As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 8139, AFTER TAKEOFF FROM SFO REAR FLIGHT ATTENDANTS REPORT BAD MOLDY FLOOR SMELL. ZERO EVIDENCE IN FLIGHT DECK. SOURCE UNDETERMINED MULTIPLE FLIGHT ATTENDANTS SMELLED IT CONCENTRATED IN BACK OF THE PLANE - NOTICED SMELL IN FLIGHT DECK AFTER BIG POWER CHANGE. CORRECTIVE ACTION: REPLACED LEFT ENGINE FAN SHAFT COVER PACK, REINSTALLED INLET CONE FRONT COVER. (LP 5506468)