# NTSB SEA90LA099: Briegleb BG-12B, N1696, Wenatchee, WA, June 11, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 10, 1990, 17:30 local (Jun 11, 1990, 00:30 UTC)
- Place: Wenatchee, WA
- Coordinates: 47.369522, -120.350257 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.3695&lon=-120.3503&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 30, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41209
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA90LA099
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41209/pdf
- Page: https://openairdocs.org/ntsb/SEA90LA099

## Probable cause

PILOT'S IMPROPER INFLIGHT PLANNING WHICH RESULTED IN THE AIRCRAFT UNDERSHOOTING THE RUNWAY. FACTORS IN THE ACCIDENT WERE THE HIGH, GUSTY WIND CONDITIONS.

## Sequence of events

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

- Undershoot, approach - vfr pattern - final approach
  - in-flight planning/decision - improper, pilot in command (cause)
  - weather condition - high wind (contributing factor)
  - weather condition - gusts (contributing factor)
- In flight collision with terrain/water, approach - vfr pattern - final approach

## Analysis

THE PILOT FLEW TOO FAR IN A VFR TRAFFIC PATTERN ON THE DOWNWIND LEG TO RETURN TO THE RUNWAY FOR LANDING. THE ACFT UNDERSHOT THE RUNWAY AND IMPACTED TERRAIN OFF THE ARPT.

## Aircraft

- Registration: [N1696](https://openairdocs.org/deregistered/N1696-1991-10-17), registration cancelled 1991-10-17, S/N 169 (OpenAirDocs)
- Reported make and model: BRIEGLEB BG-12B
- Registry model: [Briegleb BG-12B](https://openairdocs.org/model/briegleb-bg-12b) (registry code 79001E4) (OpenAirDocs)
- Category: Glider
- Serial number: 169
- Engines: unknown
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Cascade Soaring Society
- Airport: EAT, Wenatchee, runway 25, 1,100 × 100 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; flight hours: 798 total, 3 in this make and model, 748 as pilot in command, 26 in the last 90 days, 10 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 18 knots, gusting 25
- Visibility: 30 statute miles
- Lowest ceiling: 20,000 ft overcast
- Temperature: 63 °F, dew point 37 °F
- Altimeter: 29.00 inHg
- Observed at: EAT, 1 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 19900610019429A](https://openairdocs.org/incident/19900610019429A), Jun 10, 1990: Amtr BG12B, Wenatchee, WA, Destroyed. Crash landed short of the runway. Misjudged glide in strong surface wind.

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.