What was found
AIRCRAFT WAS GROUNDED: MUST, DIRTY, OILY SMELL AFTER APPLICATION OF THRUST DURING TAKEOFF IN PHL. SMELL PERSISTED THROUGHOUT THE FLIGHT. WE DEPARTED PHL IN HEAVY RAIN. **SUPPLEMENTAL REPORT FOR AALA202401026117: MAINTENANCE FOUND THE RIGHT HAND MAIN LANDING GEAR DOOR ACTUATOR SWIVEL JOINT FITTING LEAKING HYDRAULIC FLUID WHICH WAS INGESTED INTO THE APU INLET. MAINTENANCE REPLACED THE SWIVEL JOINT FITTING AND ACCOMPLISHED THE DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED. ** (CLOSED)