Airworthiness Directives; Raytheon Aircraft Company, Model 390, Premier 1 Airplanes

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The FAA adopts a new airworthiness directive (AD) for certain Raytheon Aircraft Company (Raytheon), Model 390, Premier 1 airplanes. For certain airplanes, this AD requires you (unless already done) to replace the plastic cover over the air conditioning motor module with a metallic cover and modify the air conditioning compressor motor module electromagnetic interference-radio frequency interference (EMI-RFI) filter located under the cover and reidentify the module part number. For all airplanes, the AD limits future installations of the cover for the air conditioner and the air conditioning compressor motor module. This AD results from reports that the plastic cover over the air conditioning motor module was found melted or burned and that the overheating of the EMI-RFI filter assembly located under the cover caused this damage. We are issuing this AD to prevent the melting or burning of the plastic cover. The burning of the plastic cover could result in a fire.