# NTSB SEA91LA150: Cessna T188C, N2070J, Riverton, WY, July 4, 1991

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 3, 1991, 21:00 local (Jul 4, 1991, 03:00 UTC)
- Place: Riverton, WY
- Coordinates: 43.030883, -108.410881 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.0309&lon=-108.4109&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report May 5, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41465
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA150
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41465/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA150

## Probable cause

THE PILOT DID NOT MAINTAIN ADEQUATE TERRAIN CLEARANCE.  A FACTOR TO THE ACCIDENT WAS:  POOR INFLIGHT PLANNING/PREPARATION.

## Sequence of events

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

- In flight collision with terrain/water, maneuvering - aerial application
  - clearance - not maintained, pilot in command (cause)
  - in-flight planning/decision - poor, pilot in command (contributing factor)
- Nose over, landing - roll

## Analysis

DURING AN AERIAL APPLICATION FLIGHT, THE AIRPLANE STRUCK RISING TERRAIN IN THE VICINITY OF THE FIELD THAT WAS BEING SPRAYED AT THE TIME.

## Aircraft

- Registration: [N2070J](https://openairdocs.org/deregistered/N2070J-1993-01-14), registration cancelled 1993-01-14, S/N T18803360T (OpenAirDocs)
- Reported make and model: CESSNA T188C
- Registry model: [Cessna T188C](https://openairdocs.org/model/cessna-t188c) (registry code 2073012) (OpenAirDocs)
- Category: Airplane
- Serial number: T18803360T
- Engines: CONTINENTAL TSIO-520-T 310 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Dakota Ag Service, doing business as Wind River Ag
- Registered owner: Dakota Ag Service
- Departed: RIVERTON, WY

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; flight hours: 2,858 total, 1,800 in this make and model, 2,766 as pilot in command, 154 in the last 90 days, 83 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: calm
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °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 19910703025779A](https://openairdocs.org/incident/19910703025779A), Jul 3, 1991: Cessna T188C, Riverton, WY, Substantial damage. Made procedure turn around too close to a rock butte. Unable to clear,dumped load. Tail hit, aircraft nosed over.

## Other investigations on N2070J (2)

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 DEN83LA190](https://openairdocs.org/ntsb/DEN83LA190), Aug 13, 1983: Cessna T188L (N2070J), Wahpeton, ND, substantial damage
- [NTSB MKC79DER57](https://openairdocs.org/ntsb/MKC79DER57-134213), Jul 24, 1979: Cessna 188T (N2070J), Belview, MN, 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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