As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE IN CRUISE AT FL390 CREW HAD COMPRESSOR STALL WITH NR 1 ENGINE. CREW CARRIED OUT THE CHECKLIST AND DESCENDED TO FL350. F/A CALLED COCKPIT TO ADVISE THEY COULD HEAR THE ENGINE STALL. CREW REPORTED TO MAINTENANCE MINOR N1/EGT FLUCTUATIONS NO ENGINE PARAMETERS EXCEEDED. ACFT REMOVED FROM THE LINE FOR ENGINE INSPECTION. NIL PASSENGER REACTION.