# NTSB MKC89LA119: Rockwell Thrush S2R, N4900X, Carlisle, AR, May 30, 1989

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: May 30, 1989, 13:45 local (18:45 UTC)
- Place: Carlisle, AR
- Coordinates: 34.780628, -91.740653 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.7806&lon=-91.7407&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report May 22, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 34796
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC89LA119
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34796/pdf
- Page: https://openairdocs.org/ntsb/MKC89LA119

## Probable cause

THE ENGINE FAILED DUE TO A CRACKED CYLINDER AND THE PILOT WAS FORCED TO ATTEMPT A LANDING IN A RICE FIELD WHERE THE GEAR COLLAPSED.

## 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, takeoff - roll/run
  - engine assembly,cylinder - cracked (cause)
  - load jettison - attempted, pilot in command
- Forced landing, descent - emergency
- Main gear collapsed, landing - flare/touchdown
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE PILOT STATED THAT SHORTLY AFTER TAKEOFF THE ENGINE QUIT.THE PILOT ATTEMPTED TO DUMP THE LOAD HE HAD ONBOARD AND ATTEMPTED AN EMERGENCY LANDING IN A RICE FIELD. DURING THE FORCED LANDING THE MAIN GEAR COLLAPSED AND THE HOPPER AND BOTH WINGS WERE DAMAGED. EXAMINATION OF THE ENGINE REVEALED THAT THE NUMBER 9 CYLINDER HAD CRACKED.

## Aircraft

- Registration: [N4900X](https://openairdocs.org/deregistered/N4900X-1990-02-13), registration cancelled 1990-02-13, S/N 2086R (OpenAirDocs)
- Reported make and model: ROCKWELL THRUSH S2R
- Registry model: [Rockwell International S-2R](https://openairdocs.org/model/rockwell-international-s-2r) (registry code 7630202) (OpenAirDocs)
- Category: Airplane
- Engines: P&W R-1340-AN-14B 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Almond Aviation
- Departed: CARLISLE, AR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; commercial; airplane ratings: multi-engine land, single-engine land; medical: unknown, valid medical--w/ waivers/lim; flight hours: 3,064 total, 2,500 in this make and model, 281 in the last 90 days, 100 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 10 knots
- Visibility: 6 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 88 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: LIT

## 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 19890530013439A](https://openairdocs.org/incident/19890530013439A), May 30, 1989: Ayres S2RR1340REST, Carlisle, AR, Substantial damage. Engine failed on climbout. Landed in a rice field causing aircraft damage. Nr 9 cylinder had cracked.

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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