0531006-87 - ​Textron Aviation Cessna OEM Rib Assembly for Skyhawk Aircraft

0531006-87 – Textron Aviation Cessna OEM Rib Assembly (Vertical Fin)

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Overview

The Textron Aviation 0531006-87 is a genuine OEM, flight-critical structural Rib Assembly for the vertical stabilizer (fin) on a wide range of Cessna 172 Skyhawk aircraft. This is a primary airframe component that serves as a key internal structural element of the vertical fin. Its function is to create and maintain the precise aerodynamic shape of the fin's airfoil and to transfer aerodynamic loads from the fin's skin to the rear spar and other structural members.

Manufactured from high-strength, aerospace-grade aluminum alloy, this rib is precision-formed and stamped to the exact factory specifications. The structural integrity of this component is essential for maintaining the directional stability and control of the aircraft. A damaged or corroded rib can compromise the entire empennage structure, making the use of a certified, genuine OEM part a non-negotiable requirement for an airworthy repair.

Key Features

• Genuine Textron Aviation OEM Part: The original, factory-specified component, guaranteeing a perfect fit, form, and function for a structural repair.

• Flight-Critical Structural Component: Serves as a primary internal rib of the vertical stabilizer, essential for aerodynamic shape and structural integrity.

• High-Strength Aluminum Construction: Fabricated from aerospace-grade aluminum alloy for an optimal strength-to-weight ratio and fatigue resistance.

• Precision Stamped & Formed: Engineered to exact Textron (Cessna) specifications to ensure perfect alignment with the fin spar and skin.

• Corrosion-Resistant Finish: Typically treated with a chemical conversion coating (Alodine) and/or primer to protect against corrosion and environmental degradation.

Technical Specifications

• Part Number: 0531006-87

• Component Type: Rib Assembly, Vertical Stabilizer (Fin)

• OEM Manufacturer: Textron Aviation (Cessna)

• Material: Aerospace-Grade Aluminum Alloy

• Finish: Corrosion-Inhibiting Primer / Chemical Conversion Coating

• JASC Code: 5510 - Stabilizer, Vertical

Aircraft Compatibility

• Cessna (Textron Aviation): 172 Skyhawk (including 172E, 172M, 172N, 172P, 172Q, 172RG, and others).

Note: This is a flight-critical structural component. Applicability can vary by aircraft serial number. The aircraft's specific Illustrated Parts Catalog (IPC) and Structural Repair Manual (SRM) are the final and absolute authorities for determining part applicability.

Applications

• Vertical Stabilizer Structure: Functions as an internal form-and-strength member for the vertical fin.

• Airframe Structural Repair: The certified component for replacing a worn, cracked, or corroded original rib during a major empennage repair or aircraft restoration.

Why Choose 0531006-87?

The vertical fin is the cornerstone of the aircraft's directional stability. The 0531006-87 rib is a primary structural part within that assembly. Using a non-certified, "will-fit," or improperly repaired part introduces an extreme risk of structural failure, which could lead to a catastrophic loss of control. The genuine Textron OEM part is the only component guaranteed to be manufactured from the correct, certified alloy and to the precise dimensions required to safely carry and transfer flight loads. For the safety and airworthiness of your aircraft, there is no substitute.

The engineering function of the 0531006-87 rib is twofold: it is both an aerodynamic form and a shear-web. First, its precisely curved flanges create the exact airfoil shape required for the vertical fin, ensuring proper aerodynamic performance and directional stability. Second, the solid web of the rib acts as a shear panel, transferring the aerodynamic side-loads (from rudder deflection or yaw) from the thin aluminum skin into the more robust vertical fin spar. This prevents the fin's skin from buckling under load. The formed lightening holes are not just for weight reduction; their flanged edges add significant stiffness to the web, allowing it to resist these shear forces more effectively.

Note: The 0531006-87 is a primary structural component. Installation must be performed by a certified A&P/IA mechanic with structural experience, in strict accordance with the Textron Aviation maintenance and structural repair manuals. This part is not a simple "bolt-on" and will require the precise installation of structural rivets.

Documentation

No public-facing OEM specification sheet was located for this proprietary part number. All authoritative technical data, installation procedures, and inspection criteria are contained within the official Textron Aviation Model 172 Series Maintenance Manual, Structural Repair Manual (SRM), and Illustrated Parts Catalog (IPC).