# NTSB CHI84LA188: Ayres S2R, N4006U, Vincennes, IN, May 13, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 12, 1984, 18:30 local (May 13, 1984, 00:30 UTC)
- Place: Vincennes, IN
- Coordinates: 38.670639, -87.510398 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.6706&lon=-87.5104&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12610
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LA188
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12610/pdf
- Page: https://openairdocs.org/ntsb/CHI84LA188

## Sequence of events

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

- In flight collision with terrain/water, takeoff - initial climb
  - preflight planning/preparation - improper, pilot in command (cause)
  - load jettison - initiated, pilot in command
  - terrain condition - ditch (contributing factor)
  - lift-off - initiated, pilot in command
  - airspeed - inadequate, pilot in command
  - stall/mush - inadvertent, pilot in command
  - terrain condition - crop (contributing factor)

## Analysis

THE PLT HAD FLOWN 12 SIMILAR LOADS FROM THE 2600 FT RWY THAT SAME DAY. HE STATED THAT ALTHOUGH THERE WAS NOTHING MECHANICALLY WRONG WITH THE ACFT, IT WOULD NOT ACCELERATE PROPERLY DURING THE LAST TAKEOFF ROLL. AFTER APRX 2000 FT OF GROUND ROLL, HE DUMPED A PORTION OF HIS LOAD (FERTILIZER) TO CLEAR A DITCH AT THE DEPARTURE END. THE ACFT LIFTED OFF & CLEARED THE DITCH, BUT IT THEN SETTLED. THE SPRAY BOOM CAUGHT THE WHEAT & SPUN THE ACFT AROUND 180 DEG & IT CRASHED. THE PLT ESTIMATED THE ACFT WAS ABOUT 60 LBS BELOW ITS MAX GROSS WT WHEN THE ACCIDENT OCCURRED.

## Aircraft

- Registration: [N4006U](https://openairdocs.org/deregistered/N4006U-2007-08-10), registration cancelled 2007-08-10, S/N 2500R, built 1978 (OpenAirDocs)
- Reported make and model: AYRES S2R
- Registry model: [Ayres S-2R](https://openairdocs.org/model/ayres-s-2r) (registry code 0970101) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 2500
- Airframe hours: 2150
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Euding Flying Service
- Registered owner: Douglas I. Larson
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, March 1, 1984, 50 hours before
- Airport: IN57, Ueding, runway 36, 2,600 × 150 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 8,000 total, 2,150 in this make and model, 7,750 as pilot in command, 165 in the last 90 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 315° at 4 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 70 °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 19840512016929A](https://openairdocs.org/incident/19840512016929A), May 12, 1984: Ayres S2RRESTD, Vincennes, IN, Substantial damage. Unable to accelerate on takeoff. Dumped load and aborted. Lifted to avoid a ditch. Ground looped in a wheat 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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