What was found
UNRELIABLE AIRSPEED INDICATION ON LT, CA SIDE. ASSOCIATED MESSAGES INCLUDED CAUTION MESSAGES: MACH TRIM & EFIS COMP MON, STATUS MESSAGES: RUD LIMIT FAULT, STAB FAULT, RT & LT FADEC FAULT 2. ON POST WALK AROUND, DEBRIS FOUND IN CA SIDE PITOT TUBE. (FLIGHT 5541) PERFORMED UNRELIABLE AIR DATA INDICATION INSP IAW AMM 05-51-34 & FOUND A MELTED PIECE OF PLASTIC BLOCKING LT PITOT STATIC PROBE, R & R LT PITOT STATIC PROBE HEAD & PERFORMED LEAK TESTED, & OPS CHECK IAW AMM 34-11-01. OPS CHKD GOOD, ALL CORRELATED MESSAGES DID NOT RETURN. NO FURTHER DEFECTS NOTED AT THIS TIME.AIR DATA INFORMATION NOW MATCHES THE PITOT STATIC TEST EQUIPMENT ON BOTH CA & FO SIDES. ACFT REMAINS RVSM STATUS ACFT REMAINS DOWNGRADED FROM CAT II STATUS DUE TO FO RAD ALT DEFERRAL.