What was found
AT TAKEOFF POWER COCKPIT FILLS WITH STRONG BURNING ODOR. SUSPECT LEFT PACK OR ENGINE NR 1 BLEED SYSTEM IS CONTRIBUTING TO PROBLEM. WHEN LEFT PACK IS TURNED OFF IN FLIGHT ODOR IS REDUCED. DO NOT APPEAR TO GET ODOR EXCEPT IN HIGH ENGINE POWER SITUATION. RAN LEFT PACK FOR OVER 30 MINUTES NO BURNING SMELL NOTED. SUSPECT LEFTOVER RESIDUE FROM BAD CONDENSER REFERENCE PREVIOUS WRITE-UP.