AD 2005-25-07 Airworthiness Directives; Raytheon Aircraft Company, Model 390, Premier 1 Airplanes

Makes named: raytheon. Read the applicability below — it usually turns on serial or part numbers too.

(c) This AD applies to the following airplane models and serial numbers that are certificated in any category: (1) Group 1: Raytheon Aircraft Company, Model 390, Premier 1 Airplanes, serial numbers RB-1, RB-4 through RB-101, RB-103 through RB-119, and RB-121, that have not replaced the plastic cover over the compressor motor module with a metallic one (part number (P/N) 390-555015-0001 or FAA-approved equivalent part number). (2) Group 2: Raytheon Aircraft Company, Model 390, Premier 1 Airplanes, serial numbers RB-1, RB-4 through RB-101, RB-103 through RB-119, and RB-121, that have installed the metallic cover (P/N 390-555015-0001 or FAA-approved equivalent part number). (3) Group 3: Raytheon Aircraft Company, Model 390, Premier 1 Airplanes, serial numbers RB-120 and RB-122 through RB-129.

(e) What actions must I do to address this problem for Group 1 airplanes? To address this problem for Group 1 airplanes, you must do the following:   Actions Compliance Procedures (1) Air Conditioning Motor Module Cover Replacement: Replace the plastic cover over the air conditioning motor module with a new or fabricated metallic cover. Use Raytheon part number (P/N) 390-555015-0001 or an FAA-approved equivalent part number Within 30 days after January 23, 2006 (the effective date of this AD), unless already done Follow Raytheon Aircraft Company Service Bulletin No. SB 21-3715, dated February 2005. (2) Air Conditioning Compressor Motor Module EMI-RFI Filter Modification: Modify the air conditioning motor module EMI-RFI filter and reidentify the module part number with a P/N 390-385026-0003 module Within 30 days after January 23, 2006 (the effective date of this AD), unless already done Follow Raytheon Aircraft Company Service Bulletin No. SB 21-3733, dated June 2005, and Enviro Systems, Inc. Service Bulletin No. SB05-101, Revision B, dated April 27, 2005. (3) Future Installations—Cover for Air Conditioner: You must only install a metal cover, P/N 390-555015-0001 or FAA-approved equivalent part number, over the air conditioning motor module. This is mandatory equipment As of January 23, 2006 (the effective date of this AD) Follow Raytheon Aircraft Company Service Bulletin No. SB 21-3715, dated February 2005. (4) Future Installations—Air Conditioning Compressor Motor Module: Do not install any compressor motor module, P/N 390-385026-0001 or FAA-approved equivalent part number As of January 23, 2006 (the effective date of this AD) Not Applicable. (f) What actions must I do to address this problem for Group 2 airplanes? To address this problem for Group 2 airplanes, you must do the following:   Actions Compliance Procedures (1) Air Conditioning Compressor Motor Module EMI-RFI Filter Modification: Modify the air conditioning motor module EMI-RFI filter and reidentify the module part number with a P/N 390-385026-0003 module Within 60 days after January 23, 2006 (the effective date of this AD), unless already done Follow Raytheon Aircraft Company Service Bulletin No. SB 21-3733, dated June 2005; and Enviro Systems Inc. Service Bulletin No. SB05-101, Revision B, dated April 27, 2005. (2) Future Installations—Cover for Air Conditioner: You must only install a metal cover, P/N 390-555015-0001 or FAA-approved equivalent part number, over the air conditioning motor module. This is mandatory equipment As of January 23, 2006 (the effective date of this AD) Follow Raytheon Aircraft Company Service Bulletin No. SB 21-3715, dated February 2005. (3) Future Installations—Air Conditioning Compressor Motor Module: Do not install any compressor motor module, P/N 390-385026-0001 or FAA-approved equivalent part As of January 23, 2006 (the effective date of this AD) Not Applicable. (g) What actions must I do to address this problem for Group 3 airplanes? To address this problem for Group 3 airplanes, you must do the following:   Actions Compliance Procedures (1) Air Conditioning Compressor Motor Module EMI-RFI Filter Modification: Modify the air conditioning motor module EMI-RFI filter and reidentify the module part number with a P/N 390-385026-0003 module Within 60 days after January 23, 2006 (the effective date of this AD), unless already done Follow Raytheon Aircraft Company Service Bulletin No. SB 21-3733, dated June 2005; and Enviro Systems Inc. Service Bulletin No. SB05-101, Revision B, dated April 27, 2005. (2) Future Installations—Cover for Air Conditioner: You must only install a metal cover, P/N 390-555015-0001 or FAA-approved equivalent part number, over the air conditioning motor module. This is mandatory equipment As of January 23, 2006, (the effective dae of this AD) Follow Raytheon Aircraft Company Service Bulletin No. SB 21-3715, dated February 2005. (3) Future Installations—Air Conditioning Compressor Motor Module: Do not install any compressor motor module, P/N 390-385026-0001 or FAA-approved equivalent part number As of January 23, 2006 (the effective date of this AD) Not Applicable.

(d) This AD is the result of reports that the plastic cover over the air conditioning motor module was found melted or burned and that the overheating of the electromagnetic interference-radio frequency interference (EMI-RFI) filter assembly located under the cover caused this damage. The actions specified in this AD are intended to prevent the melting or burning of the plastic cover. The burning of the plastic cover could result in a fire. Note: 14 CFR 21.303 allows for replacement parts through parts manufacturer approval (PMA). The phrase “or FAA-approved equivalent part number” in paragraphs (e), (f), and (g) of this AD is intended to signify those parts that are PMA parts approved through identicality to the design of the replacement parts to correct the unsafe condition. Equivalent replacement parts to correct the unsafe condition under PMA (other than identicality) may also be installed provided they meet current airworthiness standards, which include those actions cited in this AD.

(b) None.