While the FAA's highly touted ASIAS data mining program might have merit in routing out maintenance issues that largely remain below radar, nothing beats the a pair of human eyes for uncovering a problem, especially when those eye belong to an NTSB inspector.
From FlightGlobal on 30 January -
NTSB: Inadequate Bombardier action on persistent CRJ door problems
A review of pilot reports since 1995 in the Canadian service difficulty system, provided to US investigators by Bombardier, has revealed 823 incidents in which the main cabin door of a CL65-series regional jet (CRJ100 through CRJ900) has jammed or was difficult to open..."
"....Though a mechanic ultimately opened the door after entering the aircraft through the galley service door, an NTSB investigator who happened to be aboard the flight launched an investigation of the issue."