# NTSB FTW89DPJ03: Air Tractor 301, N4369S, Jefferson, OK, April 7, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: April 7, 1989, 08:30 local (13:30 UTC)
- Place: Jefferson, OK
- Location: 36.7203° N, 97.7909° W: Placed by OpenAirDocs: center of Jefferson, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.7203&lon=-97.7909&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 10, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 22697
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW89DPJ03
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22697/pdf
- Page: https://openairdocs.org/ntsb/FTW89DPJ03

## Probable cause

LOSS OF ENGINE POWER, DUE TO A CRACKED NUMBER 4 CYLINDER.  A FACTOR RELATED TO THE ACCIDENT WAS: THE TERRACE (DIRT BANK) IN THE EMERGENCY LANDING AREA.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application
  - engine assembly,cylinder - cracked (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - dirt bank/rising embankment (contributing factor)
- Nose over, landing - roll

## Analysis

THE AG AIRPLANE WAS ON A SPRAYING FLIGHT, WHEN THE NUMBER FOUR CYLINDER CRACKED & THE ENGINE LOST POWER.  DURING A SUBSEQUENT EMERGENCY LANDING, THE AIRPLANE ROLLED ABOUT 450 FT, HIT A TERRACE & NOSED OVER.

## Aircraft

- Registration: [N4369S](https://openairdocs.org/deregistered/N4369S-2002-04-26), registration cancelled 2002-04-26, S/N 301-0049, built 1976 (OpenAirDocs)
- Reported make and model: AIR TRACTOR 301
- Registry model: [Air Tractor AT-301](https://openairdocs.org/model/air-tractor-at-301) (registry code 0390103) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 301-0049
- Airframe hours: 3600
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Kirk, David T., doing business as Homestead Farms Flying
- Registered owner: Homestead Forms Flying Service
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, February 28, 1989, 61 hours before
- Departed: OK72, POND CREEK, OK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 10,703 total, 4,700 in this make and model, 10,030 as pilot in command, 621 in the last 90 days, 220 in the last 30 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: 25,000 ft overcast
- Temperature: 45 °F, dew point 39 °F
- Altimeter: 30.00 inHg
- Observed at: PNC, 35 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 19890407007629A](https://openairdocs.org/incident/19890407007629A), Apr 7, 1989: Airtrc AT301, Jefferson, OK, Substantial damage. Engine failed on a spray run. Flipped over on landing when spray rig caught a terrace. Engine cylinder had failed.

## Other investigations on N4369S (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 FTW83LA394](https://openairdocs.org/ntsb/FTW83LA394), Aug 25, 1983: Air Tractor AT301 (N4369S), El Campo, TX, 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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