A Canadian-registered Embraer Legacy 450 twinjet flying from Lexington, Kentucky, to Calgary earlier this month experienced a cascading avionics failure that led the crew to declare "Pan-Pan" and make an expedited descent to their destination, according to a Transportation Safety Board of Canada preliminary report. The 2016-model aircraft (C-GASL) operated by fractional provider Air Sprint experienced AVNX LH DU FAULT and AP FAULT crew alerting system warnings approximately 75 minutes before landing at Calgary International Airport (YYC) on January 19.

"All navigation sources were lost on the captain's side along with multiple flags on the PFD and multiple failures associated with the multifunction keyboard pad," the prelim reads. "The #1 FMS failed, and the autothrottles disengaged...Control of the pressurization was lost."

The captain transferred control to the first officer, and the crew consulted the QRH. The aircraft entered a shallow descent and made a normal landing at YYC, with the crew referencing the first officer's instruments. The report noted "all systems resumed normal operation" following an avionics reboot by maintenance, and online flight tracking sources indicate the jet returned to service four days later. The Legacy 450 is equipped with the Collins Pro Line Fusion avionics suite.