# NTSB FTW96LA070: Grumman G-164B, N6642K, Pawnee, OK, December 13, 1995 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: December 13, 1995, 16:20 local (22:20 UTC) - Place: Pawnee, OK - Coordinates: 36.329498, -96.800804 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=36.3295&lon=-96.8008&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report February 14, 1996 - Report: Approved by Office Director - NTSB case key (mKey): 19727 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW96LA070 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/19727/pdf - Page: https://openairdocs.org/ntsb/FTW96LA070 ## Probable cause THE PILOT'S FAILURE TO MAINTAIN ADEQUATE CLEARANCE FROM THE TERRAIN. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight collision with terrain/water, maneuvering - aerial application - terrain condition - berm - clearance - not maintained, pilot in command (cause) - landing gear,main gear - separation - Nose over, landing - roll - precautionary landing - performed, pilot in command ## Analysis THE RIGHT MAIN LANDING GEAR IMPACTED A BERM DURING A SPRAY RUN AND SEPARATED. THE PILOT LANDED IN AN OPEN FIELD, AND WHILE LANDING ON THE REMAINING MAIN GEAR, CONTROL WAS LOST AND THE AIRPLANE NOSED OVER COMING TO REST IN THE INVERTED POSITION. ALL FOUR WINGS SUSTAINED STRUCTURAL DAMAGE, AND THE ENGINE MOUNT WAS DEFORMED. ## Factual narrative On December 13, 1995, at 1620 central standard time, a Grumman G- 164B, N6642K, was substantially damaged upon impact with terrain while maneuvering near Pawnee, Oklahoma. The commercial pilot was not injured. The airplane was been operated by Cassody Flying Service as an aerial application flight under Title 14 CFR Part 137 when the accident occurred. Visual meteorological conditions prevailed for the flight for which a flight plan was not filed. According to the operator, the right main landing gear impacted a berm during a spraying run. The landing gear separated from the airframe and the pilot attempted to land in an open field to the north. The pilot was unable to control the airplane while landing with only one landing gear and control was lost during the landing roll. The airplane nosed over, coming to rest in the inverted position. All four wings sustained structural damage and the engine mount was deformed. ## Aircraft - Registration: [N6642K](https://openairdocs.org/deregistered/N6642K-2018-03-12), registration cancelled 2018-03-12, S/N 403B, built 1978 (OpenAirDocs) - Reported make and model: GRUMMAN 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: 403B - Airframe hours: 6653 - Engines: P&W R-1340-AN1 600 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Thomas B. Cassody - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, February 26, 1995, 166 hours before - Departed: NONE, COVINGTON, OK ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 38; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 1,920 total, 230 in this make and model, 1,638 as pilot in command, 10 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 250° at 7 knots - Visibility: 12 statute miles - Lowest ceiling: 25,000 ft overcast - Temperature: 61 °F, dew point 39 °F - Altimeter: 29.00 inHg - Observed at: PNC, 38 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 19951213044729A](https://openairdocs.org/incident/19951213044729A), Dec 13, 1995: Scwzer G164B, Pawnee, OK, Substantial damage. Right main gear hit a berm during spray run. Tore off gear. Nosed over landing in open field. ## Other investigations on N6642K (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 FTW83LA267](https://openairdocs.org/ntsb/FTW83LA267), Jun 4, 1983: Grumman G-164B (N6642K), Kinder, LA, substantial damage 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.