Abstract: An aircraft engine nacelle door operating system locking manual drive unit includes a housing, an input drive shaft, an output drive shaft, a lock shaft, and a lock spring. The input drive shaft, the output drive shaft, and the lock shaft are all rotationally mounted in the housing. The output drive shaft continuously engages and mates with the input drive shaft, and he lock shaft extends at least partially into and engages the input drive shaft. The lock shaft is movable between a lock position, in which it engages and mates with the output drive shaft, and an unlock position, in it is disengaged from the output drive shaft. The lock spring supplies a bias force to the lock shaft that urges the lock shaft toward the lock position.

Abstract: A system and method are provided for controlling the movement of an aircraft engine cowl door between an open position and a closed position. The system includes an electric motor, at least one actuator, and an electrically operated brake. The actuator is coupled to the motor and is operable to move the cowl door between the closed and the open position. The electrically operated brake is coupled to the electric motor and the at least one actuator and is configured, upon being energized, to supply a unidirectional resisting torque load to the electric motor that does not prevent motor rotation.

Abstract: An aircraft engine nacelle door operating system locking manual drive unit includes a housing, an input drive shaft, an output drive shaft, a lock shaft, and a lock spring. The input drive shaft, the output drive shaft, and the lock shaft are all rotationally mounted in the housing. The output drive shaft continuously engages and mates with the input drive shaft, and he lock shaft extends at least partially into and engages the input drive shaft. The lock shaft is movable between a lock position, in which it engages and mates with the output drive shaft, and an unlock position, in it is disengaged from the output drive shaft. The lock spring supplies a bias force to the lock shaft that urges the lock shaft toward the lock position.

Abstract: A system and method are provided for controlling the movement of an aircraft engine cowl door between an open position and a closed position. The system includes an electric motor, at least one actuator, and an electrically operated brake. The actuator is coupled to the motor and is operable to move the cowl door between the closed and the open position. The electrically operated brake is coupled to the electric motor and the at least one actuator and is configured, upon being energized, to supply a unidirectional resisting torque load to the electric motor that does not prevent motor rotation.

Abstract: An actuation system is provided for a variable area fan nozzle assembly of an aircraft. The actuation system includes a motor configured to generate a torque; a nozzle; and a drive coupling assembly coupled to the motor and the nozzle. The drive coupling assembly includes a first position in which the torque from the motor is transferred to the nozzle to translate the nozzle and a second position in which the torque from the motor is not transferred to the nozzle. The drive coupling assembly includes a first end portion and a second end portion, the first and second end portions mating with one another in the first position and disengaged from one another in the second position.

Abstract: An actuator mounting assembly includes a cap, a rod, a spring mechanism, and a switch assembly. The cap is adapted to couple to an actuator. The rod extends through the cap and includes a first end adapted to extend through the actuator and a second end adapted to attach to a fixed location. The spring mechanism is disposed in the cap cavity, is compressible, and has a predetermined preload. The switch assembly is disposed in the cap and adapted to sense relative positioning between the rod and the cap and to provide signals based on the sensed relative positioning. When the rod and the cap are in a first relative position, the switch assembly provides a first signal to the actuator to allow the cap to move axially relative to the rod, but when in a second relative position, the switch assembly discontinues providing the first signal to the actuator.

Abstract: An actuator mounting assembly includes a cap, a rod, a spring mechanism, and a switch assembly. The cap is adapted to couple to an actuator. The rod extends through the cap and includes a first end adapted to extend through the actuator and a second end adapted to attach to a fixed location. The spring mechanism is disposed in the cap cavity, is compressible, and has a predetermined preload. The switch assembly is disposed in the cap and adapted to sense relative positioning between the rod and the cap and to provide signals based on the sensed relative positioning. When the rod and the cap are in a first relative position, the switch assembly provides a first signal to the actuator to allow the cap to move axially relative to the rod, but when in a second relative position, the switch assembly discontinues providing the first signal to the actuator.