0453003-2 – Textron Aviation OEM Cowl Support Bracket for Cessna 150/152
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Overview
The 0453003-2 is a genuine Textron Aviation (Cessna) Original Equipment Manufacturer (OEM) cowl support bracket. This is a precision-formed, semi-structural airframe component engineered to provide a secure and robust attachment point for the engine cowling on Cessna 150 and 152 series aircraft. Typically mounted to the firewall, this bracket serves as a critical interface, ensuring the cowling is held firmly in its correct aerodynamic and structural position.
Manufactured from a specific grade of aluminum alloy and formed to exact engineering drawings, this bracket is designed to withstand the significant vibrational loads from the engine and the aerodynamic pressures experienced in flight. The integrity of the cowling installation is a flight-critical concern, and using the genuine OEM bracket is the only way to guarantee the correct fit, material strength, and fatigue life required for a safe and airworthy installation.
Key Features
Genuine Textron Aviation (Cessna) OEM Part: Guarantees the part is the factory-specified and fully certified component, ensuring a perfect fit and uncompromising safety.
Precision-Formed Sheet Metal: Manufactured on factory tooling to the exact shape, with all holes and bend radii precisely located, for a stress-free, drop-in fit.
Provides Secure Cowling Attachment: Serves as a primary anchor point for cowling fasteners, ensuring the cowling remains secure under all flight conditions.
Corrosion-Resistant Finish: Treated with a primer or other protective coating per OEM specifications to prevent corrosion of the aluminum alloy.
Engineered for Fatigue Resistance: Designed to withstand the high-cycle vibrational environment of the engine compartment, preventing the formation of fatigue cracks.
Critical Airframe Component: Essential for maintaining the structural integrity of the cowling assembly and ensuring proper engine cooling airflow.
Technical Specifications
Part Number: 0453003-2
Component Type: Cowl Support Bracket / Mount
OEM Authority: Textron Aviation (Cessna)
Material: Aluminum Alloy (e.g., 2024-T3 or similar, per OEM drawing).
Finish: Primed or other protective coating per OEM specification.
Governing Specification: Textron Aviation Engineering Drawing 0453003.
Aircraft Compatibility
This OEM cowl support bracket is the specified component for the classic Cessna 150 and 152 models.
Primary Aircraft Platforms:
Cessna 150 (all variants, e.g., 150E, F, G, H, J, K, L, M)
Cessna 152 / A152 Aerobat (all variants)
Note: Verification of applicability is the absolute responsibility of the installer. The aircraft's current Illustrated Parts Catalog (IPC) for its specific serial number is the final and absolute authority for confirming part number eligibility.
Applications
Sole Application: To serve as a fixed attachment bracket, typically on the firewall, for securing the upper engine cowling on specified Cessna 150 and 152 aircraft.
Why Choose 0453003-2?
The security of the engine cowling is a critical safety-of-flight issue. The in-flight departure of a cowling panel can lead to severe aerodynamic disruption and potentially catastrophic damage to the empennage or flight control surfaces. The genuine Textron OEM 0453003-2 bracket is the only part guaranteed to be made from the correct aluminum alloy and temper, with the proper forming and hole locations for a stress-free installation. A locally fabricated or non-certified bracket may not have the required fatigue resistance and is highly susceptible to cracking and failure, which would compromise the security of the entire cowling assembly.
An engine cowling attachment bracket like the 0453003-2 is subjected to a highly complex and demanding load environment. It must withstand not only the static weight of the cowling but also significant, high-frequency vibratory loads transmitted directly from the reciprocating engine and engine mount structure. Simultaneously, it is subjected to fluctuating aerodynamic pressures—both positive internal pressures from cooling airflow and negative external pressures. These combined loads create a multi-axial stress state that makes the bracket highly susceptible to fatigue cracking, especially at the bend radii and around fastener holes. The OEM design process involves extensive Finite Element Analysis (FEA) to identify these high-stress areas, followed by rigorous fatigue testing of the final part. The specific material alloy, temper, sheet thickness, and even the radius of the bends are all critical engineering choices designed to ensure the bracket has an infinite fatigue life under normal operating conditions.
Note: This is a semi-structural airframe component. Installation must be performed by a certified A&P mechanic in accordance with the aircraft's maintenance or structural repair manual. It is typically attached to the firewall with solid rivets. When replacing this part, the surrounding structure and existing attachment holes must be carefully inspected for any signs of cracking, elongation, or "working" rivets, which would indicate a larger structural issue.
Documentation
All technical data, including material specifications and installation procedures for the 0453003-2 bracket, are proprietary to Textron Aviation. This information is contained within the official Maintenance Manual, Structural Repair Manual, and Illustrated Parts Catalog for the applicable Cessna model. No public-facing documentation is available.