What was found
FLIGHT DECK DOOR DIFFICULT TO OPEN FROM THE INSIDE THE FLIGHT DECK. REMOVED FROM SERVICE, FOUND DOOR TO OPEN/CLOSE PROPERLY. COULD NOT DUPLICATE. DURING OP'S CHECK FOUND AUTOMATIC LOCKING SYSTEM INOPERABLE, PLACED THAT ON MEL. REF E175 AMM 52-51-03 PARA 10 FOR OP'S TEST PERFORMED, RETURNED TO SERVICE.