What was found
ON DEPARTURE CLIMB-OUT, NOTICED NON ELECTRICAL BURNING SMELL/ODOR, NR 1 BLEED AND LEFT PACK OPEN AND ON. SELECTED LEFT NR 2 BLEED, ODOR CONTINUED. SELECTED LEFT PACK AND LEFT NR 2 BLEED. ODOR/SMELL ABATED, SELECTED RIGHT NR 2 BLEED AND DESELECTED NR 3 BLEED. ODOR GONE. SUBMITTER STATES, SUSPECT LEFT PACK AS SOURCE OF ODOR. REMOVED AND REPLACED LEFT PACK CONDENSER PER MAINTENANCE MANUAL 21-55-51. GROUND CHECKED GOOD USING APU. AIRCRAFT OK FOR SERVICE.