What was found
F/A SMELLED BURNING PLASTIC SMELL ON TAXIOUT. RETURNED TO GATE. ACCMP'D AN INSPECTION CHECK AS PER AMM(S). NO SMOKE NEITHER FUMES WERE OBSERVED. NO OBJECTS BURNED FOUND. FLIGHT CREW FILLED FORM 46-6020 OUT (SMOKE-ODOR IN THE PLANE QUESTIONNAIRE). DUE TO BURNING SMELL REPORT FROM FLT CREW PLZ ACCESS UPPER CEILING ARE AROUND SEAT ROW 20-30 AND INSPECT FOR POTENTIAL DAMAGE, ETC WHICH COULD BE CORRELATED TO SMELL. ALSO RUN ENGS AND RUN PACKS TO DETERMINE IF ANY POTENTIAL PACK ISSUES. REMOVED ALL CEILING PANELS INSPECTED ALL DEU'S, BALLAST & WIRING IN GENERAL, ALL FOUND OK NO EVIDENCE OF DAMAGE. RUNUP ENG PER JRH2-40-1 AND OPERATED SINGLE & DOUBLE PACK, OPS ALL NORMAL.