5906-2SA5 - Barry Controls Turbine Engine Vibration Isolator for King Air Aircraft

5906-2SA5 – Barry Controls Turbine Engine Vibration Isolator for King Air Aircraft

Available now on the Airparts.aero Marketplace.

Overview

The Barry Controls 5906-2SA5 is a genuine OEM-quality, FAA-PMA approved engine vibration isolator, specifically engineered for the Dynafocal engine suspension system of the Beechcraft King Air 90 series of aircraft. Manufactured by Barry Controls (a division of Hutchinson), a world leader in vibration and shock control technology, this mount is a flight-critical component that supports the Pratt & Whitney Canada PT6A turboprop engine. It is designed to absorb and dampen the engine's intense, high-frequency vibrations, preventing them from transmitting to the airframe, which results in a smoother, quieter cabin and a significant reduction in structural fatigue.

Key Features

• Tuned Elastomeric Damping: Utilizes a proprietary, high-damping elastomer (a specialized synthetic rubber compound) chemically bonded to steel plates. The elastomer's specific durometer (hardness) and damping coefficient are precisely tuned to isolate the unique vibrational frequencies generated by the PT6A engine at various power settings.
• Dynafocal Suspension Design: Engineered to be installed as part of a complete set in a "Dynafocal" configuration. This means the mounts are installed at a specific compound angle so their axes of maximum flexibility intersect at the engine's center of gravity, providing the most efficient isolation of rotational and torsional vibrations.
• High-Strength Bonded Construction: The bond between the elastomer and the corrosion-resistant steel plates is a critical chemical bond, created under immense heat and pressure. This process ensures the bond is stronger than the elastomer itself, preventing delamination and failure under the constant G-loads, torque, and vibration of flight.
• Superior Material Stability: The specialized elastomer is formulated to resist degradation, hardening, and "compression set" from long-term exposure to the heat, fluids, and ozone present in the engine nacelle, ensuring a long and reliable service life.
• FAA-PMA Certified: As a certified FAA-PMA part from a leading OEM supplier, it has been rigorously tested to meet or exceed the performance, safety, and quality standards of the original Textron Aviation part, making it a fully airworthy and trusted replacement.

Technical Specifications

• Part Number: 5906-2SA5
• Component Type: Dynafocal Engine Vibration Isolator Mount
• Elastomer Material: Proprietary High-Damping Synthetic Rubber Compound
• Metal Components: High-Strength, Corrosion-Resistant Steel
• Primary Engine Application: Pratt & Whitney Canada PT6A Series
• Certification: FAA-PMA

Aircraft Compatibility

The Barry Controls 5906-2SA5 is the specified engine mount for the iconic Beechcraft King Air 90 series of turboprop aircraft.

• Primary Aircraft Models:
  • Beechcraft King Air: 90, A90, B90, C90, E90, F90 Series

Applications

The 5906-2SA5 is a flight-critical component with several key roles:

• Primary Engine Support: Serves as a primary structural link between the engine and the engine mount frame, supporting the full static and dynamic weight of the powerplant.
• Vibration & Noise Isolation: Its main function is to protect the airframe, instruments, and occupants from the damaging and fatiguing effects of engine vibration, resulting in a smoother and quieter flight.
• Torque Management: Designed to react to and manage the high torque produced by the turboprop engine during power changes.
• Scheduled Maintenance Item: These mounts are life-limited components that must be inspected regularly for elastomer condition and replaced as a complete set when they reach their service limits or show signs of deterioration.

Why Choose 5906-2SA5?

Worn and hardened engine mounts are a primary cause of increased cabin vibration and noise, and can lead to costly fatigue cracking in the engine mount, firewall, and other airframe structures. Using a genuine Barry Controls 5906-2SA5 mount ensures the vibration isolation system performs exactly as the aircraft's engineers intended. The specific, tuned properties of the elastomer are critical for performance. For a component so essential to both passenger comfort and long-term structural integrity, there is no substitute for the proven performance and certified quality of a Barry Controls mount.

Order Your 5906-2SA5 Engine Mounts Now

Restore the smooth, quiet comfort of your King Air and protect your airframe from damaging vibration. Visit Airparts.aero to order your Barry Controls 5906-2SA5 engine mounts today.

The Barry Controls 5906-2SA5 functions as a tuned spring-mass-damper. The "spring" action is provided by the elastomer's elasticity, which deflects under vibrational loads. The "damper" action is provided by the elastomer's internal friction (hysteresis), which converts the mechanical energy of vibration into low-level heat, dissipating the energy rather than transmitting it. The "Dynafocal" alignment of these mounts creates a suspension system where the "soft axis" of each mount is pointed at the engine's center of gravity. This allows the engine to oscillate with a gentle rocking motion around its own CG, effectively decoupling its primary vibrational modes from the rigid airframe structure. Replacing the mounts as a complete, matched set is critical to maintain this finely tuned balance.

FAA Eligibility: [ Click Here ]
Alternate Part Numbers: LM-412 SA11, 50-389133-15

A mechanical vibration isolator is a flexible support used to decouple a material from forced vibration. Springs are commonly used as isolators to minimize the transmitted vibrational force. These springs may involve steel coil, rubber, pneumatic, fluid damping, or combination of one or more.

Fits In:

1. ·         Textron Aviation Beechcraft King Air 100 - all variants
2. ·         Textron Aviation Beechcraft King Air 200 - all variants
3. ·         Textron Aviation Beechcraft King Air 90 - all variants

Note: Engine mounts are flight-critical components and should always be replaced as a complete set to ensure uniform performance and prevent uneven loading. Installation must be performed by a certified A&P mechanic in strict accordance with the current Textron Aviation maintenance manual. Pay close attention to the installation orientation and the specified torque values for all mounting hardware.