What was found
RIGHT ACM EICAS STATUS RT PACK AIR CYCLE MACHINE (ACM) FAILED. STRONG BURNING ELECTRIC ODOR IN CABIN. LOUD GRINDING NOISE BELOW FLT DC ITEM NEEDS TO BE PLACED ON MEL DUE TO RT ACM FAIL, DDP CW. WHILE AIR CONDITIONING WAS WORKING, NO BAD OR BURN ODOR NOTED, ALSO AIR CONDITIONING ELECTRICAL CONNECTIONS VERIFIED IAW AMM 20-60-04-100-801, ALL OK, NO EVIDENCE OF DAMAGE OR BURNED EQUIPMENT CONFIRMED ACM HAS FAILED ON RT PACK WITH PACKS IN OPS IAW AMM TASK 21-00-00-800-803. INTERROGATED EXISTING FAULTS. MEL PROCEDURES FOLLOWED AND RT PACK BACK IN DEFFERED STATE REF IPC 21-52-00-01 ITEM 609. R & R RT ACM . ALL LEAK AND OPS CHECKS PASS ,