As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON T/O, CABIN AND GALLEY BURNING ODOR DECREASED BY FL 180, RETURNED ON DESCEND FR 10-6K FT. NEW HEAT EXCHANGERS INSTALLED PRIOR TO FLIGHT- SUSPECT SLIGHT ODOR FROM NEW EQUIPMENT (NORMAL). RAN PACKS AT FULL HOT FOR 15 MINUTES AND COULD ONLY DETECT SLIGHT ODOR SUSPECT BURNOFF OF NEW HEAT EXCHANGERS INSTALLED JUST PRIOR TO FLIGHT. CKD E/E COMPARTMENTS, NO DEFECTS OR BURNING NOTED.