What was found
LEFT PACK TRIPPED OFF AT GATE, FLIGHT DECK TEMP CONTROL INOPERATIVE IN AUTO AND MANUAL MODES. MEL 2101A LT PACK INOPERATIVE. PERFORMED FIM 21-52 TASK 828. FOUND NO AIRFLOW AT THE EXHAUST DUCT OUTLET OF THE LT RAM AIR SYS. FOUND THE ACM NOT SPINNING & A BLADE MISSING. REMOVED AND REPLACED THE LT ACM IAW AMM 21-51-04-401 UP TO AND INCLUDING STEP G(3)H, AND FROM G(3)M TO G(5)E, INLET FLANGE WAS FOUND DAMAGED. INSTALLED A NEW INLET FLANGE & CONTINUED WITH INSTALLATION OF LT ACM FROM STEP G(5)E TO COMPLETION IAW AMM 21-51-04. OPS & LEAK CHECKED GOOD. OK TO CONTINUE.