What was found
ON FINAL 1500' AGL, MASTER CAUTION EQUIP BAY SMOKE INDICATION. DECLARED EMERGENCY RAN ECAM & LANDED. INDICATION WENT AWAY SHORTLY INTO PROCEDURE & NO SMOKE SEEN OR SMELLED. INSPECTED E/E BAY & NO EVIDENCE OF SMOKE OR FUMES. 12WA REPLACED. FOUND NO EVIDENCE OF MOISTURE FROM OVERHEAD IN E/E BAY. AFTER ENG RUN, NOTICED STRONG OIL ODOR IN CABIN & COCKPIT, CHANGED COALESCER SOCKS PER MM 21-51-16-3. RAN ENGINES PER JRH AGAIN & ODOR CLEARED. ODOR PRESENT AGAIN AFTER APU BLEED OPENED. CLOSED APU BLEED & CONTINUED ENG RUN TO CLEAR DUCTS. AVIONICS SMOKE DETECTOR REPLACED, RAN ENGS WITH PACKS ON FOR APPROX. 20 MIN. NO SMOKE ALERTS OR ODOR . OK FOR SERVICE.