- Date
- June 11, 1998, 12:15 local (18:15 UTC)
- Place
- Green River, UT
- Injuries
- 1 serious
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N511MRolladen-Schneider LS-6A
- Weather
- Visual (VMC) · Day
- Status
- Completed · report February 15, 2001
- Report
- Approved by Office Director
- FAA report
- 19980611013239A
- Case key
- 20644
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 maintain airspeed. Factor's were the unforecasted weather (tail wind) and the inadvertent stall/spin.
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.
Analysis
According to the co-owner of the glider, the pilot was given an auto-tow launch from the runway and he believed that the pilot released at approximately 700 feet agl. The co-owner observed the glider circling southwest of the runway, but was losing altitude. The pilot stated that he encountered 'heavy sink almost immediately after tow release.' The co-owner further observed the glider fly over the runway, but 'was too high too land straight ahead.' The pilot further reported that 'he turned left to return to the runway and the glider began to rotate left.' The pilot said that he 'got the right rudder in and the rotation stopped within 90 degrees.' The co-owner stated that 'an apparent wind gust from above or behind caused the glider to nose down.' The pilot stated that 'just as the rotation stopped, the left wing tip impacted the ground.'
Factual narrative
On June 11, 1998, at 1215 mountain daylight time, a Rolladen-Schneider LS-6 glider, N511M, was substantially damaged after impacting terrain during landing at Green River Municipal Airport, Green River, Utah. The private pilot, the sole occupant onboard, was seriously injured. The glider was being operated by the owner under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the local personal flight which had originated approximately 3 minutes before the accident. No flight plan was filed.
According to the co-owner of the glider, the pilot was given an auto-tow launch from runway 13 (5,600 feet X 60 feet, elevation 4225 feet) and he believed that the pilot released at approximately 700 feet agl. The co-owner observed the glider circling southwest of the runway, losing altitude. The pilot stated that he encountered "heavy sink almost immediately after tow release." The co-owner further observed the glider fly over runway 13, but "was too high to land straight ahead." The pilot further reported that "he turned left to return to the runway and the glider began to rotate left."
The pilot told the Investigator-In-Charge (IIC) that he "got the right rudder in and the rotation stopped within 90 degrees." The co-owner stated that "an apparent wind gust from above or behind caused the glider to nose down." The pilot stated that "just as the rotation stopped, the left wing tip impacted the ground." The glider came to rest facing approximately 220 degrees. The left wing and the tail section were substantially damaged. The canopy, flight deck, and instrument panel were destroyed.
Aircraft
- Registration
- N511M
- Reported as
- Rolladen-Schneider LS-6A
- Category
- Glider
- Serial number
- 6037
- Airframe hours
- 915
- Engine
- unknown
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- Walter J. Lafford II
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Annual · January 1, 1998 · 55 hours before
- Departed
- U34
- Destination
- PVC · Price, UT
- Airport
- U34 · Green River, runway 13, 5,600 × 75 ft, asphalt
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
- 53
- Certificate
- Private
- Seat
- Front
- Flight hours
- 910 total · 480 in this make and model · 860 as pilot in command · 20 in the last 90 days · 15 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 150° at 3 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 70 °F, dew point 39 °F
- Altimeter
- 29.00 inHg
- Observed at
- GJT, 100 nm away
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N511M · 1
Matched to the same aircraft by N-number and date.