What was found
DURING SHORT FINAL F/A AND CREW NOTICED A BURNING ODOR COMING THROUGH THE ECS SYS, NO SMOKE OR HEAT DETECTED BY F/A OR CREW. ENGINE AIR WAS SOURCE FOR BLEED AIR. DEFERRED RT IAW MEL 21-51-1-1, C RAM AIR SOV VERIFIED OPERATIVE MX NOTIFIED 8483 ENTERED INTO MMO2. WHILE TROUBLESHOOTING FOUND RT PACK OIL APPEARS BLACK OR BURNED. SUSPECT RT ACM BAD. ITEM REMAINS DEFERRED MX NOTIFIED. R & R RT AIR CYCLE MACHINE IAW AMM 21-51-10. REMOVED FROM MEL 21-51-1-1C.