As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED A STRONG HOT METAL TYPE OF ODOR DURING TAKEOFF AND CRUISE. THE ODOR WOULD LAST A MINUTE OR TWO, THEN DISSIPATE. NO SMOKE WAS OBSERVED. THE AIRPLANE WAS REMOVED FROM SERVICE AND THE MAIN EQUIPMENT CENTER WAS INSPECTED. THERE WAS NO EVIDENCE OF BURNT COMPONENTS. THE COOLING PACK SYSTEM WAS RUN WITH NO ODORS OBSERVED. THE CAUSE OF THE ODOR WAS NOT FOUND.