# NTSB CHI02CA194: Grumman G-164, N623U, Browning, IL, July 17, 2002 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: July 17, 2002, 13:00 local (18:00 UTC) - Place: Browning, IL - Coordinates: 40.133335, -90.366668 - Nearby events: https://openairdocs.org/map.md?lat=40.1333&lon=-90.3667&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report October 24, 2002 - Report: Approved by Office Director - NTSB case key (mKey): 55252 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI02CA194 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/55252/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=55252 - Page: https://openairdocs.org/ntsb/CHI02CA194 ## Probable cause the failure of the pilot-in-command to maintain sufficient airspeed while maneuvering. The initial stages of a stall/mush condition, and the low maneuvering altitude due to the agricultural application pass, were contributing factors. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, maneuvering - aerial application - airspeed - not maintained, pilot in command (cause) - stall/mush - encountered, pilot in command (contributing factor) - Altitude deviation,uncontrolled, maneuvering - aerial application - stall/mush - encountered, pilot in command (cause) - In flight collision with terrain/water, maneuvering - Main gear collapsed, emergency landing - Nose over, emergency landing ## Analysis On July 17, 2002, at 1245 central daylight time, a Grumman G-164, N623U, piloted by commercial pilot, was substantially damaged when it gradually descended into and impacted a field after making an agricultural application pass near Browning, Illinois. The airplane had departed Schuy-Rush Airport (5K4), Rushville, Illinois, for the local flight at 1230. Visual meteorological conditions prevailed. The flight was operating under provisions of 14 CFR Part 137 at the time of the accident. The pilot was not injured. ## Factual narrative On July 17, 2002, at 1245 central daylight time, a Grumman G-164, N623U, piloted by a commercial pilot, was substantially damaged when it gradually descended into and impacted a field, after making an agricultural application pass, near Browning, Illinois. The airplane had departed Schuy-Rush Airport (5K4), Rushville, Illinois, for the local flight at 1230. Visual meteorological conditions prevailed. The flight was operating under provisions of 14 CFR Part 137 at the time of the accident. The pilot was not injured. The pilot stated that after making an agricultural pass he "pulled up over [the] trees and turned left . . . and got too slow, which I realized when I looked up. Aircraft settled and I dropped [the] nose to gain speed. But at [the] last second [I] pulled [the] nose up and contacted [the] ground. [The impact] spread the gear enough for the spreader to hit [the] ground, then [the] prop struck [the] ground and [the] aircraft went up on [its] nose and over on top." The pilot held a commercial pilot certificate, with an airplane--single-engine land rating, and a valid 2nd class medical certificate. He last passed a biennial flight review on August 20, 2001, and had accumulated over 4,900 hours total flight time. Of that, 2,500 hours were in the same make and model as the accident aircraft. The Grumman G-164 airplane, S/N 359, involved in the accident had completed an annual inspection on March 17, 2002, and accumulated a total time of 5,563 hours on the airframe (as reported by the pilot/owner). Eleven (11) hours of that time had been since the annual. The Pratt & Whitney, R-985 series, engine installed had accumulated 265 hours since last overhaul. The pilot did not report any malfunctions or failures associated with the aircraft or engine prior to, or at the time of, the accident. Weather conditions at the scene were reported by the pilot as clear, with fifteen (15) miles visibility, light southerly winds (2 kts) and no turbulence. Conditions at the Quincy Regional Airport (UIN), 39 nm to the south-west, were reported as clear, with ten (10) miles visibility and winds from 220 degrees at eight (8) knots by the on-field AWOS. Capital Airport (SPI), Springfield, Illinois, reported conditions as clear, with five (5) miles visibility in haze and winds from 230 degrees at seven (7) knots. ## Aircraft - Registration: [N623U](https://openairdocs.org/deregistered/N623U-2018-01-30), registration cancelled 2018-01-30, S/N 359, built 1965 (OpenAirDocs) - Reported make and model: Grumman G-164 - Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (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: 359 - Airframe hours: 5553 - Engines: Pratt & Whitney R-985 450 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, March 17, 2002, 11 hours before - Departed: 5K4, RUSHVILLE, IL - Destination: 5K4, RUSHVILLE, IL - Airport: 5K4, Schuy-Rush, runway 27, 3,565 × 100 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; last flight review March 17, 2002; seat: single; flight hours: 4,934 total, 2,500 in this make and model, 11 in the last 90 days, 4 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 220° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 88 °F, dew point 70 °F - Altimeter: 30.06 inHg - Observed at: UIN, 39 nm away ## Docket (1 files) The files NTSB released with the investigation on August 28, 2002, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=55252. 492 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 492 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40463343&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-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.