Individually Owned: 150,657
Corporate Owned: 137,281
Boulder Municipal Airport
Aircraft Accident/Incident Report
Boulder, Colorado 80301
Saturday, October 19, 2013 10:45 MDT
NTSB Narrative Summary Released at Completion of Accident
The pilot reported that during the takeoff roll, shortly before liftoff, the airplane began to swerve to the left. He was unable to regain directional control, and the airplane departed the left side of the runway. A postaccident examination of the runway revealed a wavy, double-line marking consistent with the width of a main landing gear tire. The marking began about 1,400 feet down the runway and continued another 400 feet until it departed the left runway edge. The pilot attributed his loss of directional control to a sudden deflation of the left main landing gear tire. The postaccident examination confirmed that the left main tire was deflated and loose in its wheel assembly. The examination did not reveal any additional anomalies with the airplane that would have prevented normal operation. The left swerve encountered during the takeoff roll was likely due to a sudden loss of pressure in the left main landing gear tire, which resulted in increased surface drag.
NTSB Probable Cause Narrative
The sudden loss of tire pressure during takeoff roll, which resulted in a loss of directional control.
Event Information
| Type of Event | Accident |
| Event Date | 10/19/2013 |
| Event Day of the Week | Saturday |
| Time of Event | 1045 |
| Event Time Zone | Mountain Daylight Time |
| Event City | Boulder |
| Event State | COLORADO |
| Event Country | -- |
| Zipcode of the event site | 80301 |
| Event Date Year | 2013 |
| Event Date Month | 10 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 400222N |
| Event Location Longitude | 1051333W |
| Event Location Airport | Boulder Municipal Airport |
| Event Location Nearest Airport ID | BDU |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 5288 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1052 Mountain Daylight Time |
| Direction of event from weather observation facility (degrees) | 21 |
| Weather Observation Facility ID | LMO |
| Elevation of weather observation facility | 5055 |
| Distance of event from weather observation facility (units?) | 8 |
| Time Zone of the weather observation | MDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 14 |
| Dew Point at event time (in degress fahrenheit) | 0 |
| Wind Direction (degrees magnetic) | 40 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 3 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.04 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | METAR KLMO 191652Z AUTO 04003KT 10SM CLR 14/00 A30 |
| 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 | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 32168 |
| NTSB Notification Source | NTSB Duty Officer, Aaron Sauer |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Nov 5 2013 6:54PM |
| User who most recently changed record | foxt |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N282RD |
| NTSB Number | CEN14LA011 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | DAVENPORT |
| Aircraft Model | LONG EZ |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 282 |
| Certified Max Gross Weight | 1750 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | Yes |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Conditional |
| Date of Last Inspection | Jul 27 2013 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 762 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | C91 |
| Aircraft Owner Name | UltraPure Air, LLC |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Setauket |
| Aircraft Owner State | NY |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 11733-3108 |
| Operator is an individual? | No |
| Operator Name | UltraPure Air, LLC |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | Setauket |
| Operator State | NY |
| Operator Country | USA |
| Operator Zip code | 11733-3108 |
| 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 | Yes |
| Departure Airport Code | BDU |
| Departure City | Boulder |
| Departure State | CO |
| Departure Country | USA |
| Departure Time | 1045 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | BDU |
| Destination City | Boulder |
| Destination State | CO |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Nov 5 2013 4:56PM |
| User who most recently changed record | foxt |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 08 |
| Runway Length | 4100 |
| Runway Width | 75 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |