What was found
MAIN DOOR: ON DEPARTURE, CLIMBING THROUGH FL200, MASTER WARNING, DOOR PAX OPEN ILLUMINATED FOR ABOUT 10 SECONDS. *** CORRECTIVE ACTION *** GAINED ACCESS TO PASSENGER DOOR MICROSWITCHES AND INSPECTED WITH NO DEFECTS NOTED. SPECTED VISIBLE PORTION OF WIRING IN AIRSTAIR WITH NO DEFECTS NOTED. OPERATED DOOR NUMERROUS TIMES WITH NO DEFECTS NOTED. DOOR INDICATION OPS CHECK GOOD. PER EMBRAER RECOMMENDATIONS COMPLIED WITH EMB FIM 52-71-00-810-801 WITH NO DEFECTS NOTED. AIRCRAFT RESTORED TO ORIGINAL CONFIGURATION. MCC REPORTS NO HISTORY WITH THIS DISCREPANCY. DOOR INDICATION OPS CHECK GOOD REF. EMB505 AMM 52-70-20, AIRCRAFT OK TO RETURN TO SERVICE