Airworthiness directives › 2020-03-50
AD 2020-03-50 Airworthiness Directives; Cirrus Design Corporation Airplanes
Makes named: cirrus. Models named: SF50. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Cirrus Design Corporation (Cirrus) Model SF50 airplanes, serial numbers 0005 through 0176 and 0178, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Before further flight, disconnect and remove the headset amplifier and microphone interface circuit card assemblies by following the Accomplishment Instructions, steps A. and G. through K., of Cirrus Alert Service Bulletin Number SBA5X-23-03, dated February 7, 2020.
Unsafe condition
This AD was prompted by a cabin fire incident that occurred on a Cirrus Model SF50 airplane during ground operations. The investigation into the incident determined the probable root cause was a malfunction of the headset amplifier (part number (P/N) 38849-001) and the microphone interface (P/N 35809-001) circuit card assemblies for the 3.5 millimeter (mm) audio and microphone jacks. The FAA is issuing this AD to prevent an electrical short and subsequent uncontained cabin fire, which could result in occupant injury or loss of airplane control.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1