What was found
AIRCRAFT FILLED WITH SMOKE AS REVERSER STOWED AND UPON EXITING RUNWAY. NO BURNING SMELL OBSERVED AND SMOKE DISPLAYED UPON SHUTDOWN. INSPECTED ENGINES. FOUND EXCESSIVE DIRT RESIDUE ON BLOCKER DOORS AND IN INLET. RUNWAYS AND TAXIWAY HAVE HEAVY SAND RESIDUE AND SUSPECT TO BE CAUSE OF EVENT. NO ENGINE DAMAGE PRESENT. PERFORMED LEVEL A DECONTAMINATION PER A320 AMM 21-00-00-615-802. RECIRC FILTERS AND AVIONICS FILTERS PER A320 AMM 21-26. RAN ENGINES APU MULTIPLE HOURS. NO FURTHER DEFECTS OBSERVED. MCC NOTIFIED. NO FURTHER MAINT REQUIRED. OK FOR SERVICE.