As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF, CREW NOTED SLIGHT SMOKE IN CABIN & SMELL OF BURNING OIL. RETURNED WITHOUT INCIDENT. THIS WAS FIRST FLIGHT AFTER OVERHAULED ENGS WERE INSTALLED. OPENED BLEED SYS & USED BORESCOPE TO INSPECTED ENG & BLEED SYS UP TO THE PRESS AFT PRESS BULKHEAD. NO INDICATION OF OIL IN THE BLEED SYS INCLUDING ENG CORE & ENG BLEED PORTS. PERFORMED ENG RUNS & OIL CONSUMPTION RUN IAW INSTRUCTIONS FROM MFG. DETERMINED CAUSE OF SMOKE & SMELL WERE FROM RESIDUAL OIL IN ENG CORE FROM OVERHAUL. ACFT WAS RETURNED TO SERVICE.