Boulder Municipal Airport
Aircraft Accident/Incident Report

Boulder, Colorado 80301
Tuesady, September 9, 2008 11:00 MDT

NTSB Narrative Summary Released at Completion of Accident

According to the pilot, he was conducting his fourth solo flight and during the aero tow he "ballooned" and drifted to the right. The pilot repositioned the glider, slack developed in the tow rope, and the rope disconnected from the glider approximately 10 feet above the ground. The pilot did not use the dive brake to descend and landed long, resulting in substantial damage. An examination of the glider systems, conducted by the FAA, revealed no anomalies.

NTSB Probable Cause Narrative

The pilot's failure to use the dive brake during landing resulting in a long landing and collision.

Event Information

Type of Event Accident
Event Date 9/9/2008
Event Day of the Week Tuesday
Time of Event 1100
Event Time Zone Mountain Daylight Time
Event City Boulder
Event State COLORADO
Event Country --
Zipcode of the event site 80301
Event Date Year 2008
Event Date Month 9
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 400221N
Event Location Longitude 1051332W
Event Location Airport Boulder Municipal Airport
Event Location Nearest Airport ID KBDU
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles 1
Degrees magnetic from airport --
Airport Elevation 5288
Weather Briefing Completeness --
Investigator's weather source Weather Observation Facility
Time of the weather observation 955 Mountain Daylight Time
Direction of event from weather observation facility (degrees) 330
Weather Observation Facility ID BJC
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) 10
Time Zone of the weather observation MDT
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height 12000
Sky/Lowest/Cloud Conditions Scattered
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) 8
Wind Direction (degrees magnetic) --
Variable Wind Indicator --
Wind Speed (knots) --
Wind Velocity Indicator Calm
Wind Gust Indicator --
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.04
Density Altitude (feet) --
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) 24523
NTSB Notification Source FAA DEN FSDO
NTSB Notification Date Sep 17 2008 12:00AM
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Oct 20 2008 5:27PM
User who most recently changed record gamw
Basic weather conditions Visual Meteorological Cond
FAA District Office Denver FAA Flight Standards District Office

Aircraft Involved

Aircraft #1

Aircraft Registration Number N17939
NTSB Number DEN08CA157
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 SCHWEIZER
Aircraft Model SGS 2-33A
Aircraft Series Identifier --
Aircraft Serial Number 294
Certified Max Gross Weight 1040
Aircraft Category Glider
Aircraft Registration Class --
Aircraft is a homebuilt? No
Flight Crew Seats 2
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 2
Number of Engines --
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection --
Date of Last Inspection --
Airframe hours since last inspection --
Airframe Hours --
ELT Installed No
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Mile High Gliding Inc
Aircraft Owner Street Address 5534 Independence Road
Aircraft Owner City Boulder
Aircraft Owner State CO
Aircraft Owner Country USA
Aircraft Owner Zipcode 80301
Operator is an individual? No
Operator Name Mile High Gliding Inc
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address 5534 Independence Road
Operator City Boulder
Operator State CO
Operator Country USA
Operator Zip code 80301
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? No
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) Instructional
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code KBDU
Departure City Boulder
Departure State CO
Departure Country USA
Departure Time 1100
Departure Time Zone MDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code KBDU
Destination City Boulder
Destination State CO
Destination Country USA
Specific Phase of Flight Landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Oct 20 2008 12:12PM
User who most recently changed record kaij
Since inspection or accident --
Event Location Runway Number and Location 08
Runway Length 4100
Runway Width 75
Sight Seeing flight No
Air Medical Flight No
Medical Flight --