Narrative:

While cruising at FL410; 43 minutes into the flight 80 nautical miles northeast of ZZZ; we encountered a limited loss of avionics equipment (amber cas message 'check DU1 (display unit)') followed by the complete loss (black screen) of DU1 and a strong odor of smoke with some visible smoke in the cockpit. We asked for immediate radar vectors to ZZZ; advised center and executed an ATC vectored descent. The light amounts of smoke completely cleared in a short time during the initial rapid descent. We landed at ZZZ without further incident or additional smell or visible signs of smoke.VMC conditions prevailed throughout. We cleared the runway without delay and stopped where we were met by the fire trucks. We taxied under fire truck escort to the FBO facility where a post flight and preliminary inspection of the forward equipment bay and cockpit was performed by the crew and fire chief which revealed no visible heat or fire damage to the aircraft. Cause of the equipment failure is yet to be determined.

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Original NASA ASRS Text

Title: CE750 flight crew reported the loss of Display Unit 1 and presence of electrical fumes at FL410. The crew elected to divert to the nearest suitable airport. The fumes dissipated completely during the descent.

Narrative: While cruising at FL410; 43 minutes into the flight 80 nautical miles northeast of ZZZ; we encountered a limited loss of avionics equipment (Amber CAS message 'Check DU1 (Display Unit)') followed by the complete loss (black screen) of DU1 and a strong odor of smoke with some visible smoke in the cockpit. We asked for immediate radar vectors to ZZZ; advised center and executed an ATC Vectored descent. The light amounts of smoke completely cleared in a short time during the initial rapid descent. We landed at ZZZ without further incident or additional smell or visible signs of smoke.VMC conditions prevailed throughout. We cleared the runway without delay and stopped where we were met by the fire trucks. We taxied under fire truck escort to the FBO facility where a post flight and preliminary inspection of the forward equipment bay and cockpit was performed by the crew and fire chief which revealed no visible heat or fire damage to the aircraft. Cause of the equipment failure is yet to be determined.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.