# NTSB ERA10CA313: Grumman Acft ENG Cor-Schweizer G-164B, N6780K, Mayfield, KY, June 16, 2010 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Data collection · Final report - Date: June 16, 2010, 13:05 local (18:05 UTC) - Place: Mayfield, KY - Coordinates: 36.768333, -88.583885 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=36.7683&lon=-88.5839&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report October 21, 2010 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 76337 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA10CA313 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76337/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76337 - Page: https://openairdocs.org/ntsb/ERA10CA313 ## Probable cause The pilot's improper recovery from a bounced landing, resulting in a nose-over. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Grumman Acft ENG Cor-Schweizer G-164B, 1 case](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=3952802), [All aircraft, 1,386 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot; cases with it: [Grumman Acft ENG Cor-Schweizer G-164B, 11 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=3952802), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096) (defining event); cases with it: [Grumman Acft ENG Cor-Schweizer G-164B, 19 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=3952802), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis According to the pilot, he was conducting a short-field landing as part of a Federal Aviation Administration Part 137 agricultural certification flight. He reported that as he approached runway 36, his airspeed and altitude were appropriate. Upon initial contact with the runway, the airplane bounced and the pilot corrected the airplane pitch to slightly nose-down and continued the landing sequence. After contacting the runway again, the airplane entered an excessive nose-down attitude, which the pilot tried to correct by pulling aft on the flight controls. The airplane continued to nose over and came to rest inverted, substantially damaging the empennage, forward fuselage, and wings. The pilot did not report any mechanical failures or malfunctions of the airplane. He noted that his total flight experience was approximately 374 hours; of which, about 25 hours were in the same make and model as the accident airplane. The winds reported at an airport 20 miles northwest of the accident location, about the time of the accident, were calm. ## Factual narrative According to the pilot, he was conducting a short-field landing as part of a Federal Aviation Administration Part 137 agricultural certification flight. He reported that as he approached runway 36, his airspeed and altitude were appropriate. Upon initial contact with the runway, the airplane bounced and the pilot corrected the airplane pitch to slightly nose-down and continued the landing sequence. After contacting the runway again, the airplane entered an excessive nose-down attitude, which the pilot tried to correct by pulling aft on the flight controls. The airplane continued to nose over and came to rest inverted, substantially damaging the empennage, forward fuselage, and wings. The pilot did not report any mechanical failures or malfunctions of the airplane. He noted that his total flight experience was approximately 374 hours; of which, about 25 hours were in the same make and model as the accident airplane. The winds reported at an airport 20 miles northwest of the accident location, about the time of the accident, were calm. ## Aircraft - Registration: [N6780K](https://openairdocs.org/deregistered/N6780K-2013-10-30), registration cancelled 2013-10-30, S/N 471B, built 1978 (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 R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 471B - Airframe hours: 10299 - Engines: P&W R-985-14B 450 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: Kentucky Air Service Inc. - Registered owner: Kentucky Air Service Inc. - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, March 10, 2010 - Departed: M25, Mayfield, KY - Destination: M25, Mayfield, KY - Airport: M25, Mayfield Graves Country Airpor, runway 36, 5,001 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; injuries: serious; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review March 27, 2010; seat: single; flight hours: 374 total, 25 in this make and model, 282 as pilot in command, 30 in the last 90 days, 8 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 86 °F, dew point 72 °F - Altimeter: 30.06 inHg - Observed at: PAH, 20 nm away ## 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 20100616035249A](https://openairdocs.org/incident/20100616035249A), Jun 16, 2010: Grumman Acf G-164B, Mayfield, KY, Minor damage. The pilot was performing required 14CFRPART 137 agricultural pilot knowledge &skill test for certification. When demonstrating the landing portion of the test,… ## Docket (4 files) The files NTSB released with the investigation on July 19, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76337. 2.9 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 491 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40332738&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Weather Reports and Records: KPAH METARs (item 2, .PDF, 30 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40333022&FileExtension=.PDF&FileName=Weather%20Reports%20and%20Records%3A%20KPAH%20METARs-Master.PDF - Photo - Front View of Main Wreckage (Courtesy of FAA) (item 3, .PDF, 1.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40333026&FileExtension=.PDF&FileName=Photo%20-%20Front%20View%20of%20Main%20Wreckage%20(Courtesy%20of%20FAA)-Master.PDF - Photo - Side View of Main Wreckage (Courtesy of FAA) (item 4, .PDF, 868 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40333027&FileExtension=.PDF&FileName=Photo%20-%20Side%20View%20of%20Main%20Wreckage%20(Courtesy%20of%20FAA)-Master.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.