What was found
ON SHORT FINAL, PACK 1 DUCT TEMP WENT TO 44 C IN AUTO MODE WITH FULL COLD SET. NOTICED SULFUR TYPE SMELL IN COCKPIT. WENT TO MANUAL MODE DUCT TEMP SHOT UP TO 87 C, WITH FULL COLD SELECTED. DEFERRED LT PACK IAW MEL 21-51-1B. INSTALLED PLACARD, MM02 UPDATED & MXC 4632 NOTIFIED. R & R LT ACM IAW JC 900-21-310-902. OPERATIONS CHECKED & LEAK CHECK GOOD. DM 3198372-1 CLEARED. PLACARD REMOVED & MOC NOTIFIED 95770.