# NTSB investigations: Pratt & Whitney R1340 series, ID 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 WPR23LA211](https://openairdocs.org/ntsb/WPR23LA211.md): Rockwell International S-2R · Paul, ID · Accident · No injuries · Class 4 · Limited · Final report · Jun 3, 2023 · N4894X · Substantial damage > The pilot’s failure to maintain directional control on the takeoff roll, resulting in a runway excursion. - [NTSB GAA19CA283](https://openairdocs.org/ntsb/GAA19CA283.md): Rockwell S2R · Grangeville, ID · Accident · No injuries · Data collection · Final report · May 24, 2019 · N5569X · Substantial damage > The pilot's exceedance of the airplane's critical angle of attack while turning at low altitude, which resulted in an aerodynamic stall. - [NTSB WPR16LA159](https://openairdocs.org/ntsb/WPR16LA159.md): Air Tractor AT 301 · Weiser, ID · Accident · No injuries · Limited investigation · Final report · Aug 2, 2016 · N23923 · Substantial damage > A partial loss of engine power due to an internal catastrophic failure of the master rod crankpin bearing. - [NTSB WPR16FA120](https://openairdocs.org/ntsb/WPR16FA120.md): Rockwell S2R · De Smet, ID · Accident · 1 fatal · Field investigation · Final report · Jun 6, 2016 · N4191X · Substantial damage > The pilot's inadequate visual lookout, which resulted in his failure to maintain clearance from guy wires during an aerial application flight. Contributing to the accident was the pilot's reduced ability to see the guy wires due to sun glare. - [NTSB WPR16LA082](https://openairdocs.org/ntsb/WPR16LA082.md): Grumman G164 · Juliaetta, ID · Accident · No injuries · Limited investigation · Final report · Mar 12, 2016 · N6894Q · Substantial damage > A partial loss of engine power due to a crack in the No. 2 cylinder. - [NTSB WPR12CA103](https://openairdocs.org/ntsb/WPR12CA103.md): Rockwell International S-2R · Yellow Pine, ID · Accident · No injuries · Data collection · Final report · Feb 5, 2012 · N4894X · Substantial damage > The pilot did not reduce the airplane’s descent rate prior to the landing flare/touchdown, which resulted in a hard landing. - [NTSB WPR11LA366](https://openairdocs.org/ntsb/WPR11LA366.md): Ayres S2R-600 · Hazelton, ID · Accident · No injuries · Limited investigation · Final report · Aug 3, 2011 · N4021S · Substantial damage > Partial loss of engine power for undetermined reasons. - [NTSB WPR11LA238](https://openairdocs.org/ntsb/WPR11LA238.md): Grumman G-164A · Hazelton, ID · Accident · No injuries · Limited investigation · Final report · May 28, 2011 · N9724 · Substantial damage > A total loss of engine power during low-level maneuvering due to an excessively worn carburetor. - [NTSB WPR10CA444](https://openairdocs.org/ntsb/WPR10CA444.md): Schweizer 164B · Murtaugh, ID · Accident · Minor injuries · Data collection · Final report · Sep 2, 2010 · N7502Y · Substantial damage > The pilot’s inadequate compensation for the wind and failure to maintain directional control during the takeoff roll. - [NTSB WPR10CA410](https://openairdocs.org/ntsb/WPR10CA410.md): Gulfstream-Schweizer A/C Gulfstream AM G-164B · Genesee, ID · Accident · No injuries · Data collection · Final report · Aug 18, 2010 · N8150K · Substantial damage > The pilot’s failure to maintain clearance from terrain during low-altitude maneuvering. - [NTSB LAX08LA083](https://openairdocs.org/ntsb/LAX08LA083.md): Gulfstream-Schweizer G-164B · Genesee, ID · Accident · Minor injuries · Limited investigation · Final report · Mar 22, 2008 · N8148K · Substantial damage > The in-flight failure of the rudder attachment point due to severe corrosion, which made directional control of the airplane not possible during landing. - [NTSB SEA06CA111](https://openairdocs.org/ntsb/SEA06CA111.md): North American SNJ-6 · American Falls, ID · Accident · No injuries · Data collection · Final report · Jun 4, 2006 · N45CK · Substantial damage > The pilot's performance of low altitude flight and his failure to maintain clearance with a power line, which resulted in an in-flight collision with the power line. - [NTSB SEA06CA117](https://openairdocs.org/ntsb/SEA06CA117.md): Ayres S-2R · Grand View, ID · Accident · No injuries · Data collection · Final report · Jun 2, 2006 · N5047X · Substantial damage > The pilot's inadvertent reduction of turbine engine power to the reverse position while landing on a desert road. A factor was the fence adjacent to the road. - [NTSB SEA05LA126](https://openairdocs.org/ntsb/SEA05LA126.md): Rockwell S-2R · Mountain Home, ID · Accident · No injuries · Limited investigation · Final report · Jun 24, 2005 · N4865X · Substantial damage > The pilot's inadequate in-flight decision by failing to refuel resulting in fuel exhaustion during cruise flight and the loss of engine power. A vehicle was a factor in the on ground collision. - [NTSB SEA04LA125](https://openairdocs.org/ntsb/SEA04LA125.md): Schweizer G-164B · Wendell, ID · Accident · No injuries · Limited investigation · Final report · Jul 7, 2004 · N7502Y · Substantial damage > A cracked cylinder head which resulted in a loss of engine power while maneuvering. High vegetation was a factor. - [NTSB SEA04LA099](https://openairdocs.org/ntsb/SEA04LA099.md): Grumman G-164B · Midvale, ID · Accident · Serious injuries · Limited investigation · Final report · Jun 5, 2004 · N8440K · Destroyed > The failure of the pilot to maintain clearance from the high tension powerline. A factor was the powerline. - [NTSB SEA04LA093](https://openairdocs.org/ntsb/SEA04LA093.md): Grumman G-164 · Rexburg, ID · Accident · Minor injuries · Limited investigation · Final report · Jun 1, 2004 · N657Y · Substantial damage > The pilot's failure to maintain clearance from an object while maneuvering during an aerial application flight. Contributing factors were the pilot's diverted attention and the irrigation pivot. - [NTSB SEA02LA123](https://openairdocs.org/ntsb/SEA02LA123.md): Grumman-Schweizer G-164B · Weiser, ID · Accident · No injuries · Limited investigation · Final report · Jul 6, 2002 · N8440K · Substantial damage > The fracture of the number 3 cylinder exhaust pushrod resulting in the exhaust valve's inability to open during the exhaust cycle and the subsequent engine stoppage. Contributing factors were the ditch and elevated roadway which the aircraft crossed during… - [NTSB SEA00LA141](https://openairdocs.org/ntsb/SEA00LA141.md): Rockwell S-2R · Grand View, ID · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 2000 · N4925X · Substantial damage > Internal deterioration of a fuel line, resulting in loss of engine power. Factors included obstruction of the fuel line, fuel starvation, and a fence in the forced landing area. - [NTSB SEA99LA125](https://openairdocs.org/ntsb/SEA99LA125.md): Rockwell S-2R · American Falls, ID · Accident · Minor injuries · Limited investigation · Final report · Jul 23, 1999 · N3649X · Substantial damage > A loss of engine power for undetermined reasons, and overload of the (right) main landing gear. A contributing factor was the rough terrain. - [NTSB SEA99LA115](https://openairdocs.org/ntsb/SEA99LA115.md): Grumman G-164B · Paul, ID · Accident · No injuries · Limited investigation · Final report · Jul 12, 1999 · N8005C · Substantial damage > The pilot's failure to attain adequate airspeed during takeoff and initial climb, resulting in stall/mush and inability of the aircraft to sustain level flight. Factors included high density altitude, a tailwind, an uphill takeoff surface, and crops in the… - [NTSB SEA99LA075](https://openairdocs.org/ntsb/SEA99LA075.md): Air Tractor AT-401 · Jerome, ID · Accident · No injuries · Limited investigation · Final report · May 27, 1999 · N6024M · Substantial damage > Fuel exhaustion. Carburetor contamination and rough terrain were factors. - [NTSB SEA98LA080](https://openairdocs.org/ntsb/SEA98LA080.md): Air Tractor AT-401 · Idaho Falls, ID · Accident · Minor injuries · Limited investigation · Final report · May 20, 1998 · N1009T · Substantial damage > The pilot's failure to maintain clearance from a power transmission line during an aerial application flight. Factors include a power line located just beyond the boundary of the field being sprayed, and the pilot's incorrect judgement of the distance between… - [NTSB SEA96LA172](https://openairdocs.org/ntsb/SEA96LA172.md): Grumman-Schweizer G-164A · Dubois, ID · Accident · No injuries · Limited investigation · Final report · Jul 27, 1996 · N5390 · Substantial damage > failure of the pilot to remain clear of an irrigation spray device, which resulted in inadvertent water ingestion and flameout of the aircraft's turboprop engine. Factors relating to the accident were: the proximity of the irrigation spray device (close to… - [NTSB SEA96LA113](https://openairdocs.org/ntsb/SEA96LA113.md): Ayres S2R · Aberdeen, ID · Accident · Serious injuries · Limited investigation · Final report · Jun 6, 1996 · N5686X · Substantial damage > pilot's improper planning/decision, and subsequent incapacitation, which resulted in a loss of aircraft control and collision with the terrain. Factors relating to the accident were: pilot fatigued from a long-distance drive with minimal rest, physical… - [NTSB SEA95LA138](https://openairdocs.org/ntsb/SEA95LA138.md): Grumman G-164A · Burley, ID · Accident · No injuries · Limited investigation · Final report · Jul 8, 1995 · N8946H · Substantial damage > A total loss of engine power due to fatigue failure of the crankshaft. A factor in the accident was the lack of suitable terrain for the forced landing. - [NTSB SEA95LA108](https://openairdocs.org/ntsb/SEA95LA108.md): Air Tractor AT-301A · Terreton, ID · Accident · Minor injuries · Limited investigation · Final report · May 29, 1995 · N31580 · Substantial damage > The pilot's failure to maintain an adequate altitude to overcome the downdraft. The downdraft was a factor. - [NTSB SEA92LA174](https://openairdocs.org/ntsb/SEA92LA174.md): Grumman G-164A · Paul, ID · Accident · No injuries · Limited investigation · Final report · Aug 4, 1992 · N4653 · Substantial damage > The pilot's selection of unsuitable terrain. The soft terrain was a factor. - [NTSB SEA91LA200](https://openairdocs.org/ntsb/SEA91LA200.md): Rockwell S-2R · Murtaugh, ID · Accident · No injuries · Limited investigation · Final report · Aug 3, 1991 · N4865X · Substantial damage > The improper preflight planning/decision by the pilot, resulting in his attempt to takeoff with the aircraft loaded over maximum certificated gross takeoff weight. - [NTSB SEA90LA105](https://openairdocs.org/ntsb/SEA90LA105.md): Air Tractor AT-401 · Jerome, ID · Accident · No injuries · Limited investigation · Final report · Jun 21, 1990 · N4530N · Substantial damage > The pilot did not maintain a proper altitude while maneuvering to reverse direction. - [NTSB SEA89LA135](https://openairdocs.org/ntsb/SEA89LA135.md): Grumman G-164A · Albion, ID · Accident · Minor injuries · Limited investigation · Final report · Jul 19, 1989 · N8377 · Substantial damage > The pilot's improper use of the mixture control during takeoff. The fence was a related factor. - [NTSB SEA89LA071](https://openairdocs.org/ntsb/SEA89LA071.md): Air Tractor AT-301 · Grangeville, ID · Accident · Minor injuries · Limited investigation · Final report · Apr 17, 1989 · N4340S · Substantial damage > A partial power loss due to a blower failure. A factor related to the accident was the soft field condition. - [NTSB SEA86LA179](https://openairdocs.org/ntsb/SEA86LA179.md): Ayres S2R · Nampa, ID · Accident · 1 fatal · Limited investigation · Final report · Jul 25, 1986 · N5511X · Destroyed > Ground personnel reported the acft entered procedure turnaround in an excessive attitude, appeared to stall, rolled inverted and struck the ground. No evidence found of pre-impact mechanical failure or malfunction. - [NTSB SEA85LYA01](https://openairdocs.org/ntsb/SEA85LYA01.md): Rockwell S2R · Caldwell, ID · Accident · No injuries · Final report · Aug 4, 1985 · N5511X · Substantial damage > An aero commander S2R had been modified by the installation of an air research TPE-331-43A power plant. During an aerial application flight the pilot heard a loud bang and experienced a loss of power. Investigation revealed the first stage turbine whee, part… - [NTSB SEA85LA146](https://openairdocs.org/ntsb/SEA85LA146.md): Grumman 164B · Twin Falls, ID · Accident · No injuries · Limited investigation · Final report · Jun 22, 1985 · N6762K · Substantial damage > A partial loss of power occurred during aerial application due to a crack around one of the cylinders. While the plt was attempting to dump chemicals, the acft settled onto the ground tearing off the rt main gear. The plt then flew on to Twin Falls to land.… - [NTSB SEA84LA199](https://openairdocs.org/ntsb/SEA84LA199.md): Rockwell Thrush SR2 · Nampa, ID · Accident · No injuries · Limited investigation · Final report · Aug 14, 1984 · N5553X · Substantial damage > The acft began to lose power while engaged in aerial application so the plt dumped his load and headed for the airstrip. Enroute the power deteriorated so the plt elected to land. Cutting the mixture gave the engine a surge which caused an overshoot into… - [NTSB SEA84FA110](https://openairdocs.org/ntsb/SEA84FA110.md): Rockwell S-2R · American Falls, ID · Accident · 1 fatal · Field investigation · Final report · May 19, 1984 · N4865X · Substantial damage > The load/ground crew reported that the plt planned to make 1 more spray run before flying back to the home base. When the acft did not return to the loading area, they assumed he had returned to the base. They drove 20 mi back to the base, but found neither… - [NTSB SEA82DA127](https://openairdocs.org/ntsb/SEA82DA127.md): Grumman G-164A · Burley, ID · Accident · No injuries · Final report · Jul 24, 1982 · N9532 · Destroyed > At about 20 ft AGL after takeoff the eng quit. The cause of the eng failure could not be determined. - [NTSB SEA81FYP18](https://openairdocs.org/ntsb/SEA81FYP18.md): Grumman G-164B · Harrison, ID · Accident · 1 fatal · Closed · May 23, 1981 · N48574 · Substantial damage - [NTSB SEA78DYA24](https://openairdocs.org/ntsb/SEA78DYA24.md): Grumman G-164A · Oakley, ID · Accident · Minor injuries · Closed · Sep 1, 1978 · N7365 · Substantial damage - [NTSB SEA76DYA25](https://openairdocs.org/ntsb/SEA76DYA25.md): Grumman G-164A · Hamer, ID · Accident · No injuries · Closed · Jun 5, 1976 · N7863 · Substantial damage - [NTSB SEA76DYG42](https://openairdocs.org/ntsb/SEA76DYG42.md): Grumman G-164A · Nezperce, ID · Accident · No injuries · Closed · Apr 9, 1976 · N29SK · Substantial damage - [NTSB SEA75FYA16](https://openairdocs.org/ntsb/SEA75FYA16.md): Snow 600S2R · Marsing, ID · Accident · No injuries · Closed · Aug 31, 1974 · N8973Q · Substantial damage - [NTSB SEA75DYA04](https://openairdocs.org/ntsb/SEA75DYA04.md): Grumman G-164A · Burley, ID · Accident · No injuries · Closed · Jul 14, 1974 · N7365 · Substantial damage - [NTSB SEA74FYA02](https://openairdocs.org/ntsb/SEA74FYA02.md): Aero Comdr 600S2R · Homedale, ID · Accident · Minor injuries · Closed · Jul 7, 1973 · N5553X · 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" = 'ID' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52016')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=52016&state=ID --- 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.