Aircraft Accident/Incident Report

Seaside, Oregon 97138
Saturday, May 6, 2000 15:00 PDT

NTSB Narrative Summary Released at Completion of Accident

While en route on the west side of Oregon's Coastal Range, the glider pilot reached a point where he felt he could not be assured of successfully continuing on his planned route. He therefore turned toward Seaside, Oregon, hoping to land at the Seaside Airport. But soon after making the turn, the aircraft encountered significant sink. Once the pilot realized that he was not going to make it to the airport, he started looking for a safe place to land out, but he was not able to find one. When he was about three miles from the airport, he determined he could not proceed much further, so he elected to make a forced landing in a group of small deciduous trees. Although he was not injured, the aircraft sustained substantial damage when it collided with the trees.

NTSB Probable Cause Narrative

The pilot's improper decision to continue to a point where he could not be assured of reaching a safe landing-out site if he encountered an area of significant sink after departing his planned route of flight. Factors include downdrafts, terrain that contained no suitable landing sites, and trees at the location where the pilot found it necessary to execute a forced landing.

Event Information

Type of Event Accident
Event Date 5/6/2000
Event Day of the Week Saturday
Time of Event 1500
Event Time Zone Pacific Daylight Time
Event City SEASIDE
Event State OREGON
Event Country --
Zipcode of the event site 97138
Event Date Year 2000
Event Date Month 5
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 Pilot
Time of the weather observation 0
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 4500
Sky/Lowest/Cloud Conditions Scattered
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) 13
Dew Point at event time (in degress fahrenheit) 1
Wind Direction (degrees magnetic) 270
Variable Wind Indicator Unknown
Wind Speed (knots) 7
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
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) 768
NTSB Notification Source FAA FSDO
NTSB Notification Date May 14 2000 12:00AM
NTSB Notification Time 1500
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record May 11 2001 4:06AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N34173
NTSB Number SEA00LA085
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 1-35
Aircraft Series Identifier SGS 1-35
Aircraft Serial Number 12
Certified Max Gross Weight 930
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 May 1 1999 12:00AM
Airframe hours since last inspection 146
Airframe Hours 2217
ELT Installed No
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name LARRY W. OBERHOLTZER
Aircraft Owner Street Address P.O. BOX 3152
Aircraft Owner City HILLSBORO
Aircraft Owner State OR
Aircraft Owner Country
Aircraft Owner Zipcode 97123
Operator is an individual? --
Operator Name
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address
Operator City
Operator State
Operator Country
Operator Zip code
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 No
Departure Airport Code MMV
Departure City MCMINNVILLE
Departure State OR
Departure Country
Departure Time 1100
Departure Time Zone PDT
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 --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record May 11 2001 4:06AM
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 --