Super King Air 300
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 50; Flight Crew Total 14000; Flight Crew Type 850
Situational Awareness
Ground Event / Encounter Object; Ground Event / Encounter Loss Of Aircraft Control; Ground Excursion Runway
Flight Crew Regained Aircraft Control
Airport; Weather; Human Factors
Upon landing; aircraft hydroplaned as was evident by the photographs that were taken the following morning. There were rain showers in the area; and the runway appeared wet on landing. The left main and nose landing gear slid off the side of the runway and became stuck in the mud. After touchdown; the aircraft felt like it was on ice; and started drifting left. With the power levers at idle; I applied right rudder to try to realign the aircraft on the centerline of the runway.In conclusion; had the runway been grooved this incident would not have occurred. There was minor damage to the aircraft from hitting a runway edge light.
Super King Air pilot reported hydroplaning on landing and hitting a runway light.