# NTSB SEA87LA151: Rockwell S-2R, N4229X, Plymouth, WA, July 31, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 31, 1987, 13:00 local (20:00 UTC)
- Place: Plymouth, WA
- Coordinates: 46.210063, -119.1604 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.2101&lon=-119.1604&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 25, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 40666
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA87LA151
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40666/pdf
- Page: https://openairdocs.org/ntsb/SEA87LA151

## Analysis

DRG A SWATH RUN, A TOTAL LOSS OF POWER OCCURRED WHEN THE ENG'S #9 CYLINDER FAILED. THE PLT MADE A FORCED LNDG IN A SOFT POTATO FIELD, BUT THE ACFT NOSED OVER AFTER IT SLOWED TO ABOUT 20 KTS.

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, maneuvering - aerial application
  - engine assembly,cylinder - failure,total (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - soft (contributing factor)
  - terrain condition - crop (contributing factor)

## Aircraft

- Registration: [N4229X](https://openairdocs.org/deregistered/N4229X-2004-05-20), registration cancelled 2004-05-20, S/N 1995R, built 1974 (OpenAirDocs)
- Reported make and model: Rockwell S-2R
- Registry model: [Rockwell International S-2R](https://openairdocs.org/model/rockwell-international-s-2r) (registry code 7630202) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1995R
- Airframe hours: 4000
- Engines: P&W R-1340-AN-1 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Farmboy Spray Co. Inc.
- Registered owner: Farmboy Spray Co., Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Departed: KENNEWICK, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 12,000 total, 12,000 as pilot in command, 155 in the last 90 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 75 °F
- Altimeter: 29.00 inHg

## 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 19870731081039A](https://openairdocs.org/incident/19870731081039A), Jul 31, 1987: Ayres S2RRESTD, Kennewick, WA, Substantial damage. Engine lost power on a spray run due to a broken cylinder. Aircraft nosed over in a potato field.

## Other investigations on N4229X (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 SEA76FYC48](https://openairdocs.org/ntsb/SEA76FYC48), May 6, 1976: Aero Comdr 600S2R (N4229X), Hermiston, OR, 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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