S2065-1 – Textron Aviation Electric Flap Actuator Assembly
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The S2065-1 is a genuine Textron Aviation (Cessna) OEM, flight-critical electromechanical flap actuator assembly. This component is the heart of the electric wing flap system on a vast range of Cessna single-engine aircraft. Its function is to convert electrical energy from the aircraft's bus into the powerful mechanical force required to extend and retract the wing flaps, allowing the pilot to reconfigure the wing for low-speed flight during takeoff and landing.
This is a complete, integrated assembly that includes a high-torque DC electric motor, a multi-stage reduction gearbox, a robust jack screw drive, and all internal limit switches and position sensors. The reliability of this actuator is paramount for flight safety, as a failure of the flap system can create a serious in-flight emergency. As a genuine Textron OEM part, the S2065-1 is guaranteed to meet the strict performance, endurance, and quality standards of the aircraft's original type design.
Key Features
Genuine Textron Aviation OEM Part: Guarantees perfect mechanical fit, electrical compatibility, and performance characteristics for the aircraft's certified flight control system.
Provides Mechanical Force for Flap Operation: The primary drive unit that extends and retracts the wing flaps in response to pilot commands.
High-Torque DC Electric Motor: A powerful, purpose-built electric motor designed to handle the high aerodynamic loads placed on the flap surfaces.
Integrated Up/Down Limit Switches: Internal microswitches automatically cut power to the motor at the full-up and full-down travel limits, protecting the motor from burnout and the airframe from over-travel damage.
Includes Flap Position Transmitter: An internal position sensor (typically a potentiometer) provides a continuous signal to the flap position indicator in the cockpit, giving the pilot accurate situational awareness.
Robust Jack Screw Mechanism: The rotary motion of the gearbox is converted to powerful linear motion via a self-locking jack screw, which prevents aerodynamic loads from back-driving the flaps.
Technical Specifications
Part Number: S2065-1
Component Type: Electromechanical Flap Actuator Assembly
OEM Manufacturer: Textron Aviation (Cessna).
Input Voltage: 14 VDC or 28 VDC (as specified by the particular aircraft electrical system).
Mechanism: DC Electric Motor, Reduction Gearbox, and Jack Screw Drive.
Internal Components: UP/DOWN travel limit switches, flap position transmitter.
Aircraft Compatibility
The S2065-1 is the specified electric flap actuator assembly for a vast range of Textron Aviation (Cessna) single-engine aircraft. Common applicable models include, but are not limited to:
Cessna 172 Skyhawk (many models)
Cessna 180, 182 Skylane, 185 Skywagon
Cessna 206 Stationair, 207 Skywagon
Cessna 210 Centurion
Crucial Note: The specific aircraft model and serial number must be checked against the latest revision of the official Textron Aviation (Cessna) Illustrated Parts Catalog (IPC) to ensure correct part number applicability.
Applications
Primary drive unit for the wing flap extension and retraction system.
Replacement for actuators with a failed motor, worn gearbox, inoperative limit switches, or a faulty position transmitter.
Why Choose S2065-1?
Choosing the genuine Textron S2065-1 is a critical decision for flight safety. The wing flap system is a primary flight control during critical phases of flight. A failure, such as a "split flap" condition where one flap moves and the other does not, can create a severe asymmetrical lift situation that may be difficult or impossible to control. The genuine OEM actuator is the only part that is guaranteed to have the correct motor speed, torque output, and precisely calibrated limit switch settings for your specific aircraft model. Using a non-certified part or an unapproved repair risks a complete failure of the flap system at the worst possible moment.
The S2065-1 actuator's ability to hold its position against aerodynamic loads is a function of its Acme-threaded jack screw drive. This mechanism converts the rotary motion of the gearbox into linear motion with a massive mechanical advantage. A critical, inherent property of a shallow-angle Acme thread is that it is self-locking or non-backdriving. This means that an axial force applied to the actuator's output shaft (i.e., the aerodynamic pressure on the flaps) cannot cause the screw to rotate and retract. The friction in the threads is greater than the force trying to back-drive it. The actuator's travel limit switches are equally critical for system longevity. These are typically microswitches positioned at the ends of the jack screw's travel. As the traveling nut on the screw reaches its physical limit, it depresses the switch's lever, which is wired in series with the motor's "UP" or "DOWN" field winding. This action breaks the electrical circuit, providing a positive and reliable stop. This prevents the motor from stalling against a hard mechanical stop, an event that would draw excessive current, trip the circuit breaker, and eventually lead to motor burnout.
Note: This is a flight-critical flight control system component. Replacement and the subsequent rigging of the flap system are critical maintenance tasks. After installation, the system must be functionally tested through its full range of motion to verify proper travel, correct limit switch operation, and accurate position indication. This work must be performed by a certified A&P mechanic in strict accordance with the Textron/Cessna maintenance manual for the specific aircraft model.
Documentation
The definitive part number applicability and all installation and rigging procedures are detailed in the applicable Textron Aviation (Cessna) Illustrated Parts Catalog (IPC) and Maintenance Manual for the specific aircraft model and serial number.