# NTSB SEA84LA130: Ayres S2R-1820, N4025K, Pasco, WA, June 12, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 12, 1984, 14:00 local (21:00 UTC)
- Place: Pasco, WA
- Coordinates: 47.439193, -117.350891 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.4392&lon=-117.3509&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39933
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA130
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39933/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA130

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application
  - throttle/power lever - failure,total (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - loose gravel/sandy (contributing factor)

## Analysis

THE PLT WAS APPLYING HERBICIDES TO A CORN FIELD WHEN A POWER LOSS TO IDLE RPM OCCURRED. DURING AN EMERGENCY LANDING, THE MAIN GEAR SUNK INTO SOFT SAND & THE ACFT NOSED OVER. AN EXAM REVEALED THAT THE THROTTLE BRACKET, P/N 19703-5001, HAD FAILED.

## Aircraft

- Registration: N4025K (not matched to a registry record)
- Reported make and model: AYRES S2R-1820
- Category: Airplane
- Serial number: R1820-013DC
- Airframe hours: 476
- Engines: WRIGHT R-1820 1200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Carr Aviation
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, October 18, 1983, 90 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 8,331 total, 68 in this make and model, 8,331 as pilot in command, 148 in the last 90 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 5 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 79 °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 19840612024219A](https://openairdocs.org/incident/19840612024219A), Jun 12, 1984: Ayres S2RR1820, Pasco, WA, Substantial damage. Operator said throttle bracket broken causing power reduction to idle. Aircraft flipped during emergency landing.

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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