What was found
ALL SIX BAYONET FLAG WINDOWS ARE DIRTY. THE UPPER FOUR ARE FILLED WITH MOISTURE. FOR THE UPPER FOUR WINDOWS YOU CAN SEE THE FLAGS MOVE WHEN THE DOOR LOCKING HANDLE IS MOVED, BUT IT'S VERY DIFFICULT. THE LOWER TWO WINDOWS HAVE NO FLAG MOVEMENT WHATSOEVER. ALSO, WE HAD AN INTERMITTENT CABIN DOOR CAS MESSAGE. I RAN THE QRH PROCEDURE AND THE LIGHT WENT OUT. "CORRECTIVE ACTION" GAINED ACCESS TO AND CLEANED THE DOOR FLAG CLEAR COVERS AND PERFORMED SATISFACTORY OPS CHECKS REF CE680A AMM 52-10-50. REMOVED DAMAGED THRESHOLD HARNESS AND REPALCED WITH A NEW HARNESS REF CE680A AMM 52-10-00. PERFORMED SATISFACTORY OPS CHECKS REF CE680A AMM 52-70-00. PN OFF/ON 8469153-1 NSN