# NTSB CHI92DET01: Frost Briegleb/BG-12A, N163MF, Lake Village, IN, August 16, 1992

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: August 16, 1992, 12:30 local (18:30 UTC)
- Place: Lake Village, IN
- Coordinates: 41.120716, -87.44979 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.1207&lon=-87.4498&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report July 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15250
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92DET01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15250/pdf
- Page: https://openairdocs.org/ntsb/CHI92DET01

## Probable cause

INADVERTENT STALL AND SPIN WITH INADEQUATE ALTITUDE FOR RECOVERY.

## Sequence of events

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

- Loss of control - in flight, takeoff - initial climb
  - stall/spin - inadvertent, pilot in command (cause)
  - lack of total experience in type of aircraft, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - grass
  - altitude - inadequate (contributing factor)

## Analysis

THE PILOT WAS ON HIS FIRST FLIGHT IN THIS MODEL GLIDER AND THE LAUNCH WAS BY GROUND TOW. THE PILOT STATED THE GLIDER CLIMBED TO 200 FEET AND 50 KNOTS AND WOULDN'T CLIMB OR ACCELERATE ANY MORE. AS HE RELEASED TOW ROPE, HE REALIZED THAT HE HAD ENTERED A SPIN. ALTITUDE WAS NOT SUFFICIENT FOR FULL RECOVERY.

## Aircraft

- Registration: [N163MF](https://openairdocs.org/deregistered/N163MF-2013-01-31), registration cancelled 2013-01-31, S/N 12007, built 1970 (OpenAirDocs)
- Reported make and model: FROST BRIEGLEB/BG-12A (BRIEGLEB/B)
- Registry model: [Briegleb Glider BG-12A](https://openairdocs.org/model/briegleb-glider-bg-12a) (registry code 79001M6) (OpenAirDocs)
- Registry engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000, none) (OpenAirDocs)
- Category: Glider, amateur-built
- Serial number: 12007
- Airframe hours: 41
- Engines: unknown
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Kortokrax, Kristian Kevin
- Registered owner: Mussman, Craig L
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, July 7, 1992
- Airport: C98, Lake Village, In, runway 36, 2,480 × 150 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 856 total, 782 as pilot in command, 48 in the last 90 days, 12 in the last 30 days, 1.2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 10° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: 3,500 ft
- Temperature: 81 °F, dew point -0 °F
- Altimeter: 30.00 inHg
- Observed at: GYY, 29 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 19920816031559A](https://openairdocs.org/incident/19920816031559A), Aug 16, 1992: Amtr BG12B, Lake Village, IN, Substantial damage. Too slow on auto tow climb. Cut loose but stalled and spun to ground. First flight in type high performance glider.

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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