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It has been discovered that there is a potential for corrosion at the base of the ACK E-04 ELT whip antenna on top of the engine cowling. In addition, there is corrosion potential of the BNC connector of the ELT antenna beneath the cowling. When operating in areas of moderate to heavy precipitation, moisture pools at the base of the whip antenna between the plastic and stainless-steel fittings as well as the BNC connector. This moisture allows an opportunity for corrosion to develop. If corrosion becomes severe, then the ELT whip antenna can potentially depart from its mount and strike the propeller, fuselage boom, or tail surfaces. Or severe corrosion can cause the ELT antenna to not properly emit radio signals. The following are inspection and repair guidance to contain the corrosion.

https://www.iconaircraft.com/wp-cont...-Corrosion.pdf

DATE ISSUED: 6/8/2023
DATE EFFECTIVE: 6/8/2023
S/N: 00001 – 00185
TIME OF COMPLIANCE: At the next Service Interval