- Date
- June 16, 2004, 17:20 local (21:20 UTC)
- Place
- Warren, VT
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Approach
- Aircraft
- N21VTSchleicher ASK-21
- Weather
- Visual (VMC) · Day
- Status
- Completed · report July 7, 2005
- Report
- Approved by Office Director
- Parties
- FAA/FSDO
- FAA report
- 20040616019299A
- Case key
- 59456
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 improper pre-flight and in-flight planning, which resulted in a forced landing after experiencing a loss of thermal lift. A factor was the loss of thermal lift.
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
After flying for approximately 2 hours, as the pilots were returning to the airport, the wind "went southwest at 5 knots," decreasing the available lift. Approximately 4 miles from the airport, it became apparent that they were too low to make it to the airport, and they chose a field to land in. While on approach to the field, "persistent sink" made attaining the field "marginal," and it became necessary to increase the pitch of the glider to clear a 15-foot tall tree. As a result, the glider stalled and "mushed" to the ground.
Factual narrative
On June 16, 2004, at 1720 eastern daylight time, a Schleicher ASK-21, N21VT, was substantially damaged during an off airport landing in Warren, Vermont. The two certificated private pilots received minor injuries. Visual meteorological conditions prevailed and no flight plan was filed for the instructional flight conducted under 14 CFR Part 91.
According to the pilot-in-command, the purpose of the flight was to practice cross-country gliding techniques. The pilots departed from the Warren-Sugarbush Airport (0B7), Warren, Vermont, flew about 40 miles to the north, then 20 miles to the southeast, and finally 25 miles to the southwest to return to the airport. The lift was both thermal and ridge lift, with the glider experiencing an average maximum height of 2,800 feet above the ground. After flying for approximately 2 hours, as the pilots were returning to the airport, the wind "went southwest at 5 knots," decreasing the available lift. Approximately 4 miles from the airport, it became apparent that they were too low to make it to the airport, and they chose a field to land in. While on approach to the field, "persistent sink" made attaining the field "marginal," and it became necessary to increase the pitch of the glider to clear a 15-foot tall tree. As a result, the glider stalled and "mushed" to the ground.
The winds reported at the Edward F Knapp State Airport (MPV), Montpelier, Vermont, at 1651, were from 330 degrees at 7 knots.
Aircraft
- Registration
- N21VT
- Reported as
- Schleicher ASK-21
- Category
- Glider
- Serial number
- 21266
- Engine
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- Sugarbush Soaring Association
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · June 11, 2004 · 5 hours before
- Departed
- 0B7 · Warren, VT
- Destination
- 0B7 · Warren, VT
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 77
- Injuries
- Minor
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Last flight review
- February 3, 2003
- Seat
- Rear
- Flight hours
- 5,202 total · 12 in this make and model · 5,140 as pilot in command · 0 in the last 90 days · 0 in the last 30 days · 0 in the last 24 hours
- Role
- Pilot
- Age
- 54
- Injuries
- Minor
- Certificate
- Private
- Last flight review
- June 1, 2003
- Seat
- Front
- Flight hours
- 550 total · 6 in this make and model · 500 as pilot in command · 10 in the last 90 days · 5 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 330° at 7 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 75 °F, dew point 48 °F
- Altimeter
- 30.17 inHg
- Observed at
- MPV, 12 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.