Aircraft Incident/Accident Report
Sheridan County Airport

Sheridan, Wyoming 82801
Saturday, November 20, 1999 21:00 MST

| More
NTSB Narrative Summary Released at Completion of Accident
The pilot said that this was the first flight after the annual inspection. When he put the leading gear handle down for landing, he didn't get a positive gear lock light, so he cycled the leading gear several times in an attempt to get a positive gear down and locked indication. He attempted to hand pump the gear down, but still had no positive down and locked light. He landed the airplane, and during the landing roll the right main landing gear failed. Postaccident examination of the engine driven hydraulic pump pressure revealed that its output was 200 pounds per square inch (psi). The maintenance personnel that worked on the airplane said that normal pump pressure output was 2,725 psi. The hydraulic pump was replaced, and the landing gear cycled normally.
NTSB Probable Cause Narrative
The partial failure of the engine driven hydraulic pump.
Event Information
Type of EventAccident 
Event Date11/20/1999 
Event Day of the WeekSaturday 
Time of Event2100 
Event Time ZoneMountain Standard Time 
Event CitySHERIDAN  
Event StateWYOMING 
Event Country-- 
Zipcode of the event site82801  
Event Date Year1999 
Event Date Month11 
MidAir Collision IndicatorNo 
On Ground Collision occurred ?No 
Event Location Latitude  
Event Location Longitude  
Event Location AirportSHERIDAN COUNTY AIRPORT  
Event Location Nearest Airport IDSHR  
Indicates whether the acc/inc occurred off or on an airportOn Airport 
Distance from airport in statute miles-- 
Degrees magnetic from airport-- 
Airport Elevation4021 
Weather Briefing CompletenessUnknown 
Investigator's weather sourceWeather Observation Facility 
Time of the weather observation2151 Mountain Standard Time 
Direction of event from weather observation facility (degrees)
Weather Observation Facility IDSHR  
Elevation of weather observation facility4021 
Distance of event from weather observation facility (units?)
Time Zone of the weather observationMST 
Lighting ConditionsNight/Bright 
Lowest Ceiling Height
Lowest Non-Ceiling Height
Sky/Lowest/Cloud ConditionsClear 
Sky Condition for Lowest CeilingNone 
Visibility Runway Visual Range (Feet)
Visibility Runway Visual Value (Statute Miles)
Visibility (Statute Miles) 10 
Air Temperature at event time (in degrees celsius)
Dew Point at event time (in degress fahrenheit)-1 
Wind Direction (degrees magnetic)
Variable Wind IndicatorUnknown 
Wind Speed (knots)
Wind Velocity Indicator Unknown 
Wind Gust IndicatorNot Gusting 
Wind Gust (knots)
Altimeter Setting at event time (in. Hg) 29 
Density Altitude (feet)-- 
Intensity of PrecipitationUnknown 
METAR weather report -- 
Event Highest InjuryNone 
On Ground, Fatal Injuries
On Ground, Minor Injuries
On Ground, Serious Injuries
Injury Total Fatal-- 
Injury Total Minor-- 
Injury Total None
Injury Total Serious-- 
Injury Total All-- 
Investigating AgencyNTSB 
NTSB Docket Number (internal use)1387 
NTSB Notification Source-- 
NTSB Notification DateNov 20 1999 12:00AM 
NTSB Notification Time1053 
Fiche Number and/or location -used to find docket informationIMAGE 
Date of most recent change to recordJan 10 2001 9:53AM 
User who most recently changed recorddbo  
Basic weather conditionsVisual Meteorological Cond 
FAA District Office-- 
Aircraft Involved
Aircraft #1
Aircraft Registration NumberN3928Y 
NTSB NumberDEN00LA020  
Missing Aircraft Indicator
Federal Aviation Reg. PartPart 91: General Aviation 
Type of Flight Plan filedNone 
Flight plan Was Activated?-- 
DamageSubstantial 
Aircraft FireNone 
Aircraft ExplosionNone 
Aircraft Manufacturer's Full NameCessna  
Aircraft Model210D  
Aircraft Series Identifier210D  
Aircraft Serial Number21058428  
Certified Max Gross Weight3100 
Aircraft CategoryAirplane 
Aircraft Registration ClassU.S. Registered/U.S. Soil 
Aircraft is a homebuilt?No 
Flight Crew Seats-- 
Cabin Crew Seats-- 
Passenger Seats-- 
Total number of seats on the aircraft
Number of Engines
Fixed gear or retractable gearRetractable 
Aircraft, Type of Last InspectionAnnual 
Date of Last InspectionNov 20 1999 12:00AM 
Airframe hours since last inspection
Airframe Hours3725 
ELT InstalledYes 
ELT ActivatedNo 
ELT Aided Location of Event SiteUnknown 
ELT Type-- 
Aircraft Owner NameJOHN W. KRENEK  
Aircraft Owner Street Address2009 LIBERTY CT.  
Aircraft Owner CitySHERIDAN  
Aircraft Owner StateWY 
Aircraft Owner Country  
Aircraft Owner Zipcode82801  
Operator is an individual?-- 
Operator Name  
Operator Same as Owner?Yes 
Operator Is Doing Business As-- 
Operator Address Same as Owner?Yes 
Operator Street Address  
Operator City  
Operator State  
Operator Country  
Operator Zip code  
Operator Code  
Owner has at least one certificateNone 
Other Operator of large aircraft?No 
Certified for Part 133 or 137 OperationUnknown 
Operator Certificate Number-- 
Indicates whether an air carrier operation was scheduled or not-- 
Indicates Domestic or International Flight-- 
Operator carrying Pax/Cargo/Mail-- 
Type of Flying (Per_Bus / Primary)Personal 
Second Pilot on BoardNo 
Departure Point Same as EventNo 
Departure Airport CodeBIL  
Departure CityBILLINGS  
Departure StateMT 
Departure Country  
Departure Time2025 
Departure Time ZoneMST 
Destination Same as Local Fltcrash at destination city 
Destination Airport CodeSHR  
Destination City  
Destination State  
Destination Country  
Specific Phase of Flight-- 
Report sent to ICAO?-- 
Evacuation occurred-- 
Date of most recent change to recordJan 10 2001 12:27PM 
User who most recently changed recorddbo  
Since inspection or accident-- 
Event Location Runway Number and Location14  
Runway Length8300 
Runway Width100 
Sight Seeing flightNo 
Air Medical FlightNo 
Medical Flight--