As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. CABIN CREW REPORTED STRONG FUMES IN THE AFT PART OF THE CABIN ON FINAL APPROACH. NO EMERGENCY DECLARED. LANDING UNEVENTFUL. ACCOMPLISHED JOB CARD 26L00021001 FOR CABIN AIR QUALITY AND FOUND APU TO BE SOURCE. REPLACED APU OIL COOLING FAN PER AMM 49-52-51. LEAK AND OPERATIONAL CHECK GOOD.