# NTSB CHI98LA301: Grumman-Schweizer G-164A, N8693H, La Moure, ND, August 4, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 4, 1998, 09:30 local (14:30 UTC) - Place: La Moure, ND - Coordinates: 46.36901, -98.280166 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=46.3690&lon=-98.2802&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report January 28, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 43633 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI98LA301 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/43633/pdf - Page: https://openairdocs.org/ntsb/CHI98LA301 ## Probable cause a loss of engine power due to undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, takeoff - initial climb - reason for occurrence undetermined (cause) - Forced landing, emergency landing after takeoff - In flight collision with terrain/water, emergency descent/landing - object - tree(s) ## Analysis The accident occurred during the first flight of the day. The pilot reported the engine ran normally during start, taxi, and run-up. He reported the airplane lifted off approximately 1/2 way down the runway and it started to lose power and the airplane started to settle near the end of the runway. The pilot dumped the load and veered to the right in order to avoid a power pole. The airplane contacted a grove of trees on the north side of Highway 13. The engine was successfully test run the day after the accident. ## Factual narrative On August 4, 1998, at 0930 central daylight time (cdt), a Grumman-Schweizer G-164A, N8693H, operated by Robert's Aerial Service, of La Moure, North Dakota, was substantially damaged following what the pilot stated was a loss of engine power on takeoff from runway 34 at the Rott Municipal Airport, La Moure, North Dakota. The commercial pilot was not injured. The 14 CFR Part 137 aerial application flight was operating in visual meteorological conditions without a flight plan. The flight was originating at the time of the accident. The pilot reported the accident occurred during the first flight of the day. He reported the engine ran normally during start, taxi, and run-up. He reported the airplane lifted off approximately midway down the runway and by time he reached the end of the runway, the engine started to lose power and the airplane started to settle. The pilot reported that he dumped the load and veered to the right in order to avoid a power pole. The airplane contacted a grove of trees on the north side of Highway 13. The airplane owner/operated started the airplane engine on the day following the accident. He reported that the engine operated normally. ## Aircraft - Registration: [N8693H](https://openairdocs.org/deregistered/N8693H-2008-08-01), registration cancelled 2008-08-01, S/N 1473, built 1975 (OpenAirDocs) - Reported make and model: Grumman-Schweizer G-164A - Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs) - Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 1473 - Airframe hours: 6500 - Engines: P&W R-1340 600 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Brian Robert - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, June 5, 1998, 100 hours before - Departed: ND29 - Airport: ND29, Rott Municipal ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 51; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 1,500 total, 80 in this make and model, 1,450 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 340° at 8 knots - Visibility: 9 statute miles - Lowest ceiling: 25,000 ft broken - Temperature: 70 °F, dew point 63 °F - Altimeter: 30.00 inHg - Observed at: JMS, 40 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 19980804019549A](https://openairdocs.org/incident/19980804019549A), Aug 4, 1998: Scwzer G164A, La Moure, ND, Substantial damage. Acft experienced power loss on takeoff for aerial application, pilot jettisoned the payload and crashed into trees at the departure end of the rwy. (-23) pilot… ## Other investigations on N8693H (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 FTW81FPG40](https://openairdocs.org/ntsb/FTW81FPG40), Jun 8, 1981: Grumman G-164B (N8693H), Wynne, AR, 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.