What was found
APPROXIMATELY 15 MINUTES FROM LANDING WE SMELLED A FAINT RUBBER BURNING ODOR. WHEN TRANSFERRING BLEEDS FROM ENGINES TO APU A FEW MINUTES LATER, PACK 1 HAD GOOD PSI 30, BUT COCKPIT TEMP STARTED TO RISE. TURNING PACK 1 OFF STOPPED TEMP RISE. DEFER IAW MEL 21-61-01 CAT C IAW MOC 4488 MM02, UPDATED PLACARD, INSTALLED COMPRESSOR DISCHARGE OVERTEMP SENSOR DAMAGED, SECURED CONNECTOR PLUG. R & R LT ACM, OVERTEMP SWITCH IAW AMM 21-51-10 AND AMM 21-51-34. UPON REPLACEMENT FOUND MASKING PAPER CLOGGING ACM. COCKPIT TEMP WILL ONLY CYCLE DOWN TO 38C MANUALLY OR IN AUTO AFTER REPAIR. NO FIX DI 3245260-1, REMAINS OPEN. AML 3245263-2 FOR FURTHER REPAIR. INSPECTED RAM AIR DUCTING FOUND DEBRIS ON LT HEAT EXCHANGER CLEANED AS REQUIRED. PERFORMED OPS CHECK OF AIR CONDITIONING SYS ALL IAW AMM 21-51-10. ALL CHECKS GOOD. THIS CLEARS DI 3245260-1, PLACARDS REMOVED, MMO2 UPDATED.