A king air 200 pilot slid off the runway in snowy conditions.

Attributes
ACN	868207
Time
Date	201001
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Super King Air 200
Operating Under FAR Part	Part 91
Flight Phase	Landing
Flight Plan	IFR
Person 1
Function	Captain Single Pilot Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 98 Flight Crew Total 5706 Flight Crew Type 1105
Events
Anomaly	Ground Excursion Runway Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

I was flying the aircraft on a part 91 flight. Approximately 10 minutes prior to my approach; I was in communication with unicom. Unicom advised that visibility was somewhat affected by snowfall and that the runways had been plowed a short time ago and that there currently was snowfall. Unicom did not indicate that it was unsuitable to land. I checked the weather during the procedure turn inbound and it indicated that visibility was above minimums. There was a clear approach to the runway and the landing went smoothly. After about 5 seconds; the plane began sliding to the right due to compacted snow and powdered snow on the runway. I tried to correct with engine power and rudders but it didn't stop the sliding. Then I shut the engines off and the plane slid to the right into a snow bank. There were no injuries and no structural damage to the plane. There is damage to the propellers.

Original NASA ASRS Text

Title: A King Air 200 pilot slid off the runway in snowy conditions.

Narrative: I was flying the aircraft on a Part 91 flight. Approximately 10 minutes prior to my approach; I was in communication with UNICOM. UNICOM advised that visibility was somewhat affected by snowfall and that the runways had been plowed a short time ago and that there currently was snowfall. UNICOM did not indicate that it was unsuitable to land. I checked the weather during the procedure turn inbound and it indicated that visibility was above minimums. There was a clear approach to the runway and the landing went smoothly. After about 5 seconds; the plane began sliding to the right due to compacted snow and powdered snow on the runway. I tried to correct with engine power and rudders but it didn't stop the sliding. Then I shut the engines off and the plane slid to the right into a snow bank. There were no injuries and no structural damage to the plane. There is damage to the propellers.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.