As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAW CREW: ODOR COMING FROM AFT GALLEY AREA. FOUND NR 2 PACK PUTTING OUT A RANCID ALMOST ELECTRICAL BURNING SMELL. INOPED PACK NR 2 IAW THE MEL. REPLACED AFT TRIM AIR VALVE, RT RECIRCULATION FILTER AND RT OZONE FILTER IAW MM. OPS NORMAL, LEAK CHECKS GOOD. PACK BURN-OUT ACCOMPLISHED.