# NTSB DFW08CA235: Gulfstream-Schweizer A/C Gulfstream, N425LS, Patterson, LA, September 18, 2008 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 18, 2008, 10:00 local (15:00 UTC) - Place: Patterson, LA - Coordinates: 29.723333, -91.309448 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=29.7233&lon=-91.3094&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining event: [Maneuvering: Fuel contamination](https://openairdocs.org/ntsb-events/193) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 3, 2008 - Report: Approved by Office Director - Parties: FAA FSDO - NTSB case key (mKey): 68968 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DFW08CA235 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/68968/pdf - Page: https://openairdocs.org/ntsb/DFW08CA235 ## Probable cause The loss of engine power due to fuel contamination. Contributing to the accident was the unsuitable muddy terrain for the forced landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Fluids: fuel](https://openairdocs.org/ntsb-findings/01071010): Aircraft › Fluids/misc hardware · Fluid condition (probable cause); cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B, 1 case](https://openairdocs.org/ntsb-findings/01071010/cases.md?model=3979904), [All aircraft, 1,695 cases](https://openairdocs.org/ntsb-findings/01071010/cases.md) - [Terrain: wet/muddy terrain](https://openairdocs.org/ntsb-findings/03021035): Environmental issues › Physical environment · Contributed to outcome (probable cause); cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B, 1 case](https://openairdocs.org/ntsb-findings/03021035/cases.md?model=3979904), [All aircraft, 110 cases](https://openairdocs.org/ntsb-findings/03021035/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Maneuvering: Fuel contamination](https://openairdocs.org/ntsb-events/193) (defining event); cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B, 1 case](https://openairdocs.org/ntsb-events/193/sequence.md?model=3979904), [All aircraft, 225 cases](https://openairdocs.org/ntsb-events/193/sequence.md) - [Maneuvering: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342); cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B, 3 cases](https://openairdocs.org/ntsb-events/342/sequence.md?model=3979904), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md) - [Landing-flare/touchdown: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B, 3 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=3979904), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The commercial pilot had refueled and reloaded chemical and departed the airport en route to his third spray mission of the day when the aircraft lost power. The pilot selected an open field next to the cane field that he intended to spray and set up for his forced landing. When the airplane touched down the wheels sank into the mud and nosed over coming to rest inverted. The pilot was uninjured. The airplane sustained substantial damage to the wings and wing struts. The pilot stated in the pilot operator report that water was found in the fuel resupply truck and in the airplane fuel tanks. ## Factual narrative The commercial pilot had refueled and reloaded chemical and departed the airport en route to his third spray mission of the day when the aircraft lost power. The pilot selected an open field next to the cane field that he intended to spray and set up for his forced landing. When the airplane touched down the wheels sank into the mud and nosed over coming to rest inverted. The pilot was uninjured. The airplane sustained substantial damage to the wings and wing struts. The pilot stated in the pilot operator report that water was found in the fuel resupply truck and in the airplane fuel tanks. ## Aircraft - Registration: [N425LS](https://openairdocs.org/aircraft/N425LS), registered now, S/N 598B (OpenAirDocs) - Reported make and model: GULFSTREAM-SCHWEIZER A/C CORP GULFSTREAM - Registry model: [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B](https://openairdocs.org/model/gulfstream-schweizer-a-c-gulfstream-am-g-164b) (registry code 3979904) (OpenAirDocs) - Category: Airplane - Serial number: 598B - Engines: Pratt And Whitney PT6A 650 horsepower turbo prop - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: B & S Flyers Inc, doing business as B & S Flyers Inc - Registered owner: B & S Flyers Inc - Airworthiness certificate: Special, Restricted (Special) - Departed: KPTN, Patterson, LA - Destination: KPTN, Patterson, LA - Airport: KPTN, Harry P Williams Memorial ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 59; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, with waivers/limitations; seat: single; flight hours: 15,000 total, 13,500 in this make and model, 14,000 as pilot in command, 450 in the last 90 days, 150 in the last 30 days, 10 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 80° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 84 °F, dew point 72 °F - Altimeter: 30.04 inHg - Observed at: KPTN ## 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 20080918848079A](https://openairdocs.org/incident/20080918848079A), Sep 18, 2008: Scwzer G164B, Patterson, LA, Substantial damage. (-23) Pilot was in cruise flight, engine sputtered, and quit, pilot landed aircraft in field se of Patterson airport, after landing the aircraft, the aircraft… ## Other investigations on N425LS (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 ERA14LA368](https://openairdocs.org/ntsb/ERA14LA368), Jul 25, 2014: Gulfstream-Schweizer A/C G-164B (N425LS), Bonifay, FL, substantial damage. Probable cause: A partial blockage of the No. 2 bearing oil nozzle jet by bearing material, which resulted in oil starvation and the subsequent failure of the No. 2 bearing and total 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.