As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GROUND, OAT 90F, DETECTED THE ODOR OF SOMETHING BURNING, FOLLOWED BY VISIBLE SMOKE IN COCKPIT. OBSERVED COCKPIT SOURCE TEMP TO BE CLIMBING RAPIDLY THROUGH 150. ISOLATED COCKPIT PACK AND SMOKE AND ODOR DECREASED BUT STILL PRESENT. R & R COCKPIT PAC AIR CYCLE MACHINE ASSY IAW MODEL CMM 21-50-00. OPS AND LEAK CHECK GOOD. ALSO REPLACED ACM FAN HSG (ASPIRATOR) AND SLEEVE SEALS. IAW CMM 21-50-02. OPS AND LEAK CHECK GOOD.