What was found
AT FL190, RECEIVED PAX DOOR RED WARNING MSG, ACCOMPANIED BY INCREASED NOISE FROM MAIN PAX DOOR. COMPLIED WITH QRH, PRESS NORMAL, WITNESS MARKS ARE ALIGNED BUT LOCK INDICATOR SHOWS UNSAFE. TROUBLE SHOT DOOR IAW AMM 52-11-00. ADJUSTED LOCK INDICATOR, LUBED LATCHES, CHECKED FOR CODES, NOTE NOTED. PERFORMED BITE TEST, NO DEFECTS NOTED AT THIS TIME. INSPECTED DOOR TO FUSELAGE HARNESS, NO DEFECTS NOTED.