# NTSB investigations: Pratt & Whitney R1340 series, AR: Loss of engine power(partial) - mech failure/malf 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 FTW00LA097](https://openairdocs.org/ntsb/FTW00LA097.md): Grumman-Schweizer G-164A · Gillett, AR · Accident · No injuries · Limited investigation · Final report · Mar 13, 2000 · N9785 · Substantial damage > The cracked #8 cylinder resulting in failure of the cylinder. A factor was the plowed/furrowed terrain. - [NTSB FTW98LA259](https://openairdocs.org/ntsb/FTW98LA259.md): Ayres S2R · Watson, AR · Accident · No injuries · Limited investigation · Final report · Jun 5, 1998 · N4007Y · Substantial damage > The partial loss of engine power due to the disconnection of the propeller governor control as a result of the stripped threads on the propeller governor control push-pull rod. A factor was the lack of suitable terrain for the forced landing. - [NTSB FTW95LA301](https://openairdocs.org/ntsb/FTW95LA301.md): Air Tractor AT-401 · Cash, AR · Accident · No injuries · Limited investigation · Final report · Jul 11, 1995 · N1004W · Substantial damage > Engine power loss due to partial failure of one magneto combined with total failure of the other magneto. A factor was the lack of suitable terrain for a forced landing. - [NTSB FTW95LA282](https://openairdocs.org/ntsb/FTW95LA282.md): Aero Commander S2R · Newport, AR · Accident · No injuries · Limited investigation · Final report · Jul 6, 1995 · N5654X · Substantial damage > A disconnected throttle push pull rod, due to inadequate maintenance. A factor relating to the accident was: the lack of suitable terrain for the forced landing. - [NTSB FTW94LA238](https://openairdocs.org/ntsb/FTW94LA238.md): Rockwell S-2R · Winchester, AR · Accident · Serious injuries · Limited investigation · Final report · Jul 15, 1994 · N4903X · Substantial damage > The loss of power due to the number one cylinder head cracking. A factor was the lack of suitable terrain for the forced landing. - [NTSB FTW90DPG13](https://openairdocs.org/ntsb/FTW90DPG13.md): Grumman G-164A · Luxora, AR · Accident · No injuries · Final report · Aug 30, 1990 · N5213 · Substantial damage > A partial power loss due to failure of the number five connecting rod. A factor was the soft terrain in which the forced landing was made. - [NTSB MKC88LA161](https://openairdocs.org/ntsb/MKC88LA161.md): Grumman G-164A · Gillett, AR · Accident · No injuries · Limited investigation · Final report · Aug 20, 1988 · N6567 · Substantial damage > While en route to engage in an aerial application operation, the plt said the engine began to misfire and cut out. Unable to correct the malfunction, the plt dumped his chemical load and began returning to the departure airstrip. En route, he felt he would… - [NTSB MKC84LA250](https://openairdocs.org/ntsb/MKC84LA250.md): Grumman G-164A · Swifton, AR · Accident · No injuries · Limited investigation · Final report · Aug 14, 1984 · N7693 · Substantial damage > During a swath run the #9 cylinder on the radial engine separated. A forced landing was made during which the acft landed in a levee and nosed over. - [NTSB MKC84LA211](https://openairdocs.org/ntsb/MKC84LA211.md): Grumman G-164B · Roe, AR · Accident · No injuries · Limited investigation · Final report · Jul 17, 1984 · N8365K · Substantial damage > As a result of a supercharger failure, a partial power loss was experienced during a swath run. During the landing roll after a forced landing, the acft nosed over & came to rest inverted. An eng teardown revealed that both supercharger bearings had failed… - [NTSB MKC84LA217](https://openairdocs.org/ntsb/MKC84LA217.md): Grumman G-164A · Osceola, AR · Accident · No injuries · Limited investigation · Final report · Jul 13, 1984 · N7928 · Substantial damage > The acft crashed into a levee in a rice field after losing engine power during a spray operation turn-around. The enginedid not quit entirely but lost enough power so that flt was not maintained. An inspection of the engine revealed a broked connecting rod. - [NTSB MKC84LA213](https://openairdocs.org/ntsb/MKC84LA213.md): Grumman G-164A · Gillette, AR · Accident · No injuries · Limited investigation · Final report · Jul 12, 1984 · N9785 · Substantial damage > During swath run engine ran rough and could not sustain acft in flight. The plt made a forced landing in a soft freshly plowed field. The acft nosed over during the landing. Inspection of the acft revealed that one magneto was missing teethfrom the drive gear… - [NTSB FTW83LA358](https://openairdocs.org/ntsb/FTW83LA358.md): Rockwell S2R · Eudora, AR · Accident · No injuries · Limited investigation · Final report · Aug 1, 1983 · N4903X · Substantial damage > While dispensing fertilizer, oil suddenly covered the windshield & the eng began running at reduced power. The plt made an emergency landing in a water covered rice field where the wheels hit a levee & the acft nosed over. An exam revealed that the #1 exhaust… ## 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" = 'AR' 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') AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 352)) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=52016&occurrence=352&state=AR --- 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.