# NTSB FTW00LA118: Ayres S2R-G6, N3004V, Oak Grove, LA, April 6, 2000 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: April 6, 2000, 08:00 local (13:00 UTC) - Place: Oak Grove, LA - Coordinates: 32.859947, -91.389472 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=32.8599&lon=-91.3895&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report January 18, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 48951 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW00LA118 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/48951/pdf - Page: https://openairdocs.org/ntsb/FTW00LA118 ## Probable cause The failure of a spur gear from the torque sensor gear assembly resulting in a loss of engine power. A factor was the muddy terrain encountered during the forced landing. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - mech failure/malf, maneuvering - aerial application - engine assembly,gear - failure,total (cause) - Forced landing, emergency descent/landing - Nose over, landing - roll - terrain condition - muddy (contributing factor) ## Analysis The pilot reported that during the aerial application flight, the engine 'lost torque while spraying at ground level.' The pilot diverted to an adjacent open field for the forced landing. During the landing roll, the main landing gear sank in the wet field, and the airplane nosed over to the inverted position. An engine teardown revealed a failure of the spur gear from the torque sensor gear assembly. The Garrett TPE 331 engine had accumulated 8,395 flight hours since the last major overhaul. Total flight time since a hot section and gearbox change was 793 hours. ## Factual narrative On April 6, 2000, at 0800 central daylight time, an Ayres S2R-G6 agricultural airplane, N3004V, sustained substantial damage during a forced landing following a loss of engine power near Oak Grove, Louisiana. The airplane was owned and operated by Carroll Flying Service, Inc., of Pioneer, Louisiana, under 14 Code of Federal Regulations Part 137. The commercial pilot, sole occupant, was not injured. Visual meteorological conditions prevailed for the local aerial application flight, and a flight plan was not filed. The flight departed the Bayou Meadow Farm Airport near Oak Grove, Louisiana, at 0745. The pilot reported that the engine "lost torque while spraying at ground level." The pilot diverted to an adjacent open field for the forced landing. During the landing roll, the main landing gear sank in the muddy field, and the airplane nosed over to the inverted position. The FAA inspector responding to the site found structural damage to the outboard right wing leading edge, the vertical stabilizer, and the rudder. The propeller blades were bent, and the cockpit canopy was crushed. The FAA inspector reviewed the maintenance records. Total time on the aircraft was 3,446 hours. The Garrett TPE 331 engine had accumulated 8,395 flight hours since the last major overhaul. Total flight time since a hot section and gearbox change was 793 hours. The NTSB did not take possession of the aircraft. On April 25, 2000, the owner's representative observed the engine teardown at Tulsa, Oklahoma. The examination revealed a failure of the spur gear (part number 896884-1) from the torque sensor gear assembly. ## Aircraft - Registration: [N3004V](https://openairdocs.org/aircraft/N3004V), registered now, S/N G6120, built 1995 (OpenAirDocs) - Reported make and model: Ayres S2R-G6 - Registry model: [Ayres S2R-G6](https://openairdocs.org/model/ayres-s2r-g6) (registry code 0970216) (OpenAirDocs) - Registry engine: [AiResearch TPE331 series](https://openairdocs.org/engine/airesearch-tpe331-series) (registry code 01514, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: G6-120 - Airframe hours: 3445 - Engines: Garrett TPE331-6 750 horsepower turbo prop - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Carroll Flying Service, Inc. - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, January 20, 2000, 95 hours before - Departed: 9M6 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 39; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 11,000 total, 7,000 in this make and model, 11,000 as pilot in command, 250 in the last 90 days, 150 in the last 30 days, 5 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °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 20000406007049A](https://openairdocs.org/incident/20000406007049A), Apr 6, 2000: Swrngn S2RG6, Oak Grove, LA, No damage. (-23) Aircraft lost power during aerial application. Pilot diverted to an open, adjacent filed for emergency landing. Aircraft landing gear bogged down causing… 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.