Patent ID: 7726134

Claim:
A driver simulator for performing maintenance on a gas turbine engine assembly that includes an engine control unit and a gas turbine engine including at least one variable stator vane assembly, at least one variable bypass valve, a hydromechanical unit that is configured to be electrically coupled to the engine control unit and includes a first servo motor operatively coupled to the at least one variable stator vane assembly and a second servo motor operatively coupled to the at least one variable bypass valve, the engine control unit configured to transmit a control signal to the hydromechanical unit to facilitate operating at least one of the first servo motor and the second servo motor, said driver simulator comprising: a first system configured to be electrically coupled to the hydromechanical unit and configured to reposition the variable stator vane assembly from a first operational position to a second operational position; and a second system configured to be electrically coupled to the hydromechanical unit and configured to reposition the variable bypass valve from a first operational position to a second operational position, said driver simulator configured to removably couple at least one of said first system and said second system to the hydromechanical unit to operate at least one of the first servo motor and the second servo motor when the engine control unit ceases to transmit the control signal to the hydromechanical unit.