1213472-1 – Textron Aviation OEM Hinge Pin
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Overview Section
The Textron Aviation 1213472-1 is an Original Equipment Manufacturer (OEM) Hinge Pin, a flight-critical mechanical component designed to provide the pivot axis for an aircraft hinge assembly (such as the 1213261 series). Hinge pins are the load-bearing elements that retain the two halves of a hinged component (e.g., control surface, door, or cowling) together while allowing controlled rotation.
As a precision OEM component, this pin is manufactured from a high-strength, wear-resistant material (typically stainless steel or alloy steel) and is ground to extremely tight dimensional tolerances. Its critical function is to ensure the accurate alignment and low-friction pivot of the hinged component while withstanding the shear, tensile, and bending loads imposed during flight and ground operations. The integrity of the hinge assembly is entirely dependent on the quality and fit of the pin.
Key Features Section
OEM Certified Quality: Manufactured to Textron Aviation's exacting specifications for material strength, finish, and dimensional tolerance, guaranteeing certified airworthiness.
High-Strength Material: Typically made from Corrosion-Resistant Steel (CRES) or high-strength alloy steel, offering excellent resistance to wear, shear stress, and corrosion.
Precision Ground Diameter: Manufactured to a smooth, specific diameter tolerance to ensure the correct slip-fit or close clearance fit within the hinge bushings or barrels, minimizing undesirable slop (play).
Retaining Features: Designed with specific features (e.g., grooves, flats, or holes) compatible with certified locking hardware (e.g., cotter pins, safety clips, or detent pins) to prevent accidental axial withdrawal.
Wear Resistance: Acts as the primary wear element in the hinge, protecting the more expensive hinge barrels and structural fittings.
Technical Specifications Section
Part Number: 1213472-1
Component Type: Hinge Pin / Pivot Pin (Flight Control or Structural)
OEM Manufacturer: Textron Aviation (Cessna / Beechcraft)
Material: Corrosion-Resistant Steel (CRES) or Alloy Steel (Must be confirmed by CoC)
Dimensions: Exact diameter and usable length are specific to the -1 dash number.
Head/Retention: Specific head style and hole configuration for securing the pin.
Fit Tolerance: Precision tolerance for fit within the corresponding hinge barrel ID.
Application: Pivot for Flaps, Ailerons, Access Doors, or Engine Cowlings.
Governing Specifications: Certified under FAA-PMA/OEM standards; conforms to applicable NAS, AN, or MS pin specifications for materials and finish.
Aircraft Compatibility Section
Cessna Piston Series: Used in various hinge locations for control surfaces or access panels (e.g., 172, 182, 210, etc.).
Cessna Turbine Series: Used in access panels, doors, or reverse thrust cowl linkages of Citation Jets (e.g., Excel, CJ series) or Caravan models.
Beechcraft Models: May be used in various models depending on manufacturing commonality within Textron.
Note: Hinge pin length and diameter are critical. The aircraft’s Illustrated Parts Catalog (IPC) and Structural Repair Manual (SRM) are the final authority for verifying the exact part number and its specific location/use.
Applications Section
Flight Control Pivot: Securing and providing the pivot axis for control surfaces (ailerons, flaps).
Access Point Functionality: Ensuring the free and correct operation of hinged access panels and inspection doors.
Load Transfer: Transmitting shear and bending loads between the hinged component and the airframe structure.
Why Choose the 1213472-1?
The 1213472-1 is vital for maintaining the structural and kinematic integrity of the hinge. Any deviation from the OEM specification can lead to catastrophic results. Using a non-certified, soft, or incorrectly sized pin risks: 1) Excessive clearance (slop), leading to dangerous control surface flutter or vibration; 2) Rapid wear on the pin itself and the hinge barrels; or 3) Pin failure due to inadequate shear strength. The OEM pin guarantees the correct material hardness to resist wear, the certified ultimate shear strength, and the precise fit required to minimize play and maximize the service life of the entire hinge assembly.
The wear life of the 1213472-1 pin is governed by its ability to resist fretting and galling when operating against the inner diameter of the hinge barrel or bushing. In joints subjected to limited oscillatory motion (common in control systems), surface wear is accelerated. The pin's smooth, precision-ground surface finish reduces the coefficient of friction and minimizes the stress concentration factors. The correct installation requires the pin to be adequately lubricated with the specified aerospace grease to establish a separating film, which further mitigates metal-to-metal contact and drastically extends the service life of the hinge assembly. Failure to secure the pin with the correct retaining hardware can result in rapid pin migration and subsequent catastrophic joint separation.
Note: The 1213472-1 is a flight-critical component. It must be installed with the correct certified retaining hardware (cotter pin, safety clip, or specialized screw) and properly lubricated as per the Component Maintenance Manual (CMM). The fit should be checked post-installation to ensure minimal axial and radial play.
Documentation
Textron Aviation Structural Repair Manual (SRM) / Component Maintenance Manual (CMM): Essential for checking lubrication, inspection criteria, and retaining hardware requirements.
Textron Aviation Illustrated Parts Catalog (IPC): Required for definitive part number verification by assembly location.
Applicable Aircraft
- Stationair
List not comprehensive, may be applicable on other models.