# NTSB MKC90LA061: Rockwell S-2R, N8522V, Monette, AR, March 6, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 6, 1990, 14:30 local (20:30 UTC)
- Place: Monette, AR
- Coordinates: 35.889095, -90.339569 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.8891&lon=-90.3396&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 21, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 34938
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC90LA061
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34938/pdf
- Page: https://openairdocs.org/ntsb/MKC90LA061

## Probable cause

FAILURE OF THE ENGINE EXHAUST VALVE.

## 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
- Forced landing, descent - emergency
- In flight collision with terrain/water, descent - emergency

## Analysis

WHILE CONDUCTING AN AERIAL APPLICATION OPERATION, THE COMMERCIAL PILOT SAID THAT THE ENGINE FAILED. AN EMERGENCY LANDING WAS ATTEMPTED IN A SOFT, MUDDY COTTON FIELD WHICH RESULTED IN SUBSTANTIAL DAMAGE TO THE ACFT. POST ACCIDENT INVESTIGATION REVEALED A FAILED EXHAUST VALVE ON NO. 8 CYLINDER.

## Aircraft

- Registration: N8522V (not matched to a registry record)
- Reported make and model: Rockwell S-2R
- Category: Airplane
- Serial number: 2282R
- Airframe hours: 5475
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Whited Flying Service
- Registered owner: Whited, Roy M
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 29, 1989, 406 hours before
- Departed: NONE, MONETTE, AR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 7,686 total, 5,140 in this make and model, 7,426 as pilot in command, 60 in the last 90 days, 40 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 8 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 55 °F, dew point -0 °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 19900306004199A](https://openairdocs.org/incident/19900306004199A), Mar 6, 1990: Ayres S2RR1340REST, Monette, AR, Substantial damage. An exhaust valve NR8 cylinder failed during spray run. Crash landed in soft 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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