# NTSB MIA92LA179: Air Tractor AT-301, N4333S, Satartia, MS, September 10, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 10, 1992, 18:30 local (23:30 UTC)
- Place: Satartia, MS
- Coordinates: 32.620544, -90.630599 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.6205&lon=-90.6306&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 33133
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA92LA179
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33133/pdf
- Page: https://openairdocs.org/ntsb/MIA92LA179

## Probable cause

FAILURE OF THE BRAKE SYSTEM DUE TO INSTALLATION OF A BOGUS PART BY AN UNKNOWN PERSON.  DIRECTIONAL CONTROL BY THE PILOT IN COMMAND WAS NOT POSSIBLE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing - roll
  - landing gear,normal brake system - unapproved part (cause)
  - maintenance,modification - improper, unknown (cause)
- Loss of control - on ground/water, landing - roll
  - directional control - not possible, pilot in command
- On ground/water collision with object, landing - roll
  - object - pole

## Analysis

DURING THE LANDING ROLL WITH THE BRAKES APPLIED, THE ACFT VEERED OFF THE LT SIDE OF THE GRASS AIRSTRIP & COLLIDED WITH A TELEPHONE POLE.  EXAM OF THE ACFT REVEALED THAT THE RT BRAKE LINE WHICH WAS ATTACHED TO THE PARKING BRAKE ASSY WAS SEPARATED.  EXAM OF THE LINE REVEALED THAT A BOGUS PART WAS INSTALLED RESULTING IN THE SEPARATION.  NO DETERMINATION COULD BE MADE WHO PERFORMED THE IMPROPER REPAIR.

## Aircraft

- Registration: [N4333S](https://openairdocs.org/deregistered/N4333S-2019-03-02), registration cancelled 2019-03-02, S/N 301-0012, built 1975 (OpenAirDocs)
- Reported make and model: Air Tractor AT-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: 301-0012
- Airframe hours: 6059
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Lungrin, Charles V., doing business as Lungrin Flying Service, Inc.
- Registered owner: Lungrin, Charles V.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, July 1, 1992, 349 hours before
- Departed: NONE
- Airport: NONE, Unknown, runway 15, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: single-engine land, multi-engine land; medical: class 2, valid medical--w/ waivers/lim; flight hours: 3,128 total, 400 in this make and model, 3,068 as pilot in command, 400 in the last 90 days, 150 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 81 °F
- Altimeter: 30.00 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 19920910039179A](https://openairdocs.org/incident/19920910039179A), Sep 10, 1992: Airtrc AT301, Satartia, MS, Substantial damage. Lost right brake on landing. Veered off runway. Wing hit pole. Right brake line separated. Incorrect fitting used.

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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