# NTSB MKC88LA141: Rockwell S2R, N3665X, O'Kean, AR, July 28, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 28, 1988, 09:00 local (14:00 UTC)
- Place: O'Kean, AR
- Coordinates: 36.160274, -90.809883 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.1603&lon=-90.8099&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 11, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 34616
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC88LA141
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34616/pdf
- Page: https://openairdocs.org/ntsb/MKC88LA141

## Sequence of events

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

- Loss of engine power, maneuvering - aerial application
  - fluid,fuel - starvation (cause)
  - fluid,fuel grade - improper (contributing factor)
  - fuel system - overtemperature (contributing factor)
  - preflight planning/preparation - improper, pilot in command (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing
  - terrain condition - none suitable (contributing factor)

## Analysis

WHILE PERFORMING AN AERIAL APPLICATION OPERATION, THE PLT SAID HE EXPERIENCED A TOTAL POWERPLANT FAILURE. HE ATTEMPTED AN EMERGENCY LDG IN A CULTIVATED RICE FIELD. DURING THE LDG ATTEMPT, THE AIRCRAFT SUSTAINED SUBSTANTIAL DAMAGE TO THE PROPELLER, LANDING GEAR AND WING. AUTOMOTIVE FUEL WAS BEING USED. AN FAA STUDY PREDICTS VAPOR LOCK DURING HIGH OUTSIDE TEMPS, HIGH VOLATILITY (AUTO GAS), AND HIGH ENGINE TEMPS.

## Aircraft

- Registration: [N3665X](https://openairdocs.org/deregistered/N3665X-2005-10-26), registration cancelled 2005-10-26, S/N 1892R, built 1974 (OpenAirDocs)
- Reported make and model: ROCKWELL S2R
- Registry model: [Aero Commander S2R](https://openairdocs.org/model/aero-commander-s2r) (registry code 0143022) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1892R
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Archer Flying Service
- Registered owner: Archer, Jerry L
- Airworthiness certificate: Special, Restricted (Special)
- Departed: M70, POCAHONTAS, AR
- Airport: NONE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 10,000 total, 2,000 in this make and model, 400 in the last 90 days, 150 in the last 30 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 81 °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 19880728039109A](https://openairdocs.org/incident/19880728039109A), Jul 28, 1988: Ayres S2RRESTD, Okean, AR, Substantial damage. Engine quit during a spray operation. Force landed in a rice field.

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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