As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS ON TAXI IN WITH SINGLE ENGINE RUNNING FLIGHT ATTENDANTS SAW HAZE THROUGHOUT THE CABIN WITH AN ODOR. FOUND APU LEAKING OIL FROM COOLING FAN AREA. PERFORMED DECONTAMINATION OF ECS WITH APU INOP. AFTER COOLING FAN AND TRANSFER TUBE REPLACEMENT, APU STILL LEAKING. PERFORMED ECS DECONTAMINATION AGAIN. NO CONTAMINATION NOTED. COMPLY WITH NO GO ODI PREVENTION. APU REPLACED.