What was found
DURING TRANSIT CHECK WAS DETECTED SMOKE AND OIL ODOR IN THE CABIN; ADDITIONALLY, THE SMOKE ALARM OF THE AFT LT LAVATORY WAS ACTIVATED. AIRCRAFT WAS VENTILATED AND SMOKE ALARM WAS DEACTIVATED, AIR CONDITIONING SYSTEM WAS CHECKED, BEING CORRECT. APU WAS DETECTED LEAKING, SO APU AND WATER SEPARATORS WERE REPLACED IAW MM 49-10-00 AND 21-20-02, TEST CORRECT IAW MM 21-00-00 PAGE 501, ALL CORRECT.