0453003-7 – Textron Aviation OEM Cowl Support Bracket for Cessna 150/152
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Overview
The 0453003-7 is a genuine Textron Aviation (Cessna) Original Equipment Manufacturer (OEM) cowl support bracket. This is a precision-formed, semi-structural airframe component engineered for a specific location to support the engine cowling on Cessna 150 and 152 series aircraft. It serves as a critical interface, ensuring the cowling is held firmly in its correct aerodynamic and structural position relative to the firewall. The -7 dash number signifies a unique part geometry that is not interchangeable with other brackets from the same 0453003 part family.
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 -7 bracket is the only way to guarantee the correct fit and strength required for an airworthy installation in its designated location.
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.
Specific -7 Configuration: The -7 suffix denotes a unique shape, bend, and hole pattern for a specific installation point on the airframe. It is not interchangeable with other dash numbers.
Precision-Formed Sheet Metal: Manufactured on factory tooling to the exact shape required 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.
Technical Specifications
Part Number: 0453003-7
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 0453003-7.
Aircraft Compatibility
This OEM cowl support bracket is the specified component for a specific location on the classic Cessna 150 and 152 models.
Primary Aircraft Platforms:
Cessna 150 (all variants)
Cessna 152 / A152 Aerobat (all variants)
Note: The dash number (-7) is a critical part of the part number. Applicability for a specific firewall location is strictly determined by the aircraft's serial number. The aircraft's current Illustrated Parts Catalog (IPC) is the final and absolute authority for confirming part number eligibility.
Applications
Sole Application: To serve as a fixed attachment bracket for securing the engine cowling at the specific location designated for the -7 part number on the firewall of specified Cessna aircraft.
Why Choose 0453003-7?
Part number conformity is a cornerstone of aviation safety. The 0453003-7 bracket has a unique shape and hole pattern that is essential for a proper fit at its designated location. Attempting to install an incorrect dash number (such as a -2) or a locally fabricated part will result in misalignment, induce dangerous stresses in both the cowling and the firewall structure, and create an unairworthy condition. Only the genuine OEM 0453003-7 part is guaranteed to fit correctly and provide the certified structural performance required.
The dash number, such as the -7 on this 0453003 bracket, is a fundamental tool of configuration control in aerospace manufacturing. An airframe is a complex, three-dimensional assembly where hundreds of seemingly similar brackets and fittings have minute but critical differences in angle, length, or hole placement. The dash number is the engineer's primary method of ensuring that the one specific part designed for a particular location is the part that gets installed. Each dash number corresponds to a unique engineering drawing. For a maintenance technician, strict adherence to the dash number specified in the Illustrated Parts Catalog (IPC) is not optional; it is a procedural requirement that ensures the continued conformity of the aircraft to its type-certified design. This system of precise part identification and control is a cornerstone of aviation safety and reliability.
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 0453003-7 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.