Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain Raytheon Aircraft Company (Raytheon), Model 390, Premier 1 airplanes. For certain airplanes, this proposed AD would require 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 proposed AD would limit future installations of the cover for the air conditioner and the air conditioning compressor motor module. This proposed 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 proposed AD to prevent the melting or burning of the plastic cover. The burning ofthe plastic cover could result in a fire.