What was found
MCO-ATL - FLT 116 - A/C RETURNED TO MCO ON CLIMB-OUT, AS PRECAUTION DUE TO BURNING ODOR IN CABIN, REPORTED BY PAX. A F/A REPORTED TO MX REP THAT A SMALL AMOUNT OF SMOKE WAS SEEN DURING LANDING. PRELIMINARY FINDINGS INDICATED LEFT GROUND POWER WIRE AT FLOOR LIGHT ASSEMBLY WAS SHORTED. SUBSEQUENTLY, INSPECTED AND EVALUATED DAMAGE TO FORWARD CARGO COMPARTMENT RELAY AND TRANSFORMER PANEL. AS A PRECAUTIONARY MEASURE, REPLACED VARIOUS RELAYS (R2-10, R2-11, R2-69, R1-134, R2-135, R2-136, R2-155, AND TRANSFORMERS (T1-39, T1-7, T1-8, T1-9, T1-10, IN ADDITION TO THE DAMAGED WIRE AND ASSOCIATED HARDWARE IAW DC9 MM. (M)