# NTSB ATL90DKG05: Ayres Bull Thrush, N4025Q, Americus, GA, August 4, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 4, 1990, 09:30 local (13:30 UTC)
- Place: Americus, GA
- Coordinates: 31.899969, -84.250061 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=31.9000&lon=-84.2501&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 2, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 8082
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL90DKG05
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/8082/pdf
- Page: https://openairdocs.org/ntsb/ATL90DKG05

## Probable cause

FAILURE OF THE ENGINE MAIN OIL LINE WHICH ALLOWED THE ENGINE OIL TO BE IGNITED BY THE HOT ENGINE.

## Sequence of events

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

- Fire, maneuvering - aerial application
  - lubricating system,oil hose - burst (cause)
- Main gear collapsed, landing - roll

## Analysis

THE PILOT REPORTED THAT DURING THE SECOND SPRAY OPERATION OF THE MORNING HE SMELLED RUBBER BURNING. THE AIRPLANE WAS DIVERTED TO A NEAR BY FIELD AND LANDED. THE RIGHT MAIN LANDING GEAR COLLAPSED JUST PRIOR TO STOPPING THE AIRPLANE. GROUND FIRE DEMOLISHED THE AIRPLANE. AN FAA INSPECTOR STATED THAT THE MAIN OIL LINE APPARENTLY SPLIT AND SPILLED OIL ON THE ENGINE WHICH IGNITED. THE ENGINE HAD 250 HOURS SINCE ITS LAST INSPECTION.

## Aircraft

- Registration: [N4025Q](https://openairdocs.org/deregistered/N4025Q-2012-11-15), registration cancelled 2012-11-15, S/N R1820-019DC, built 1981 (OpenAirDocs)
- Reported make and model: Ayres BULL THRUSH (BULL THRUS)
- Registry model: [Ayres S2R-R1820](https://openairdocs.org/model/ayres-s2r-r1820) (registry code 0970215) (OpenAirDocs)
- Registry engine: [Wright R-1820 series](https://openairdocs.org/engine/wright-r-1820-series) (registry code 67020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: R1820-019DC
- Engines: Curtis Wright 1820-97 1200 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Aerial application, Part 137
- Registered owner: Childers Flying Service
- Last inspection: Annual, March 20, 1990, 250 hours before
- Airport: Jones Private

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 4,196 total, 250 in this make and model, 4,113 as pilot in command, 200 in the last 90 days, 100 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 3 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 55 °F
- Altimeter: 29.00 inHg

## 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 19900804033729A](https://openairdocs.org/incident/19900804033729A), Aug 4, 1990: Ayres S2RR1820, Americus, GA, Destroyed. Smelled burning rubber on spray run,returned to base. Fire erupted landing. Rubber oil line burst,leaked on exhaust

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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