NTSB investigations: Pratt & Whitney R-985 series
35 cases on aircraft whose registry engine model is Pratt & Whitney R-985 series, where the first occurrence was “Loss of engine power(total) - mech failure/malf”. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1983 | 2 |
|---|---|
| 1984 | 4 |
| 1985 | 2 |
| 1986 | 1 |
| 1987 | 2 |
| 1988 | 1 |
| 1989 | 3 |
| 1990 | 1 |
| 1991 | 1 |
| 1992 | 6 |
| 1993 | 1 |
| 1995 | 3 |
| 1996 | 3 |
| 2000 | 2 |
| 2001 | 1 |
| 2003 | 1 |
| 2007 | 1 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52008')
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\" = 351))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52008')
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" = 351))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB DEN07LA122Accident · Serious injuriesLimited investigationFinal reportBeech C-45H · Longmont, COThe instructor pilot's improper preflight in that he failed to close the rocker box recovery system drain valves, resulting in a total loss of lubricating oil and subsequent oil starvation to both engines. A contributing factor was the trees.NTSB CHI03LA274Accident · No injuriesLimited investigationFinal reportBoeing A-75 · La Crosse, WIThe total loss of engine power due to a fatigue fracture of the engine's crankshaft. A factor was the corn crop.NTSB NYC02LA002Accident · Minor injuriesLimited investigationFinal reportBeech C-45H · Hudson, NHThe pilot/owner's failure to properly identify the inoperative engine prior to feathering the wrong propeller, and his lack of familiarity with the required corrective procedures. A factor was the initial engine failure.NTSB LAX00LA345Accident · No injuriesLimited investigationFinal reportGrumman-Schweizer G-164B · Tracy, CALoss of engine power due to failure and separation of the number one connecting rod.NTSB DEN00LA072Accident · Minor injuriesLimited investigationFinal reportWeatherly 201B · Rocky Ford, COA total loss of power due to an engine rocker arm failure and soft/unsuitable terrain during the subsequent forced landing.NTSB CHI96LA281Accident · No injuriesLimited investigationFinal reportGrumman-Schweizer G-164 · Grant, NEfatigue failure and subsequent catastrophic failure of the number nine cylinder. A factor was the corn.NTSB CHI96LA186Accident · No injuriesLimited investigationFinal reportGrumman-Schweizer G-164B · Crookston, MNcatastrophic engine failure.NTSB LAX96LA124Accident · No injuriesLimited investigationFinal reportSchweizer G-164B · Tracy, CAoverheating and failure of the engine's master rod and master rod bearing due to oil starvation. A factor relating to the accident was: the lack of suitable terrain for an emergency landing.NTSB FTW95LA392Accident · No injuriesLimited investigationFinal reportGrumman G-164B · Springlake, TXThe loss of engine power due to the uncontained failure of the third stage turbine wheel. A factor was the lack of suitable terrain for the forced landing.NTSB LAX95LA127Accident · No injuriesLimited investigationFinal reportBoeing B75N1 · Gaviota, CAinadequate maintenance and service of the aircraft's carburetor heat system, and the pilot's intentional flight into adverse weather conditions. The lack of a suitable area for the emergency landing was a factor.NTSB CHI95LA075Accident · No injuriesLimited investigationFinal reportBeech C45H · New Hudson, MIThe owner/pilot's inadequate maintenance practices which resulted in a loss of engine power shortly after takeoff and the pilot's inadequate emergency procedure after the power loss occurred. Related factors are trees, diminished airspeed and abrupt touchdown.NTSB CHI93LA303Accident · No injuriesLimited investigationFinal reportSchweizer G167B · Borup, MNthe loss of engine power due to a cracked cylinder head.NTSB DCA92MA048Accident · 12 fatalMajor investigationFinal reportBeech C-45H · Hinckley, ILInadequate maintenance and inspection by the operator which resulted in an engine power loss during the critical takeoff phase of flight. In addition, the pilot did not, or was unable to, attain a full-feather position on the left engine propeller, which…NTSB CHI92DEE04Accident · No injuriesFinal reportWeatherly 201B · Chana, ILFracture of a connecting rod resulting in loss of engine power.NTSB FTW92DPG14Accident · No injuriesFinal reportAir Tractor AT-300 · Wilmont, ARPower loss due to a failed cracked cylinder. A factor was the lack of suitable terrain for the forced landing.NTSB CHI92DCJ05Accident · No injuriesFinal reportGrumman-Schweizer G-164B · Atkinson, NEA cracked engine cylinder.NTSB ATL92LA154Accident · Minor injuriesLimited investigationFinal reportWeatherly 620A · Cobb, GAThe corroded, and separated, magnetic chip detector plug which allowed the loss of all engine oil and the engine's subsequent seizure. Factors were the inadequate 100 hour inspection, and the high vegetation in the forced landing field.NTSB FTW92LA101Accident · No injuriesLimited investigationFinal reportWeatherly 201B · Weatherford, OKFuel starvation due to a mechanical failure of the fuel selector. A factor was the lack of suitable terrain.NTSB LAX92LA042Accident · No injuriesLimited investigationFinal reportBeech D18S · Hilo, HIThe aircraft's lack of single engine performance to maintain altitude after the engine lost power. Factors related to the accident were: displacement/mechanical interference within the accessory drive gear system of the left engine, failure of the left engine…NTSB ANC90LA098Accident · No injuriesLimited investigationFinal reportDe Havilland DHC-2 · Caribou Lake, AKA power loss caused by the failure of a piston cylinder.NTSB MKC89LA148Accident · No injuriesLimited investigationFinal reportGrumman G-164B · Stockville, NETotal failure of the powerplant caused by a broken cylinder.NTSB ANC89LA103Accident · Serious injuriesLimited investigationFinal reportDe Havilland DHC-2 · Iliamna, AKInadequate annual inspection by maintenance personnel.NTSB FTW89DRD06Accident · No injuriesFinal reportGrumman-Schweizer G-164B · Ville Platte, LAWear and/or failure of the carburetor/float. Factors related to the accident were: the terrain conditions.NTSB MKC88LA133Accident · No injuriesLimited investigationFinal reportGrumman 164A · Poplar Bluff, MOThe pilot experienced an engine failure while attempting to land during an aerial application flight. Altitude was not adequate to select a suitable forced landing area. The aircraft impacted in a pipeline right of way and came to rest in a small stream,…NTSB SEA87LA121Accident · No injuriesLimited investigationFinal reportGrumman G-164A · Viola, IDDuring an aerial applications maneuver a total loss of power occurred due to the internal failure of the supercharger impeller. During the forced landing the left main gear collapsed causing the aircraft to nose over inverted.NTSB CHI87DEX07Accident · Serious injuriesFinal reportBoeing E75 · Mccordsville, INDuring initial climb the engine sustained a total power failure and the pilot attempted to return to the airport. The aircraft impacted in a soybean field approximately 200 feet short of the runway in a 20 degree nose down attitude. Investigation revealed the…NTSB LAX86DVA05Accident · No injuriesFinal reportGrumman G164A · Snelling, CAThe plt stated he had just lifted off during takeoff when the eng quit. The acft then stalled, hitting a canal and shearing off the main landing gear. The plt stated that a broken fuel line is suspect due to the sudden stoppage and intense ground fire. The…NTSB NYC86FHM02Accident · Serious injuriesFinal reportGrumman 164-A · Walden, NYThe pilot of a Grumman 164A was crop dusting when he experienced an engine failure. He decided not to dump the load due to possible later repercussions. The aircraft lacked sufficent airspeed or altitude to make a safe landing. The aircraft received…NTSB FTW85LA142Accident · No injuriesLimited investigationFinal reportBeech E18S · Pharr, TXThe plt took off at about 0600 CST on a local test flt following an eng change. He received a special VFR clearance from the control tower, but did not obtain an IFR clearance. At 0605, the wx at mcallen, TX was in part: 500 ft obscured, visibility 2 mi, wind…NTSB DEN84LA235Accident · No injuriesLimited investigationFinal reportGrumman G-164A · Chamerlain, SDThe pilot experienced an engine failure and executed an emergency landing on a narrow road which resulted in one of the landing gear touching down on the soft shoulder. The landing gear failed and substantial damage resulted. Examination of the engine…NTSB DEN84LA204Accident · No injuriesLimited investigationFinal reportGrumman G-164A · Page, NDEngine 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 FTW84LA236Accident · No injuriesLimited investigationFinal reportBeech D17S · Stratford, TXThe pilot stated after the accident that the engine failure occurred as the acft climbed through 6500 feet. According to the plt the no. 1 cylinder separated from the radial eng. The acft nosed over during the landing on unimproved terrain.NTSB MIA84LA060Accident · Minor injuriesLimited investigationFinal reportGrumman AG-CAT · Homestead, FLThe acft crashed during a forced landing after the engine lost power. Investigation revealed that that # 8 cylinder failed. The original cracking was determined to be from fatigue.NTSB FTW83LA243Accident · No injuriesLimited investigationFinal reportWeatherly 620 · Cornerstone, ARThe acft collided with a dirt bank during a forced landing after the engine quit. The plt said he was making a swath runwhen the engine quit. The flagman said he saw black smoke then white smoke as the engine quit. Post crash investigation revealed that the…NTSB ATL83FA171Accident · No injuriesField investigationFinal reportBoeing A75N1 · Kennesaw, GAWhile over a wooded area at 800 ft AGL the eng failed. The plt was unable to reach a suitable landing site before contacting the ground on an embankment below the elevation of a nearby road. The acft struck a telephone cable prior to touchdown. The #4 conrod…