# NTSB LAX90DVG18: Glaser-Dirks D6-100G, N132S, Vacaville, CA, August 28, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 28, 1990, 14:00 local (21:00 UTC)
- Place: Vacaville, CA
- Coordinates: 38.40932, -122.009757 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.4093&lon=-122.0098&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 23, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 26584
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX90DVG18
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/26584/pdf
- Page: https://openairdocs.org/ntsb/LAX90DVG18

## Probable cause

THE UNAUTHORIZED ENTRY ONTO THE RUNWAY BY A VEHICLE OPERATOR.

## Sequence of events

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

- On ground/water collision with object, landing - roll
  - airport operations - poor, airport personnel (contributing factor)
  - equipment,other - improper use of, driver of vehicle (cause)

## Analysis

THE PILOT OF THE GLIDER NOTICED A TRACTOR DRIVE ACROSS THE RUNWAY AT THE APPROXIMATE AREA OF THE INTENDED TOUCHDOWN POINT. THE PILOT ALTERED HIS COURSE AND TOUCHED DOWN IN ANOTHER SUITABLE AREA. PRIOR TO STOPPING THE WINGTIP OF THE SAILPLANE CONTACTED THE ROTATING PROPELLER OF A TOWPLANE WHICH WAS STOPPED ON THE SIDE OF THE RUNWAY.

## Aircraft

- Registration: [N132S](https://openairdocs.org/aircraft/N132S), registered now, S/N E186G152 (OpenAirDocs)
- Reported make and model: GLASER-DIRKS D6-100G
- Registry model: [Glaser-Dirks Flugzeugbau DG-100G](https://openairdocs.org/model/glaser-dirks-flugzeugbau-dg-100g) (registry code 3802504) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider
- Serial number: E186G15
- Airframe hours: 810
- Engines: unknown
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Silverado Soaring Inc.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, July 21, 1990, 65 hours before
- Airport: NONE, Vacaville Glider Port, runway 23, 2,200 × 60 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 61; private; seat: center; flight hours: 60 total, 6 in this make and model, 55 as pilot in command, 6 in the last 90 days, 6 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 84 °F

## 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 19900828038719A](https://openairdocs.org/incident/19900828038719A), Aug 28, 1990: Glaser DG100G, Vacaville, CA, Substantial damage. Tractor drove in front of landing sailplane. Pilot altered course and struck rotating prop of towplane.

## Other investigations on N132S (1)

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.

- [NTSB LAX08LA242](https://openairdocs.org/ntsb/LAX08LA242), Jul 23, 2008: Glaser-Dirks Flugzeugbau DG-100G (N132S), Truckee, CA, substantial damage. Probable cause: A malfunction of the tow release mechanism.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.