LCSU 4 300 ml RTCA

The RTCA designation allows the LCSU 4 units to be battery operated in a commercial aircraft. The LCSU 4 should not interfere with the aircraft’s electronics or instrumentation while being operated. The appearance of both LCSU 4 units is essentially the same. However, the internal lining of the units is distinctly different. The new RTCA cases have been coated internally with a gold-coloured coating. This coating helps minimize “electronic noise” emissions per the RTCA/DO-160G - Section 21, Environmental Conditions and Test Procedures for Airborne Equipment – Emission of Radio Frequency standard.