# NTSB CHI91LA188: Schweizer SGS 1-34, N7634, Highland, IL, June 12, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 11, 1991, 19:00 local (Jun 12, 1991, 00:00 UTC)
- Place: Highland, IL
- Coordinates: 38.729938, -89.690231 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.7299&lon=-89.6902&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 14, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 15093
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI91LA188
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15093/pdf
- Page: https://openairdocs.org/ntsb/CHI91LA188

## Probable cause

THE PILOT MISJUDGED HIS TOUCHDOWN POINT.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Undershoot, approach - vfr pattern - final approach
  - proper touchdown point - not attained, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - berm

## Analysis

THE PILOT WAS MAKING AN APPROACH TO A RUNWAY ON WHICH ANOTHER GLIDER HAD LANDED & HAD STOPPED ABOUT 1/4 OF THE WAY DOWN THE RUNWAY. THE PILOT TRIED TO LAND BEHIND THE OTHER GLIDER BUT LANDED SHORT OF THE RUNWAY AND HIT A DIRT MOUND.

## Aircraft

- Registration: [N7634](https://openairdocs.org/aircraft/N7634), registered now, S/N 14, built 1970 (OpenAirDocs)
- Reported make and model: SCHWEIZER SGS 1-34
- Registry model: [Schweizer SGS 1-34](https://openairdocs.org/model/schweizer-sgs-1-34) (registry code 8050146) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider
- Serial number: 14
- Engines: unknown
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: St. Louis Soaring Assn, Inc.
- Airworthiness certificate: Standard, Normal
- Airport: H07, Highland-Winet, runway 18, 2,250 × 270 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; private; medical: unknown; flight hours: 53 total, 7 in this make and model, 32 as pilot in command, 25 in the last 90 days, 4 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 8 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 64 °F
- Altimeter: 29.00 inHg
- Observed at: BLV, 17 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 (OpenAirDocs).

- [Accident 19910611021759A](https://openairdocs.org/incident/19910611021759A), Jun 11, 1991: Scwzer SGS134, Highland, IL, Substantial damage. Tried to land short due to another glider on runway. Struck dirt berm short of runway.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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