# NTSB MIA91LA163: Air Tractor 301, N2361C, Greenville, MS, June 14, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 14, 1991, 15:30 local (20:30 UTC)
- Place: Greenville, MS
- Coordinates: 33.380256, -91.050865 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.3803&lon=-91.0509&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 13, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 32884
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA91LA163
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32884/pdf
- Page: https://openairdocs.org/ntsb/MIA91LA163

## Probable cause

LOSS OF ENGINE POWER DUE TO A CRACKED CYLINDER AND THE PILOT'S INADVERTENT STALL.

## 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 (contributing factor)
- Loss of control - in flight, descent - emergency
  - stall/mush - inadvertent, pilot in command (cause)
- Hard landing, landing - flare/touchdown
- Nose over, landing - flare/touchdown

## Analysis

DURING A SPRAY PASS THE NO. 1 CYL CRACKED ACROSS THE TOP FROM ONE SPARK PLUG HOLE TO THE OTHER. THE ENG SUBSEQUENTLY QUIT. WHILE ATTEMPTING TO CLEAR TREES, THE ACFT STALLED, LANDED HARD IN A FIELD, THEN CAME TO REST INVERTED. THE ENG WAS OVERHAULED 1,050 HRS EARLIER.

## Aircraft

- Registration: N2361C (not matched to a registry record)
- Reported make and model: AIR TRACTOR 301
- Category: Airplane
- Serial number: 301-0399
- Airframe hours: 3260
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Clark,Don, doing business as Clark Flying Service
- Registered owner: Clark,Don
- Last inspection: Annual, December 23, 1990, 200 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 7,519 total, 1,660 in this make and model, 7,479 as pilot in command, 200 in the last 90 days, 150 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 84 °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 19910614021929A](https://openairdocs.org/incident/19910614021929A), Jun 14, 1991: Airtrc AT301, Greenville, MS, Substantial damage. Blew a cylinder during a spray run. Flipped inverted on forced landing. NR1 cylinder cracked between spark plugs.

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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