Shop Talk: Load Cell TBOs & Other Maintenance

Thursday, June 22, 2017

Load Cells
From left to right: Pin Load Cell, latest generation Link Load Cell, older style Link Load Cell

Onboard Weighing Systems provide operators with vital information about the weight they are carrying. Proper maintenance, including regular inspection and overhauls, is critical to ensure ongoing accuracy. All load cells have a specific time between overhauls (TBO), which is documented in your user manual. As a general rule, you can anticipate the same overhaul TBO schedule for your Onboard Systems cargo hook and its associated load cell.

It is important to note that load cells are not field serviceable and must be returned to the factory for overhaul service. There are no authorized service centers that can perform these overhauls. Our standard load cell overhaul service includes all recommended procedures listed in the owner's manual, including:

Discounted Load Cell Upgrades

As with all of our products, we are continuously improving our load cell assembly designs to take advantage of new technologies and safety enhancements. Some of the most recent load cell enhancements include:

When it’s time to send your older-style load cell in for overhaul, ask about our Load Cell Upgrade Program so you can take advantage of these improvements at a discounted price.

Load Cell Troubleshooting Guide

Finally, if you are experiencing problems with your Onboard Weighing System, we have an Electronic Load Weigh System Troubleshooting Guide available for download. This guide outlines field troubleshooting procedures for experienced aircraft mechanics using standard shop practices and basic troubleshooting skills. Initial troubleshooting is best done with the load weigh system installed in the helicopter. Standard shop tools and a quality volt-ohm meter are required.

As a general rule, difficulties with new system installations are usually associated with incorrectly setting up the cockpit indicator. Difficulties with the installation of new components (i.e. replacement load cell or cockpit indicator) are also due to cockpit indicator setup issues. Difficulties with existing installations are usually associated with cables that have been stretched, pinched, or cut and connectors that are damaged or corroded.


Tags: tbo schedules, vol14-iss2, shop talk, load cells