# NTSB SEA90LA097: Rockwell S2R, N5620X, Cottonwood, ID, June 6, 1990

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: June 6, 1990, 07:25 local (14:25 UTC)
- Place: Cottonwood, ID
- Coordinates: 45.940952, -116.52082 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.9410&lon=-116.5208&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report October 20, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 41208
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA90LA097
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41208/pdf
- Page: https://openairdocs.org/ntsb/SEA90LA097

## Probable cause

THE LOSS OF ENGINE POWER DUE TO UNDETERMINED REASONS. THE BERM, WHICH THE AIRPLANE STRUCK DURING LANDING, WAS A FACTOR IN THE ACCIDENT.

## Sequence of events

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

- Loss of engine power, maneuvering - aerial application
  - powerplant - undetermined (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - flare/touchdown
  - terrain condition - berm (contributing factor)

## Analysis

THE AGRICULTURAL AIRCRAFT ENCOUNTERED UNSUITABLE TERRAIN AS THE PILOT WAS MAKING A FORCED LANDING AFTER A LOSS OF ENGINE POWER. THE AIRCRAFT STRUCK A 5 TO 6 FOOT HIGH BERM JUST SHORT OF THE SELECTED FIELD, AND WAS TOTALLY DESTROYED BY FIRE AND IMPACT DAMAGE.

## Aircraft

- Registration: [N5620X](https://openairdocs.org/deregistered/N5620X-1990-12-26), registration cancelled 1990-12-26, S/N 1820R (OpenAirDocs)
- Reported make and model: ROCKWELL S2R
- Registry model: [Aero Commander S2R](https://openairdocs.org/model/aero-commander-s2r) (registry code 0143022) (OpenAirDocs)
- Category: Airplane
- Serial number: 1820
- Airframe hours: 4300
- Engines: P&W 1340-AN2 600 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Aerial application, Part 137
- Operator: Prairie Flying Service Inc.
- Registered owner: Prairie Flying Service Inc
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, May 21, 1990, 49 hours before
- Departed: NONE, FENN, ID
- Airport: Private

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 2,600 total, 137 in this make and model, 2,500 as pilot in command, 100 in the last 90 days, 35 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 61 °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 19900606019539A](https://openairdocs.org/incident/19900606019539A), Jun 6, 1990: Ayres S2RR1340REST, Cottonwood, ID, Destroyed. Reported engine failed on turn around from a spray run. Struck a berm crashed and burned landing.

## Other investigations on N5620X (1)

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 SEA89LA048](https://openairdocs.org/ntsb/SEA89LA048), Feb 8, 1989: Aero Commander S2R (N5620X), Cottonwood, ID, substantial damage. Probable cause: THE PILOT MISJUDGING HIS ALTITUDE DUE TO THE WHITE OUT CONDITIONS. CONTRIBUTING TO THE ACCIDENT WAS THE PILOTS LACK OF EXPERIENCE IN THIS AIRCRAFT AND THIS TYPE OF OPERATION.

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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