Aircraft Accident/Incident Report

Parowan, Utah 84761
Tuesady, June 15, 2010 15:33 MDT

NTSB Narrative Summary Released at Completion of Accident

Two glider pilots had entered the same thermal while participating in a competition task that required them to fly to a point about 90 miles from their point of departure and then to return. Both pilots where flying back to the point of departure after reaching the turnaround point when they entered the thermal. During their first full turn in the thermal, the left wing of one of the gliders and the nose of other glider came in contact. The impact resulted in the separation of the outboard three feet of the wing of one glider and the denting of the lower nose area of the other. The pilots of both gliders were able to return to the point of departure, where they both completed uneventful landings. Neither pilot had seen the other glider as he entered the thermal.

NTSB Probable Cause Narrative

The pilot's failure to see and avoid the other glider climbing in the same thermal.

Event Information

Type of Event Accident
Event Date 6/15/2010
Event Day of the Week Tuesday
Time of Event 1533
Event Time Zone Mountain Daylight Time
Event City Parowan
Event State UTAH
Event Country --
Zipcode of the event site 84761
Event Date Year 2010
Event Date Month 6
MidAir Collision Indicator Yes
On Ground Collision occurred ? --
Event Location Latitude 385848N
Event Location Longitude 1113154W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Pilot
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID --
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height 5000
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) 10
Air Temperature at event time (in degrees celsius) 27
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 200
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 13
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) --
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 2
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 27216
NTSB Notification Source FAA Operations Center
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Jul 23 2010 10:13PM
User who most recently changed record stam
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft #2

Aircraft Registration Number N455S N514TW
NTSB Number WPR10LA294A WPR10LA294B
Missing Aircraft Indicator -- --
Federal Aviation Reg. Part Part 91: General Aviation Part 91: General Aviation
Type of Flight Plan filed None None
Flight plan Was Activated? -- --
Damage Substantial Minor
Aircraft Fire None None
Aircraft Explosion None None
Aircraft Manufacturer's Full Name SCHLEICHER ALEXANDER GMBH & CO SCHEMPP-HIRTH
Aircraft Model ASH 26 E VENTUS 2CT
Aircraft Series Identifier -- --
Aircraft Serial Number 26183 191
Certified Max Gross Weight 1157 1157
Aircraft Category Glider Glider
Aircraft Registration Class -- --
Aircraft is a homebuilt? No No
Flight Crew Seats -- --
Cabin Crew Seats -- --
Passenger Seats -- --
Total number of seats on the aircraft 1 1
Number of Engines 1 1
Fixed gear or retractable gear Retractable Retractable
Aircraft, Type of Last Inspection Annual Conditional
Date of Last Inspection Feb 3 2010 12:00AM Mar 15 2010 12:00AM
Airframe hours since last inspection -- --
Airframe Hours 1209 694
ELT Installed No No
ELT Activated Unknown Unknown
ELT Aided Location of Event Site Unknown Unknown
ELT Type -- --
Aircraft Owner Name SALKELD EDWIN M JR TRUSTEE WELLES GILLETT TIM
Aircraft Owner Street Address -- --
Aircraft Owner City LA MESA HORSEHEADS
Aircraft Owner State CA NY
Aircraft Owner Country USA USA
Aircraft Owner Zipcode 91943-2638 14845-0448
Operator is an individual? No No
Operator Name SALKELD EDWIN M JR TRUSTEE WELLES GILLETT TIM
Operator Same as Owner? Yes Yes
Operator Is Doing Business As -- --
Operator Address Same as Owner? Yes Yes
Operator Street Address -- --
Operator City LA MESA HORSEHEADS
Operator State CA NY
Operator Country USA USA
Operator Zip code 91943-2638 14845-0448
Operator Code -- --
Owner has at least one certificate None None
Other Operator of large aircraft? No 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) Personal Personal
Second Pilot on Board No No
Departure Point Same as Event No No
Departure Airport Code 1L9 1L9
Departure City Parowan Parowan
Departure State UT UT
Departure Country USA USA
Departure Time 1403 1344
Departure Time Zone MDT MDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere dest & departure same, accident can occur anywhere
Destination Airport Code 1L9 1L9
Destination City Parowan Parowan
Destination State UT UT
Destination Country USA USA
Specific Phase of Flight -- --
Report sent to ICAO? -- --
Evacuation occurred -- --
Date of most recent change to record Jul 23 2010 10:13PM Jul 23 2010 10:13PM
User who most recently changed record stam stam
Since inspection or accident Time of Accident Time of Accident
Event Location Runway Number and Location N/A N/A
Runway Length -- --
Runway Width -- --
Sight Seeing flight No No
Air Medical Flight No No
Medical Flight -- --