What was found
ON TAXI, SMOKE LIGHT NR 5, 7, 9, & 10 ILLUMINATED ON FLIGHT ENGINEER PANEL, AND SMOKE AT MASTER WARNING PANEL CONTINUED CHIME. APPROPRIATE EMERGENCY CHECK LIST ACCOMPLISHED. REMOVED AND REPLACED NR 7 SMOKE DETECTOR UNIT AS PER M/M 26-11-00. ALSO REMOVED AND REPLACED BOTH ACM COALESCER BAGS AS A PRECAUTION M/M 21-51-16. CHECKED ON GROUND, OPS NORMAL.