What was found
FA REPORTS ON TAKEOFF AIRCRAFT HAS A SMOKE SMELL, FOLLOWED BY VERY LIGHT GREY SMOKE SETTLING AT FLOOR LEVEL IN FIRST CLASS, FOLLOWED BY A SOLVENT SMELL THAT REMAINED FOR THE DURATION OF THE 20 MINUTE FLIGHT. (FLIGHT 4504 - FILED OPEN) PLEASE REFERENCE AML 1110201 RUNNING AIRCRAFT, ON APU BLEED, PACKS AND AIRCRAFT WERE NORMAL NO SMELLS/SMOKE, BUT WHEN SWAPPING TO ENGINE BLEED, A SLIGHT OIL SMELL OCCURRED AND CLEARED AFTER 5-10 MINUTES OF RUNNING, NO SMOKE OR SOLVENT SMELLS NOTED DURING THE ENGINE RUNS, PER CRJ900 AMM 71-00-00