# NTSB CEN10CA386: Grumman Acft ENG Cor-Schweizer G-164B, N6513K, Chillicothe, MO, July 9, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: July 9, 2010, 18:00 local (23:00 UTC) - Place: Chillicothe, MO - Coordinates: 39.781944, -93.496109 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.7819&lon=-93.4961&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Loss of control in flight](https://openairdocs.org/ntsb-events/240) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 20, 2010 - Report: Approved by Office Director - NTSB office: Central Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 76588 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN10CA386 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76588/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76588 - Page: https://openairdocs.org/ntsb/CEN10CA386 ## Probable cause The pilot's failure to maintain aircraft control during takeoff. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters](https://openairdocs.org/ntsb-findings/01062000): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Grumman Acft ENG Cor-Schweizer G-164B, 4 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md?model=3952802), [All aircraft, 1,269 cases](https://openairdocs.org/ntsb-findings/01062000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Grumman Acft ENG Cor-Schweizer G-164B, 5 cases](https://openairdocs.org/ntsb-events/240/sequence.md?model=3952802), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md) ## Analysis The aerial application flight was one of several that day at the same aircraft weight, ambient temperature, and wind speed. Due to some variable winds, the pilot elected to takeoff in a different direction from the previous flights. Approximately 30 feet above ground level and above the tree line, the pilot felt the airplane begin to sink and he was unable to maintain altitude. He stated, "I believe there was a very small wind shear or wind shift just above the tree line and I had not yet achieved enough forward airspeed to overcome the loss in lift." The airplane impacted terrain and came to rest inverted. Examination of the airplane revealed the engine was separated from the airframe and the empennage was bent. No anomalies were noted with the airframe or engine that would have precluded normal operation. The accident day was the first time the pilot conducted aerial application flight activity. ## Factual narrative According to the pilot, the aerial application flight was one of several that day at the same aircraft weight, ambient temperature, and wind speed. Due to some variable winds, the pilot elected to takeoff in a different direction from the previous flights. Approximately 30 feet above ground level and above the tree line, the pilot felt the airplane begin to sink and he was unable to maintain altitude. He stated, "I believe there was a very small wind shear or wind shift just above the tree line and I had not yet achieved enough forward airspeed to overcome the loss in lift." The airplane impacted terrain and came to rest inverted. Examination of the airplane revealed the engine was separated from the airframe and the empennage was bent. No anomalies were noted with the airframe or engine that would have precluded normal operation. The accident day was the first time the pilot conducted aerial application flight activity. ## Aircraft - Registration: [N6513K](https://openairdocs.org/deregistered/N6513K-2026-09-21), registration cancelled 2026-09-21, S/N 347B, built 1977 (OpenAirDocs) - Reported make and model: GRUMMAN ACFT ENG COR-SCHWEIZER G-164B - Registry model: [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (registry code 3952802) (OpenAirDocs) - Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 347B - Airframe hours: 11000 - Engines: P&W R-985 SERIES 450 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, December 14, 2009 - Departed: CHT, Chillicothe, MO - Destination: CHT, Chillicothe, MO - Airport: CHT, Chillicothe Municipal Airport, runway 14, 3,899 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 42; injuries: minor; flight instructor, airline transport, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane, helicopter; medical: class 1, without waivers/limitations; last flight review March 23, 2010; seat: center; flight hours: 11,000 total, 25 in this make and model, 9,000 as pilot in command, 100 in the last 90 days, 19 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 7 knots - Visibility: 20 statute miles - Lowest ceiling: none - Temperature: 90 °F - Altimeter: 30.02 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 20100709037199A](https://openairdocs.org/incident/20100709037199A), Jul 9, 2010: Grumman Acf G-164B, Chillicothe, MO, Substantial damage. Part 137 aircraft departed runway 14 at the Chillicothe airport (CHT) close to maximum gross weight, with a chemical load onboard. While climbing out of ground… ## Docket (1 files) The files NTSB released with the investigation on September 13, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76588. 313 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 313 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40333634&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF 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.