# NTSB DEN86LA205: Schweizer G164A, N8379, Grandin, ND, July 24, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 24, 1986, 11:30 local (16:30 UTC)
- Place: Grandin, ND
- Coordinates: 47.229423, -97.000465 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.2294&lon=-97.0005&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 17019
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN86LA205
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17019/pdf
- Page: https://openairdocs.org/ntsb/DEN86LA205

## Sequence of events

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

- On ground/water collision with object, takeoff - roll/run
  - airport facilities,runway/landing area condition - high vegetation (contributing factor)
  - judgment - poor, pilot in command (contributing factor)
  - airport facilities,runway/landing area condition - soft (contributing factor)
  - directional control - not maintained, pilot in command (cause)
  - airport facilities,runway/landing area condition - wet (contributing factor)
- On ground/water encounter with terrain/water, takeoff - roll/run
  - terrain condition - ground (contributing factor)
- Nose over, takeoff - roll/run

## Analysis

PLT WAS ATTEMPTING TO TAKE OFF FROM 2600 FT X 50 FT SOD STRIP WITH FULL FUEL (36 GAL) AND 160 GAL OF M22, A FUNGICIDE. CENTER OF RWY WAS SOFT FROM RECENT RAINS. PLT BEGAN TAKEOFF ROLL ON RIGHT SIDE OF RWY. RIGHT WING AND SPRAY BOOM CONTACTED TALL GRAIN STALKS ALONG SIDE OF RWY AND ACFT SPUN AROUND AND SKIDDED SIDEWAYS. LEFT WING TIP DUG INTO GROUND AND ACFT CARTWHEELED.

## Aircraft

- Registration: [N8379](https://openairdocs.org/aircraft/N8379), registered now, S/N 872, built 1971 (OpenAirDocs)
- Reported make and model: SCHWEIZER G164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 872
- Airframe hours: 4802
- Engines: P&W R-985-AN1 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Cameron Wischer, doing business as Wischer Aviation
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Unknown, December 16, 1985
- Airport: Dakota, runway 18, 2,600 × 50 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 1,849 total, 807 in this make and model, 1,753 as pilot in command, 294 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 12 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 68 °F
- Altimeter: 29.00 inHg
- Observed at: FAR, 21 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 19860724035729A](https://openairdocs.org/incident/19860724035729A), Jul 24, 1986: Scwzer G164A, Grandin, ND, Substantial damage. Spray boom struck vegetation during takeoff run. Aircraft cartwheeled. Center of runway wet sod.

## Other investigations on N8379 (3)

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 CHI83LA288](https://openairdocs.org/ntsb/CHI83LA288), Jul 1, 1983: Grumman G-164A (N8379), Morris, MN, substantial damage
- [NTSB FTW78DPG75](https://openairdocs.org/ntsb/FTW78DPG75), Aug 12, 1978: Grumman G-164A (N8379), Crawfordsville, AR, substantial damage
- [NTSB FTW74DPG16](https://openairdocs.org/ntsb/FTW74DPG16), Aug 27, 1973: Grumman G-164 (N8379), Clarkedale, AR, substantial damage

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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