What was found
AIRCRAFT WAS GROUNDED: WET DOG / MUSTY SMELL ON TAXI OUT AND ALSO ON DESCENT BELOW 10000 FEET. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. ** SUPPLEMENTAL REPORT FOR AALA202306018898: MAINTENNACE FOUND THE APU COMPARTMENT HAD RESIDUAL OIL AND CLEANED THE APU COMPARTMENT. A SATISFACTORY LEAK CHECK OF THE APU WAS ACCOMPLISHED AND NO LEAKS WERE NOTED. MAINTENANCE ACCOMPLISHED A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SSYTEM. A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS BEING NOTED. ** (CLOSED)