What was found
DURING T/S OF RH DUCT SURGE FOUND LEFT PACK TEMPERATURE CONTROLLER FAULTY(<P>TRANSFERRED TO MDDR 154731 IAW MEL 21-51-01-01, CAT C.</P> / <P>PER MCC REQUEST, SWAPPED LH PACK TEMPERATURE CONTROLLER P/N 1151864-1 S/N 1170-0354 WITH RH PACK TEMPERATURE CONTROLLER P/N 625946-10 S/N 060C-3515 IAW AMM 21-51-14. LEFT PACK OPERATES NML..</P> / <P>LP 784401 - ITEM 3: REMOVED AND REPLACED RIGHT HAND TEMP CONTROLLER (PN <SPAN>1151864-1, SN </SPAN><SPAN>1170-0354)</SPAN><SPAN> IAW AMM 767 21-51-14. OPS CHK GOOD.</SPAN></P> / <P>LP 784412 - ITEM 2 - ATL - REF LOG 784412 ITEM# 3 FOR PRSOV REPLACEMENT. REACTIVATED PACK AFTER VLV REPLACEMENT, OPS CHECK OK. THIS CLEARS MDDR 154731.</P>)