What was found
BURNING ODOR IN COCKPIT LOCKED LT PACK TRIPPED, FLIGHT DECK WENT FULL HOT THEREFORE CAUSING A HEAT/HOT ODOR COMPLIED WITH FORM 46-6020 PERFORMED CONDITIONAL INSPECTION IAW AMM 05-51-58, SMELLED, IT WAS A HEATING ODOR DUE TO THE LT PACK TEMP RISING, TURNED OFF LT PACK, ODOR GOES AWAY WITH RT PACK RUNNING, ONCE LT PACK TURNS OFF, TEMP RISES, PERFORMED FIM 21-51, FAULT TREE 809, OPERATED LT PACK, VERIFIED IF AIR CAME OUT OF PACK EXHAUST, NO AIR COMES OUT, ON NORMAL OR STANDBY, TURNED PACK OFF TO PREVENT OVERHEAT, NEXT STEP WOULD BE SHEET 2, BLOCK 3 R & R LT PACK ACM IAW AMM 21-51-03-404-018 UP TO AND INLUDING STEP G ITEM 19 CONTINUE FROM STEP (H) UP TO COMPLETION. FOUND LT REHEATER CRACKED.