What was found
AIRCRAFT WAS GROUNDED: AT TOP OF DESCENT ODOR IN FLIGHT DECK (NOT) CABIN DETERMINED AS MODERATE CATEGORY A IN QRH TURNED PACK 1 OFF ODOR DISSIPATED. MAINTENANCE ISOLATED SOURCE OF ODOR TO THE APU. **ORIGINAL REPORT WAS AALA202208230819** MAINTENANCE FOUND LEAKS AT THE FOLLOWING AREAS ON THE APU: THE OIL COOLER TRANSFER TUBE LEAKING AT THE GEARBOX AND REPLACED THE O-RINGS. THE LUBE MODULE PLATE SEAL (AALA202209016871) AND THE LUBE MODULE (AALA202209019274) WERE LEAKING AND REPLACED PER AMM 49-91-45. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS BEING NOTED.