What was found
FLIGHT 3773, CREW REPORTED THAT ON ABOUT THE 3 MILE FINAL APPROACH, COCKPIT CREW SMELLED VERY LIGHT SMOKE WHICH SEEMED TO POSSIBLY BE FROM OUTSIDE. IMMEDIATELY AFTER, FLIGHT ATTENDANTS CALLED AND REPORTED SMOKE IN THE CABIN, NOT HEAVY BUT MORE THAN A TRACE. DECLARED AN EMERGENCY AND LANDED ONE MINUTE LATER. AIRCRAFT REMOVED FROM SERVICE. FOUND THE RIGHT HAND ACM SEZED. REMOVED AND REPLACED NR 2 ACM IAW AMM 21-51-08. OPS & LEAK CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.