Runway excursion by a C650 on the snow covered surface of runway 35R at den, co.

Attributes
ACN	606525
Time
Date	200401
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : den.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Flight Conditions	IMC
Weather Elements	Snow Ice
Light	Night
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Citation III, VI, VII
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : atp pilot : multi engine
Experience	flight time last 90 days : 90 flight time total : 17000 flight time type : 2000
ASRS Report	606525
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical excursion : runway inflight encounter : weather other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable other
Consequence	faa : investigated other other Other
Supplementary
Problem Areas	Weather Aircraft Flight Crew Human Performance Environmental Factor Airport Company
Primary Problem	Ambiguous

Narrative:

Duty day started at jfk at XA00 denver time, with passenger pick up. Refueled at oma and landed apa 8 hours 30 mins later to refuel and drop off passenger and pick up new sic -- departed apa to las and took a 20 min nap. Apa WX 3000-4000 ft broken with virga. Departed las without an update of apa WX. During arrival, ATIS reported 200 ft overcast 1/4 mi snow and mist. One aircraft ahead of us missed on the ILS runway 35R approach. Next it landed but said snow conditions were poor. Snow plow crew wanted the tower to close the runway because of snow buildup. Tower wanted to keep runway open until myself and another aircraft had landed. I should have heeded snow plow driver's concern. We broke out at 300 ft and 1 mi visibility and it looked lousy due to snow on runway but I continued to land. As the aircraft was coming to a stop it veered or slid off the edge of runway. I could not stop it with full left rudder and left reverse thrust. I'm not sure if the nosewheel steering had been engaged by PNF or not. No injuries nor damage to passenger or aircraft. FBO's tug pulled us back onto runway and into the hangar. FAA called me for information but I had been requested by my director of operations not to return the FAA's call, but that my director of operations would take care of their interest. Next time, I'll ensure nosewheel is armed on all lndgs and listen to the snow plow drivers!

Original NASA ASRS Text

Title: RWY EXCURSION BY A C650 ON THE SNOW COVERED SURFACE OF RWY 35R AT DEN, CO.

Narrative: DUTY DAY STARTED AT JFK AT XA00 DENVER TIME, WITH PAX PICK UP. REFUELED AT OMA AND LANDED APA 8 HRS 30 MINS LATER TO REFUEL AND DROP OFF PAX AND PICK UP NEW SIC -- DEPARTED APA TO LAS AND TOOK A 20 MIN NAP. APA WX 3000-4000 FT BROKEN WITH VIRGA. DEPARTED LAS WITHOUT AN UPDATE OF APA WX. DURING ARR, ATIS RPTED 200 FT OVCST 1/4 MI SNOW AND MIST. ONE ACFT AHEAD OF US MISSED ON THE ILS RWY 35R APCH. NEXT IT LANDED BUT SAID SNOW CONDITIONS WERE POOR. SNOW PLOW CREW WANTED THE TWR TO CLOSE THE RWY BECAUSE OF SNOW BUILDUP. TWR WANTED TO KEEP RWY OPEN UNTIL MYSELF AND ANOTHER ACFT HAD LANDED. I SHOULD HAVE HEEDED SNOW PLOW DRIVER'S CONCERN. WE BROKE OUT AT 300 FT AND 1 MI VISIBILITY AND IT LOOKED LOUSY DUE TO SNOW ON RWY BUT I CONTINUED TO LAND. AS THE ACFT WAS COMING TO A STOP IT VEERED OR SLID OFF THE EDGE OF RWY. I COULD NOT STOP IT WITH FULL L RUDDER AND L REVERSE THRUST. I'M NOT SURE IF THE NOSEWHEEL STEERING HAD BEEN ENGAGED BY PNF OR NOT. NO INJURIES NOR DAMAGE TO PAX OR ACFT. FBO'S TUG PULLED US BACK ONTO RWY AND INTO THE HANGAR. FAA CALLED ME FOR INFO BUT I HAD BEEN REQUESTED BY MY DIRECTOR OF OPS NOT TO RETURN THE FAA'S CALL, BUT THAT MY DIRECTOR OF OPS WOULD TAKE CARE OF THEIR INTEREST. NEXT TIME, I'LL ENSURE NOSEWHEEL IS ARMED ON ALL LNDGS AND LISTEN TO THE SNOW PLOW DRIVERS!

Data retrieved from NASA's ASRS site as of July 2007 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.