. burst zone is defined about the turbine engine and a tail is disposed at least partially with the burst zone. The FMM system identification methods\u2014basic and advanced FMM ID methods\u2014use the normal modes and natural frequencies of the mistuned bladed disk to determine sector frequencies as well as tuned system frequencies. In response to an inconsistency between the decrypted portion and the expected data, a tampering signal is generated to indicate tampering is suspected. After the trip actuator has been reset, the deflection assembly is deflectable to accommodate excess motion of the cradle assembly.