What was found
SMOKE IN COCKPIT DURING DESCENT. NO ABNORMAL INDICATIONS AND FLIGHT ATTENDANT DID NOT SMELL THE SMOKE. CHECKED RT & LT ENG FOR OBVIOUS DAMAGE, NO FAULT FOUND. CHECKED BOTH RT & LT ACM OILS, FOUND FULL. CHECKED FOR POPPED C/B, NONE FOUND. RAN RT ENG FOR APPROX 20 MIN WITH BLEED AIR ON, ACM RUNNING WAS A SLIGHT SMOKE/WARM AIR SMELL. RESIDUAL FROM DISCREPANCY NR 8 LOG PAGE 168096. (ENG CHANGE) RAN LT ENG, NO FAULTS NOTED. RETURNED AIRCRAFT TO SERVICE.