What was found
WHEN BLEEDS ARE SWITCHED FROM APU TO ENGINES AFTER TAKEOFF THERE IS AN ODOR FOR ABOUT 5-10 MINUTES FROM THE AIR VENTS PAX SAID IT WAS A SMOKY TYPE ODOR CAN BE SMELLED ON CABIN AND COCKPIT. RAN ENGINES BEFORE AND AFTER INSPECTIONS, APU START UP AND RUN WAS NORMAL, MAIN ENGINE STARTUP AND RUNS NORMAL, AND NO SMELL NOTED REGARDLESS OF BLEED SOURCE. REMOVED RAM AIR LOWER DUCT, CLEANED BUGS FROM ON THE PRE COOLER AND REINSTALLED EXISTING RAM AIR LOWER DUCT IAW AMM 21-53-17-400-801. SQK 58 BOROSCOPED APU COMPRESSOR INLET AND BREATHER TUBE ON APU AND REMOVED CICADA FOD FROM COMPRESSOR SCREEN AND INLET PLENUM. BREATHER TUBE WAS FREE OF CICADAS. NO DISCREPANCIES NOTED.