What was found
DFW - FLT 311 - DURING CLIMB-OUT AUS, FLIGHT CREW NOTICED ACRID SMELL IN CABIN WITH SOME SMOKE AND HAZE. FLIGHT CONTINUED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED AUXILIARY POWER UNIT AND AS A PRECAUTIONARY, REPLACED BOTH COALESCER GAGS. OPERATIONS CHECK NORMAL WITH NO LEAKS NOTED. PACK BURN OUT ACCOMPLISHED WITH NO ODOR NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)