Aircraft Incident/Accident Report
Jefferson County Airport

Broomfield, Colorado 80021
Friday, June 29, 1990 9:15 MDT

| More
NTSB Narrative Summary Released at Completion of Accident
THE PILOT, WITH HIS PASSENGER/SON, WAS IN THE LANDING PATTERN AT JEFFERSON COUNTY AIRPORT, BROOMFIELD, COLORADO. HE SAID THAT HE WAS DISTRACTED BY ANOTHER AIRCRAFT IN THE LANDING PATTERN AND FORGOT TO LOWER THE LANDING GEAR. THE AIRCRAFT LANDED WITH THE GEAR UP.
NTSB Probable Cause Narrative
THE FAILURE OF THE PILOT TO EXTEND THE LANDING GEAR FOR LANDING. CONTRIBUTING FACTORS WERE THE PILOT DIVERTING HIS ATTENTION FROM THE TASK AT HAND AND FAILURE TO USE A CHECKLIST.
Event Information
Type of EventAccident 
Event Date6/29/1990 
Event Day of the WeekFriday 
Time of Event915 
Event Time ZoneMountain Daylight Time 
Event CityBROOMFIELD  
Event StateCOLORADO 
Event Country-- 
Zipcode of the event site80021  
Event Date Year1990 
Event Date Month
MidAir Collision IndicatorNo 
On Ground Collision occurred ?No 
Event Location Latitude  
Event Location Longitude  
Event Location AirportJEFFERSON COUNTY  
Event Location Nearest Airport IDBJC  
Indicates whether the acc/inc occurred off or on an airportOn Airport 
Distance from airport in statute miles
Degrees magnetic from airport
Airport Elevation5658 
Weather Briefing CompletenessUnknown 
Investigator's weather sourceWeather Observation Facility 
Time of the weather observation915 Mountain Daylight Time 
Direction of event from weather observation facility (degrees)
Weather Observation Facility IDBJC  
Elevation of weather observation facility5658 
Distance of event from weather observation facility (units?)
Time Zone of the weather observationMDT 
Lighting ConditionsDay 
Lowest Ceiling Height
Lowest Non-Ceiling Height25000 
Sky/Lowest/Cloud ConditionsScattered 
Sky Condition for Lowest CeilingNone 
Visibility Runway Visual Range (Feet)
Visibility Runway Visual Value (Statute Miles)
Visibility (Statute Miles) 40 
Air Temperature at event time (in degrees celsius)-18 
Dew Point at event time (in degress fahrenheit)-18 
Wind Direction (degrees magnetic)80 
Variable Wind IndicatorUnknown 
Wind Speed (knots)
Wind Velocity Indicator Unknown 
Wind Gust IndicatorUnknown 
Wind Gust (knots)
Altimeter Setting at event time (in. Hg) -- 
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)687 
NTSB Notification Source-- 
NTSB Notification DateJun 29 1990 12:00AM 
NTSB Notification Time1010 
Fiche Number and/or location -used to find docket information41742 
Date of most recent change to recordDec 18 2002 11:28AM 
User who most recently changed recordNTSB\GIUV  
Basic weather conditionsVisual Meteorological Cond 
FAA District Office-- 
Aircraft Involved
Aircraft #1
Aircraft Registration NumberN6391P 
NTSB NumberDEN90LA148  
Missing Aircraft Indicator
Federal Aviation Reg. PartPart 91: General Aviation 
Type of Flight Plan filedNone 
Flight plan Was Activated?-- 
DamageSubstantial 
Aircraft FireGround 
Aircraft ExplosionGround 
Aircraft Manufacturer's Full NamePIPER  
Aircraft ModelPA24-250  
Aircraft Series IdentifierPA24-250  
Aircraft Serial Number24-1501  
Certified Max Gross Weight2900 
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 InspectionUnknown 
Date of Last Inspection-- 
Airframe hours since last inspection
Airframe Hours-- 
ELT InstalledYes 
ELT ActivatedNo 
ELT Aided Location of Event SiteNo 
ELT Type-- 
Aircraft Owner NameDAVID R. TOBLER  
Aircraft Owner Street Address10307 KING COURT  
Aircraft Owner CityWESTMINISTER  
Aircraft Owner StateCO 
Aircraft Owner Country  
Aircraft Owner Zipcode80030  
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 CodeZV2  
Departure CityLONGMONT  
Departure StateCO 
Departure Country  
Departure Time930 
Departure Time ZoneMDT 
Destination Same as Local Fltcrash at destination city 
Destination Airport Code  
Destination City  
Destination State  
Destination Country  
Specific Phase of FlightLanding 
Report sent to ICAO?-- 
Evacuation occurred-- 
Date of most recent change to recordJan 2 2001 10:35AM 
User who most recently changed recorddbo  
Since inspection or accident-- 
Event Location Runway Number and Location29R 
Runway Length9000 
Runway Width100 
Sight Seeing flightNo 
Air Medical FlightNo 
Medical Flight--