# NTSB MIA88LA258: Air Tractor AT-301A, N73089, Shelby, MS, August 19, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 19, 1988, 10:30 local (15:30 UTC)
- Place: Shelby, MS
- Coordinates: 33.949874, -90.760383 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.9499&lon=-90.7604&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 26, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 32230
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA88LA258
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32230/pdf
- Page: https://openairdocs.org/ntsb/MIA88LA258

## Sequence of events

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

- Main gear collapsed, takeoff - roll/run
  - landing gear,main gear attachment - overload (cause)
  - maintenance,replacement - not performed, company/operator management (cause)
- Loss of control - on ground/water, takeoff - roll/run
- Nose over, takeoff - roll/run

## Analysis

WHILE ON AN AERIAL APPLICATION FLT DURING THE GROUND ROLL TO TAKEOFF, THE FORWARDMOST OF TWO MAIN GEAR CLAMP BLOCK BOLTS OF THE RT MAIN LANDING GEAR FAILED. THE GEAR TRAILED AFT. THE INBOARD MAIN GEAR LARGE BOLT FAILED. THE ACFT TRAVELLED OFF THE RWY INTO A SOY BEAN FIELD AND NOSED OVER. EXAMINATION OF THE BOLTS REVEALED NO EVIDENCE OF PRE-EXISTING FAILURE. ACCORDING TO THE ACFT MAINTENANCE MANUAL BOTH THE FAILED BOLTS SHOULD BE REPLACED AT A MAXIMUM OF 600 HRS & A MINIMUM OF 300 HRS, DEPENDING ON THE GENERAL LANDING FIELD CONDITIONS. ACCORDING TO THE OPERATOR OF THE ACFT, BOTH BOLTS HAD ACCUMULATED APRX 670 HRS SINCE REPLACEMENT.

## Aircraft

- Registration: [N73089](https://openairdocs.org/deregistered/N73089-2009-01-16), registration cancelled 2009-01-16, S/N 301-0634, built 1985 (OpenAirDocs)
- Reported make and model: AIR TRACTOR AT-301A
- 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: 301-0634
- Airframe hours: 2000
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Finley Brunetti, Jr.
- Airworthiness certificate: Special, Restricted (Special)

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 5,000 total, 2,000 in this make and model, 5,000 as pilot in command, 250 in the last 90 days, 100 in the last 30 days, 10 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 90 °F, dew point 73 °F
- Altimeter: 29.00 inHg
- Observed at: GWO, 41 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 19880819034529A](https://openairdocs.org/incident/19880819034529A), Aug 19, 1988: Airtrc AT301, Shelby, MS, Substantial damage. Main landing attach bolts failed on the takeoff roll. Traveled into nearby field and nosed over. Over time limit.

## Other investigations on N73089 (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 MIA89LA157](https://openairdocs.org/ntsb/MIA89LA157), May 26, 1989: Air Tractor AT-301 (N73089), Arcola, MS, substantial damage. Probable cause: THE CIRCUMFERENTIAL ON THE NUMBER 2 CYLINDER WHICH RESULTED IN A LOSS OF ENGINE POWER.

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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