- Date
- June 15, 2010, 15:33 local (21:33 UTC)
- Place
- Parowan, UT
- Injuries
- 2 uninjured
- Phase of flight
- Maneuvering
- Defining events
- Maneuvering: Midair collisionManeuvering: Midair collision
- Weather
- Visual (VMC) · Day
- Status
- Completed · report October 21, 2010
- Report
- Approved by Office Director
- NTSB office
- Western Pacific Region
- Parties
- Salt Lake FSDO
- FAA reports
- 20100615036242A20100615036332I
- Case key
- 76332
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The pilot's failure to see and avoid the other glider climbing in the same thermal.
Findings · 2
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
N455S · Schleicher Alexander ASH 26 E
N514TW · Schempp-Hirth Ventus 2CT
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
N455S · Schleicher Alexander ASH 26 E
N514TW · Schempp-Hirth Ventus 2CT
Analysis
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.
Factual narrative
On June 15, 2010, at 1533 mountain daylight time, a Schleicher Alexander GMBD ASH 26E glider, N455S, and a Schempp-Hirth Ventus 2CT glider, N514TW, were involved in a mid-air collision about 75 miles northeast of Parowan, Utah. Neither pilot was injured. Both pilots were the sole occupants of their respective gliders. The ASH 26E sustained substantial damage, and the Ventus 2CT sustained minor damage. Both pilots were operating under the provisions of 14 Code of Federal Regulations Part 91 in visual meteorological conditions. Both gliders departed Parowan, Utah (N455S at 1403, and N514TW at 1344), and Parowan was the planned final destination for both pilots. No flight plan had been filed. According to both pilots, they were competing in a glider competition task that required them to depart a point near Parowan, fly to a point about 90 miles northeast of Parowan, and then to return to Parowan for landing. Both pilots where flying back to Parowan after reaching the turnaround point when they entered the same thermal and began to climb. During their first full turn in the thermal, the left wing of the ASH 26E and the nose of the Ventus 2CT came in contact. The impact resulted in the separation of the outboard three feet of the wing of the ASH 26E, and denting of the lower nose area of the Ventus 2CT. The pilots of both gliders were able to return to Parowan, where they both completed uneventful landings. Both pilot's stated that they had not seen the other glider as they entered the thermal, and both pilot's stated that they realized that it was their responsibility to see and avoid any other gliders that were climbing in the same thermal.
Aircraft · 2
- Registration
- N455S
- Reported as
- Schleicher Alexander ASH 26 E
- Category
- Glider
- Serial number
- 26183
- Airframe hours
- 1,209
- Engine
- Midwest Engines AE50RAB, 50 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Salkeld Edwin M Jr Trustee
- Registered owner
- Salkeld Edwin M Jr Trustee
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · February 3, 2010
- Departed
- 1L9 · Parowan, UT
- Destination
- 1L9 · Parowan, UT
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
- Registration
- N514TW
- Reported as
- Schempp-Hirth Ventus 2CT
- Category
- Glider
- Serial number
- 191
- Airframe hours
- 694
- Engine
- Solo 2350, 26 horsepower, reciprocating
- Damage
- Minor damage
- Flight
- Personal · Part 91
- Operator
- Welles Gillett Tim
- Registered owner
- Welles Gillett Tim
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Condition · March 15, 2010
- Departed
- 1L9 · Parowan, UT
- Destination
- 1L9 · Parowan, UT
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot, aircraft N455S
- Age
- 74
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, With waivers/limitations
- Last flight review
- March 25, 2009
- Seat
- Front
- Flight hours
- 4,208 total · 1,208 in this make and model · 42 in the last 90 days
- Role
- Pilot, aircraft N514TW
- Age
- 71
- Injuries
- None
- Certificates
- Flight instructor, Commercial
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, Without waivers/limitations
- Last flight review
- July 24, 2008
- Seat
- Front
- Flight hours
- 7,279 total · 680 in this make and model · 7,250 as pilot in command
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 200° at 13 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 81 °F
Docket · 2
The files NTSB released with the investigation on July 23, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.3 MB in all.
FAA reports on this event · 2
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.