# NTSB SEA86LA081: Air Tractor 301, N5097S, Prescott, WA, March 21, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 20, 1986, 18:00 local (Mar 21, 1986, 02:00 UTC)
- Place: Prescott, WA
- Coordinates: 46.349845, -118.469161 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.3498&lon=-118.4692&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40370
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA081
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40370/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA081

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise
  - landing gear,normal brake system - locked (cause)
- Nose over, landing - roll
- Fire, landing - roll

## Analysis

THE BRAKE LOCKING SYSTEM ENGAGED IN FLIGHT CAUSING THE RIGHT BRAKE TO LOCK. THE AIRCRAFT NOSED OVER ON LANDING WHERE A SMALL FIRE ERUPTED FROM FUEL SPILLAGE ONTO THE HOT ENGINE.

## Aircraft

- Registration: [N5097S](https://openairdocs.org/deregistered/N5097S-2020-08-02), registration cancelled 2020-08-02, S/N 301-0119, built 1978 (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: 301-0119
- Airframe hours: 3450
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Fire: On-Ground
- Flight: Aerial application, Part 137
- Registered owner: Touchet Valley Aviation
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 3, 1986
- Departed: PRESCOTT, WA
- Airport: Prescott Airport

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; flight instructor, commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 10,000 total, 800 in this make and model, 75 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 64 °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 19860320036369A](https://openairdocs.org/incident/19860320036369A), Mar 20, 1986: Airtrc AT301, Prescott, WA, Substantial damage. Right brake lock system inadvertently locked in flight. Ground looped on landing, ended up on nose, fire started.

## Other investigations on N5097S (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 CEN11CA330](https://openairdocs.org/ntsb/CEN11CA330), May 10, 2011: Air Tractor AT-301 (N5097S), Garwood, TX, substantial damage. Probable cause: The pilot's failure to maintain adequate clearance from transmission wires during a low-level maneuvering flight.

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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