0523921 – Textron Aviation OEM Legacy Inboard Wide Wing Flap Bearing Roller Assembly
Available now on the Airparts.aero Marketplace.
Overview
The Textron Aviation 0523921 is a genuine OEM wide-profile inboard flap roller, a flight-critical component essential for the proper function of the wing flap systems on a vast range of Cessna single-engine aircraft. This roller is specifically designed for the inboard position on the flap carriage, where it bears significant loads as it guides the flap assembly along the wing-mounted tracks. Manufactured from a high-strength, low-friction polymer to Textron's exact specifications, the 0523921 ensures smooth, reliable, and binding-free flap operation, which is paramount for safe takeoffs, approaches, and landings.
Key Features
- High-Strength Polymer Construction: Molded from a durable, wear-resistant polymer engineered to provide an optimal balance of low friction for smooth travel and high compressive strength to handle the aerodynamic loads imparted on the inboard section of the flaps.
- Wide Profile for Load Distribution: The wide (0.500") profile creates a broad bearing surface that evenly distributes loads within the flap track. This is especially important for the inboard rollers, which handle high stress, and it minimizes wear on both the roller and the aluminum flap track.
- Ensures Smooth Flap Travel: The precision-molded, smooth surface of the roller allows the flap to travel with minimal resistance. This prevents binding that could over-stress the flap actuator motor, cables, and drive components, and helps ensure symmetrical flap deployment.
- Direct Fit Replacement: As a genuine Textron Aviation OEM part, it is manufactured to the exact dimensional tolerances of the original component, guaranteeing a perfect fit on the roller axle and within the inboard flap track for specified Cessna models.
- Flight-Critical Safety Component: Worn or failed inboard flap rollers can lead to flap system jamming or asymmetrical flap extension (a "split flap" condition), which is a serious in-flight control emergency. This OEM part restores the system's original integrity.
Technical Specifications
- Part Number: 0523921
- Component Type: Inboard Wide Flap Track Roller Bearing
- Material: High-Strength, Low-Friction Polymer
- Dimensions:
- Outside Diameter: 0.875 inches
- Width: 0.500 inches
- Axle/Bolt Size: 1/4 inch
- Certification: FAA Production Approval
Aircraft Compatibility
The 0523921 inboard flap roller is the specified OEM part for many of Cessna's most popular single-engine aircraft. It is imperative to consult the specific aircraft's Illustrated Parts Catalog (IPC) for final verification and to confirm its position within the flap assembly.
- Compatible Aircraft Models (Examples):
- Cessna 172 Skyhawk
- Cessna 177 Cardinal
- Cessna 182 Skylane
- Cessna 206 Stationair / Turbo Stationair
- Cessna 210 Centurion / Turbo Centurion
Applicable Textron Aircraft
- Caravan or Grand Caravan EX
List not comprehensive, may be applicable on other models.
Applications
The 0523921 is the specified component for maintaining the health and safety of the flap system:
- Flap System Maintenance & Overhaul: A mandatory inspection item during annual and 100-hour inspections. Rollers must be checked for cracks, flat spots, and excessive wear. It is a key replacement part during a complete flap system overhaul.
- Repair of Binding or Asymmetrical Flaps: A primary component to replace when troubleshooting flaps that are difficult to operate, make excessive noise, or deploy unevenly.
Why Choose 0523921?
The safe and predictable operation of an aircraft's flap system is fundamental to flight safety. Using a genuine Textron Aviation 0523921 OEM roller ensures that the component has the correct material properties to resist wear and the precise dimensions to prevent binding within the inboard track. Non-certified parts may be made from inferior materials that can crack, swell with moisture, or deform under load, leading to a jammed flap. For a component so critical to the flight control system, there is no substitute for the quality and airworthiness assurance of a genuine OEM part.
Order Your 0523921 Flap Rollers Now
Ensure the safe, smooth, and reliable operation of your aircraft's flap system with genuine Textron Aviation components. Visit Airparts.aero to order your 0523921 inboard wide flap rollers today.
The 0523921 inboard roller is a key part of the Fowler flap systems used on many Cessna aircraft. These systems extend the flaps aft on a carriage that rides in tracks, increasing the wing's area and camber. The inboard and outboard rollers on this carriage work in concert to ensure the flap remains perfectly aligned as it moves through its complex path. The inboard roller (0523921) often carries a higher portion of the initial load as the flap begins to extend. Its dimensional stability and wear resistance are therefore critical to prevent the flap carriage from canting or binding, which would put extreme stress on the entire actuation mechanism, from the motor to the drive cables and bellcranks.
Note: This is a flight-critical component. Installation must be performed by a certified A&P mechanic in accordance with the current Textron Cessna maintenance manual. It is highly recommended to replace all rollers on a flap carriage simultaneously to ensure even wear and smooth operation.
