Aircraft Accident/Incident Report

Benton, Tennessee 37307
Thursday, March 20, 1997 14:30 EST

NTSB Narrative Summary Released at Completion of Accident

While soaring along a ridge the pilot descended the glider to about 20 feet above the trees. As he made a turn away from the ridge the glider encountered heavy sink and descended. A wing tip caught a tree and the glider spun around and nosed into the trees where it came to rest.

NTSB Probable Cause Narrative

The failure of the pilot to maintain altitude and clearance from the trees on a ridge line.

Event Information

Type of Event Accident
Event Date 3/20/1997
Event Day of the Week Thursday
Time of Event 1430
Event Time Zone Eastern Standard Time
Event City BENTON
Event State TENNESSEE
Event Country --
Zipcode of the event site 37307
Event Date Year 1997
Event Date Month 3
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
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 Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1453 Eastern Standard Time
Direction of event from weather observation facility (degrees) 200
Weather Observation Facility ID CHA
Elevation of weather observation facility 682
Distance of event from weather observation facility (units?) 40
Time Zone of the weather observation EST
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 17
Dew Point at event time (in degress fahrenheit) 6
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Variable
Wind Speed (knots) 0
Wind Velocity Indicator Calm
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 29
Density Altitude (feet) 900
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 93
NTSB Notification Source --
NTSB Notification Date Mar 21 1997 12:00AM
NTSB Notification Time 1435
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 8 2000 12:10PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N33WP
NTSB Number MIA97LA101
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Schweizer
Aircraft Model SGS 1-26E
Aircraft Series Identifier SGS 1-26E
Aircraft Serial Number 638
Certified Max Gross Weight 800
Aircraft Category Glider
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 1
Number of Engines --
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Aug 21 1996 12:00AM
Airframe hours since last inspection 50
Airframe Hours 611
ELT Installed No
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name FRANK R. TROWBRIDGE III
Aircraft Owner Street Address 111 OLD HICKORY BLVD., APT. 36
Aircraft Owner City NASHVILLE
Aircraft Owner State TN
Aircraft Owner Country
Aircraft Owner Zipcode 37221
Operator is an individual? --
Operator Name WENDYLENE, INC.
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address P.O. BOX 132
Operator City BENTON
Operator State TN
Operator Country
Operator Zip code 37307
Operator Code
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
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
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code 92A
Departure City
Departure State
Departure Country
Departure Time 1350
Departure Time Zone EST
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code
Destination City
Destination State
Destination Country
Specific Phase of Flight Maneuvering
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:34AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --