# NTSB CHI92FA170: Gates Learjet 25B, N38DJ, Sheboygan Falls, WI, June 12, 1992

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: June 12, 1992, 12:10 local (17:10 UTC)
- Place: Sheboygan Falls, WI
- Coordinates: 43.719573, -87.819961 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.7196&lon=-87.8200&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report August 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15293
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92FA170
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15293/pdf
- Page: https://openairdocs.org/ntsb/CHI92FA170

## Probable cause

THE COPILOT'S PREMATURE LIFTOFF AND THE CAPTAIN'S INADEQUATE REMEDIAL ACTION RESULTING IN LOSS OF AIRCRAFT CONTROL AT LOW ALTITUDE.

## Sequence of events

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

- Loss of control - in flight, takeoff
  - lift-off - premature, copilot/second pilot (cause)
  - remedial action - inadequate, pilot in command (cause)
  - climb - not attained, unknown
  - stall - inadvertent, unknown
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - runway

## Analysis

THE CREW DISCUSSED TOUCH-AND-GO LANDINGS AS THEY WALKED OUT TO BOARD.  THE CAPTAIN OCCUPIED THE RIGHT SEAT TO ALLOW THE COPILOT TO FLY THE SHORT REPOSITIONING FLIGHT FROM THE LEFT.  THE AIRPLANE LIFTED OFF PREMATURELY AND REMAINED IN GROUND EFFECT.  ROLL ATTITUDE VACILLATED SLIGHTLY BEFORE ONSET OF A RAPID RIGHT ROLL TO INVERTED AT GROUND IMPACT. THE ENGINES CONTINUED TO RUN AFTER IMPACT; BOTH WERE SELECTED TO HIGH POWER.  NO MATERIAL OR MECHANICAL DISCREPANCY WAS FOUND WHICH DIMINSHED POWER OR AIRCRAFT CONTROL.

## Aircraft

- Registration: [N38DJ](https://openairdocs.org/deregistered/N38DJ-1996-02-21), registration cancelled 1996-02-21, S/N 191 (OpenAirDocs)
- Reported make and model: GATES LEARJET 25B
- Registry model: [Gates Lear Jet 25B](https://openairdocs.org/model/gates-lear-jet-25b) (registry code 5170511) (OpenAirDocs)
- Category: Airplane
- Serial number: 191
- Airframe hours: 9798
- Engines: GE CJ 610-6 2950 lbs thrust turbo jet
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Jet Charter Group, Inc., doing business as Professional Ambulance Service
- Registered owner: Jet Charter Group, Inc.
- Airworthiness certificate: Standard, Transport
- Last inspection: AAIP, June 5, 1992, 7 hours before
- Departed: SBM
- Destination: MTW, MANITOWOC, WI
- Airport: SBM, Sheboygan County Muni, runway 21, 5,400 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; military, commercial, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; toxicology performed; flight hours: 17,012 total, 5,738 in this make and model, 15,183 as pilot in command, 79 in the last 90 days, 28 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 55 °F
- Altimeter: 29.00 inHg
- Observed at: MTW, 26 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 19920612019879A](https://openairdocs.org/incident/19920612019879A), Jun 12, 1992: Lear 25B, Sheboygan, WI, Destroyed, 2 fatal. Rolled on premature takeoff. Dragged wing flipped over. Indicates pilot gave sec an engine out below VMC.

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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