# Final NTSB investigations: Pratt & Whitney R-985 series, ND NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB CEN12LA458](https://openairdocs.org/ntsb/CEN12LA458.md): Grumman G-164A · Egeland, ND · Accident · No injuries · Limited investigation · Final report · Jul 7, 2012 · N6583 · Substantial damage > The partial loss of engine power for reasons that could not be determined during postaccident examinations. - [NTSB CEN11CA071](https://openairdocs.org/ntsb/CEN11CA071.md): Grumman G-164 · Michigan, ND · Accident · No injuries · Data collection · Final report · Oct 11, 2010 · N554Y · Substantial damage > The pilot's failure to abort the takeoff roll following a noticeable loss of engine power due to low engine compression and a magneto failure. - [NTSB CEN09CA452](https://openairdocs.org/ntsb/CEN09CA452.md): Weatherly 620B · New England, ND · Accident · Minor injuries · Data collection · Final report · Jul 21, 2009 · N2027K · Substantial damage > The loss of engine power for undetermined reasons while maneuvering at low altitude. - [NTSB CHI07CA161](https://openairdocs.org/ntsb/CHI07CA161.md): Weatherly 201C · Mc Clusky, ND · Accident · No injuries · Data collection · Final report · Jun 5, 2007 · N1246W · Substantial damage > The pilot's failure to check for fuel contamination during the preflight inspection, which resulted in a loss of engine power shortly after takeoff due to water contamination. Contributing factors to the accident included the rough/uneven field and the… - [NTSB CHI06CA162](https://openairdocs.org/ntsb/CHI06CA162.md): Weatherly 201B · Bowbells, ND · Accident · Minor injuries · Data collection · Final report · Jun 22, 2006 · N1263W · Substantial damage > The pilot's failure to maintain clearance to the rising terrain while maneuvering during the agricultural application flight. Contirbuting factors were the low altitude operation and the rising terrain. - [NTSB CHI05LA176](https://openairdocs.org/ntsb/CHI05LA176.md): Schweizer G-164B · Buxton, ND · Accident · No injuries · Limited investigation · Final report · Jul 7, 2005 · N6631Q · Substantial damage > A loss of engine power on takeoff due to undetermined reasons. A factor was the ditch that the airplane contacted during the forced landing. - [NTSB CHI04CA151](https://openairdocs.org/ntsb/CHI04CA151.md): Grumman-Schweizer G-164B · Hope, ND · Accident · No injuries · Data collection · Final report · Jun 10, 2004 · N48517 · Substantial damage > The pilot's failure to maintain clearance from the tree branches during the aerial-application flight. A factor to the accident was the trees. - [NTSB CHI03LA134](https://openairdocs.org/ntsb/CHI03LA134.md): Weatherly 620A · Melville, ND · Accident · Minor injuries · Limited investigation · Final report · May 24, 2003 · N4650W · Substantial damage > The pilot's failure to maintain clearance from the wires. The low altitude operation and the wires were contributing factors. - [NTSB CHI01LA273](https://openairdocs.org/ntsb/CHI01LA273.md): Grumman G-164B · Hazelton, ND · Accident · 1 fatal · Limited investigation · Final report · Aug 11, 2001 · N48624 · Destroyed > the pilot's ostentatious display when he performed a low level manuever and stalled the airplane. - [NTSB CHI01LA217](https://openairdocs.org/ntsb/CHI01LA217.md): Grumman G-164A · Mandan, ND · Accident · No injuries · Limited investigation · Final report · Jul 14, 2001 · N14AG · Substantial damage > the pilot failed to maintain clearance from the powerline. Additional factors were the thermal lift and the powerline. - [NTSB CHI01LA134](https://openairdocs.org/ntsb/CHI01LA134.md): Air Tractor G-164A · Casselton, ND · Accident · No injuries · Limited investigation · Final report · May 16, 2001 · N970X · Substantial damage > The pilot's failure to maintain directional control of the airplane while recovering from a bounced landing. A factor was the collapse of the right main landing gear. - [NTSB CHI99LA162](https://openairdocs.org/ntsb/CHI99LA162.md): Grumman-Schweizer G-164B · Buxton, ND · Accident · No injuries · Limited investigation · Final report · May 25, 1999 · N6524K · Substantial damage > the number one cylinder's separation, the pilot's visual lookout not possible through the oil given off by the number one cylinder, and the embankment. A factor in the accident was the oil. - [NTSB CHI98LA175](https://openairdocs.org/ntsb/CHI98LA175.md): Boeing Stearman A75-N1 · West Fargo, ND · Accident · No injuries · Limited investigation · Final report · May 27, 1998 · N49955 · Substantial damage > the pilot's failure to assure an adequate fuel supply in order to complete the flight. A factor associated with the accident was the soft terrain on which the forced landing was made. - [NTSB CHI97LA278](https://openairdocs.org/ntsb/CHI97LA278.md): Schweizer G-164B · Larimore, ND · Accident · 1 fatal · Limited investigation · Final report · Sep 3, 1997 · N8326K · Destroyed > the pilot delaying the swath run turnaround maneuver at the end of the field boundary, and his failure to maintain clearance between the airplane and the high tension wires. A factor was the pilot's inattentiveness regarding the time to begin the swath run… - [NTSB CHI97LA184](https://openairdocs.org/ntsb/CHI97LA184.md): Weatherly 201C · Buffalo, ND · Accident · Minor injuries · Limited investigation · Final report · Jun 25, 1997 · N1299W · Substantial damage > the pilot's inadequate preflight planning/preparation, and his failure to maintain directional control of the airplane. Water on the runway and the soft terrain were related factors. - [NTSB CHI95LA250](https://openairdocs.org/ntsb/CHI95LA250.md): Grumman G-164 · Park River, ND · Accident · No injuries · Limited investigation · Final report · Jul 27, 1995 · N949X · Substantial damage > the loss of power due to the primary lead in the left magneto being grounded against the case, and the improper clearance of the breaker point gaps. A factor was the lack of suitable terrain on which to perform the forced landing. - [NTSB CHI94DTG01](https://openairdocs.org/ntsb/CHI94DTG01.md): Grumman G-164-A · La Moure, ND · Accident · No injuries · Final report · May 26, 1994 · N5277 · Substantial damage > failure of the pilot to maintain directional control. - [NTSB CHI93LA232](https://openairdocs.org/ntsb/CHI93LA232.md): Schweizer G-164 · Northwood, ND · Accident · No injuries · Limited investigation · Final report · Jun 26, 1993 · N6719Q · Substantial damage > The pilot in command's failure to attain a proper touchdown point. - [NTSB CHI92DTG04](https://openairdocs.org/ntsb/CHI92DTG04.md): Grumman G-164B · Grandin, ND · Accident · No injuries · Final report · Aug 14, 1992 · N48687 · Substantial damage > The cracked cylinder which resulted in a forced landing. The lack of suitable terrain on which to make an emergency landing was a factor. - [NTSB CHI92DTG03](https://openairdocs.org/ntsb/CHI92DTG03.md): Grumman G-164A · Orr, ND · Accident · No injuries · Final report · Jun 24, 1992 · N9935 · Substantial damage > A stall encountered during the spray run reversal turn. Factors related to the accident are the attempted downwind turn, and insufficient altitude for recovery. - [NTSB CHI91DTG08](https://openairdocs.org/ntsb/CHI91DTG08.md): Grumman G164B · Minto, ND · Accident · No injuries · Final report · Aug 17, 1991 · N8351K · Substantial damage > Inadequate aircraft servicing, inadequate aircraft preflight, fuel contamination, and unsuitable soft terrain in which to effect an emergency landing. - [NTSB CHI91DTG03](https://openairdocs.org/ntsb/CHI91DTG03.md): Schweizer G164 · Gwinner, ND · Accident · No injuries · Final report · Jun 16, 1991 · N48687 · Substantial damage > Inadvertent closing of the mixture by the pilot. Factors related to the accident are inadequate control shape, or size, and inattentiveness of the pilot. - [NTSB DEN88LA131](https://openairdocs.org/ntsb/DEN88LA131.md): Grumman G-164 · Ayr, ND · Accident · No injuries · Limited investigation · Final report · Jun 18, 1988 · N455Y · Substantial damage - [NTSB DEN87LA129](https://openairdocs.org/ntsb/DEN87LA129.md): Boeing A75N1 · Mandan, ND · Accident · No injuries · Limited investigation · Final report · May 2, 1987 · N75546 · Substantial damage > The pilot and his son were ferrying a recently purchased Boeing stearman to their home in Ohio. During landing roll, at an en route stop, a gust of wind lifted the tail section and the acft groundlooped. The left wing struck the runway and the acft was… - [NTSB DEN87LA101](https://openairdocs.org/ntsb/DEN87LA101.md): Boeing A75N1 · Argusville, ND · Accident · Minor injuries · Limited investigation · Final report · Apr 16, 1987 · N63915 · Substantial damage > The plt took off with a load of 46-0-0 fertilizer and proceeded to the field to be treated. The plt said when he arrived his flagger was not in position so he initiated a goaround. When the plt had turned 90 deg onto the x-wind leg the acft stalled. The plt… - [NTSB DEN86LA205](https://openairdocs.org/ntsb/DEN86LA205.md): Schweizer G164A · Grandin, ND · Accident · No injuries · Limited investigation · Final report · Jul 24, 1986 · N8379 · Substantial damage > Plt was attempting to take off from 2600 ft x 50 ft sod strip with full fuel (36 gal) and 160 gal of M22, a fungicide. Center of rwy was soft from recent rains. Plt began takeoff roll on right side of rwy. Right wing and spray boom contacted tall grain stalks… - [NTSB DEN85LTG05](https://openairdocs.org/ntsb/DEN85LTG05.md): Grumman G164A · Colfax, ND · Accident · No injuries · Final report · Aug 2, 1985 · N5364 · Substantial damage > The plt noticed the spray pump was stuck in the off position shortly after takeoff for the aerial application flt. The decision was made to land on a private strip and during landing on the soft fld, the acft contacted high vegetation and nosed down. - [NTSB DEN84LA270](https://openairdocs.org/ntsb/DEN84LA270.md): Weatherly 201B · Grand Forks, ND · Accident · No injuries · Limited investigation · Final report · Aug 27, 1984 · N1268W · Substantial damage > During initial takeoff climb at an alt of aprx 100 ft AGL, engine began missing. Unable to maintain alt, forced landing was made in a plowed field during which landing gear was torn from the acft. Inspection revealed #5 cylinder head separated from the… - [NTSB DEN84LA253](https://openairdocs.org/ntsb/DEN84LA253.md): Grumman G-164A · Arthur, ND · Accident · No injuries · Limited investigation · Final report · Aug 17, 1984 · N5332 · Substantial damage > Acft flown at high gross weight in high density altitude conditions. The plt said takeoff pwr was added too late to stopthe descent at the start of a spray run. - [NTSB DEN84LA204](https://openairdocs.org/ntsb/DEN84LA204.md): Grumman G-164A · Page, ND · Accident · No injuries · Limited investigation · Final report · Jun 29, 1984 · N5332 · Substantial damage > Engine siezed during takeoff climb at alt of aprx 100 ft AGL. Acft contacted trees during the forced landing. Examination of engine turbo section revealed the blower section had separated as a result of bearing failure. According to a mechanic who… - [NTSB DEN84LA179](https://openairdocs.org/ntsb/DEN84LA179.md): Grumman G-164 · Kindred, ND · Accident · No injuries · Limited investigation · Final report · Jun 13, 1984 · N10247 · Substantial damage > The engine quit on the first swath run after a carburetor change. Substantial damage resulted from the forced landing. Subsequent examination of the carburetor revealed fouling by sealant material partially dissolved by fuel. - [NTSB DEN83LA166](https://openairdocs.org/ntsb/DEN83LA166.md): Weatherly 201B · Thompson, ND · Accident · No injuries · Limited investigation · Final report · Jul 15, 1983 · N1279W · Substantial damage > The acft crashed during descent for the first swath run. Investigation revealed that the pilot applied back pressure to the control stick to flare from the descent. The acft did not respond and continued to descend. The impact was hard enough to tear the left… - [NTSB DEN83LA170](https://openairdocs.org/ntsb/DEN83LA170.md): Grumman G-164B · Page, ND · Accident · No injuries · Limited investigation · Final report · Jun 29, 1983 · N6652Q · Substantial damage > While spraying at dusk, the plt was concerned about injuring a 'non-target crop' across the road to the south from the field that was being sprayed. He stated that an irrigation system was sitting pointed southwest, and that as he was entering a swath to the… - [NTSB DEN82DA157](https://openairdocs.org/ntsb/DEN82DA157.md): Cessna 172 · Grafton, ND · Accident · No injuries · Final report · Aug 7, 1982 · N8909V · 2 aircraft · Substantial damage > The pilot stated that when he began to taxi he noticed a Cessna 172 with its engine running in front of a hangar, about 500 feet ahead and to his left. Continuing his taxi, the pilot's attention was diverted by an aircraft on the right. When he looked forward… - [NTSB DEN81FTG15](https://openairdocs.org/ntsb/DEN81FTG15.md): Boeing B75N1 · Northwood, ND · Accident · Serious injuries · Closed · Jul 28, 1981 · N9691H · Destroyed - [NTSB MKC77FTG10](https://openairdocs.org/ntsb/MKC77FTG10.md): Boeing A75N1 · Grand Forks, ND · Accident · Minor injuries · Closed · Jul 15, 1977 · N59249 · Substantial damage - [NTSB MKC76DTG24](https://openairdocs.org/ntsb/MKC76DTG24.md): Grumman G-164A · Cavalier, ND · Accident · No injuries · Closed · Jul 19, 1976 · N600T · Substantial damage - [NTSB MKC72FTG23](https://openairdocs.org/ntsb/MKC72FTG23.md): Boeing A75N1 · Argusville, ND · Accident · No injuries · Closed · Jun 20, 1972 · N51125 · Substantial damage - [NTSB MKC66F0129](https://openairdocs.org/ntsb/MKC66F0129.md): Boeing A75 · Grand Forks, ND · Accident · No injuries · Closed · Aug 11, 1965 · N62598 · Substantial damage ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."eventStateOrRegion" = 'ND' AND c."eventCountry" = 'USA' AND c."completionStatus" = 'Completed' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52008')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=52008&state=ND&status=final --- 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.