# NTSB FTW94LA164: Aero Commander S2R, N4080X, Monticello, AR, May 17, 1994

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 17, 1994, 18:30 local (23:30 UTC)
- Place: Monticello, AR
- Coordinates: 33.619476, -91.790145 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.6195&lon=-91.7901&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 14, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 19060
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW94LA164
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/19060/pdf
- Page: https://openairdocs.org/ntsb/FTW94LA164

## Probable cause

THE LOSS OF ENGINE POWER DUE TO THE NUMBER 2 CYLINDER CRACKING. A FACTOR WAS THE LACK OF SUITABLE TERRAIN FOR THE FORCED LANDING.

## 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 - cracked (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing
  - terrain condition - none suitable (contributing factor)
  - terrain condition - wet

## Analysis

THE AERIAL APPLICATION PILOT WAS MAKING A SWATH RUN 15 FEET ABOVE THE FIELD WHEN THE ENGINE LOST POWER, AND HE MADE A FORCED LANDING TO A WET FIELD.  THE AIRPLANE SLID 75 FEET, STRUCTURALLY DAMAGING THE HOPPER AND RIGHT WING SPAR. ACCORDING TO THE OPERATOR THE NUMBER 2 CYLINDER WAS CRACKED.

## Factual narrative

On May 17, 1994, at 1830 central daylight time, an Aero Commander S2R, N4080X, was substantially damaged during a forced landing near Monticello, Arkansas.  The commercial pilot was not injured. Visual meteorological conditions prevailed for the local aerial application flight.

The pilot reported to a Federal Aviation Administration (FAA) inspector, that during a swath run at 15 feet above the field, the engine lost power, and he made a forced landing.  The field was wet and the airplane slid 75 feet.  The hopper and right wing spar were structurally damaged.

According to the information provided by the operator, the number 2 cylinder was cracked from the front spark plug to the rear spark plug.

## Aircraft

- Registration: [N4080X](https://openairdocs.org/deregistered/N4080X-2007-11-30), registration cancelled 2007-11-30, S/N 1917R, built 1974 (OpenAirDocs)
- Reported make and model: AERO COMMANDER 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: 1917R
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: David B. Haynes
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, January 1, 1994
- Departed: NONE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 6,000 total, 5,000 in this make and model, 5,600 as pilot in command, 200 in the last 90 days, 50 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 20° at 9 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 48 °F
- Altimeter: 30.00 inHg
- Observed at: PBF, 37 nm away

## 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 19940517011379A](https://openairdocs.org/incident/19940517011379A), May 17, 1994: Ayres S2R, Monticello, AR, Substantial damage. Lost power on swath run. Landed in wet field,slid 75FT. Damage dhopper and wing spar. NR2 cylinder cracked.

## Other investigations on N4080X (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 MKC88LA122](https://openairdocs.org/ntsb/MKC88LA122), Jul 23, 1988: Rockwell S2R (N4080X), Brinkley, AR, 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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