69494J259 - Hamilton Sundstrand Corporation Preformed Packing

69494J259 – Hamilton Sundstrand (Collins Aerospace) Preformed Packing Seal

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Overview

The 69494J259 is a flight-critical, genuine Original Equipment Manufacturer (OEM) preformed packing seal, designed and manufactured by Hamilton Sundstrand, now a part of Collins Aerospace. This component, typically an O-ring or similarly profiled static seal, is engineered for demanding applications within complex aerospace systems such as Integrated Drive Generators (IDGs), Constant Speed Drives (CSDs), fuel controls, or actuation systems. Its primary function is to create a positive, leak-free seal between stationary components, preventing the escape or ingress of fluids or gases under challenging operating conditions.

Manufactured to the exacting standards of Hamilton Sundstrand/Collins Aerospace, this seal is fabricated from a specialized elastomeric compound selected for its specific resistance to system fluids (likely synthetic oils or hydraulic fluids) and its ability to maintain sealing integrity across a wide temperature range and under significant pressure. The integrity of systems like an IDG depends critically on preventing leaks, making this seal essential for operational reliability and flight safety.

Key Features

• Genuine Hamilton Sundstrand / Collins Aerospace OEM Part: Guarantees the part is fabricated to the exact material specifications, dimensional tolerances, and quality standards required by the original equipment designer.

• Engineered for Specific System Environments: Material compound selected for compatibility with specific aerospace fluids (e.g., MIL-PRF-23699 synthetic turbine oil) and extreme operating temperatures.

• Provides Positive Static Sealing: Designed to prevent leakage between non-moving components under pressure, ensuring system integrity.

• High-Reliability Elastomer: Manufactured from a high-grade elastomeric compound (likely Fluorocarbon - FKM, but must be confirmed) chosen for its low compression set, thermal stability, and chemical resistance.

• Precision Dimensions: Manufactured to tight tolerances for a perfect fit within the designed gland or groove, ensuring optimal sealing performance.

• Flight-Critical Component: Essential for the safe and reliable operation of critical aircraft systems.

Technical Specifications

• Part Number: 69494J259

• Component Type: Preformed Packing / O-Ring Seal (Specific profile must be confirmed by OEM drawing).

• OEM Manufacturer: Hamilton Sundstrand (Collins Aerospace)

• Material: Must be confirmed by OEM documentation. Likely a specialized Fluorocarbon (FKM / Viton®) or similar high-performance elastomer designed for synthetic oils and high temperatures.

• Hardness (Durometer): Must be confirmed by OEM documentation (typically 75-90 Shore A for FKM seals).

• Dimensions: Per Hamilton Sundstrand / Collins Aerospace Engineering Drawing 69494. (Standard AS568 size equivalency cannot be assumed).

• Compatible Fluids: Must be confirmed by OEM documentation. Likely compatible with synthetic polyol ester-based turbine oils (e.g., MIL-PRF-23699) and potentially specific hydraulic fluids.

• Temperature Range: Must be confirmed by OEM documentation. Likely suitable for high-temperature applications (e.g., up to 400°F / 204°C if FKM).

• Governing Specification: Hamilton Sundstrand / Collins Aerospace Engineering Drawing 69494.

Aircraft Compatibility

This is a component-level part used within specific Line Replaceable Units (LRUs) manufactured by Hamilton Sundstrand / Collins Aerospace. It is not directly installed on an airframe but within a component. These components are used on a vast range of aircraft.

• System Application (Typical): Integrated Drive Generators (IDGs), Constant Speed Drives (CSDs), Fuel Controls, Actuators.

• Representative Aircraft Platforms (Utilizing HS/Collins Components):

  • Boeing 7-Series Airliners

  • Airbus A3XX Series Airliners

  • Bombardier Global, Challenger, CRJ Series

  • Embraer E-Jets, Phenom Series

  • Gulfstream G-Series

  • Various Military Aircraft

Note: This seal is specific to a Hamilton Sundstrand / Collins Aerospace component. Verification of applicability is the absolute responsibility of the installer. Always consult the current version of the applicable Component Maintenance Manual (CMM) or Illustrated Parts Catalog (IPC) for the higher-level assembly to confirm part number eligibility.

Applications

• Providing a static seal between housings, covers, plugs, and fittings within Hamilton Sundstrand / Collins Aerospace components.

• Preventing internal or external leakage of lubricating oils, hydraulic fluids, or control fluids.

• Critical for maintaining pressure integrity within the component.

Why Choose 69494J259?

Component-level seals within complex systems like IDGs or fuel controls are engineered with extreme precision. The material compound, durometer, and dimensions of the 69494J259 are critical for its function in a high-temperature, high-pressure, synthetic fluid environment. Using the genuine OEM part is the only way to guarantee these exact properties. A non-certified seal made from an incorrect material will rapidly fail from chemical attack or thermal degradation, leading to leaks, component failure, potential in-flight shutdowns, smoke/fumes, or even fire.

The operational environment within a component like an Integrated Drive Generator (IDG) places extreme demands on elastomeric seals such as the 69494J259. The seal must withstand continuous exposure to synthetic polyol ester-based lubricating oils (MIL-PRF-23699) operating at temperatures often exceeding 300°F (150°C), while also resisting degradation from oil additives and potential contaminants. Fluorocarbon (FKM) elastomers are frequently specified for such applications due to the inherent strength of their carbon-fluorine (C-F) molecular bonds, which provide exceptional thermal stability and resistance to chemical attack by these aggressive synthetic fluids. Furthermore, a critical property for static seals in high-temperature applications is low compression set. This measures the permanent deformation remaining after prolonged compressive stress at elevated temperature. A certified aerospace FKM seal is formulated and cured to exhibit a very low compression set, meaning it retains its elasticity and "push back" force over long periods, ensuring a reliable, long-term seal despite the harsh thermal cycling experienced within the IDG.

Note: This is a flight-critical component. It has a finite shelf life defined by standards like ARP5316, determined by its cure date. This date must be verified prior to installation. It is a single-use part; a new seal must be used every time the component is assembled. Installation must be performed by a certified technician specializing in the overhaul and repair of the specific Hamilton Sundstrand / Collins Aerospace component, in strict accordance with the Component Maintenance Manual (CMM). Meticulous cleanliness and proper lubrication with approved system fluid are mandatory.

Documentation

All technical data, including material specifications, dimensions, and installation procedures for the 69494J259 seal, are proprietary to Hamilton Sundstrand / Collins Aerospace. This information is contained within the official Component Maintenance Manual (CMM) for the higher-level assembly (e.g., IDG, CSD). No public-facing documentation is available.