Jeffco Airport
Aircraft Accident/Incident Report

Broomfield, Colorado 80021
Sunday, March 21, 2004 12:00 MST

NTSB Narrative Summary Released at Completion of Accident

According to the pilot, he had been experiencing electrical problems for the majority of his flight. The pilot reported that he entered a downwind for runway 29R, lowered his landing gear and set 15 degrees flaps. The pilot noticed that the flap indicator was not down so he raised the flaps lever to avoid problems later. The pilot did not visually verify that his gear was down. During the landing flare, both propellers came in contact with the ground and the airplane slid along the runway for several hundred feet, substantially damaging a bulkhead.

NTSB Probable Cause Narrative

the pilot's improper in-flight planning/decision and his failure to verify the landing gear position. Factors contributing to the accident were the pilot's diverted attention due to the electrical failure.

Event Information

Type of Event Accident
Event Date 3/21/2004
Event Day of the Week Sunday
Time of Event 1200
Event Time Zone Mountain Standard Time
Event City Broomfield
Event State COLORADO
Event Country --
Zipcode of the event site 80021
Event Date Year 2004
Event Date Month 3
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 395430N
Event Location Longitude 1050700W
Event Location Airport JEFFCO
Event Location Nearest Airport ID BJC
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles 1
Degrees magnetic from airport 290
Airport Elevation 5670
Weather Briefing Completeness Not pertinent
Investigator's weather source Weather Observation Facility
Time of the weather observation 1145 Mountain Standard Time
Direction of event from weather observation facility (degrees) 10
Weather Observation Facility ID BJC
Elevation of weather observation facility 5670
Distance of event from weather observation facility (units?) 1
Time Zone of the weather observation MST
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height 6000
Sky/Lowest/Cloud Conditions Few
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 50
Air Temperature at event time (in degrees celsius) 11
Dew Point at event time (in degress fahrenheit) -5
Wind Direction (degrees magnetic) --
Variable Wind Indicator Variable
Wind Speed (knots) 5
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.33
Density Altitude (feet) 6064
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 15656
NTSB Notification Source FAA Comm Ctr
NTSB Notification Date Mar 21 2003 12:00AM
NTSB Notification Time 1305
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Jun 30 2004 12:15PM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Denver FAA FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N3465G
NTSB Number DEN04CA054
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed VFR
Flight plan Was Activated? Yes
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Cessna
Aircraft Model T310R
Aircraft Series Identifier --
Aircraft Serial Number 310R0844
Certified Max Gross Weight 5680
Aircraft Category Airplane
Aircraft Registration Class U.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 5
Number of Engines 2
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Feb 12 2004 12:00AM
Airframe hours since last inspection 29
Airframe Hours 3014
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Conn-Behr Aircraft LLK
Aircraft Owner Street Address 7217 Spring Creek Circle #C
Aircraft Owner City Longmont
Aircraft Owner State CO
Aircraft Owner Country USA
Aircraft Owner Zipcode 80503
Operator is an individual? No
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 certificate None
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation --
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 Board No
Departure Point Same as Event No
Departure Airport Code GNB
Departure City Grandby
Departure State CO
Departure Country USA
Departure Time 1100
Departure Time Zone MST
Destination Same as Local Flt crash at destination city
Destination Airport Code BJC
Destination City Broomfield
Destination State CO
Destination Country USA
Specific Phase of Flight Landing - flare/touchdown
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record Apr 21 2004 10:27AM
User who most recently changed record MCBM
Since inspection or accident Time of Accident
Event Location Runway Number and Location 29R
Runway Length 9000
Runway Width 100
Sight Seeing flight No
Air Medical Flight No
Medical Flight --