Narrative:

Leveling off at FL310 we had flight display failure. This was followed by smoke in the cockpit and a left pack overtemp. Due to the smoke in the cockpit and 2 system malfunctions, we declared an emergency and diverted into ZZZ. Callback conversation with reporter revealed the following information: the reporter stated on leveloff at FL310 the captain's pfd went blank followed by light smoke. With the crew's attention focused on the failed instrumentation and smoke, the left pack tripped off with 'overtemp' indication. When the reporter was asked if the pack was operating in automatic mode, the reporter said 'no it was in manual, the automatic mode on this airplane never works and is always operated in manual.' on the ground, maintenance attempted to replace the pfd, but had none in stock so the removed unit was reinstalled and operated normally. The cause of the smoke was believed to have come from the left pack which was then deferred. The airplane was routed on a maintenance ferry to a maintenance facility. The reporter has no information on the maintenance action taken and the component that failed.

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Original NASA ASRS Text

Title: A CL65 ON LEVELOFF AT FL310 DECLARED AN EMER AND DIVERTED DUE TO L PFD WENT BLANK. SMOKE IN COCKPIT AND L PACK OVERTEMP TRIP.

Narrative: LEVELING OFF AT FL310 WE HAD FLT DISPLAY FAILURE. THIS WAS FOLLOWED BY SMOKE IN THE COCKPIT AND A L PACK OVERTEMP. DUE TO THE SMOKE IN THE COCKPIT AND 2 SYS MALFUNCTIONS, WE DECLARED AN EMER AND DIVERTED INTO ZZZ. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED ON LEVELOFF AT FL310 THE CAPT'S PFD WENT BLANK FOLLOWED BY LIGHT SMOKE. WITH THE CREW'S ATTN FOCUSED ON THE FAILED INSTRUMENTATION AND SMOKE, THE L PACK TRIPPED OFF WITH 'OVERTEMP' INDICATION. WHEN THE RPTR WAS ASKED IF THE PACK WAS OPERATING IN AUTO MODE, THE RPTR SAID 'NO IT WAS IN MANUAL, THE AUTO MODE ON THIS AIRPLANE NEVER WORKS AND IS ALWAYS OPERATED IN MANUAL.' ON THE GND, MAINT ATTEMPTED TO REPLACE THE PFD, BUT HAD NONE IN STOCK SO THE REMOVED UNIT WAS REINSTALLED AND OPERATED NORMALLY. THE CAUSE OF THE SMOKE WAS BELIEVED TO HAVE COME FROM THE L PACK WHICH WAS THEN DEFERRED. THE AIRPLANE WAS ROUTED ON A MAINT FERRY TO A MAINT FACILITY. THE RPTR HAS NO INFO ON THE MAINT ACTION TAKEN AND THE COMPONENT THAT FAILED.

Data retrieved from NASA's ASRS site as of July 2007 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.