As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING WALK AROUND, FOUND OIL WEEPING FROM COLD AIR UNIT FAN OUTLET VENT ON SIDE OF AIRCRAFT. FURTHER INSPECTION FOUND OIL LEAKING ON FAN SIDE OF COLD AIR UNIT TURBINE. REFRIGERATION PACK REPLACED. ENVIROMENTAL CONTROL SYSTEM FUNCTION CHECK CARRIED OUT. AIRCRAFT RETURNED TO SERVICE.