What was found
AFTER T/O, SMOKE APPEARED IN CABIN. SMOKE DETECTORS LT AND RT WENT OFF. ACCOMPLISHED CHECKLIST AND SMOKE DISAPPEARED WITH REDUCED POWER. COULD NOT ISOLATE PROBLEM PACK AND SMOKE REAPPEARED ON FINAL. PERFORMED SMOKE BURNOUT, REPLACED BOTH PACK COALESCER BAGS, RAN BOTH ENGINES TO T/O POWER WITH PACKS AND NO SMOKE WAS NOTED.