As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLIGHT 2371 THE CREW REPORTED SMOKE IN THE COCKPIT AND CABIN AFTER TAKEOFF. THE ACFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MX GROUND RAN THE ENGINES TO REMOVE RESIDUAL OIL FROM THE BLEED AIR SYSTEM FROM A PREVIOUS ENGINE CHANGE, OPS TESTED THE PAX SYSTEM WITH NO SMOKE NOTED. THE ACFT WAS APPROVED FOR RETURN TO SERVICE.