What was found
STRANGE ODOR ON PLANE WHEN ON PC AIR AT GATE.OR APU AIR. BURNING CHEMICAL SMELL. CABIN ODOR REPORTING SHEET NOT FILLED OUT. RAN APU AND BOTH PACKS WITH NO ODOR. PERFORMED TSM TASK 05-50-00-810-831-A. NO SMELL OF OIL, HYDRAULIC FLUID, DE-ICING FLUID, ELECTRICAL OR CHEMICAL PRESENT. NO HISTORY WITHIN THE LAST 90 DAYS. MAINTENANCE ACCOMPLISHED OUTSIDE AT HANGAR LOCATION.