As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ODOR FROM LEFT PACK IN COCKPIT AND FORWARD CABIN ON GROUND AND IN FLIGHT. SMELLS LIKE OVERHEATING. *S/D* AFTER SHUTTING DOWN THE APU AND RUNNING THE LEFT-HAND PACK WITH ENGINE BLEED AIR, ODOR DISSIPATED AFTER 15 TO 20 MINUTES. FOUND METAL ON APU CHIP DETECTOR. APU WAS REPLACED, OPS CHECK WAS GOOD.