As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, PILOT REPORTED SMOKE IN THE COCKPIT WITH THE LEFT BLEED AIR ON. TURNED OFF BLEED AIR AND RETURNED TO THE AIRPORT. NO EMERERGENCY DECLARED. MAINTENANCE HAD CONDUCTED A POWER RECOVERY WASH ON THE ENGINES PRIOR TO FLIGHT, IT WAS DISCOVERED THAT THERE WAS RESIDUAL SOAP IN THE COMPRESSOR WHICH THEN VAPORIZED & BURNED WHEN THE ENGINE WAS RUNNING, AND THE SMOKE CAME INTO THE COCKPIT WHEN THE BLEEDS WERE TURNED ON.