DFW05CA096

NTSB accident investigation · Glaser-Dirks DG 600 · Kent, TX · March 25, 2005

Accident · No injuriesData collectionFinal report
Date
March 25, 2005, 16:00 local (21:00 UTC)
Place
Kent, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N787TGlaser-Dirks DG 600
Weather
Visual (VMC) · Day
Status
Completed · report July 7, 2005
Report
Approved by Office Director
Parties
Lubbock FSDO
FAA report
20050325004519A
Case key
61209

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's misjudgement of distance and altitude during a cross-country soaring flight. A contributing factor was the lack of suitable terrain for the landing.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherManeuvering
Weather condition - no thermal lift
Distance/altitude - misjudgedPilot in commandCause
Precautionary landing - attemptedPilot in command
On ground/water collision with objectLanding - roll
Terrain condition - none suitableFactor
Terrain condition - high vegetation

Analysis

The 3,460-hour commercial glider pilot reported that, while soaring, he encountered poor thermal conditions and the glider began to lose altitude. The pilot observed a field by a ranch house and elected to land there. As the pilot approached the field, he observed high power lines at the approach end and a fence and shed at the far end of the field. When the glider was approximately 300 feet above ground level (agl), the pilot decided that the field would be an unsuitable place to land and turned approximately 270 degrees and executed a precautionary landing in the "best part of a bad area." When the glider was two to three feet agl, the left wingtip impacted a cactus. The glider then pivoted approximately 70 degrees, slid, and the right wing then impacted another cactus.

Factual narrative

On March 25, 2005, approximately 1600 central daylight time, a Glaser-Dirks DG 600 glider, N787T, sustained substantial damage during an off-airport landing to a field near Kent, Texas. The commercial glider pilot, sole occupant, was not injured. Visual meteorological conditions prevailed and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The cross-country flight originated from the Marfa Municipal Airport (MRF), near Marfa, Texas, approximately 1300, for a round robin cross-country flight to Culberson County Airport (VHN), near Van Horn, Texas.

According to the 3,460-hour pilot, while soaring east of VHN on his return flight to MRF, he encountered poor thermal conditions and the glider began to lose altitude. The pilot observed a field by a ranch house and elected to land there. As the pilot approached the field, he observed high power lines at the approach end and a fence and shed at the far end of the field. When the glider was approximately 300 feet above ground level (agl), the pilot decided that the field would be an unsuitable place to land and turned approximately 270 degrees and executed a precautionary landing in the "best part of a bad area." When the glider was two to three feet agl, the left wingtip impacted a cactus. The glider then pivoted approximately 70 degrees, slid, and the right wing then impacted another cactus.

When asked how this accident could have been prevented, the pilot stated that he "could have turned back to Van Horn Airport upon encountering heavy sink."

According to the pilot, structural damage included a crack to the right front section of the fuselage, a crack in the fuselage behind the wings, a crack in the fuselage at the vertical stabilizer attachment point, and damage to the leading edge of the left wing. The canopy was also broken, and the main landing gear was bent approximately 30 degrees to the left.

At 1555, the automated weather observing system at MRF, located approximately 40 nautical miles south of the accident site, reported wind from 250 degrees at 12 knots, gusting to 21 knots, 8 statute miles visibility, a clear sky, temperature 72 degrees Fahrenheit, dew point 20 degrees Fahrenheit, and a barometric pressure setting of 29.90 inches of Mercury.

Aircraft

Registration
N787T
Reported as
Glaser-Dirks DG 600
Category
Glider
Serial number
6-3
Airframe hours
1,560
Engine
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Albert Heath
Registered owner
Rokki Roberts
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · July 1, 2004
Departed
MRF · Marfa, TX
Destination
MRF · Marfa, TX
Airport
VHN · Culberson County Airport

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

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
66
Injuries
None
Certificate
Commercial
Last flight review
April 27, 2003
Seat
Single
Flight hours
3,460 total · 3,460 in this make and model · 3,460 as pilot in command · 15 in the last 90 days · 15 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
3 knots
Visibility
8 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point 19 °F
Altimeter
29.89 inHg
Observed at
MRF

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.