AGUSTA AB139 and AW139 helicopters [Docket No. FAA-2011-1036; Directorate Identifier 2010-SW-088-AD; Amendment 39-16819; AD 2011-20-08] – Inspect certain modules and related connectors for corrosion. If corrosion is found on a module, replace the module with an airworthy module before further flight. If corrosion is found on a connector, clean it before further flight. Also, modify the No. 2 Modular Avionic Unit (MAU) ventilation duct, per the instructions of Agusta Technical Bulletin No. ...


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