As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED WEIRD SMELL THROUGHOUT THE CABIN. MAINTENANCE FOUND THE APU LEAKING OIL FROM THE APU OIL COOLING FAN AND THE APU OIL COOLER. MAINTENANCE REPLACED THE THE APU OIL COOLER PER AMM 49-91-44 (AALA202407221663) AND THE APU OIL COOLING FAN PER AMM 49-52-51. (AALA202407226528). A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.