What was found
HOT PLASTIC ODOR BY DOOR 3L ON TO..NO SMELL DETECTED IN FLIGHT IMAGES ADDED. DEBRIEFED FLIGHT CREW, CABIN CREW STATED SAME BURN PLASTIC SMELL HAPPEN ON THIS ACFT 2 DAYS PRIOR INTO (FCO ROME) INSPECTED AREA AT 3L AND 3R, OPS PACKS NO ODOR OR SMOKE NOTED, INSPECTED CEING HATCH INBETWEEN LAVS AT 3L AND 3R NO ODOR, OR SMOKE NOTED. AFT LAV AT 3L AND 3R HAD THE MIRROR LIGHT. PER TOMC REQUEST TO INSPECT DOOR HEATERS 3L AND 3R, AND BRING AIRCRAFT TO BLOCKS FOR TAKE OFF POWER TO REPLICATE CONDITIONS. PERFORMED CONDITIONAL INSPECTION OF DOOR HEATER 3L IN REF AMM 05-51-58. NO VISUAL EVIDENCE OF BURNT WIRES OR BURNT SMELL. PERFORMED DOOR AREA HEATER INSTALLATION TEST REF AMM 21-45-03. TEST PASSED. ADD EMP:U434543, PERFORMED CONDITIONAL INSPECTION AMM REF 05-51-58 UP TO STEP C (2) (H). ADD EMP:U434543, CONTINUED WITH AMM 05-51-58-800-801-C3 FROM AND INCLUDING STEP 2(C)(I) TO STEP 2(C)(T), BOTH ENGINES WERE RAN TO PART POWER AS PER AMM, NO SIGNS/EVIDENCE OF ODORS WITH APU OR ENGINE BLEEDS FOUND AT THIS TIME. AS PER TOM C REQUEST REMOVED AND REPLACED ALL UPPER RECIRC FILTERS IAW AMM 21-25-02 AND ALL LOWER RECIRC FILTERS IAW AMM 21-25-08. NO ODORS NOTED. CONDITIONAL INSPECTION COMPLETED IAW AMM 05-51-58 NO DEFECTS NOTED. A/C OK TO CONTINUE.