Onboard Systems has developed a hydraulic cargo hook kit for the Eurocopter EC130 aircraft, which was developed in response to customers seeking an alternative to the OEM cargo hook equipment. In addition to the hydraulic release, the new kit features:

  • Gimbal Frame — Our gimbal frame distributes weight between the four cables more effectively than a rigid frame to ensure balanced load sharing throughout the aircraft.
  • Built-in Bumper Ring — A polymer bumper ring and built-in travel limits prevent both the hook and control cables from impacting the frame and causing damage that could lead to an inadvertent load release.
  • Built-in Onboard Weighing System — Includes an integrated Onboard Weighing System to reduce the risk of overload stress and aid pilots with loading decisions.
  • Fuel Drain Guard Kit — Provides a mechanical barrier that prevents the fuel drain lever from being accidentally activated by movement of the loaded swing suspension system.
  • TALON™ LC Hydraulic Hook — Greatly increases load security by using a hydraulically activated release mechanism instead of a traditional manual release cable
  • Low Maintenance Cost — Teflon-lined, self lubricating bushings at all wearing joints provide long life and greatly reduce maintenance requirements.

Our swing suspension kit is approved for new installation or as a replacement on the EC130 B4 aircraft.EC 130 Sling

Eliminates the common causes for inadvertent releases

Recently, Onboard Systems has pioneered and developed hydraulic technology to serve as the emergency release for a number of critical reasons. The United States Department of the Interior Aviation Management released a Technical Bulletin dated July 16, 2004 that outlined common safety issues involved in inadvertent cargo hook releases. Their major findings were:

  • Cables must be rigged to very exact specifications each time the hook is installed on the aircraft
  • Cables are prone to damage that can cause a load release

The Onboard hydraulic release mechanism consists of a small, self-contained hydraulic reservoir that is used to open the hook. It does not use any hydraulic power from the aircraft. The hydraulic release is activated with a cabin-mounted lever that incorporates a compact master cylinder. A slave cylinder integrated in the cargo hook interfaces with the release mechanism.

System Advantages

The hydraulic release offers significant advantages for installation, maintenance and operation:

  • Installation — Manual "push-pull" cable release systems need to be installed with very precise limits in order to make sure the system performs properly. A mistake one way could prevent the system from opening the hook; a mistake the other way could lead to the system accidentally opening. The nature of the cabled systems requires very large radius bends. The hydraulic system is not subject to any of the tight rigging requirements and can be installed with very tight bends, offering greater flexibility in routing the cable from the hook to the flight controls.
  • Maintenance — For similar reasons maintenance is simpler with a hydraulic system. A dry-break, quick-disconnect allows the hook system to be removed without any hydraulic fluid loss or need to bleed the complete system.
  • Operation — If a mechanical cable gets snagged or hit by the load it can inadvertently open the hook causing the loss of the cargo. The hydraulic system will only open the hook when the pilot activates the release handle — snagging or damage to the cable will not lead to accidentally dropping the cargo.

For more information, please visit our Eurocopter EC130 Cargo Hook product page.