# NTSB CHI99LA215: Grumman-Schweizer G-164B, N6633K, Page, ND, July 3, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 3, 1999, 08:00 local (13:00 UTC) - Place: Page, ND - Coordinates: 47.150447, -97.569496 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.1504&lon=-97.5695&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 22, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 46738 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI99LA215 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46738/pdf - Page: https://openairdocs.org/ntsb/CHI99LA215 ## Probable cause the pilot's failure to compensate for the wind conditions. Factors were the sudden windshift and the crops. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight collision with terrain/water, takeoff - weather condition - sudden windshift (contributing factor) - compensation for wind conditions - not performed, pilot in command (cause) - terrain condition - crop (contributing factor) ## Analysis The pilot said that winds were 7 mph out of the northeast. He stated that the aircraft ran up normally. He said that he checked the windsock in the run up area and it was still indicating wind out of the northeast. He said that on takeoff, the airplane rotated and started to fly. He stated that the airplane did not produce any further lift and impacted corn and terrain off the departure end of runway 35. He said that after the accident, he noticed the wind had shifted to the southeast. ## Factual narrative On July 3, 1999, at 0800 central daylight time, a Grumman-Schweizer G-164B, N6633K impacted crops and terrain on takeoff from runway 35 (2,600 feet X 30 feet/dry asphalt) at Page Regional Airport, Page, North Dakota. The instrument rated commercial pilot reported no injuries. Visual meteorological conditions prevailed during the 14 CFR Part 137 aerial application flight. The airplane was not on a flight plan. The flight was originating at the time of the accident. The pilot stated that he had 375 gallons of chemical and water mixture and 60 gallons of 100 low lead fuel onboard. The pilot said that the local temperature was around 70 degrees Fahrenheit and winds were 7 mph out of the northeast. He stated that the aircraft ran up normally. He said that he checked the windsock in the run up area and it was still indicating wind out of the northeast. He said that on takeoff the airplane rotated and started to fly. He stated that the airplane did not produce any further lift and he impacted corn and terrain off the departure end of runway 35. After the accident he said that he noticed the wind shifted to the southeast. ## Aircraft - Registration: [N6633K](https://openairdocs.org/deregistered/N6633K-2025-04-30), registration cancelled 2025-04-30, S/N 400B (OpenAirDocs) - Reported make and model: Grumman-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: 400B - Airframe hours: 2938 - Engines: P&W R-1340-S3H1-G 600 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Tall Towers Aviation, Inc. - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, July 1, 1999, 22 hours before - Departed: 64G - Destination: 64G - Airport: 64G, Page Regional Airport, runway 35, 2,600 × 30 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 36; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 5,246 total, 102 in this make and model, 5,127 as pilot in command, 45 in the last 90 days, 44 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 320° at 10 knots - Visibility: 7 statute miles - Lowest ceiling: 3,200 ft overcast - Temperature: 63 °F, dew point 63 °F - Altimeter: 29.00 inHg - Observed at: GFK, 14 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 19990703046169A](https://openairdocs.org/incident/19990703046169A), Jul 3, 1999: Scwzer G164B, Page, ND, No damage. (-23) On July 3, 1999 at 0730 local time a Grumman G-164 registered to tall towers aviation inc was damaged during takeoff fro an aerial application flight.… ## Other investigations on N6633K (3) 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 WPR24LA282](https://openairdocs.org/ntsb/WPR24LA282), Aug 13, 2024: Grumman Acft ENG Cor-Schweizer G-164B (N6633K), Durham, CA, substantial damage. Probable cause: The pilot’s failure to maintain clearance from powerlines, which resulted in a wire strike. - [NTSB CHI97LA204](https://openairdocs.org/ntsb/CHI97LA204), Jul 7, 1997: Grumman-Schweizer G-164B (N6633K), Donnelly, MN, substantial damage. Probable cause: undetermined event resulting in the broken connecting rod and cylinder. - [NTSB LAX91LA301](https://openairdocs.org/ntsb/LAX91LA301), Jul 9, 1991: Grumman G-164B (N6633K), Eloy, AZ, substantial damage. Probable cause: THE FAILURE OF THE PILOT TO MAINTAIN THE TERRAIN CLEARANCE OF THE AIRCRAFT WHILE MANEUVERING FOR A POTENTIAL EMERGENCY LANDING ON A MOONLESS DARK NIGHT. 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.