The Avionics Shelf installs in the truss area of the helicopter and provided extra space for installation of additional avionics. This shelf is required for installation of the Garmin Traffic Advisory System and Garmin Radar Altimeter. The Expanded Avionics Shelf provides a larger avionics shelf with a maximum shelf capacity of 100 lbs. Bell 505, Small avionics shelf developed for installing Garmin LRU’s such as Traffic Advisory System and Radar Altimeter System. Avionics Shelf is installed to mounting provisions on the aircraft truss. Max capacity of the shelf is 25 lbs.